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Add CPU features and fix CPU vendor #2

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Ghost wants to merge 5 commits from (deleted):prcb-cpu-features into master
pull from: (deleted):prcb-cpu-features
merge into: xt-sys:master
Conversation 3 Commits 5 Files Changed 8 +358 -45
8 changed files with 358 additions and 45 deletions
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97
sdk/xtdk/amd64/artypes.h
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@ -110,11 +110,16 @@
#define X86_EFLAGS_VIP_MASK 0x00100000
#define X86_EFLAGS_ID_MASK 0x00200000
/* CPUID vendor names */
#define CPUID_VENDOR_NAME_AMD "AuthenticAMD"
#define CPUID_VENDOR_NAME_INTEL "GenuineIntel"
/* CPU vendor enumeration list */
typedef enum _CPU_VENDOR
{
CPU_VENDOR_AMD = 0x68747541,
belliash commented 2023-11-27 19:25:51 +01:00
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Why do we change the values in CPU_VENDOR enum?

Why do we change the values in CPU_VENDOR enum?
Ghost commented 2023-11-27 20:15:32 +01:00
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The modifications were made to enhance code readability and maintainability, I specifically targeted removing magic numbers, and, to introduce a specific value (CPU_VENDOR_INVALID) to handle cases where the CPU vendor is in an invalid state.

The modifications were made to enhance code readability and maintainability, I specifically targeted removing magic numbers, and, to introduce a specific value (CPU_VENDOR_INVALID) to handle cases where the CPU vendor is in an invalid state.
belliash commented 2023-11-27 20:19:42 +01:00
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That magic numbers have some meaning: HEX(68747541) = STR(Auth)

That magic numbers have some meaning: HEX(68747541) = STR(Auth)
Ghost commented 2023-11-27 21:09:25 +01:00
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I know. Why shouldn't we change the values in CPU_VENDOR enum?

I know. Why shouldn't we change the values in CPU_VENDOR enum?
CPU_VENDOR_INTEL = 0x756e6547,
CPU_VENDOR_INVALID,
CPU_VENDOR_AMD,
CPU_VENDOR_INTEL,
CPU_VENDOR_UNKNOWN = 0xFFFFFFFF
} CPU_VENDOR, *PCPU_VENDOR;
@ -144,7 +149,7 @@ typedef enum _CPUID_FEATURES
CPUID_FEATURES_ECX_X2APIC = 1 << 21,
CPUID_FEATURES_ECX_MOVBE = 1 << 22,
CPUID_FEATURES_ECX_POPCNT = 1 << 23,
CPUID_FEATURES_ECX_TSC = 1 << 24,
CPUID_FEATURES_ECX_TSC_DEADLINE = 1 << 24,
CPUID_FEATURES_ECX_AES = 1 << 25,
CPUID_FEATURES_ECX_XSAVE = 1 << 26,
CPUID_FEATURES_ECX_OSXSAVE = 1 << 27,
@ -184,6 +189,92 @@ typedef enum _CPUID_FEATURES
CPUID_FEATURES_EDX_PBE = 1 << 31
} CPUID_FEATURES, *PCPUID_FEATURES;
Ghost marked this conversation as resolved Outdated
belliash commented 2023-11-20 14:51:18 +01:00
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UINT, or maybe something smaller if just one bit used.

UINT, or maybe something smaller if just one bit used.
Ghost commented 2023-11-21 20:43:03 +01:00
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Using BYTE instead of unsigned int for the bitfield

Using BYTE instead of unsigned int for the bitfield
/* CPU features, as reported by CPUID instruction */
typedef union _CPU_FEATURES
{
UINT64 Value;
union
belliash commented 2023-11-27 19:28:52 +01:00
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It is not guaranteed that enum has unsigned underlying type.

It is not guaranteed that enum has unsigned underlying type.
Ghost commented 2023-11-27 20:18:18 +01:00
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You pointed the struct in this case, was this a mis-comment?

