// SPDX-License-Identifier: GPL-2.0+
/*
* Adjunct processor matrix VFIO device driver callbacks .
*
* Copyright IBM Corp . 2018
*
* Author ( s ) : Tony Krowiak < akrowiak @ linux . ibm . com >
* Halil Pasic < pasic @ linux . ibm . com >
* Pierre Morel < pmorel @ linux . ibm . com >
*/
#include <linux/string.h>
#include <linux/vfio.h>
#include <linux/device.h>
#include <linux/list.h>
#include <linux/ctype.h>
#include <linux/bitops.h>
#include <linux/kvm_host.h>
#include <linux/module.h>
#include <linux/uuid.h>
#include <asm /kvm.h>
#include <asm /zcrypt.h>
#include "vfio_ap_private.h"
#include "vfio_ap_debug.h"
#define VFIO_AP_MDEV_TYPE_HWVIRT "passthrough"
#define VFIO_AP_MDEV_NAME_HWVIRT "VFIO AP Passthrough Device"
#define AP_QUEUE_ASSIGNED "assigned"
#define AP_QUEUE_UNASSIGNED "unassigned"
#define AP_QUEUE_IN_USE "in use"
#define AP_RESET_INTERVAL 20 /* Reset sleep interval (20ms) */
static int vfio_ap_mdev_reset_queues(struct ap_matrix_mdev *matrix_mdev);
static int vfio_ap_mdev_reset_qlist(struct list_head *qlist);
static struct vfio_ap_queue *vfio_ap_find_queue(int apqn);
static const struct vfio_device_ops vfio_ap_matrix_dev_ops;
static void vfio_ap_mdev_reset_queue(struct vfio_ap_queue *q);
/**
* get_update_locks_for_kvm : Acquire the locks required to dynamically update a
* KVM guest ' s APCB in the proper order .
*
* @ kvm : a pointer to a struct kvm object containing the KVM guest ' s APCB .
*
* The proper locking order is :
* 1 . matrix_dev - > guests_lock : required to use the KVM pointer to update a KVM
* guest ' s APCB .
* 2 . kvm - > lock : required to update a guest ' s APCB
* 3 . matrix_dev - > mdevs_lock : required to access data stored in a matrix_mdev
*
* Note : If @ kvm is NULL , the KVM lock will not be taken .
*/
static inline void get_update_locks_for_kvm(struct kvm *kvm)
{
mutex_lock(&matrix_dev->guests_lock);
if (kvm)
mutex_lock(&kvm->lock);
mutex_lock(&matrix_dev->mdevs_lock);
}
/**
* release_update_locks_for_kvm : Release the locks used to dynamically update a
* KVM guest ' s APCB in the proper order .
*
* @ kvm : a pointer to a struct kvm object containing the KVM guest ' s APCB .
*
* The proper unlocking order is :
* 1 . matrix_dev - > mdevs_lock
* 2 . kvm - > lock
* 3 . matrix_dev - > guests_lock
*
* Note : If @ kvm is NULL , the KVM lock will not be released .
*/
static inline void release_update_locks_for_kvm(struct kvm *kvm)
{
mutex_unlock(&matrix_dev->mdevs_lock);
if (kvm)
mutex_unlock(&kvm->lock);
mutex_unlock(&matrix_dev->guests_lock);
}
/**
* get_update_locks_for_mdev : Acquire the locks required to dynamically update a
* KVM guest ' s APCB in the proper order .
*
* @ matrix_mdev : a pointer to a struct ap_matrix_mdev object containing the AP
* configuration data to use to update a KVM guest ' s APCB .
*
* The proper locking order is :
* 1 . matrix_dev - > guests_lock : required to use the KVM pointer to update a KVM
* guest ' s APCB .
* 2 . matrix_mdev - > kvm - > lock : required to update a guest ' s APCB
* 3 . matrix_dev - > mdevs_lock : required to access data stored in a matrix_mdev
*
* Note : If @ matrix_mdev is NULL or is not attached to a KVM guest , the KVM
* lock will not be taken .
*/
static inline void get_update_locks_for_mdev(struct ap_matrix_mdev *matrix_mdev)
{
mutex_lock(&matrix_dev->guests_lock);
if (matrix_mdev && matrix_mdev->kvm)
mutex_lock(&matrix_mdev->kvm->lock);
mutex_lock(&matrix_dev->mdevs_lock);
}
/**
* release_update_locks_for_mdev : Release the locks used to dynamically update a
* KVM guest ' s APCB in the proper order .
*
* @ matrix_mdev : a pointer to a struct ap_matrix_mdev object containing the AP
* configuration data to use to update a KVM guest ' s APCB .
*
* The proper unlocking order is :
* 1 . matrix_dev - > mdevs_lock
* 2 . matrix_mdev - > kvm - > lock
* 3 . matrix_dev - > guests_lock
*
* Note : If @ matrix_mdev is NULL or is not attached to a KVM guest , the KVM
* lock will not be released .
*/
static inline void release_update_locks_for_mdev(struct ap_matrix_mdev *matrix_mdev)
{
mutex_unlock(&matrix_dev->mdevs_lock);
if (matrix_mdev && matrix_mdev->kvm)
mutex_unlock(&matrix_mdev->kvm->lock);
mutex_unlock(&matrix_dev->guests_lock);
}
/**
* get_update_locks_by_apqn : Find the mdev to which an APQN is assigned and
* acquire the locks required to update the APCB of
* the KVM guest to which the mdev is attached .
*
* @ apqn : the APQN of a queue device .
*
* The proper locking order is :
* 1 . matrix_dev - > guests_lock : required to use the KVM pointer to update a KVM
* guest ' s APCB .
* 2 . matrix_mdev - > kvm - > lock : required to update a guest ' s APCB
* 3 . matrix_dev - > mdevs_lock : required to access data stored in a matrix_mdev
*
* Note : If @ apqn is not assigned to a matrix_mdev , the matrix_mdev - > kvm - > lock
* will not be taken .
*
* Return : the ap_matrix_mdev object to which @ apqn is assigned or NULL if @ apqn
* is not assigned to an ap_matrix_mdev .
*/
static struct ap_matrix_mdev *get_update_locks_by_apqn(int apqn)
{
struct ap_matrix_mdev *matrix_mdev;
mutex_lock(&matrix_dev->guests_lock);
list_for_each_entry(matrix_mdev, &matrix_dev->mdev_list, node) {
if (test_bit_inv(AP_QID_CARD(apqn), matrix_mdev->matrix.apm) &&
test_bit_inv(AP_QID_QUEUE(apqn), matrix_mdev->matrix.aqm)) {
if (matrix_mdev->kvm)
mutex_lock(&matrix_mdev->kvm->lock);
mutex_lock(&matrix_dev->mdevs_lock);
return matrix_mdev;
}
}
mutex_lock(&matrix_dev->mdevs_lock);
return NULL;
}
/**
* get_update_locks_for_queue : get the locks required to update the APCB of the
* KVM guest to which the matrix mdev linked to a
* vfio_ap_queue object is attached .
*
* @ q : a pointer to a vfio_ap_queue object .
*
* The proper locking order is :
* 1 . q - > matrix_dev - > guests_lock : required to use the KVM pointer to update a
* KVM guest ' s APCB .
* 2 . q - > matrix_mdev - > kvm - > lock : required to update a guest ' s APCB
* 3 . matrix_dev - > mdevs_lock : required to access data stored in matrix_mdev
*
* Note : if @ queue is not linked to an ap_matrix_mdev object , the KVM lock
* will not be taken .
*/
static inline void get_update_locks_for_queue(struct vfio_ap_queue *q)
{
mutex_lock(&matrix_dev->guests_lock);
if (q->matrix_mdev && q->matrix_mdev->kvm)
mutex_lock(&q->matrix_mdev->kvm->lock);
mutex_lock(&matrix_dev->mdevs_lock);
}
/**
* vfio_ap_mdev_get_queue - retrieve a queue with a specific APQN from a
* hash table of queues assigned to a matrix mdev
* @ matrix_mdev : the matrix mdev
* @ apqn : The APQN of a queue device
*
* Return : the pointer to the vfio_ap_queue struct representing the queue or
* NULL if the queue is not assigned to @ matrix_mdev
*/
static struct vfio_ap_queue *vfio_ap_mdev_get_queue(
struct ap_matrix_mdev *matrix_mdev,
int apqn)
{
struct vfio_ap_queue *q;
hash_for_each_possible(matrix_mdev->qtable.queues, q, mdev_qnode,
apqn) {
if (q && q->apqn == apqn)
return q;
}
return NULL;
}
/**
* vfio_ap_wait_for_irqclear - clears the IR bit or gives up after 5 tries
* @ apqn : The AP Queue number
*
* Checks the IRQ bit for the status of this APQN using ap_tapq .
* Returns if the ap_tapq function succeeded and the bit is clear .
* Returns if ap_tapq function failed with invalid , deconfigured or
* checkstopped AP .
* Otherwise retries up to 5 times after waiting 20 ms .
*/
static void vfio_ap_wait_for_irqclear(int apqn)
{
struct ap_queue_status status;
int retry = 5 ;
do {
status = ap_tapq(apqn, NULL);
switch (status.response_code) {
case AP_RESPONSE_NORMAL:
case AP_RESPONSE_RESET_IN_PROGRESS:
if (!status.irq_enabled)
return ;
fallthrough;
case AP_RESPONSE_BUSY:
msleep(20 );
break ;
case AP_RESPONSE_Q_NOT_AVAIL:
case AP_RESPONSE_DECONFIGURED:
case AP_RESPONSE_CHECKSTOPPED:
default :
WARN_ONCE(1 , "%s: tapq rc %02x: %04x\n" , __func__,
status.response_code, apqn);
return ;
}
} while (--retry);
WARN_ONCE(1 , "%s: tapq rc %02x: %04x could not clear IR bit\n" ,
__func__, status.response_code, apqn);
}
/**
* vfio_ap_free_aqic_resources - free vfio_ap_queue resources
* @ q : The vfio_ap_queue
*
* Unregisters the ISC in the GIB when the saved ISC not invalid .
* Unpins the guest ' s page holding the NIB when it exists .
* Resets the saved_iova and saved_isc to invalid values .
*/
static void vfio_ap_free_aqic_resources(struct vfio_ap_queue *q)
{
if (!q)
return ;
if (q->saved_isc != VFIO_AP_ISC_INVALID &&
!WARN_ON(!(q->matrix_mdev && q->matrix_mdev->kvm))) {
kvm_s390_gisc_unregister(q->matrix_mdev->kvm, q->saved_isc);
q->saved_isc = VFIO_AP_ISC_INVALID;
}
if (q->saved_iova && !WARN_ON(!q->matrix_mdev)) {
vfio_unpin_pages(&q->matrix_mdev->vdev, q->saved_iova, 1 );
q->saved_iova = 0 ;
}
}
/**
* vfio_ap_irq_disable - disables and clears an ap_queue interrupt
* @ q : The vfio_ap_queue
*
* Uses ap_aqic to disable the interruption and in case of success , reset
* in progress or IRQ disable command already proceeded : calls
* vfio_ap_wait_for_irqclear ( ) to check for the IRQ bit to be clear
* and calls vfio_ap_free_aqic_resources ( ) to free the resources associated
* with the AP interrupt handling .
*
* In the case the AP is busy , or a reset is in progress ,
* retries after 20 ms , up to 5 times .
*
* Returns if ap_aqic function failed with invalid , deconfigured or
* checkstopped AP .
*
* Return : & struct ap_queue_status
*/
static struct ap_queue_status vfio_ap_irq_disable(struct vfio_ap_queue *q)
{
union ap_qirq_ctrl aqic_gisa = { .value = 0 };
struct ap_queue_status status;
int retries = 5 ;
do {
status = ap_aqic(q->apqn, aqic_gisa, 0 );
switch (status.response_code) {
case AP_RESPONSE_OTHERWISE_CHANGED:
case AP_RESPONSE_NORMAL:
vfio_ap_wait_for_irqclear(q->apqn);
goto end_free;
case AP_RESPONSE_RESET_IN_PROGRESS:
case AP_RESPONSE_BUSY:
msleep(20 );
break ;
case AP_RESPONSE_Q_NOT_AVAIL:
case AP_RESPONSE_DECONFIGURED:
case AP_RESPONSE_CHECKSTOPPED:
case AP_RESPONSE_INVALID_ADDRESS:
default :
/* All cases in default means AP not operational */
WARN_ONCE(1 , "%s: ap_aqic status %d\n" , __func__,
status.response_code);
goto end_free;
}
} while (retries--);
WARN_ONCE(1 , "%s: ap_aqic status %d\n" , __func__,
status.response_code);
end_free:
vfio_ap_free_aqic_resources(q);
return status;
}
/**
* vfio_ap_validate_nib - validate a notification indicator byte ( nib ) address .
*
* @ vcpu : the object representing the vcpu executing the PQAP ( AQIC ) instruction .
* @ nib : the location for storing the nib address .
*
* When the PQAP ( AQIC ) instruction is executed , general register 2 contains the
* address of the notification indicator byte ( nib ) used for IRQ notification .
