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Initialize Page Attribute Table

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This commit is contained in:
Rafal Kupiec
2023-02-05 00:14:34 +01:00
parent 55cdae7c83
commit 5eaf7d63a3
4 changed files with 20 additions and 4 deletions
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7
xtoskrnl/ar/amd64/procsup.c
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@@ -209,6 +209,8 @@ XTAPI
VOID
ArpInitializeProcessorRegisters(VOID)
{
ULONGLONG PatAttributes;
/* Enable FXSAVE restore */
ArWriteControlRegister(4, ArReadControlRegister(4) | CR4_FXSR);
@@ -247,6 +249,11 @@ ArpInitializeProcessorRegisters(VOID)
/* Enable No-Execute (NXE) in EFER MSR */
ArWriteModelSpecificRegister(X86_MSR_EFER, ArReadModelSpecificRegister(X86_MSR_EFER) | X86_MSR_EFER_NXE);
/* Initialize Page Attribute Table */
PatAttributes = (PAT_TYPE_WB << 0) | (PAT_TYPE_USWC << 8) | (PAT_TYPE_WEAK_UC << 16) | (PAT_TYPE_STRONG_UC << 24) |
(PAT_TYPE_WB << 32) | (PAT_TYPE_USWC << 40) | (PAT_TYPE_WEAK_UC << 48) | (PAT_TYPE_STRONG_UC << 56);
ArWriteModelSpecificRegister(X86_MSR_PAT, PatAttributes);
}
/**