You pointed the struct in this case, was this a mis-comment?
belliash commented 2023-11-27 20:21:25 +01:00
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No, it's not a mistake. BOOLEAN is defined as enum.

No, it's not a mistake. BOOLEAN is defined as enum.
Ghost commented 2023-11-27 20:58:13 +01:00
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May we define BOOLEAN as enum : BYTE?
https://learn.microsoft.com/en-us/windows/win32/winprog/windows-data-types

May we define `BOOLEAN as enum : BYTE`? https://learn.microsoft.com/en-us/windows/win32/winprog/windows-data-types
Ghost commented 2023-11-27 22:08:08 +01:00
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Swapped all BOOLEAN on the structure with BYTE

Swapped all BOOLEAN on the structure with BYTE
{
UINT32 Ecx;
UINT32 ExtendedFeatures;
struct
{
BYTE SSE3 : 1;
BYTE PCLMUL : 1;
BYTE DTES64 : 1;
BYTE MONITOR : 1;
BYTE DS_CPL : 1;
BYTE VMX : 1;
BYTE SMX : 1;
BYTE EST : 1;
BYTE TM2 : 1;
BYTE SSSE3 : 1;
BYTE CID : 1;
BYTE SDBG : 1;
BYTE FMA : 1;
BYTE CX16 : 1;
BYTE XTPR : 1;
BYTE PDCM : 1;
BYTE Reserved4 : 1; // Bit 16 is reserved
BYTE PCID : 1;
BYTE DCA : 1;
BYTE SSE4_1 : 1;
BYTE SSE4_2 : 1;
BYTE X2APIC : 1;
BYTE MOVBE : 1;
BYTE POPCNT : 1;
BYTE TSC_DEADLINE : 1;
BYTE AES : 1;
BYTE XSAVE : 1;
BYTE OSXSAVE : 1;
BYTE AVX : 1;
BYTE F16C : 1;
BYTE RDRAND : 1;
BYTE HYPERVISOR : 1;
};
};
union
{
UINT32 Edx;
UINT32 Features;
struct
{
BYTE FPU : 1;
BYTE VME : 1;
BYTE DE : 1;
BYTE PSE : 1;
BYTE TSC : 1;
BYTE MSR : 1;
BYTE PAE : 1;
BYTE MCE : 1;
BYTE CX8 : 1;
BYTE APIC : 1;
BYTE Reserved1 : 1; // Bit 10 is reserved
BYTE SEP : 1;
BYTE MTRR : 1;
BYTE PGE : 1;
BYTE MCA : 1;
BYTE CMOV : 1;
BYTE PAT : 1;
BYTE PSE36 : 1;
BYTE PSN : 1;
BYTE CLFLUSH : 1;
BYTE Reserved2 : 1; // Bit 20 is reserved
BYTE DS : 1;
BYTE ACPI : 1;
BYTE MMX : 1;
BYTE FXSR : 1;
belliash commented 2023-11-27 19:30:00 +01:00
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Any reason for using UINT64 here?

Any reason for using UINT64 here?
Ghost commented 2023-11-27 20:21:05 +01:00
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I've specifically added that to access the whole value AsUINT64, maybe it's unnecesary right now, but added it as a plus. I took some inspiration from this code, that does the same:
xtchain/binaries/x86_64-w64-mingw32/include/winhvplatformdefs.h:29
(look for typedef union WHV_CAPABILITY_FEATURES)

I've specifically added that to access the whole value AsUINT64, maybe it's unnecesary right now, but added it as a plus. I took some inspiration from this code, that does the same: xtchain/binaries/x86_64-w64-mingw32/include/winhvplatformdefs.h:29 (look for typedef union WHV_CAPABILITY_FEATURES)
Ghost commented 2023-11-27 22:08:21 +01:00
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Swapped all BOOLEAN on the structure with BYTE