* This function parses and validates the nib from gr2 .
*
* Return : returns zero if the nib address is a valid ; otherwise , returns
* - EINVAL .
*/
static int vfio_ap_validate_nib(struct kvm_vcpu *vcpu, dma_addr_t *nib)
{
*nib = vcpu->run->s.regs.gprs[2 ];
if (!*nib)
return -EINVAL;
if (kvm_is_error_hva(gfn_to_hva(vcpu->kvm, *nib >> PAGE_SHIFT)))
return -EINVAL;
return 0 ;
}
/**
* ensure_nib_shared ( ) - Ensure the address of the NIB is secure and shared
* @ addr : the physical ( absolute ) address of the NIB
*
* This function checks whether the NIB page , which has been pinned with
* vfio_pin_pages ( ) , is a shared page belonging to a secure guest .
*
* It will call uv_pin_shared ( ) on it ; if the page was already pinned shared
* ( i . e . if the NIB belongs to a secure guest and is shared ) , then 0
* ( success ) is returned . If the NIB was not shared , vfio_pin_pages ( ) had
* exported it and now it does not belong to the secure guest anymore . In
* that case , an error is returned .
*
* Context : the NIB ( at physical address @ addr ) has to be pinned with
* vfio_pin_pages ( ) before calling this function .
*
* Return : 0 in case of success , otherwise an error < 0 .
*/
static int ensure_nib_shared(unsigned long addr)
{
/*
* The nib has to be located in shared storage since guest and
* host access it . vfio_pin_pages ( ) will do a pin shared and
* if that fails ( possibly because it ' s not a shared page ) it
* calls export . We try to do a second pin shared here so that
* the UV gives us an error code if we try to pin a non - shared
* page .
*
* If the page is already pinned shared the UV will return a success .
*/
return uv_pin_shared(addr);
}
/**
* vfio_ap_irq_enable - Enable Interruption for a APQN
*
* @ q : the vfio_ap_queue holding AQIC parameters
* @ isc : the guest ISC to register with the GIB interface
* @ vcpu : the vcpu object containing the registers specifying the parameters
* passed to the PQAP ( AQIC ) instruction .
*
* Pin the NIB saved in * q
* Register the guest ISC to GIB interface and retrieve the
* host ISC to issue the host side PQAP / AQIC
*
* status . response_code may be set to AP_RESPONSE_INVALID_ADDRESS in case the
* vfio_pin_pages or kvm_s390_gisc_register failed .
*
* Otherwise return the ap_queue_status returned by the ap_aqic ( ) ,
* all retry handling will be done by the guest .
*
* Return : & struct ap_queue_status
*/
static struct ap_queue_status vfio_ap_irq_enable(struct vfio_ap_queue *q,
int isc,
struct kvm_vcpu *vcpu)
{
union ap_qirq_ctrl aqic_gisa = { .value = 0 };
struct ap_queue_status status = {};
struct kvm_s390_gisa *gisa;
struct page *h_page;
int nisc;
struct kvm *kvm;
phys_addr_t h_nib;
dma_addr_t nib;
int ret;
/* Verify that the notification indicator byte address is valid */
if (vfio_ap_validate_nib(vcpu, &nib)) {
VFIO_AP_DBF_WARN("%s: invalid NIB address: nib=%pad, apqn=%#04x\n" ,
__func__, &nib, q->apqn);
status.response_code = AP_RESPONSE_INVALID_ADDRESS;
return status;
}
/* The pin will probably be successful even if the NIB was not shared */
ret = vfio_pin_pages(&q->matrix_mdev->vdev, nib, 1 ,
IOMMU_READ | IOMMU_WRITE, &h_page);
switch (ret) {
case 1 :
break ;
default :
VFIO_AP_DBF_WARN("%s: vfio_pin_pages failed: rc=%d,"
"nib=%pad, apqn=%#04x\n" ,
__func__, ret, &nib, q->apqn);
status.response_code = AP_RESPONSE_INVALID_ADDRESS;
return status;
}
kvm = q->matrix_mdev->kvm;
gisa = kvm->arch.gisa_int.origin;
h_nib = page_to_phys(h_page) | (nib & ~PAGE_MASK);
aqic_gisa.gisc = isc;
/* NIB in non-shared storage is a rc 6 for PV guests */
if (kvm_s390_pv_cpu_is_protected(vcpu) &&
ensure_nib_shared(h_nib & PAGE_MASK)) {
vfio_unpin_pages(&q->matrix_mdev->vdev, nib, 1 );
status.response_code = AP_RESPONSE_INVALID_ADDRESS;
return status;
}
nisc = kvm_s390_gisc_register(kvm, isc);
if (nisc < 0 ) {
VFIO_AP_DBF_WARN("%s: gisc registration failed: nisc=%d, isc=%d, apqn=%#04x\n" ,
__func__, nisc, isc, q->apqn);
vfio_unpin_pages(&q->matrix_mdev->vdev, nib, 1 );
status.response_code = AP_RESPONSE_INVALID_ADDRESS;
return status;
}
aqic_gisa.isc = nisc;
aqic_gisa.ir = 1 ;
aqic_gisa.gisa = virt_to_phys(gisa) >> 4 ;
status = ap_aqic(q->apqn, aqic_gisa, h_nib);
switch (status.response_code) {
case AP_RESPONSE_NORMAL:
/* See if we did clear older IRQ configuration */
vfio_ap_free_aqic_resources(q);
q->saved_iova = nib;
q->saved_isc = isc;
break ;
case AP_RESPONSE_OTHERWISE_CHANGED:
/* We could not modify IRQ settings: clear new configuration */
ret = kvm_s390_gisc_unregister(kvm, isc);
if (ret)
VFIO_AP_DBF_WARN("%s: kvm_s390_gisc_unregister: rc=%d isc=%d, apqn=%#04x\n" ,
__func__, ret, isc, q->apqn);
vfio_unpin_pages(&q->matrix_mdev->vdev, nib, 1 );
break ;
default :
pr_warn("%s: apqn %04x: response: %02x\n" , __func__, q->apqn,
status.response_code);
vfio_ap_irq_disable(q);
break ;
}
if (status.response_code != AP_RESPONSE_NORMAL) {
VFIO_AP_DBF_WARN("%s: PQAP(AQIC) failed with status=%#02x: "
"zone=%#x, ir=%#x, gisc=%#x, f=%#x,"
"gisa=%#x, isc=%#x, apqn=%#04x\n" ,
__func__, status.response_code,
aqic_gisa.zone, aqic_gisa.ir, aqic_gisa.gisc,
aqic_gisa.gf, aqic_gisa.gisa, aqic_gisa.isc,
q->apqn);
}
return status;
}
/**
* vfio_ap_le_guid_to_be_uuid - convert a little endian guid array into an array
* of big endian elements that can be passed by
* value to an s390dbf sprintf event function to
* format a UUID string .
*
* @ guid : the object containing the little endian guid
* @ uuid : a six - element array of long values that can be passed by value as
* arguments for a formatting string specifying a UUID .
*
* The S390 Debug Feature ( s390dbf ) allows the use of " % s " in the sprintf
* event functions if the memory for the passed string is available as long as
* the debug feature exists . Since a mediated device can be removed at any
* time , it ' s name can not be used because % s passes the reference to the string
* in memory and the reference will go stale once the device is removed .
*
* The s390dbf string formatting function allows a maximum of 9 arguments for a
* message to be displayed in the ' sprintf ' view . In order to use the bytes
* comprising the mediated device ' s UUID to display the mediated device name ,
* they will have to be converted into an array whose elements can be passed by
* value to sprintf . For example :
*
* guid array : { 83 , 78 , 17 , 62 , bb , f1 , f0 , 47 , 91 , 4 d , 32 , a2 , 2 e , 3 a , 88 , 04 }
* mdev name : 62177883 - f1bb - 47 f0 - 914 d - 32 a22e3a8804
* array returned : { 62177883 , f1bb , 47 f0 , 914 d , 32 a2 , 2 e3a8804 }
* formatting string : " % 08 lx - % 04 lx - % 04 lx - % 04 lx - % 02 lx % 04 lx "
*/
static void vfio_ap_le_guid_to_be_uuid(guid_t *guid, unsigned long *uuid)
{
/*
* The input guid is ordered in little endian , so it needs to be
* reordered for displaying a UUID as a string . This specifies the
* guid indices in proper order .
*/
uuid[0 ] = le32_to_cpup((__le32 *)guid);
uuid[1 ] = le16_to_cpup((__le16 *)&guid->b[4 ]);
uuid[2 ] = le16_to_cpup((__le16 *)&guid->b[6 ]);
uuid[3 ] = *((__u16 *)&guid->b[8 ]);
uuid[4 ] = *((__u16 *)&guid->b[10 ]);
uuid[5 ] = *((__u32 *)&guid->b[12 ]);
}
/**
* handle_pqap - PQAP instruction callback
*
* @ vcpu : The vcpu on which we received the PQAP instruction
*
* Get the general register contents to initialize internal variables .
* REG [ 0 ] : APQN
* REG [ 1 ] : IR and ISC
* REG [ 2 ] : NIB
*
* Response . status may be set to following Response Code :
* - AP_RESPONSE_Q_NOT_AVAIL : if the queue is not available
* - AP_RESPONSE_DECONFIGURED : if the queue is not configured
* - AP_RESPONSE_NORMAL ( 0 ) : in case of success
* Check vfio_ap_setirq ( ) and vfio_ap_clrirq ( ) for other possible RC .
* We take the matrix_dev lock to ensure serialization on queues and
* mediated device access .
*
* Return : 0 if we could handle the request inside KVM .
* Otherwise , returns - EOPNOTSUPP to let QEMU handle the fault .
*/
static int handle_pqap(struct kvm_vcpu *vcpu)
{
uint64_t status;
uint16_t apqn;
unsigned long uuid[6 ];
struct vfio_ap_queue *q;
struct ap_queue_status qstatus = {
.response_code = AP_RESPONSE_Q_NOT_AVAIL, };
struct ap_matrix_mdev *matrix_mdev;
apqn = vcpu->run->s.regs.gprs[0 ] & 0 xffff;
/* If we do not use the AIV facility just go to userland */
if (!(vcpu->arch.sie_block->eca & ECA_AIV)) {
VFIO_AP_DBF_WARN("%s: AIV facility not installed: apqn=0x%04x, eca=0x%04x\n" ,
__func__, apqn, vcpu->arch.sie_block->eca);
return -EOPNOTSUPP;
}
mutex_lock(&matrix_dev->mdevs_lock);
if (!vcpu->kvm->arch.crypto.pqap_hook) {
VFIO_AP_DBF_WARN("%s: PQAP(AQIC) hook not registered with the vfio_ap driver: apqn=0x%04x\n" ,
__func__, apqn);
goto out_unlock;
}
matrix_mdev = container_of(vcpu->kvm->arch.crypto.pqap_hook,
struct ap_matrix_mdev, pqap_hook);
/* If the there is no guest using the mdev, there is nothing to do */
if (!matrix_mdev->kvm) {
vfio_ap_le_guid_to_be_uuid(&matrix_mdev->mdev->uuid, uuid);
VFIO_AP_DBF_WARN("%s: mdev %08lx-%04lx-%04lx-%04lx-%04lx%08lx not in use: apqn=0x%04x\n" ,
__func__, uuid[0 ], uuid[1 ], uuid[2 ],
uuid[3 ], uuid[4 ], uuid[5 ], apqn);
goto out_unlock;
}
q = vfio_ap_mdev_get_queue(matrix_mdev, apqn);
if (!q) {
VFIO_AP_DBF_WARN("%s: Queue %02x.%04x not bound to the vfio_ap driver\n" ,
__func__, AP_QID_CARD(apqn),
AP_QID_QUEUE(apqn));
goto out_unlock;
}
status = vcpu->run->s.regs.gprs[1 ];
/* If IR bit(16) is set we enable the interrupt */
if ((status >> (63 - 16 )) & 0 x01)
qstatus = vfio_ap_irq_enable(q, status & 0 x07, vcpu);
else
qstatus = vfio_ap_irq_disable(q);
out_unlock:
memcpy(&vcpu->run->s.regs.gprs[1 ], &qstatus, sizeof (qstatus));
vcpu->run->s.regs.gprs[1 ] >>= 32 ;
mutex_unlock(&matrix_dev->mdevs_lock);
return 0 ;
}
static void vfio_ap_matrix_init(struct ap_config_info *info,
struct ap_matrix *matrix)
{
matrix->apm_max = info->apxa ? info->na : 63 ;
matrix->aqm_max = info->apxa ? info->nd : 15 ;
matrix->adm_max = info->apxa ? info->nd : 15 ;
}
static void signal_guest_ap_cfg_changed(struct ap_matrix_mdev *matrix_mdev)
{
if (matrix_mdev->cfg_chg_trigger)
eventfd_signal(matrix_mdev->cfg_chg_trigger);
}
static void vfio_ap_mdev_update_guest_apcb(struct ap_matrix_mdev *matrix_mdev)
{
if (matrix_mdev->kvm) {
kvm_arch_crypto_set_masks(matrix_mdev->kvm,
matrix_mdev->shadow_apcb.apm,
matrix_mdev->shadow_apcb.aqm,
matrix_mdev->shadow_apcb.adm);
signal_guest_ap_cfg_changed(matrix_mdev);
}
}
static bool vfio_ap_mdev_filter_cdoms(struct ap_matrix_mdev *matrix_mdev)
{
DECLARE_BITMAP(prev_shadow_adm, AP_DOMAINS);
bitmap_copy(prev_shadow_adm, matrix_mdev->shadow_apcb.adm, AP_DOMAINS);
bitmap_and(matrix_mdev->shadow_apcb.adm, matrix_mdev->matrix.adm,
(unsigned long *)matrix_dev->info.adm, AP_DOMAINS);
return !bitmap_equal(prev_shadow_adm, matrix_mdev->shadow_apcb.adm,
AP_DOMAINS);
}
static bool _queue_passable(struct vfio_ap_queue *q)
{
if (!q)
return false ;
switch (q->reset_status.response_code) {
case AP_RESPONSE_NORMAL:
case AP_RESPONSE_DECONFIGURED:
case AP_RESPONSE_CHECKSTOPPED:
return true ;
default :
return false ;
}
}
/*
* vfio_ap_mdev_filter_matrix - filter the APQNs assigned to the matrix mdev
* to ensure no queue devices are passed through to
* the guest that are not bound to the vfio_ap
* device driver .
