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HACK WIP [NTOS:KE] Detect AVX, AVX2 and AVX512

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This commit is contained in:
Timo Kreuzer 2025-02-04 14:47:44 +02:00
parent f846244e3a
commit 2f58cd792e
3 changed files with 16 additions and 3 deletions
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5
ntoskrnl/ke/amd64/cpu.c
View file

@ -210,6 +210,8 @@ KiGetFeatureBits(VOID)
if (VersionInfo.Ecx.Bits.XSAVE) FeatureBits |= KF_XSTATE;
if (VersionInfo.Ecx.Bits.RDRAND) FeatureBits |= KF_RDRAND;
if (VersionInfo.Ecx.Bits.AVX) FeatureBits |= KF_AVX;
/* Check if the CPU has hyper-threading */
if (VersionInfo.Edx.Bits.HTT)
{
@ -250,6 +252,9 @@ KiGetFeatureBits(VOID)
if (ExtFlags.Ebx.Bits.SMEP) FeatureBits |= KF_SMEP;
if (ExtFlags.Ebx.Bits.FSGSBASE) FeatureBits |= KF_RDWRFSGSBASE;
if (ExtFlags.Ebx.Bits.SMAP) FeatureBits |= KF_SMAP;
if (ExtFlags.Ebx.Bits.AVX2) FeatureBits |= KF_AVX2;
if (ExtFlags.Ebx.Bits.AVX512F) FeatureBits |= KF_AVX512F;
}
/* Check if CPUID_EXTENDED_STATE (0x0D) is supported */

9
ntoskrnl/ke/amd64/kiinit.c
View file

@ -399,9 +399,12 @@ KiInitializeKernelMachineDependent(
(FeatureBits & KF_SSE4_1) ? TRUE : FALSE;
SharedUserData->ProcessorFeatures[PF_SSE4_2_INSTRUCTIONS_AVAILABLE] =
(FeatureBits & KF_SSE4_2) ? TRUE : FALSE;
SharedUserData->ProcessorFeatures[PF_AVX_INSTRUCTIONS_AVAILABLE] = FALSE; // FIXME
SharedUserData->ProcessorFeatures[PF_AVX2_INSTRUCTIONS_AVAILABLE] = FALSE; // FIXME
SharedUserData->ProcessorFeatures[PF_AVX512F_INSTRUCTIONS_AVAILABLE] = FALSE; // FIXME
SharedUserData->ProcessorFeatures[PF_AVX_INSTRUCTIONS_AVAILABLE] =
(FeatureBits & KF_AVX) ? TRUE : FALSE;
SharedUserData->ProcessorFeatures[PF_AVX2_INSTRUCTIONS_AVAILABLE] =
(FeatureBits & KF_AVX2) ? TRUE : FALSE;
SharedUserData->ProcessorFeatures[PF_AVX512F_INSTRUCTIONS_AVAILABLE] =
(FeatureBits & KF_AVX512F) ? TRUE : FALSE;
/* Set the default NX policy (opt-in) */
SharedUserData->NXSupportPolicy = NX_SUPPORT_POLICY_OPTIN;

5
sdk/include/ndk/amd64/ketypes.h
View file

@ -73,6 +73,11 @@ Author:
#define KF_SSE4_1 0x0001000000000000ULL
#define KF_SSE4_2 0x0002000000000000ULL
// Hacks
#define KF_AVX 0x1000000000000000ULL
#define KF_AVX2 0x2000000000000000ULL
#define KF_AVX512F 0x4000000000000000ULL
#define KF_XSAVEOPT_BIT 15 // From ksamd64.inc (0x0F -> 0x8000)
#define KF_XSTATE_BIT 23 // From ksamd64.inc (0x17 -> 0x800000)
#define KF_RDWRFSGSBASE_BIT 28 // From ksamd64.inc (0x1C -> 0x10000000)