diff options
Diffstat (limited to 'OvmfPkg/IntelTdx/Sec/SecMain.c')
| -rw-r--r-- | OvmfPkg/IntelTdx/Sec/SecMain.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/OvmfPkg/IntelTdx/Sec/SecMain.c b/OvmfPkg/IntelTdx/Sec/SecMain.c index 4e750755bf..6eeae09e3b 100644 --- a/OvmfPkg/IntelTdx/Sec/SecMain.c +++ b/OvmfPkg/IntelTdx/Sec/SecMain.c @@ -26,6 +26,8 @@ #include <Library/TdxHelperLib.h>
#include <Library/CcProbeLib.h>
#include <Library/PeilessStartupLib.h>
+#include <Register/Intel/ArchitecturalMsr.h>
+#include <Register/Intel/Cpuid.h>
#define SEC_IDT_ENTRY_COUNT 34
@@ -47,6 +49,31 @@ IA32_IDT_GATE_DESCRIPTOR mIdtEntryTemplate = { }
};
+//
+// Enable MTRR early, set default type to write back.
+// Needed to make sure caching is enabled,
+// without this lzma decompress can be very slow.
+//
+STATIC
+VOID
+SecMtrrSetup (
+ VOID
+ )
+{
+ CPUID_VERSION_INFO_EDX Edx;
+ MSR_IA32_MTRR_DEF_TYPE_REGISTER DefType;
+
+ AsmCpuid (CPUID_VERSION_INFO, NULL, NULL, NULL, &Edx.Uint32);
+ if (!Edx.Bits.MTRR) {
+ return;
+ }
+
+ DefType.Uint64 = AsmReadMsr64 (MSR_IA32_MTRR_DEF_TYPE);
+ DefType.Bits.Type = 6; /* write back */
+ DefType.Bits.E = 1; /* enable */
+ AsmWriteMsr64 (MSR_IA32_MTRR_DEF_TYPE, DefType.Uint64);
+}
+
VOID
EFIAPI
SecCoreStartupWithStack (
@@ -203,6 +230,11 @@ SecCoreStartupWithStack ( InitializeApicTimer (0, MAX_UINT32, TRUE, 5);
DisableApicTimerInterrupt ();
+ //
+ // Initialize MTRR
+ //
+ SecMtrrSetup ();
+
PeilessStartup (&SecCoreData);
ASSERT (FALSE);
|