*
* @ matrix_mdev : the matrix mdev whose matrix is to be filtered .
* @ apm_filtered : a 256 - bit bitmap for storing the APIDs filtered from the
* guest ' s AP configuration that are still in the host ' s AP
* configuration .
*
* Note : If an APQN referencing a queue device that is not bound to the vfio_ap
* driver , its APID will be filtered from the guest ' s APCB . The matrix
* structure precludes filtering an individual APQN , so its APID will be
* filtered . Consequently , all queues associated with the adapter that
* are in the host ' s AP configuration must be reset . If queues are
* subsequently made available again to the guest , they should re - appear
* in a reset state
*
* Return : a boolean value indicating whether the KVM guest ' s APCB was changed
* by the filtering or not .
*/
static bool vfio_ap_mdev_filter_matrix(struct ap_matrix_mdev *matrix_mdev,
unsigned long *apm_filtered)
{
unsigned long apid, apqi, apqn;
DECLARE_BITMAP(prev_shadow_apm, AP_DEVICES);
DECLARE_BITMAP(prev_shadow_aqm, AP_DOMAINS);
bitmap_copy(prev_shadow_apm, matrix_mdev->shadow_apcb.apm, AP_DEVICES);
bitmap_copy(prev_shadow_aqm, matrix_mdev->shadow_apcb.aqm, AP_DOMAINS);
vfio_ap_matrix_init(&matrix_dev->info, &matrix_mdev->shadow_apcb);
bitmap_clear(apm_filtered, 0 , AP_DEVICES);
/*
* Copy the adapters , domains and control domains to the shadow_apcb
* from the matrix mdev , but only those that are assigned to the host ' s
* AP configuration .
*/
bitmap_and(matrix_mdev->shadow_apcb.apm, matrix_mdev->matrix.apm,
(unsigned long *)matrix_dev->info.apm, AP_DEVICES);
bitmap_and(matrix_mdev->shadow_apcb.aqm, matrix_mdev->matrix.aqm,
(unsigned long *)matrix_dev->info.aqm, AP_DOMAINS);
for_each_set_bit_inv(apid, matrix_mdev->shadow_apcb.apm, AP_DEVICES) {
for_each_set_bit_inv(apqi, matrix_mdev->shadow_apcb.aqm,
AP_DOMAINS) {
/*
* If the APQN is not bound to the vfio_ap device
* driver , then we can ' t assign it to the guest ' s
* AP configuration . The AP architecture won ' t
* allow filtering of a single APQN , so let ' s filter
* the APID since an adapter represents a physical
* hardware device .
*/
apqn = AP_MKQID(apid, apqi);
if (!_queue_passable(vfio_ap_mdev_get_queue(matrix_mdev, apqn))) {
clear_bit_inv(apid, matrix_mdev->shadow_apcb.apm);
/*
* If the adapter was previously plugged into
* the guest , let ' s let the caller know that
* the APID was filtered .
*/
if (test_bit_inv(apid, prev_shadow_apm))
set_bit_inv(apid, apm_filtered);
break ;
}
}
}
return !bitmap_equal(prev_shadow_apm, matrix_mdev->shadow_apcb.apm,
AP_DEVICES) ||
!bitmap_equal(prev_shadow_aqm, matrix_mdev->shadow_apcb.aqm,
AP_DOMAINS);
}
static int vfio_ap_mdev_init_dev(struct vfio_device *vdev)
{
struct ap_matrix_mdev *matrix_mdev =
container_of(vdev, struct ap_matrix_mdev, vdev);
matrix_mdev->mdev = to_mdev_device(vdev->dev);
vfio_ap_matrix_init(&matrix_dev->info, &matrix_mdev->matrix);
matrix_mdev->pqap_hook = handle_pqap;
vfio_ap_matrix_init(&matrix_dev->info, &matrix_mdev->shadow_apcb);
hash_init(matrix_mdev->qtable.queues);
return 0 ;
}
static int vfio_ap_mdev_probe(struct mdev_device *mdev)
{
struct ap_matrix_mdev *matrix_mdev;
int ret;
matrix_mdev = vfio_alloc_device(ap_matrix_mdev, vdev, &mdev->dev,
&vfio_ap_matrix_dev_ops);
if (IS_ERR(matrix_mdev))
return PTR_ERR(matrix_mdev);
ret = vfio_register_emulated_iommu_dev(&matrix_mdev->vdev);
if (ret)
goto err_put_vdev;
matrix_mdev->req_trigger = NULL;
matrix_mdev->cfg_chg_trigger = NULL;
dev_set_drvdata(&mdev->dev, matrix_mdev);
mutex_lock(&matrix_dev->mdevs_lock);
list_add(&matrix_mdev->node, &matrix_dev->mdev_list);
mutex_unlock(&matrix_dev->mdevs_lock);
return 0 ;
err_put_vdev:
vfio_put_device(&matrix_mdev->vdev);
return ret;
}
static void vfio_ap_mdev_link_queue(struct ap_matrix_mdev *matrix_mdev,
struct vfio_ap_queue *q)
{
if (!q || vfio_ap_mdev_get_queue(matrix_mdev, q->apqn))
return ;
q->matrix_mdev = matrix_mdev;
hash_add(matrix_mdev->qtable.queues, &q->mdev_qnode, q->apqn);
}
static void vfio_ap_mdev_link_apqn(struct ap_matrix_mdev *matrix_mdev, int apqn)
{
struct vfio_ap_queue *q;
q = vfio_ap_find_queue(apqn);
vfio_ap_mdev_link_queue(matrix_mdev, q);
}
static void vfio_ap_unlink_queue_fr_mdev(struct vfio_ap_queue *q)
{
hash_del(&q->mdev_qnode);
}
static void vfio_ap_unlink_mdev_fr_queue(struct vfio_ap_queue *q)
{
q->matrix_mdev = NULL;
}
static void vfio_ap_mdev_unlink_fr_queues(struct ap_matrix_mdev *matrix_mdev)
{
struct vfio_ap_queue *q;
unsigned long apid, apqi;
for_each_set_bit_inv(apid, matrix_mdev->matrix.apm, AP_DEVICES) {
for_each_set_bit_inv(apqi, matrix_mdev->matrix.aqm,
AP_DOMAINS) {
q = vfio_ap_mdev_get_queue(matrix_mdev,
AP_MKQID(apid, apqi));
if (q)
q->matrix_mdev = NULL;
}
}
}
static void vfio_ap_mdev_remove(struct mdev_device *mdev)
{
struct ap_matrix_mdev *matrix_mdev = dev_get_drvdata(&mdev->dev);
vfio_unregister_group_dev(&matrix_mdev->vdev);
mutex_lock(&matrix_dev->guests_lock);
mutex_lock(&matrix_dev->mdevs_lock);
vfio_ap_mdev_reset_queues(matrix_mdev);
vfio_ap_mdev_unlink_fr_queues(matrix_mdev);
list_del(&matrix_mdev->node);
mutex_unlock(&matrix_dev->mdevs_lock);
mutex_unlock(&matrix_dev->guests_lock);
vfio_put_device(&matrix_mdev->vdev);
}
#define MDEV_SHARING_ERR "Userspace may not assign queue %02lx.%04lx to mdev: already assigned to %s"
#define MDEV_IN_USE_ERR "Can not reserve queue %02lx.%04lx for host driver: in use by mdev"
static void vfio_ap_mdev_log_sharing_err(struct ap_matrix_mdev *assignee,
struct ap_matrix_mdev *assigned_to,
unsigned long *apm, unsigned long *aqm)
{
unsigned long apid, apqi;
for_each_set_bit_inv(apid, apm, AP_DEVICES) {
for_each_set_bit_inv(apqi, aqm, AP_DOMAINS) {
dev_warn(mdev_dev(assignee->mdev), MDEV_SHARING_ERR,
apid, apqi, dev_name(mdev_dev(assigned_to->mdev)));
}
}
}
static void vfio_ap_mdev_log_in_use_err(struct ap_matrix_mdev *assignee,
unsigned long *apm, unsigned long *aqm)
{
unsigned long apid, apqi;
for_each_set_bit_inv(apid, apm, AP_DEVICES) {
for_each_set_bit_inv(apqi, aqm, AP_DOMAINS)
dev_warn(mdev_dev(assignee->mdev), MDEV_IN_USE_ERR, apid, apqi);
}
}
/**
* vfio_ap_mdev_verify_no_sharing - verify APQNs are not shared by matrix mdevs
*
* @ assignee : the matrix mdev to which @ mdev_apm and @ mdev_aqm are being
* assigned ; or , NULL if this function was called by the AP bus
* driver in_use callback to verify none of the APQNs being reserved
* for the host device driver are in use by a vfio_ap mediated device
* @ mdev_apm : mask indicating the APIDs of the APQNs to be verified
* @ mdev_aqm : mask indicating the APQIs of the APQNs to be verified
*
* Verifies that each APQN derived from the Cartesian product of APIDs
* represented by the bits set in @ mdev_apm and the APQIs of the bits set in
* @ mdev_aqm is not assigned to a mediated device other than the mdev to which
* the APQN is being assigned ( @ assignee ) . AP queue sharing is not allowed .
*
* Return : 0 if the APQNs are not shared ; otherwise return - EADDRINUSE .
*/
static int vfio_ap_mdev_verify_no_sharing(struct ap_matrix_mdev *assignee,
unsigned long *mdev_apm,
unsigned long *mdev_aqm)
{
struct ap_matrix_mdev *assigned_to;
DECLARE_BITMAP(apm, AP_DEVICES);
DECLARE_BITMAP(aqm, AP_DOMAINS);
list_for_each_entry(assigned_to, &matrix_dev->mdev_list, node) {
/*
* If the mdev to which the mdev_apm and mdev_aqm is being
* assigned is the same as the mdev being verified
*/
if (assignee == assigned_to)
continue ;
memset(apm, 0 , sizeof (apm));
memset(aqm, 0 , sizeof (aqm));
/*
* We work on full longs , as we can only exclude the leftover
* bits in non - inverse order . The leftover is all zeros .
*/
if (!bitmap_and(apm, mdev_apm, assigned_to->matrix.apm, AP_DEVICES))
continue ;
if (!bitmap_and(aqm, mdev_aqm, assigned_to->matrix.aqm, AP_DOMAINS))
continue ;
if (assignee)
vfio_ap_mdev_log_sharing_err(assignee, assigned_to, apm, aqm);
else
vfio_ap_mdev_log_in_use_err(assigned_to, apm, aqm);
return -EADDRINUSE;
}
return 0 ;
}
/**
* vfio_ap_mdev_validate_masks - verify that the APQNs assigned to the mdev are
* not reserved for the default zcrypt driver and
* are not assigned to another mdev .
*
* @ matrix_mdev : the mdev to which the APQNs being validated are assigned .
*
* Return : One of the following values :
* o the error returned from the ap_apqn_in_matrix_owned_by_def_drv ( ) function ,
* most likely - EBUSY indicating the ap_perms_mutex lock is already held .
* o EADDRNOTAVAIL if an APQN assigned to @ matrix_mdev is reserved for the
* zcrypt default driver .
* o EADDRINUSE if an APQN assigned to @ matrix_mdev is assigned to another mdev
* o A zero indicating validation succeeded .
