Messages in this thread Patch in this message | | | From | Nikunj A Dadhania <> | Subject | [RFC PATCH 06/11] x86/mm: Add generic guest initialization hook | Date | Mon, 30 Jan 2023 17:33:22 +0530 |
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Add generic enc_init guest hook for performing any type of initialization that is vendor specific.
Signed-off-by: Nikunj A Dadhania <nikunj@amd.com> --- arch/x86/include/asm/x86_init.h | 2 ++ arch/x86/kernel/x86_init.c | 2 ++ arch/x86/mm/mem_encrypt.c | 3 +++ 3 files changed, 7 insertions(+)
diff --git a/arch/x86/include/asm/x86_init.h b/arch/x86/include/asm/x86_init.h index c1c8c581759d..4026ac30a79f 100644 --- a/arch/x86/include/asm/x86_init.h +++ b/arch/x86/include/asm/x86_init.h @@ -148,12 +148,14 @@ struct x86_init_acpi { * @enc_status_change_finish Notify HV after the encryption status of a range is changed * @enc_tlb_flush_required Returns true if a TLB flush is needed before changing page encryption status * @enc_cache_flush_required Returns true if a cache flush is needed before changing page encryption status + * @enc_init Prepare and initialize encryption features */ struct x86_guest { void (*enc_status_change_prepare)(unsigned long vaddr, int npages, bool enc); bool (*enc_status_change_finish)(unsigned long vaddr, int npages, bool enc); bool (*enc_tlb_flush_required)(bool enc); bool (*enc_cache_flush_required)(void); + void (*enc_init)(void); }; /** diff --git a/arch/x86/kernel/x86_init.c b/arch/x86/kernel/x86_init.c index ef80d361b463..a71996e51a9c 100644 --- a/arch/x86/kernel/x86_init.c +++ b/arch/x86/kernel/x86_init.c @@ -134,6 +134,7 @@ static void enc_status_change_prepare_noop(unsigned long vaddr, int npages, bool static bool enc_status_change_finish_noop(unsigned long vaddr, int npages, bool enc) { return false; } static bool enc_tlb_flush_required_noop(bool enc) { return false; } static bool enc_cache_flush_required_noop(void) { return false; } +static void enc_init_noop(void) { } struct x86_platform_ops x86_platform __ro_after_init = { .calibrate_cpu = native_calibrate_cpu_early, @@ -155,6 +156,7 @@ struct x86_platform_ops x86_platform __ro_after_init = { .enc_status_change_finish = enc_status_change_finish_noop, .enc_tlb_flush_required = enc_tlb_flush_required_noop, .enc_cache_flush_required = enc_cache_flush_required_noop, + .enc_init = enc_init_noop, }, }; diff --git a/arch/x86/mm/mem_encrypt.c b/arch/x86/mm/mem_encrypt.c index 9f27e14e185f..01abecc9a774 100644 --- a/arch/x86/mm/mem_encrypt.c +++ b/arch/x86/mm/mem_encrypt.c @@ -84,5 +84,8 @@ void __init mem_encrypt_init(void) /* Call into SWIOTLB to update the SWIOTLB DMA buffers */ swiotlb_update_mem_attributes(); + if (x86_platform.guest.enc_init) + x86_platform.guest.enc_init(); + print_mem_encrypt_feature_info(); } -- 2.32.0
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