/* * Usage: * ALTERNATIVE(old_content, new_content, vendor_id, patch_id, CONFIG_k) * in the assembly code. Otherwise, * asm(ALTERNATIVE(old_content, new_content, vendor_id, patch_id, CONFIG_k)); * * old_content: The old content which is probably replaced with new content. * new_content: The new content. * vendor_id: The CPU vendor ID. * patch_id: The patch ID (erratum ID or cpufeature ID). * CONFIG_k: The Kconfig of this patch ID. When Kconfig is disabled, the old * content will always be executed.
*/ #define ALTERNATIVE(old_content, new_content, vendor_id, patch_id, CONFIG_k) \
_ALTERNATIVE_CFG(old_content, new_content, vendor_id, patch_id, CONFIG_k)
/* * A vendor wants to replace an old_content, but another vendor has used * ALTERNATIVE() to patch its customized content at the same location. In * this case, this vendor can create a new macro ALTERNATIVE_2() based * on the following sample code and then replace ALTERNATIVE() with * ALTERNATIVE_2() to append its customized content.
*/ #define ALTERNATIVE_2(old_content, new_content_1, vendor_id_1, patch_id_1, CONFIG_k_1, \
new_content_2, vendor_id_2, patch_id_2, CONFIG_k_2) \
_ALTERNATIVE_CFG_2(old_content, new_content_1, vendor_id_1, patch_id_1, CONFIG_k_1, \
new_content_2, vendor_id_2, patch_id_2, CONFIG_k_2)
#endif
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