*/
static int vfio_ap_mdev_validate_masks(struct ap_matrix_mdev *matrix_mdev)
{
if (ap_apqn_in_matrix_owned_by_def_drv(matrix_mdev->matrix.apm,
matrix_mdev->matrix.aqm))
return -EADDRNOTAVAIL;
return vfio_ap_mdev_verify_no_sharing(matrix_mdev,
matrix_mdev->matrix.apm,
matrix_mdev->matrix.aqm);
}
static void vfio_ap_mdev_link_adapter(struct ap_matrix_mdev *matrix_mdev,
unsigned long apid)
{
unsigned long apqi;
for_each_set_bit_inv(apqi, matrix_mdev->matrix.aqm, AP_DOMAINS)
vfio_ap_mdev_link_apqn(matrix_mdev,
AP_MKQID(apid, apqi));
}
static void collect_queues_to_reset(struct ap_matrix_mdev *matrix_mdev,
unsigned long apid,
struct list_head *qlist)
{
struct vfio_ap_queue *q;
unsigned long apqi;
for_each_set_bit_inv(apqi, matrix_mdev->shadow_apcb.aqm, AP_DOMAINS) {
q = vfio_ap_mdev_get_queue(matrix_mdev, AP_MKQID(apid, apqi));
if (q)
list_add_tail(&q->reset_qnode, qlist);
}
}
static void reset_queues_for_apid(struct ap_matrix_mdev *matrix_mdev,
unsigned long apid)
{
struct list_head qlist;
INIT_LIST_HEAD(&qlist);
collect_queues_to_reset(matrix_mdev, apid, &qlist);
vfio_ap_mdev_reset_qlist(&qlist);
}
static int reset_queues_for_apids(struct ap_matrix_mdev *matrix_mdev,
unsigned long *apm_reset)
{
struct list_head qlist;
unsigned long apid;
if (bitmap_empty(apm_reset, AP_DEVICES))
return 0 ;
INIT_LIST_HEAD(&qlist);
for_each_set_bit_inv(apid, apm_reset, AP_DEVICES)
collect_queues_to_reset(matrix_mdev, apid, &qlist);
return vfio_ap_mdev_reset_qlist(&qlist);
}
/**
* assign_adapter_store - parses the APID from @ buf and sets the
* corresponding bit in the mediated matrix device ' s APM
*
* @ dev : the matrix device
* @ attr : the mediated matrix device ' s assign_adapter attribute
* @ buf : a buffer containing the AP adapter number ( APID ) to
* be assigned
* @ count : the number of bytes in @ buf
*
* Return : the number of bytes processed if the APID is valid ; otherwise ,
* returns one of the following errors :
*
* 1 . - EINVAL
* The APID is not a valid number
*
* 2 . - ENODEV
* The APID exceeds the maximum value configured for the system
*
* 3 . - EADDRNOTAVAIL
* An APQN derived from the cross product of the APID being assigned
* and the APQIs previously assigned is not bound to the vfio_ap device
* driver ; or , if no APQIs have yet been assigned , the APID is not
* contained in an APQN bound to the vfio_ap device driver .
*
* 4 . - EADDRINUSE
* An APQN derived from the cross product of the APID being assigned
* and the APQIs previously assigned is being used by another mediated
* matrix device
*
* 5 . - EAGAIN
* A lock required to validate the mdev ' s AP configuration could not
* be obtained .
*/
static ssize_t assign_adapter_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
int ret;
unsigned long apid;
DECLARE_BITMAP(apm_filtered, AP_DEVICES);
struct ap_matrix_mdev *matrix_mdev = dev_get_drvdata(dev);
mutex_lock(&ap_perms_mutex);
get_update_locks_for_mdev(matrix_mdev);
ret = kstrtoul(buf, 0 , &apid);
if (ret)
goto done;
if (apid > matrix_mdev->matrix.apm_max) {
ret = -ENODEV;
goto done;
}
if (test_bit_inv(apid, matrix_mdev->matrix.apm)) {
ret = count;
goto done;
}
set_bit_inv(apid, matrix_mdev->matrix.apm);
ret = vfio_ap_mdev_validate_masks(matrix_mdev);
if (ret) {
clear_bit_inv(apid, matrix_mdev->matrix.apm);
goto done;
}
vfio_ap_mdev_link_adapter(matrix_mdev, apid);
if (vfio_ap_mdev_filter_matrix(matrix_mdev, apm_filtered)) {
vfio_ap_mdev_update_guest_apcb(matrix_mdev);
reset_queues_for_apids(matrix_mdev, apm_filtered);
}
ret = count;
done:
release_update_locks_for_mdev(matrix_mdev);
mutex_unlock(&ap_perms_mutex);
return ret;
}
static DEVICE_ATTR_WO(assign_adapter);
static struct vfio_ap_queue
*vfio_ap_unlink_apqn_fr_mdev(struct ap_matrix_mdev *matrix_mdev,
unsigned long apid, unsigned long apqi)
{
struct vfio_ap_queue *q = NULL;
q = vfio_ap_mdev_get_queue(matrix_mdev, AP_MKQID(apid, apqi));
/* If the queue is assigned to the matrix mdev, unlink it. */
if (q)
vfio_ap_unlink_queue_fr_mdev(q);
return q;
}
/**
* vfio_ap_mdev_unlink_adapter - unlink all queues associated with unassigned
* adapter from the matrix mdev to which the
* adapter was assigned .
* @ matrix_mdev : the matrix mediated device to which the adapter was assigned .
* @ apid : the APID of the unassigned adapter .
* @ qlist : list for storing queues associated with unassigned adapter that
* need to be reset .
*/
static void vfio_ap_mdev_unlink_adapter(struct ap_matrix_mdev *matrix_mdev,
unsigned long apid,
struct list_head *qlist)
{
unsigned long apqi;
struct vfio_ap_queue *q;
for_each_set_bit_inv(apqi, matrix_mdev->matrix.aqm, AP_DOMAINS) {
q = vfio_ap_unlink_apqn_fr_mdev(matrix_mdev, apid, apqi);
if (q && qlist) {
if (test_bit_inv(apid, matrix_mdev->shadow_apcb.apm) &&
test_bit_inv(apqi, matrix_mdev->shadow_apcb.aqm))
list_add_tail(&q->reset_qnode, qlist);
}
}
}
static void vfio_ap_mdev_hot_unplug_adapters(struct ap_matrix_mdev *matrix_mdev,
unsigned long *apids)
{
struct vfio_ap_queue *q, *tmpq;
struct list_head qlist;
unsigned long apid;
bool apcb_update = false ;
INIT_LIST_HEAD(&qlist);
for_each_set_bit_inv(apid, apids, AP_DEVICES) {
vfio_ap_mdev_unlink_adapter(matrix_mdev, apid, &qlist);
if (test_bit_inv(apid, matrix_mdev->shadow_apcb.apm)) {
clear_bit_inv(apid, matrix_mdev->shadow_apcb.apm);
apcb_update = true ;
}
}
/* Only update apcb if needed to avoid impacting guest */
if (apcb_update)
vfio_ap_mdev_update_guest_apcb(matrix_mdev);
vfio_ap_mdev_reset_qlist(&qlist);
list_for_each_entry_safe(q, tmpq, &qlist, reset_qnode) {
vfio_ap_unlink_mdev_fr_queue(q);
list_del(&q->reset_qnode);
}
}
static void vfio_ap_mdev_hot_unplug_adapter(struct ap_matrix_mdev *matrix_mdev,
unsigned long apid)
{
DECLARE_BITMAP(apids, AP_DEVICES);
bitmap_zero(apids, AP_DEVICES);
set_bit_inv(apid, apids);
vfio_ap_mdev_hot_unplug_adapters(matrix_mdev, apids);
}
/**
* unassign_adapter_store - parses the APID from @ buf and clears the
* corresponding bit in the mediated matrix device ' s APM
*
* @ dev : the matrix device
* @ attr : the mediated matrix device ' s unassign_adapter attribute
* @ buf : a buffer containing the adapter number ( APID ) to be unassigned
* @ count : the number of bytes in @ buf
*
* Return : the number of bytes processed if the APID is valid ; otherwise ,
* returns one of the following errors :
* - EINVAL if the APID is not a number
* - ENODEV if the APID it exceeds the maximum value configured for the
* system
*/
static ssize_t unassign_adapter_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
int ret;
unsigned long apid;
struct ap_matrix_mdev *matrix_mdev = dev_get_drvdata(dev);
get_update_locks_for_mdev(matrix_mdev);
ret = kstrtoul(buf, 0 , &apid);
if (ret)
goto done;
if (apid > matrix_mdev->matrix.apm_max) {
ret = -ENODEV;
goto done;
}
if (!test_bit_inv(apid, matrix_mdev->matrix.apm)) {
ret = count;
goto done;
}
clear_bit_inv((unsigned long )apid, matrix_mdev->matrix.apm);
vfio_ap_mdev_hot_unplug_adapter(matrix_mdev, apid);
ret = count;
done:
release_update_locks_for_mdev(matrix_mdev);
return ret;
}
static DEVICE_ATTR_WO(unassign_adapter);
static void vfio_ap_mdev_link_domain(struct ap_matrix_mdev *matrix_mdev,
unsigned long apqi)
{
unsigned long apid;
for_each_set_bit_inv(apid, matrix_mdev->matrix.apm, AP_DEVICES)
vfio_ap_mdev_link_apqn(matrix_mdev,
AP_MKQID(apid, apqi));
}
/**
* assign_domain_store - parses the APQI from @ buf and sets the
* corresponding bit in the mediated matrix device ' s AQM
*
* @ dev : the matrix device
* @ attr : the mediated matrix device ' s assign_domain attribute
* @ buf : a buffer containing the AP queue index ( APQI ) of the domain to
* be assigned
* @ count : the number of bytes in @ buf
*
* Return : the number of bytes processed if the APQI is valid ; otherwise returns
* one of the following errors :
*
* 1 . - EINVAL
* The APQI is not a valid number
*
* 2 . - ENODEV
* The APQI exceeds the maximum value configured for the system
*
* 3 . - EADDRNOTAVAIL
* An APQN derived from the cross product of the APQI being assigned
* and the APIDs previously assigned is not bound to the vfio_ap device
* driver ; or , if no APIDs have yet been assigned , the APQI is not
* contained in an APQN bound to the vfio_ap device driver .
*
* 4 . - EADDRINUSE
* An APQN derived from the cross product of the APQI being assigned
* and the APIDs previously assigned is being used by another mediated
* matrix device
*
* 5 . - EAGAIN
* The lock required to validate the mdev ' s AP configuration could not
* be obtained .
