From: Aaron Lewis Date: Tue, 21 Feb 2023 16:36:54 +0000 (+0000) Subject: KVM: selftests: Check that the palette table exists before using it X-Git-Tag: v6.6.17~4946^2~2^2~9 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=d32fb071429360f5f597c284087c845b2f748ebe;p=platform%2Fkernel%2Flinux-rpi.git KVM: selftests: Check that the palette table exists before using it Check that the palette table exists before using it. The maximum number of AMX palette tables is enumerated by CPUID.1DH:EAX. Assert that the palette used in amx_test, CPUID.1DH.1H, does not exceed that maximum. Signed-off-by: Aaron Lewis Signed-off-by: Mingwei Zhang Link: https://lore.kernel.org/r/20230221163655.920289-13-mizhang@google.com Signed-off-by: Sean Christopherson --- diff --git a/tools/testing/selftests/kvm/include/x86_64/processor.h b/tools/testing/selftests/kvm/include/x86_64/processor.h index 44b6c23..f108fae 100644 --- a/tools/testing/selftests/kvm/include/x86_64/processor.h +++ b/tools/testing/selftests/kvm/include/x86_64/processor.h @@ -227,6 +227,7 @@ struct kvm_x86_cpu_property { #define X86_PROPERTY_XSTATE_MAX_SIZE KVM_X86_CPU_PROPERTY(0xd, 0, ECX, 0, 31) #define X86_PROPERTY_XSTATE_TILE_SIZE KVM_X86_CPU_PROPERTY(0xd, 18, EAX, 0, 31) #define X86_PROPERTY_XSTATE_TILE_OFFSET KVM_X86_CPU_PROPERTY(0xd, 18, EBX, 0, 31) +#define X86_PROPERTY_AMX_MAX_PALETTE_TABLES KVM_X86_CPU_PROPERTY(0x1d, 0, EAX, 0, 31) #define X86_PROPERTY_AMX_TOTAL_TILE_BYTES KVM_X86_CPU_PROPERTY(0x1d, 1, EAX, 0, 15) #define X86_PROPERTY_AMX_BYTES_PER_TILE KVM_X86_CPU_PROPERTY(0x1d, 1, EAX, 16, 31) #define X86_PROPERTY_AMX_BYTES_PER_ROW KVM_X86_CPU_PROPERTY(0x1d, 1, EBX, 0, 15) diff --git a/tools/testing/selftests/kvm/x86_64/amx_test.c b/tools/testing/selftests/kvm/x86_64/amx_test.c index d1838d5..8e8f26d 100644 --- a/tools/testing/selftests/kvm/x86_64/amx_test.c +++ b/tools/testing/selftests/kvm/x86_64/amx_test.c @@ -30,6 +30,7 @@ #define XSAVE_SIZE ((NUM_TILES * TILE_SIZE) + PAGE_SIZE) /* Tile configuration associated: */ +#define PALETTE_TABLE_INDEX 1 #define MAX_TILES 16 #define RESERVED_BYTES 14 @@ -120,6 +121,10 @@ static void check_xtile_info(void) GUEST_ASSERT(xtile.xsave_size == 8192); GUEST_ASSERT(sizeof(struct tile_data) >= xtile.xsave_size); + GUEST_ASSERT(this_cpu_has_p(X86_PROPERTY_AMX_MAX_PALETTE_TABLES)); + GUEST_ASSERT(this_cpu_property(X86_PROPERTY_AMX_MAX_PALETTE_TABLES) >= + PALETTE_TABLE_INDEX); + GUEST_ASSERT(this_cpu_has_p(X86_PROPERTY_AMX_NR_TILE_REGS)); xtile.max_names = this_cpu_property(X86_PROPERTY_AMX_NR_TILE_REGS); GUEST_ASSERT(xtile.max_names == 8);