*/
static ssize_t assign_domain_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
int ret;
unsigned long apqi;
DECLARE_BITMAP(apm_filtered, AP_DEVICES);
struct ap_matrix_mdev *matrix_mdev = dev_get_drvdata(dev);
mutex_lock(&ap_perms_mutex);
get_update_locks_for_mdev(matrix_mdev);
ret = kstrtoul(buf, 0 , &apqi);
if (ret)
goto done;
if (apqi > matrix_mdev->matrix.aqm_max) {
ret = -ENODEV;
goto done;
}
if (test_bit_inv(apqi, matrix_mdev->matrix.aqm)) {
ret = count;
goto done;
}
set_bit_inv(apqi, matrix_mdev->matrix.aqm);
ret = vfio_ap_mdev_validate_masks(matrix_mdev);
if (ret) {
clear_bit_inv(apqi, matrix_mdev->matrix.aqm);
goto done;
}
vfio_ap_mdev_link_domain(matrix_mdev, apqi);
if (vfio_ap_mdev_filter_matrix(matrix_mdev, apm_filtered)) {
vfio_ap_mdev_update_guest_apcb(matrix_mdev);
reset_queues_for_apids(matrix_mdev, apm_filtered);
}
ret = count;
done:
release_update_locks_for_mdev(matrix_mdev);
mutex_unlock(&ap_perms_mutex);
return ret;
}
static DEVICE_ATTR_WO(assign_domain);
static void vfio_ap_mdev_unlink_domain(struct ap_matrix_mdev *matrix_mdev,
unsigned long apqi,
struct list_head *qlist)
{
unsigned long apid;
struct vfio_ap_queue *q;
for_each_set_bit_inv(apid, matrix_mdev->matrix.apm, AP_DEVICES) {
q = vfio_ap_unlink_apqn_fr_mdev(matrix_mdev, apid, apqi);
if (q && qlist) {
if (test_bit_inv(apid, matrix_mdev->shadow_apcb.apm) &&
test_bit_inv(apqi, matrix_mdev->shadow_apcb.aqm))
list_add_tail(&q->reset_qnode, qlist);
}
}
}
static void vfio_ap_mdev_hot_unplug_domains(struct ap_matrix_mdev *matrix_mdev,
unsigned long *apqis)
{
struct vfio_ap_queue *q, *tmpq;
struct list_head qlist;
unsigned long apqi;
bool apcb_update = false ;
INIT_LIST_HEAD(&qlist);
for_each_set_bit_inv(apqi, apqis, AP_DOMAINS) {
vfio_ap_mdev_unlink_domain(matrix_mdev, apqi, &qlist);
if (test_bit_inv(apqi, matrix_mdev->shadow_apcb.aqm)) {
clear_bit_inv(apqi, matrix_mdev->shadow_apcb.aqm);
apcb_update = true ;
}
}
/* Only update apcb if needed to avoid impacting guest */
if (apcb_update)
vfio_ap_mdev_update_guest_apcb(matrix_mdev);
vfio_ap_mdev_reset_qlist(&qlist);
list_for_each_entry_safe(q, tmpq, &qlist, reset_qnode) {
vfio_ap_unlink_mdev_fr_queue(q);
list_del(&q->reset_qnode);
}
}
static void vfio_ap_mdev_hot_unplug_domain(struct ap_matrix_mdev *matrix_mdev,
unsigned long apqi)
{
DECLARE_BITMAP(apqis, AP_DOMAINS);
bitmap_zero(apqis, AP_DEVICES);
set_bit_inv(apqi, apqis);
vfio_ap_mdev_hot_unplug_domains(matrix_mdev, apqis);
}
/**
* unassign_domain_store - parses the APQI from @ buf and clears the
* corresponding bit in the mediated matrix device ' s AQM
*
* @ dev : the matrix device
* @ attr : the mediated matrix device ' s unassign_domain attribute
* @ buf : a buffer containing the AP queue index ( APQI ) of the domain to
* be unassigned
* @ count : the number of bytes in @ buf
*
* Return : the number of bytes processed if the APQI is valid ; otherwise ,
* returns one of the following errors :
* - EINVAL if the APQI is not a number
* - ENODEV if the APQI exceeds the maximum value configured for the system
*/
static ssize_t unassign_domain_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
int ret;
unsigned long apqi;
struct ap_matrix_mdev *matrix_mdev = dev_get_drvdata(dev);
get_update_locks_for_mdev(matrix_mdev);
ret = kstrtoul(buf, 0 , &apqi);
if (ret)
goto done;
if (apqi > matrix_mdev->matrix.aqm_max) {
ret = -ENODEV;
goto done;
}
if (!test_bit_inv(apqi, matrix_mdev->matrix.aqm)) {
ret = count;
goto done;
}
clear_bit_inv((unsigned long )apqi, matrix_mdev->matrix.aqm);
vfio_ap_mdev_hot_unplug_domain(matrix_mdev, apqi);
ret = count;
done:
release_update_locks_for_mdev(matrix_mdev);
return ret;
}
static DEVICE_ATTR_WO(unassign_domain);
/**
* assign_control_domain_store - parses the domain ID from @ buf and sets
* the corresponding bit in the mediated matrix device ' s ADM
*
* @ dev : the matrix device
* @ attr : the mediated matrix device ' s assign_control_domain attribute
* @ buf : a buffer containing the domain ID to be assigned
* @ count : the number of bytes in @ buf
*
* Return : the number of bytes processed if the domain ID is valid ; otherwise ,
* returns one of the following errors :
* - EINVAL if the ID is not a number
* - ENODEV if the ID exceeds the maximum value configured for the system
*/
static ssize_t assign_control_domain_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
int ret;
unsigned long id;
struct ap_matrix_mdev *matrix_mdev = dev_get_drvdata(dev);
get_update_locks_for_mdev(matrix_mdev);
ret = kstrtoul(buf, 0 , &id);
if (ret)
goto done;
if (id > matrix_mdev->matrix.adm_max) {
ret = -ENODEV;
goto done;
}
if (test_bit_inv(id, matrix_mdev->matrix.adm)) {
ret = count;
goto done;
}
/* Set the bit in the ADM (bitmask) corresponding to the AP control
* domain number ( id ) . The bits in the mask , from most significant to
* least significant , correspond to IDs 0 up to the one less than the
* number of control domains that can be assigned .
*/
set_bit_inv(id, matrix_mdev->matrix.adm);
if (vfio_ap_mdev_filter_cdoms(matrix_mdev))
vfio_ap_mdev_update_guest_apcb(matrix_mdev);
ret = count;
done:
release_update_locks_for_mdev(matrix_mdev);
return ret;
}
static DEVICE_ATTR_WO(assign_control_domain);
/**
* unassign_control_domain_store - parses the domain ID from @ buf and
* clears the corresponding bit in the mediated matrix device ' s ADM
*
* @ dev : the matrix device
* @ attr : the mediated matrix device ' s unassign_control_domain attribute
* @ buf : a buffer containing the domain ID to be unassigned
* @ count : the number of bytes in @ buf
*
* Return : the number of bytes processed if the domain ID is valid ; otherwise ,
* returns one of the following errors :
* - EINVAL if the ID is not a number
* - ENODEV if the ID exceeds the maximum value configured for the system
*/
static ssize_t unassign_control_domain_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
int ret;
unsigned long domid;
struct ap_matrix_mdev *matrix_mdev = dev_get_drvdata(dev);
get_update_locks_for_mdev(matrix_mdev);
ret = kstrtoul(buf, 0 , &domid);
if (ret)
goto done;
if (domid > matrix_mdev->matrix.adm_max) {
ret = -ENODEV;
goto done;
}
if (!test_bit_inv(domid, matrix_mdev->matrix.adm)) {
ret = count;
goto done;
}
clear_bit_inv(domid, matrix_mdev->matrix.adm);
if (test_bit_inv(domid, matrix_mdev->shadow_apcb.adm)) {
clear_bit_inv(domid, matrix_mdev->shadow_apcb.adm);
vfio_ap_mdev_update_guest_apcb(matrix_mdev);
}
ret = count;
done:
release_update_locks_for_mdev(matrix_mdev);
return ret;
}
static DEVICE_ATTR_WO(unassign_control_domain);
static ssize_t control_domains_show(struct device *dev,
struct device_attribute *dev_attr,
char *buf)
{
unsigned long id;
struct ap_matrix_mdev *matrix_mdev = dev_get_drvdata(dev);
unsigned long max_domid = matrix_mdev->matrix.adm_max;
int nchars = 0 ;
mutex_lock(&matrix_dev->mdevs_lock);
for_each_set_bit_inv(id, matrix_mdev->matrix.adm, max_domid + 1 )
nchars += sysfs_emit_at(buf, nchars, "%04lx\n" , id);
mutex_unlock(&matrix_dev->mdevs_lock);
return nchars;
}
static DEVICE_ATTR_RO(control_domains);
static ssize_t vfio_ap_mdev_matrix_show(struct ap_matrix *matrix, char *buf)
{
unsigned long apid;
unsigned long apqi;
unsigned long apid1;
unsigned long apqi1;
unsigned long napm_bits = matrix->apm_max + 1 ;
unsigned long naqm_bits = matrix->aqm_max + 1 ;
int nchars = 0 ;
apid1 = find_first_bit_inv(matrix->apm, napm_bits);
apqi1 = find_first_bit_inv(matrix->aqm, naqm_bits);
if ((apid1 < napm_bits) && (apqi1 < naqm_bits)) {
for_each_set_bit_inv(apid, matrix->apm, napm_bits) {
for_each_set_bit_inv(apqi, matrix->aqm, naqm_bits)
nchars += sysfs_emit_at(buf, nchars, "%02lx.%04lx\n" , apid, apqi);
}
} else if (apid1 < napm_bits) {
for_each_set_bit_inv(apid, matrix->apm, napm_bits)
nchars += sysfs_emit_at(buf, nchars, "%02lx.\n" , apid);
} else if (apqi1 < naqm_bits) {
for_each_set_bit_inv(apqi, matrix->aqm, naqm_bits)
nchars += sysfs_emit_at(buf, nchars, ".%04lx\n" , apqi);
}
return nchars;
}
static ssize_t matrix_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
ssize_t nchars;
struct ap_matrix_mdev *matrix_mdev = dev_get_drvdata(dev);
mutex_lock(&matrix_dev->mdevs_lock);
nchars = vfio_ap_mdev_matrix_show(&matrix_mdev->matrix, buf);
mutex_unlock(&matrix_dev->mdevs_lock);
return nchars;
}
static DEVICE_ATTR_RO(matrix);
static ssize_t guest_matrix_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
ssize_t nchars;
struct ap_matrix_mdev *matrix_mdev = dev_get_drvdata(dev);
mutex_lock(&matrix_dev->mdevs_lock);
nchars = vfio_ap_mdev_matrix_show(&matrix_mdev->shadow_apcb, buf);
mutex_unlock(&matrix_dev->mdevs_lock);
return nchars;
}
static DEVICE_ATTR_RO(guest_matrix);
static ssize_t write_ap_bitmap(unsigned long *bitmap, char *buf, int offset, char sep)
{
return sysfs_emit_at(buf, offset, "0x%016lx%016lx%016lx%016lx%c" ,
bitmap[0 ], bitmap[1 ], bitmap[2 ], bitmap[3 ], sep);
}
static ssize_t ap_config_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct ap_matrix_mdev *matrix_mdev = dev_get_drvdata(dev);
int idx = 0 ;
idx += write_ap_bitmap(matrix_mdev->matrix.apm, buf, idx, ',' );
idx += write_ap_bitmap(matrix_mdev->matrix.aqm, buf, idx, ',' );
idx += write_ap_bitmap(matrix_mdev->matrix.adm, buf, idx, '\n' );
return idx;
}
/* Number of characters needed for a complete hex mask representing the bits in .. */
#define AP_DEVICES_STRLEN (AP_DEVICES / 4 + 3 )
#define AP_DOMAINS_STRLEN (AP_DOMAINS / 4 + 3 )
#define AP_CONFIG_STRLEN (AP_DEVICES_STRLEN + 2 * AP_DOMAINS_STRLEN)
static int parse_bitmap(char **strbufptr, unsigned long *bitmap, int nbits)
{
char *curmask;
curmask = strsep(strbufptr, ",\n" );
if (!curmask)
return -EINVAL;
bitmap_clear(bitmap, 0 , nbits);
return ap_hex2bitmap(curmask, bitmap, nbits);
}
static int ap_matrix_overflow_check(struct ap_matrix_mdev *matrix_mdev)
{
unsigned long bit;
for_each_set_bit_inv(bit, matrix_mdev->matrix.apm, AP_DEVICES) {
if (bit > matrix_mdev->matrix.apm_max)
return -ENODEV;
}
for_each_set_bit_inv(bit, matrix_mdev->matrix.aqm, AP_DOMAINS) {
if (bit > matrix_mdev->matrix.aqm_max)
return -ENODEV;
}
for_each_set_bit_inv(bit, matrix_mdev->matrix.adm, AP_DOMAINS) {
if (bit > matrix_mdev->matrix.adm_max)
return -ENODEV;
}
return 0 ;
}
static void ap_matrix_copy(struct ap_matrix *dst, struct ap_matrix *src)
{
/* This check works around false positive gcc -Wstringop-overread */
if (!src)
return ;
bitmap_copy(dst->apm, src->apm, AP_DEVICES);
bitmap_copy(dst->aqm, src->aqm, AP_DOMAINS);
bitmap_copy(dst->adm, src->adm, AP_DOMAINS);
}
static ssize_t ap_config_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct ap_matrix_mdev *matrix_mdev = dev_get_drvdata(dev);
struct ap_matrix m_new, m_old, m_added, m_removed;
DECLARE_BITMAP(apm_filtered, AP_DEVICES);
unsigned long newbit;
char *newbuf, *rest;
int rc = count;
bool do_update;
newbuf = kstrndup(buf, AP_CONFIG_STRLEN, GFP_KERNEL);
if (!newbuf)
return -ENOMEM;
rest = newbuf;
mutex_lock(&ap_perms_mutex);
get_update_locks_for_mdev(matrix_mdev);
/* Save old state */
ap_matrix_copy(&m_old, &matrix_mdev->matrix);
if (parse_bitmap(&rest, m_new.apm, AP_DEVICES) ||
parse_bitmap(&rest, m_new.aqm, AP_DOMAINS) ||
parse_bitmap(&rest, m_new.adm, AP_DOMAINS)) {
rc = -EINVAL;
goto out;
}
bitmap_andnot(m_removed.apm, m_old.apm, m_new.apm, AP_DEVICES);
bitmap_andnot(m_removed.aqm, m_old.aqm, m_new.aqm, AP_DOMAINS);
bitmap_andnot(m_added.apm, m_new.apm, m_old.apm, AP_DEVICES);
bitmap_andnot(m_added.aqm, m_new.aqm, m_old.aqm, AP_DOMAINS);
/* Need new bitmaps in matrix_mdev for validation */
ap_matrix_copy(&matrix_mdev->matrix, &m_new);
/* Ensure new state is valid, else undo new state */
rc = vfio_ap_mdev_validate_masks(matrix_mdev);
if (rc) {
ap_matrix_copy(&matrix_mdev->matrix, &m_old);
goto out;
}
rc = ap_matrix_overflow_check(matrix_mdev);
if (rc) {
ap_matrix_copy(&matrix_mdev->matrix, &m_old);
goto out;
}
rc = count;
/* Need old bitmaps in matrix_mdev for unplug/unlink */
ap_matrix_copy(&matrix_mdev->matrix, &m_old);
/* Unlink removed adapters/domains */
vfio_ap_mdev_hot_unplug_adapters(matrix_mdev, m_removed.apm);
vfio_ap_mdev_hot_unplug_domains(matrix_mdev, m_removed.aqm);
/* Need new bitmaps in matrix_mdev for linking new adapters/domains */
ap_matrix_copy(&matrix_mdev->matrix, &m_new);
/* Link newly added adapters */
for_each_set_bit_inv(newbit, m_added.apm, AP_DEVICES)
vfio_ap_mdev_link_adapter(matrix_mdev, newbit);
for_each_set_bit_inv(newbit, m_added.aqm, AP_DOMAINS)
vfio_ap_mdev_link_domain(matrix_mdev, newbit);
/* filter resources not bound to vfio-ap */
do_update = vfio_ap_mdev_filter_matrix(matrix_mdev, apm_filtered);
do_update |= vfio_ap_mdev_filter_cdoms(matrix_mdev);
/* Apply changes to shadow apbc if things changed */
if (do_update) {
vfio_ap_mdev_update_guest_apcb(matrix_mdev);
reset_queues_for_apids(matrix_mdev, apm_filtered);
}
out:
release_update_locks_for_mdev(matrix_mdev);
mutex_unlock(&ap_perms_mutex);
kfree(newbuf);
return rc;
}
static DEVICE_ATTR_RW(ap_config);
static struct attribute *vfio_ap_mdev_attrs[] = {
&dev_attr_assign_adapter.attr,
&dev_attr_unassign_adapter.attr,
&dev_attr_assign_domain.attr,
&dev_attr_unassign_domain.attr,
&dev_attr_assign_control_domain.attr,
&dev_attr_unassign_control_domain.attr,
&dev_attr_ap_config.attr,
&dev_attr_control_domains.attr,
&dev_attr_matrix.attr,
&dev_attr_guest_matrix.attr,
NULL,
};
static struct attribute_group vfio_ap_mdev_attr_group = {
.attrs = vfio_ap_mdev_attrs
};
static const struct attribute_group *vfio_ap_mdev_attr_groups[] = {
&vfio_ap_mdev_attr_group,
NULL
};
/**
* vfio_ap_mdev_set_kvm - sets all data for @ matrix_mdev that are needed
* to manage AP resources for the guest whose state is represented by @ kvm
*
* @ matrix_mdev : a mediated matrix device
* @ kvm : reference to KVM instance
*
* Return : 0 if no other mediated matrix device has a reference to @ kvm ;
* otherwise , returns an - EPERM .
*/
static int vfio_ap_mdev_set_kvm(struct ap_matrix_mdev *matrix_mdev,
struct kvm *kvm)
{
struct ap_matrix_mdev *m;
if (kvm->arch.crypto.crycbd) {
down_write(&kvm->arch.crypto.pqap_hook_rwsem);
kvm->arch.crypto.pqap_hook = &matrix_mdev->pqap_hook;
up_write(&kvm->arch.crypto.pqap_hook_rwsem);
get_update_locks_for_kvm(kvm);
list_for_each_entry(m, &matrix_dev->mdev_list, node) {
if (m != matrix_mdev && m->kvm == kvm) {
release_update_locks_for_kvm(kvm);
return -EPERM;
}
}
kvm_get_kvm(kvm);
matrix_mdev->kvm = kvm;
vfio_ap_mdev_update_guest_apcb(matrix_mdev);
release_update_locks_for_kvm(kvm);
}
return 0 ;
}
static void unmap_iova(struct ap_matrix_mdev *matrix_mdev, u64 iova, u64 length)
{
struct ap_queue_table *qtable = &matrix_mdev->qtable;
struct vfio_ap_queue *q;
int loop_cursor;
hash_for_each(qtable->queues, loop_cursor, q, mdev_qnode) {
if (q->saved_iova >= iova && q->saved_iova < iova + length)
vfio_ap_irq_disable(q);
}
}
static void vfio_ap_mdev_dma_unmap(struct vfio_device *vdev, u64 iova,
u64 length)
{
struct ap_matrix_mdev *matrix_mdev =
container_of(vdev, struct ap_matrix_mdev, vdev);
mutex_lock(&matrix_dev->mdevs_lock);
unmap_iova(matrix_mdev, iova, length);
mutex_unlock(&matrix_dev->mdevs_lock);
}
/**
* vfio_ap_mdev_unset_kvm - performs clean - up of resources no longer needed
* by @ matrix_mdev .
*
* @ matrix_mdev : a matrix mediated device
*/
static void vfio_ap_mdev_unset_kvm(struct ap_matrix_mdev *matrix_mdev)
{
struct kvm *kvm = matrix_mdev->kvm;
if (kvm && kvm->arch.crypto.crycbd) {
down_write(&kvm->arch.crypto.pqap_hook_rwsem);
kvm->arch.crypto.pqap_hook = NULL;
up_write(&kvm->arch.crypto.pqap_hook_rwsem);
get_update_locks_for_kvm(kvm);
kvm_arch_crypto_clear_masks(kvm);
vfio_ap_mdev_reset_queues(matrix_mdev);
kvm_put_kvm(kvm);
matrix_mdev->kvm = NULL;
release_update_locks_for_kvm(kvm);
}
}
static struct vfio_ap_queue *vfio_ap_find_queue(int apqn)
{
struct ap_queue *queue;
struct vfio_ap_queue *q = NULL;
queue = ap_get_qdev(apqn);
if (!queue)
return NULL;
if (queue->ap_dev.device.driver == &matrix_dev->vfio_ap_drv->driver)
q = dev_get_drvdata(&queue->ap_dev.device);
put_device(&queue->ap_dev.device);
return q;
}
static int apq_status_check(int apqn, struct ap_queue_status *status)
{
switch (status->response_code) {
case AP_RESPONSE_NORMAL:
case AP_RESPONSE_DECONFIGURED:
case AP_RESPONSE_CHECKSTOPPED:
return 0 ;
case AP_RESPONSE_RESET_IN_PROGRESS:
case AP_RESPONSE_BUSY:
return -EBUSY;
case AP_RESPONSE_ASSOC_SECRET_NOT_UNIQUE:
case AP_RESPONSE_ASSOC_FAILED:
/*
* These asynchronous response codes indicate a PQAP ( AAPQ )
* instruction to associate a secret with the guest failed . All
* subsequent AP instructions will end with the asynchronous
* response code until the AP queue is reset ; so , let ' s return
* a value indicating a reset needs to be performed again .
* /
return - EAGAIN ;
default :
WARN ( true ,
" failed to verify reset of queue % 02 x . % 04 x : TAPQ rc = % u \ n " ,
AP_QID_CARD ( apqn ) , AP_QID_QUEUE ( apqn ) ,
status - > response_code ) ;
return - EIO ;
}
}
# define WAIT_MSG " Waited % dms for reset of queue % 02 x . % 04 x ( % u , % u , % u ) "
static void apq_reset_check ( struct work_struct * reset_work )
{
int ret = - EBUSY , elapsed = 0 ;
struct ap_queue_status status ;
struct vfio_ap_queue * q ;
q = container_of ( reset_work , struct vfio_ap_queue , reset_work ) ;
memcpy ( & status , & q - > reset_status , sizeof ( status ) ) ;
while ( true ) {
msleep ( AP_RESET_INTERVAL ) ;
elapsed + = AP_RESET_INTERVAL ;
status = ap_tapq ( q - > apqn , NULL ) ;
ret = apq_status_check ( q - > apqn , & status ) ;
if ( ret = = - EIO )
return ;
if ( ret = = - EBUSY ) {
pr_notice_ratelimited ( WAIT_MSG , elapsed ,
AP_QID_CARD ( q - > apqn ) ,
AP_QID_QUEUE ( q - > apqn ) ,
status . response_code ,
status . queue_empty ,
status . irq_enabled ) ;
} else {
if ( q - > reset_status . response_code = = AP_RESPONSE_RESET_IN_PROGRESS | |
q - > reset_status . response_code = = AP_RESPONSE_BUSY | |
q - > reset_status . response_code = = AP_RESPONSE_STATE_CHANGE_IN_PROGRESS | |
ret = = - EAGAIN ) {
status = ap_zapq ( q - > apqn , 0 ) ;
memcpy ( & q - > reset_status , & status , sizeof ( status ) ) ;
continue ;
}
if ( q - > saved_isc ! = VFIO_AP_ISC_INVALID )
vfio_ap_free_aqic_resources ( q ) ;
break ;
}
}
}
static void vfio_ap_mdev_reset_queue ( struct vfio_ap_queue * q )
{
struct ap_queue_status status ;
if ( ! q )
return ;
status = ap_zapq ( q - > apqn , 0 ) ;
memcpy ( & q - > reset_status , & status , sizeof ( status ) ) ;
switch ( status . response_code ) {
case AP_RESPONSE_NORMAL :
case AP_RESPONSE_RESET_IN_PROGRESS :
case AP_RESPONSE_BUSY :
case AP_RESPONSE_STATE_CHANGE_IN_PROGRESS :
/*
* Let ' s verify whether the ZAPQ completed successfully on a work queue .
*/
queue_work(system_long_wq, &q->reset_work);
break ;
case AP_RESPONSE_DECONFIGURED:
case AP_RESPONSE_CHECKSTOPPED:
vfio_ap_free_aqic_resources(q);
break ;
default :
WARN(true ,
"PQAP/ZAPQ for %02x.%04x failed with invalid rc=%u\n" ,
AP_QID_CARD(q->apqn), AP_QID_QUEUE(q->apqn),
status.response_code);
}
}
static int vfio_ap_mdev_reset_queues(struct ap_matrix_mdev *matrix_mdev)
{
int ret = 0 , loop_cursor;
struct vfio_ap_queue *q;
hash_for_each(matrix_mdev->qtable.queues, loop_cursor, q, mdev_qnode)
vfio_ap_mdev_reset_queue(q);
hash_for_each(matrix_mdev->qtable.queues, loop_cursor, q, mdev_qnode) {
flush_work(&q->reset_work);
if (q->reset_status.response_code)
ret = -EIO;
}
return ret;
}
static int vfio_ap_mdev_reset_qlist(struct list_head *qlist)
{
int ret = 0 ;
struct vfio_ap_queue *q;
list_for_each_entry(q, qlist, reset_qnode)
vfio_ap_mdev_reset_queue(q);
list_for_each_entry(q, qlist, reset_qnode) {
flush_work(&q->reset_work);
if (q->reset_status.response_code)
ret = -EIO;
}
return ret;
}
static int vfio_ap_mdev_open_device(struct vfio_device *vdev)
{
struct ap_matrix_mdev *matrix_mdev =
container_of(vdev, struct ap_matrix_mdev, vdev);
if (!vdev->kvm)
return -EINVAL;
return vfio_ap_mdev_set_kvm(matrix_mdev, vdev->kvm);
}
static void vfio_ap_mdev_close_device(struct vfio_device *vdev)
{
struct ap_matrix_mdev *matrix_mdev =
container_of(vdev, struct ap_matrix_mdev, vdev);
vfio_ap_mdev_unset_kvm(matrix_mdev);
}
static void vfio_ap_mdev_request(struct vfio_device *vdev, unsigned int count)
{
struct device *dev = vdev->dev;
struct ap_matrix_mdev *matrix_mdev;
matrix_mdev = container_of(vdev, struct ap_matrix_mdev, vdev);
get_update_locks_for_mdev(matrix_mdev);
if (matrix_mdev->kvm) {
kvm_arch_crypto_clear_masks(matrix_mdev->kvm);
signal_guest_ap_cfg_changed(matrix_mdev);
}
if (matrix_mdev->req_trigger) {
if (!(count % 10 ))
dev_notice_ratelimited(dev,
"Relaying device request to user (#%u)\n" ,
count);
eventfd_signal(matrix_mdev->req_trigger);
} else if (count == 0 ) {
dev_notice(dev,
"No device request registered, blocked until released by user\n" );
}
release_update_locks_for_mdev(matrix_mdev);
}
static int vfio_ap_mdev_get_device_info(unsigned long arg)
{
unsigned long minsz;
struct vfio_device_info info;
minsz = offsetofend(struct vfio_device_info, num_irqs);
if (copy_from_user(&info, (void __user *)arg, minsz))
return -EFAULT;
if (info.argsz < minsz)
return -EINVAL;
info.flags = VFIO_DEVICE_FLAGS_AP | VFIO_DEVICE_FLAGS_RESET;
info.num_regions = 0 ;
info.num_irqs = VFIO_AP_NUM_IRQS;
return copy_to_user((void __user *)arg, &info, minsz) ? -EFAULT : 0 ;
}
static ssize_t vfio_ap_get_irq_info(unsigned long arg)
{
unsigned long minsz;
struct vfio_irq_info info;
minsz = offsetofend(struct vfio_irq_info, count);
if (copy_from_user(&info, (void __user *)arg, minsz))
return -EFAULT;
if (info.argsz < minsz || info.index >= VFIO_AP_NUM_IRQS)
return -EINVAL;
switch (info.index) {
case VFIO_AP_REQ_IRQ_INDEX:
info.count = 1 ;
info.flags = VFIO_IRQ_INFO_EVENTFD;
break ;
case VFIO_AP_CFG_CHG_IRQ_INDEX:
info.count = 1 ;
info.flags = VFIO_IRQ_INFO_EVENTFD;
break ;
default :
return -EINVAL;
}
return copy_to_user((void __user *)arg, &info, minsz) ? -EFAULT : 0 ;
}
static int vfio_ap_irq_set_init(struct vfio_irq_set *irq_set, unsigned long arg)
{
int ret;
size_t data_size;
unsigned long minsz;
minsz = offsetofend(struct vfio_irq_set, count);
if (copy_from_user(irq_set, (void __user *)arg, minsz))
return -EFAULT;
ret = vfio_set_irqs_validate_and_prepare(irq_set, 1 , VFIO_AP_NUM_IRQS,
&data_size);
if (ret)
return ret;
if (!(irq_set->flags & VFIO_IRQ_SET_ACTION_TRIGGER))
return -EINVAL;
return 0 ;
}
static int vfio_ap_set_request_irq(struct ap_matrix_mdev *matrix_mdev,
unsigned long arg)
{
s32 fd;
void __user *data;
unsigned long minsz;
struct eventfd_ctx *req_trigger;
minsz = offsetofend(struct vfio_irq_set, count);
data = (void __user *)(arg + minsz);
if (get_user(fd, (s32 __user *)data))
return -EFAULT;
if (fd == -1 ) {
if (matrix_mdev->req_trigger)
eventfd_ctx_put(matrix_mdev->req_trigger);
matrix_mdev->req_trigger = NULL;
} else if (fd >= 0 ) {
req_trigger = eventfd_ctx_fdget(fd);
if (IS_ERR(req_trigger))
return PTR_ERR(req_trigger);
if (matrix_mdev->req_trigger)
eventfd_ctx_put(matrix_mdev->req_trigger);
matrix_mdev->req_trigger = req_trigger;
} else {
return -EINVAL;
}
return 0 ;
}
static int vfio_ap_set_cfg_change_irq(struct ap_matrix_mdev *matrix_mdev, unsigned long arg)
{
s32 fd;
void __user *data;
unsigned long minsz;
struct eventfd_ctx *cfg_chg_trigger;
minsz = offsetofend(struct vfio_irq_set, count);
data = (void __user *)(arg + minsz);
if (get_user(fd, (s32 __user *)data))
return -EFAULT;
if (fd == -1 ) {
if (matrix_mdev->cfg_chg_trigger)
eventfd_ctx_put(matrix_mdev->cfg_chg_trigger);
matrix_mdev->cfg_chg_trigger = NULL;
} else if (fd >= 0 ) {
cfg_chg_trigger = eventfd_ctx_fdget(fd);
if (IS_ERR(cfg_chg_trigger))
return PTR_ERR(cfg_chg_trigger);
if (matrix_mdev->cfg_chg_trigger)
eventfd_ctx_put(matrix_mdev->cfg_chg_trigger);
matrix_mdev->cfg_chg_trigger = cfg_chg_trigger;
} else {
return -EINVAL;
}
return 0 ;
}
static int vfio_ap_set_irqs(struct ap_matrix_mdev *matrix_mdev,
unsigned long arg)
{
int ret;
struct vfio_irq_set irq_set;
ret = vfio_ap_irq_set_init(&irq_set, arg);
if (ret)
return ret;
switch (irq_set.flags & VFIO_IRQ_SET_DATA_TYPE_MASK) {
case VFIO_IRQ_SET_DATA_EVENTFD:
switch (irq_set.index) {
case VFIO_AP_REQ_IRQ_INDEX:
return vfio_ap_set_request_irq(matrix_mdev, arg);
case VFIO_AP_CFG_CHG_IRQ_INDEX:
return vfio_ap_set_cfg_change_irq(matrix_mdev, arg);
default :
return -EINVAL;
}
default :
return -EINVAL;
}
}
static ssize_t vfio_ap_mdev_ioctl(struct vfio_device *vdev,
unsigned int cmd, unsigned long arg)
{
struct ap_matrix_mdev *matrix_mdev =
container_of(vdev, struct ap_matrix_mdev, vdev);
int ret;
mutex_lock(&matrix_dev->mdevs_lock);
switch (cmd) {
case VFIO_DEVICE_GET_INFO:
ret = vfio_ap_mdev_get_device_info(arg);
break ;
case VFIO_DEVICE_RESET:
ret = vfio_ap_mdev_reset_queues(matrix_mdev);
break ;
case VFIO_DEVICE_GET_IRQ_INFO:
ret = vfio_ap_get_irq_info(arg);
break ;
case VFIO_DEVICE_SET_IRQS:
ret = vfio_ap_set_irqs(matrix_mdev, arg);
break ;
default :
ret = -EOPNOTSUPP;
break ;
}
mutex_unlock(&matrix_dev->mdevs_lock);
return ret;
}
static struct ap_matrix_mdev *vfio_ap_mdev_for_queue(struct vfio_ap_queue *q)
{
struct ap_matrix_mdev *matrix_mdev;
unsigned long apid = AP_QID_CARD(q->apqn);
unsigned long apqi = AP_QID_QUEUE(q->apqn);
list_for_each_entry(matrix_mdev, &matrix_dev->mdev_list, node) {
if (test_bit_inv(apid, matrix_mdev->matrix.apm) &&
test_bit_inv(apqi, matrix_mdev->matrix.aqm))
return matrix_mdev;
}
return NULL;
}
static ssize_t status_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
ssize_t nchars = 0 ;
struct vfio_ap_queue *q;
unsigned long apid, apqi;
struct ap_matrix_mdev *matrix_mdev;
struct ap_device *apdev = to_ap_dev(dev);
mutex_lock(&matrix_dev->mdevs_lock);
q = dev_get_drvdata(&apdev->device);
matrix_mdev = vfio_ap_mdev_for_queue(q);
/* If the queue is assigned to the matrix mediated device, then
* determine whether it is passed through to a guest ; otherwise ,
* indicate that it is unassigned .
*/
if (matrix_mdev) {
apid = AP_QID_CARD(q->apqn);
apqi = AP_QID_QUEUE(q->apqn);
/*
* If the queue is passed through to the guest , then indicate
* that it is in use ; otherwise , indicate that it is
* merely assigned to a matrix mediated device .
*/
if (matrix_mdev->kvm &&
test_bit_inv(apid, matrix_mdev->shadow_apcb.apm) &&
test_bit_inv(apqi, matrix_mdev->shadow_apcb.aqm))
nchars = sysfs_emit(buf, "%s\n" , AP_QUEUE_IN_USE);
else
nchars = sysfs_emit(buf, "%s\n" , AP_QUEUE_ASSIGNED);
} else {
nchars = sysfs_emit(buf, "%s\n" , AP_QUEUE_UNASSIGNED);
}
mutex_unlock(&matrix_dev->mdevs_lock);
return nchars;
}
static DEVICE_ATTR_RO(status);
static struct attribute *vfio_queue_attrs[] = {
&dev_attr_status.attr,
NULL,
};
static const struct attribute_group vfio_queue_attr_group = {
.attrs = vfio_queue_attrs,
};
static const struct vfio_device_ops vfio_ap_matrix_dev_ops = {
.init = vfio_ap_mdev_init_dev,
.open_device = vfio_ap_mdev_open_device,
.close_device = vfio_ap_mdev_close_device,
.ioctl = vfio_ap_mdev_ioctl,
.dma_unmap = vfio_ap_mdev_dma_unmap,
.bind_iommufd = vfio_iommufd_emulated_bind,
.unbind_iommufd = vfio_iommufd_emulated_unbind,
.attach_ioas = vfio_iommufd_emulated_attach_ioas,
.detach_ioas = vfio_iommufd_emulated_detach_ioas,
.request = vfio_ap_mdev_request
};
static struct mdev_driver vfio_ap_matrix_driver = {
.device_api = VFIO_DEVICE_API_AP_STRING,
.max_instances = MAX_ZDEV_ENTRIES_EXT,
.driver = {
.name = "vfio_ap_mdev" ,
.owner = THIS_MODULE,
.mod_name = KBUILD_MODNAME,
.dev_groups = vfio_ap_mdev_attr_groups,
},
.probe = vfio_ap_mdev_probe,
.remove = vfio_ap_mdev_remove,
};
int vfio_ap_mdev_register(void )
{
int ret;
ret = mdev_register_driver(&vfio_ap_matrix_driver);
if (ret)
return ret;
matrix_dev->mdev_type.sysfs_name = VFIO_AP_MDEV_TYPE_HWVIRT;
matrix_dev->mdev_type.pretty_name = VFIO_AP_MDEV_NAME_HWVIRT;
matrix_dev->mdev_types = &matrix_dev->mdev_type;
ret = mdev_register_parent(&matrix_dev->parent, &matrix_dev->device,
&vfio_ap_matrix_driver,
&matrix_dev->mdev_types, 1 );
if (ret)
goto err_driver;
return 0 ;
err_driver:
mdev_unregister_driver(&vfio_ap_matrix_driver);
return ret;
}
void vfio_ap_mdev_unregister(void )
{
mdev_unregister_parent(&matrix_dev->parent);
mdev_unregister_driver(&vfio_ap_matrix_driver);
}
int vfio_ap_mdev_probe_queue(struct ap_device *apdev)
{
int ret;
struct vfio_ap_queue *q;
DECLARE_BITMAP(apm_filtered, AP_DEVICES);
struct ap_matrix_mdev *matrix_mdev;
ret = sysfs_create_group(&apdev->device.kobj, &vfio_queue_attr_group);
if (ret)
return ret;
q = kzalloc(sizeof (*q), GFP_KERNEL);
if (!q) {
ret = -ENOMEM;
goto err_remove_group;
}
q->apqn = to_ap_queue(&apdev->device)->qid;
q->saved_isc = VFIO_AP_ISC_INVALID;
memset(&q->reset_status, 0 , sizeof (q->reset_status));
INIT_WORK(&q->reset_work, apq_reset_check);
matrix_mdev = get_update_locks_by_apqn(q->apqn);
if (matrix_mdev) {
vfio_ap_mdev_link_queue(matrix_mdev, q);
/*
* If we ' re in the process of handling the adding of adapters or
* domains to the host ' s AP configuration , then let the
* vfio_ap device driver ' s on_scan_complete callback filter the
* matrix and update the guest ' s AP configuration after all of
* the new queue devices are probed .
*/
if (!bitmap_empty(matrix_mdev->apm_add, AP_DEVICES) ||
!bitmap_empty(matrix_mdev->aqm_add, AP_DOMAINS))
goto done;
if (vfio_ap_mdev_filter_matrix(matrix_mdev, apm_filtered)) {
vfio_ap_mdev_update_guest_apcb(matrix_mdev);
reset_queues_for_apids(matrix_mdev, apm_filtered);
}
}
done:
dev_set_drvdata(&apdev->device, q);
release_update_locks_for_mdev(matrix_mdev);
return ret;
err_remove_group:
sysfs_remove_group(&apdev->device.kobj, &vfio_queue_attr_group);
return ret;
}
void vfio_ap_mdev_remove_queue(struct ap_device *apdev)
{
unsigned long apid, apqi;
struct vfio_ap_queue *q;
struct ap_matrix_mdev *matrix_mdev;
sysfs_remove_group(&apdev->device.kobj, &vfio_queue_attr_group);
q = dev_get_drvdata(&apdev->device);
get_update_locks_for_queue(q);
matrix_mdev = q->matrix_mdev;
apid = AP_QID_CARD(q->apqn);
apqi = AP_QID_QUEUE(q->apqn);
if (matrix_mdev) {
/* If the queue is assigned to the guest's AP configuration */
if (test_bit_inv(apid, matrix_mdev->shadow_apcb.apm) &&
test_bit_inv(apqi, matrix_mdev->shadow_apcb.aqm)) {
/*
* Since the queues are defined via a matrix of adapters
* and domains , it is not possible to hot unplug a
* single queue ; so , let ' s unplug the adapter .
*/
clear_bit_inv(apid, matrix_mdev->shadow_apcb.apm);
vfio_ap_mdev_update_guest_apcb(matrix_mdev);
reset_queues_for_apid(matrix_mdev, apid);
goto done;
}
}
/*
* If the queue is not in the host ' s AP configuration , then resetting
* it will fail with response code 01 , ( APQN not valid ) ; so , let ' s make
* sure it is in the host ' s config .
*/
if (test_bit_inv(apid, (unsigned long *)matrix_dev->info.apm) &&
test_bit_inv(apqi, (unsigned long *)matrix_dev->info.aqm)) {
vfio_ap_mdev_reset_queue(q);
flush_work(&q->reset_work);
}
done:
if (matrix_mdev)
vfio_ap_unlink_queue_fr_mdev(q);
dev_set_drvdata(&apdev->device, NULL);
kfree(q);
release_update_locks_for_mdev(matrix_mdev);
}
/**
* vfio_ap_mdev_resource_in_use : check whether any of a set of APQNs is
* assigned to a mediated device under the control
* of the vfio_ap device driver .
*
* @ apm : a bitmap specifying a set of APIDs comprising the APQNs to check .
* @ aqm : a bitmap specifying a set of APQIs comprising the APQNs to check .
*
* Return :
* * - EADDRINUSE if one or more of the APQNs specified via @ apm / @ aqm are
* assigned to a mediated device under the control of the vfio_ap
* device driver .
* * Otherwise , return 0 .
*/
int vfio_ap_mdev_resource_in_use(unsigned long *apm, unsigned long *aqm)
{
int ret;
mutex_lock(&matrix_dev->guests_lock);
mutex_lock(&matrix_dev->mdevs_lock);
ret = vfio_ap_mdev_verify_no_sharing(NULL, apm, aqm);
mutex_unlock(&matrix_dev->mdevs_lock);
mutex_unlock(&matrix_dev->guests_lock);
return ret;
}
/**
* vfio_ap_mdev_hot_unplug_cfg - hot unplug the adapters , domains and control
* domains that have been removed from the host ' s
* AP configuration from a guest .
*
* @ matrix_mdev : an ap_matrix_mdev object attached to a KVM guest .
* @ aprem : the adapters that have been removed from the host ' s AP configuration
* @ aqrem : the domains that have been removed from the host ' s AP configuration
* @ cdrem : the control domains that have been removed from the host ' s AP
* configuration .
*/
static void vfio_ap_mdev_hot_unplug_cfg(struct ap_matrix_mdev *matrix_mdev,
unsigned long *aprem,
unsigned long *aqrem,
unsigned long *cdrem)
{
int do_hotplug = 0 ;
if (!bitmap_empty(aprem, AP_DEVICES)) {
do_hotplug |= bitmap_andnot(matrix_mdev->shadow_apcb.apm,
matrix_mdev->shadow_apcb.apm,
aprem, AP_DEVICES);
}
if (!bitmap_empty(aqrem, AP_DOMAINS)) {
do_hotplug |= bitmap_andnot(matrix_mdev->shadow_apcb.aqm,
matrix_mdev->shadow_apcb.aqm,
aqrem, AP_DEVICES);
}
if (!bitmap_empty(cdrem, AP_DOMAINS))
do_hotplug |= bitmap_andnot(matrix_mdev->shadow_apcb.adm,
matrix_mdev->shadow_apcb.adm,
cdrem, AP_DOMAINS);
if (do_hotplug)
vfio_ap_mdev_update_guest_apcb(matrix_mdev);
}
/**
* vfio_ap_mdev_cfg_remove - determines which guests are using the adapters ,
* domains and control domains that have been removed
* from the host AP configuration and unplugs them
* from those guests .
*
* @ ap_remove : bitmap specifying which adapters have been removed from the host
* config .
* @ aq_remove : bitmap specifying which domains have been removed from the host
* config .
* @ cd_remove : bitmap specifying which control domains have been removed from
* the host config .
*/
static void vfio_ap_mdev_cfg_remove(unsigned long *ap_remove,
unsigned long *aq_remove,
unsigned long *cd_remove)
{
struct ap_matrix_mdev *matrix_mdev;
DECLARE_BITMAP(aprem, AP_DEVICES);
DECLARE_BITMAP(aqrem, AP_DOMAINS);
DECLARE_BITMAP(cdrem, AP_DOMAINS);
int do_remove = 0 ;
list_for_each_entry(matrix_mdev, &matrix_dev->mdev_list, node) {
mutex_lock(&matrix_mdev->kvm->lock);
mutex_lock(&matrix_dev->mdevs_lock);
do_remove |= bitmap_and(aprem, ap_remove,
matrix_mdev->matrix.apm,
AP_DEVICES);
do_remove |= bitmap_and(aqrem, aq_remove,
matrix_mdev->matrix.aqm,
AP_DOMAINS);
do_remove |= bitmap_andnot(cdrem, cd_remove,
matrix_mdev->matrix.adm,
AP_DOMAINS);
if (do_remove)
vfio_ap_mdev_hot_unplug_cfg(matrix_mdev, aprem, aqrem,
cdrem);
mutex_unlock(&matrix_dev->mdevs_lock);
mutex_unlock(&matrix_mdev->kvm->lock);
}
}
/**
* vfio_ap_mdev_on_cfg_remove - responds to the removal of adapters , domains and
* control domains from the host AP configuration
* by unplugging them from the guests that are
* using them .
* @ cur_config_info : the current host AP configuration information
* @ prev_config_info : the previous host AP configuration information
*/
static void vfio_ap_mdev_on_cfg_remove(struct ap_config_info *cur_config_info,
struct ap_config_info *prev_config_info)
{
int do_remove;
DECLARE_BITMAP(aprem, AP_DEVICES);
DECLARE_BITMAP(aqrem, AP_DOMAINS);
DECLARE_BITMAP(cdrem, AP_DOMAINS);
do_remove = bitmap_andnot(aprem,
(unsigned long *)prev_config_info->apm,
(unsigned long *)cur_config_info->apm,
AP_DEVICES);
do_remove |= bitmap_andnot(aqrem,
(unsigned long *)prev_config_info->aqm,
(unsigned long *)cur_config_info->aqm,
AP_DEVICES);
do_remove |= bitmap_andnot(cdrem,
(unsigned long *)prev_config_info->adm,
(unsigned long *)cur_config_info->adm,
AP_DEVICES);
if (do_remove)
vfio_ap_mdev_cfg_remove(aprem, aqrem, cdrem);
}
/**
* vfio_ap_filter_apid_by_qtype : filter APIDs from an AP mask for adapters that
* are older than AP type 10 ( CEX4 ) .
* @ apm : a bitmap of the APIDs to examine
* @ aqm : a bitmap * @aqm: a bitmap of b - width : 4 indent - tabs - nil c - basic - offset : 4 - - * java.lang.StringIndexOutOfBoundsException: Index 79 out of bounds for length 79
*/
static void vfio_ap_filter_apid_by_qtype(unsigned long *apm, unsigned long *aqm)
{
bool apid_cleared;
struct ap_queue_status status;
unsigned long apid, apqi;
struct ap_tapq_hwinfo info;
for_each_set_bit_inv(apid, apm, AP_DEVICES) {
java.lang.StringIndexOutOfBoundsException: Range [15, 14) out of bounds for length 23
for_each_set_bit_inv(apqi, aqm, AP_DOMAINS) {
status = ap_test_queue(AP_MKQID(apid, apqi)*ownershipthis youjava.lang.StringIndexOutOfBoundsException: Range [56, 55) out of bounds for length 66
switch (status.response_code) {
/*
* According to the architecture in each case
* below , the queue ' s info should be * except in compliance with the License. You of
*/
case AP_RESPONSE_NORMAL:
case AP_RESPONSE_RESET_IN_PROGRESS:
# /star/
java.lang.StringIndexOutOfBoundsException: Range [9, 8) out of bounds for length 49
ijava.lang.StringIndexOutOfBoundsException: Range [9, 8) out of bounds for length 23
/*
* The driver
* supports CEX4 and newer adapters , so
* remove the APID if the adapter is
* older than a CEX4 .
*/
i.at java.lang.StringIndexOutOfBoundsException: Range [39, 37) out of bounds for length 40
apid )java.lang.StringIndexOutOfBoundsException: Index 30 out of bounds for length 30
apid_cleared=;
}
java.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 10
java.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 11
java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
*If we 'know the adapter type,
its APID since it can't be
* determined }
*driver it.
*/
clear_bit_inv(apid, java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
apid_cleared = awt::,
frame::XBorderResizeListener
}
/*
've already cleared the APID from the apm , there
* is no need to continue examining SAL_CALL : & ) java.lang.StringIndexOutOfBoundsException: Index 83 out of bounds for length 83
* queues to determine java.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 0
*/
if (java.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 0
continue ;
}
}
}
/**
/** Calls the Workbook_Window[Activate|Deactivate] event handler. */
* control void postWindowResizeEvent ( vcl : Window * pWindow java.lang.StringIndexOutOfBoundsException: Index 55 out of bounds for length 55
* ScVbaEventsHelper & mrVbaEvents java.lang.StringIndexOutOfBoundsException: Index 36 out of bounds for length 36
* are assigned .
*
* configuration .
* @ aqm_add : a bitmap specifying the domains that have been added to the AP
java.lang.StringIndexOutOfBoundsException: Range [26, 25) out of bounds for length 28
* : a bitmap that to
* AP configuration .
java.lang.StringIndexOutOfBoundsException: Index 8 out of bounds for length 3
( unsigned long * apm_add , unsigned long * aqm_add ,
)
{
struct maControllers [ pWindow ] = rxController ;
if ( if( xWindow ( xWindow . ) )
return java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
if( xControllerBorder java.lang.StringIndexOutOfBoundsException: Range [26, 25) out of bounds for length 32
( matrix_mdev , matrix_dev - > mdev_list , node ) {
bitmap_and ( matrix_mdev - > apm_add ,
matrix_mdev - > matrix . apm , apm_add , AP_DEVICES ) ;
bitmap_and ( matrix_mdev - > aqm_add ,
matrix_mdev - java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
void SAL_CALL : : ( : EventObject & /*rEvent*/ )
- matrix . , AP_DEVICES ) java.lang.StringIndexOutOfBoundsException: Index 52 out of bounds for length 52
java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
}
vfio_ap_mdev_on_cfg_add - responds to the addition of adapters , domains and
* domains to host
,
* if java.lang.StringIndexOutOfBoundsException: Range [20, 19) out of bounds for length 52
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
* @ ur_config_info : the AP configuration
* @ prev_config_info : the void SAL_CALL ScVbaEventListener ( : : EventObject & /*rEvent*/ )
*/
java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 0
struct *)
{
bool do_add;
,;
aqm_addAP_DOMAINS;
OUStringjava.lang.StringIndexOutOfBoundsException: Range [24, 23) out of bounds for length 24
=a,
(unsigned long *)cur_config_info->apm,
(unsigned java.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 9
:<:>
do_add |= bitmap_andnot
( *c-,
*->java.lang.StringIndexOutOfBoundsException: Index 43 out of bounds for length 43
AP_DOMAINS);
do_add }
u long *c-adm
(unsigned long *)prev_config_info->adm,
;
if (do_add)
vfio_ap_mdev_cfg_add( return ;
/**
* java.lang.StringIndexOutOfBoundsException: Range [0, 25) out of bounds for length 7
* uno : Reference < : > ( mxModel , : ;
*
* @ cur_cfg_info : the current host xChangesNotifier - removeChangesListener this ) java.lang.StringIndexOutOfBoundsException: Index 56 out of bounds for length 56
* @ prev_cfg_info : the previous host return (aIt == maControllers.end()) : : : Controller ( - second ;
*/
void vfio_ap_on_cfg_changed(struct if( pWindow && (maControllers.count 0
*java.lang.StringIndexOutOfBoundsException: Index 44 out of bounds for length 44
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
if (!|!)
return ;
mutex_lock(&matrix_dev->guests_lock);
vfio_ap_mdev_on_cfg_remove(cur_cfg_info, prev_cfg_info);
vfio_ap_mdev_on_cfg_add(cur_cfg_info, prev_cfg_info);
memcpy(&matrix_dev->info, cur_cfg_info, sizeof (*cur_cfg_info));
mutex_unlock(&matrix_dev->guests_lock);
}
static void vfio_ap_mdev_hot_plug_cfg(struct ap_matrix_mdev *matrix_mdev)
{
DECLARE_BITMAP(apm_filtered, AP_DEVICES);
bool filter_domains,filter_adapters,filter_cdoms,do_hotplug =false
mutex_lock(&matrix_mdev->kvm->lock);
mutex_lock(&matrix_dev->mdevs_lock);
maControllerscontains pWindow
matrix_mdev->apm_add, AP_DEVICES);
=(atrix_mdevm.,
filter_cdoms
matrix_mdev-> mrVbaEvents( java.lang.StringIndexOutOfBoundsException: Range [81, 80) out of bounds for length 83
if (filter_adapters || filter_domains)
do_hotplug = m_PostedWindows()
)
do_hotplug |= vfio_ap_mdev_filter_cdoms(matrix_mdev);
if (do_hotplug) ;
vfio_ap_mdev_update_guest_apcb(matrix_mdev);
reset_queues_for_apids// Workbook
mutex_unlock(&matrix_dev->mdevs_lock);
(matrix_mdev-kvm-lock;
}
void vfio_ap_on_scan_complete(struct ap_config_info *new_config_info,
struct ap_config_info *old_config_info)
{
struct ap_matrix_mdev *matrix_mdev;
mutex_lock(&matrix_dev->guests_lock);
list_for_each_entry(matrix_mdev, &matrix_dev->mdev_list, node java.lang.StringIndexOutOfBoundsException: Range [71, 70) out of bounds for length 84
nID :ModuleType::(OStringC(" )(,
(>qm_add &
bitmap_empty(matrix_mdev->adm_add, ((nCancelIndex >= 0) ) 1 ,:false )
continue ;
();
bitmap_clear(matrix_mdev->apm_add, 0 , AP_DEVICESC, ;
bitmap_clear(registerWorksheetEventjava.lang.StringIndexOutOfBoundsException: Range [54, 53) out of bounds for length 85
bitmap_clear(matrix_mdev->adm_add 0 )java.lang.StringIndexOutOfBoundsException: Index 52 out of bounds for length 52
}
mutex_unlock(&matrix_dev->guests_lock);
}
Messung V0.5 in Prozent C=96 H=95 G=95
¤ Dauer der Verarbeitung: 0.102 Sekunden
¤
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