Swapped all BOOLEAN on the structure with BYTE
BYTE SSE : 1;
BYTE SSE2 : 1;
BYTE SS : 1;
BYTE HTT : 1;
BYTE TM : 1;
BYTE Reserved3 : 1; // Bit 30 is reserved
BYTE PBE : 1;
};
};
} CPU_FEATURES, *PCPU_FEATURES;
/* CPUID requests */
typedef enum _CPUID_REQUESTS
{

1
sdk/xtdk/amd64/ketypes.h
View File

@ -522,6 +522,7 @@ typedef struct _KPROCESSOR_CONTROL_BLOCK
ULONG64 RspBase;
ULONG_PTR SetMember;
CPU_IDENTIFICATION CpuId;
CPU_FEATURES CpuFeatures;
KPROCESSOR_STATE ProcessorState;
KDPC_DATA DpcData[2];
PVOID DpcStack;

97
sdk/xtdk/i686/artypes.h
View File

@ -61,11 +61,16 @@
#define SEGMENT_FS 0x64
#define SEGMENT_GS 0x65
/* CPUID vendor names */
#define CPUID_VENDOR_NAME_AMD "AuthenticAMD"
#define CPUID_VENDOR_NAME_INTEL "GenuineIntel"
/* CPU vendor enumeration list */
typedef enum _CPU_VENDOR
{
CPU_VENDOR_AMD = 0x68747541,
belliash commented 2023-11-27 19:33:43 +01:00
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Why do we change the values in CPU_VENDOR enum?

Why do we change the values in CPU_VENDOR enum?
Ghost commented 2023-11-27 20:16:14 +01:00
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The modifications were made to enhance code readability and maintainability, I specifically targeted removing magic numbers, and, to introduce a specific value (CPU_VENDOR_INVALID) to handle cases where the CPU vendor is in an invalid state.

The modifications were made to enhance code readability and maintainability, I specifically targeted removing magic numbers, and, to introduce a specific value (CPU_VENDOR_INVALID) to handle cases where the CPU vendor is in an invalid state.
belliash commented 2023-11-27 20:23:02 +01:00
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That magic numbers have some meaning, eg: HEX(68747541) = STR(Auth)

That magic numbers have some meaning, eg: HEX(68747541) = STR(Auth)
Ghost commented 2023-11-27 21:09:51 +01:00
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I know. Why shouldn't we change the values in CPU_VENDOR enum?

I know. Why shouldn't we change the values in CPU_VENDOR enum?
CPU_VENDOR_INTEL = 0x756e6547,
CPU_VENDOR_INVALID,
CPU_VENDOR_AMD,
CPU_VENDOR_INTEL,
CPU_VENDOR_UNKNOWN = 0xFFFFFFFF
} CPU_VENDOR, *PCPU_VENDOR;
@ -95,7 +100,7 @@ typedef enum _CPUID_FEATURES
CPUID_FEATURES_ECX_X2APIC = 1 << 21,
CPUID_FEATURES_ECX_MOVBE = 1 << 22,
CPUID_FEATURES_ECX_POPCNT = 1 << 23,
CPUID_FEATURES_ECX_TSC = 1 << 24,
CPUID_FEATURES_ECX_TSC_DEADLINE = 1 << 24,
CPUID_FEATURES_ECX_AES = 1 << 25,
CPUID_FEATURES_ECX_XSAVE = 1 << 26,
CPUID_FEATURES_ECX_OSXSAVE = 1 << 27,
@ -135,6 +140,92 @@ typedef enum _CPUID_FEATURES
CPUID_FEATURES_EDX_PBE = 1 << 31
} CPUID_FEATURES, *PCPUID_FEATURES;
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belliash commented 2023-11-20 14:51:27 +01:00
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UINT, or maybe something smaller if just one bit used.

UINT, or maybe something smaller if just one bit used.
Ghost commented 2023-11-21 20:43:29 +01:00
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Using BYTE instead of unsigned int for the bitfield

Using BYTE instead of unsigned int for the bitfield
/* CPU features, as reported by CPUID instruction */
typedef union _CPU_FEATURES
{
UINT64 Value;
union
belliash commented 2023-11-27 19:32:49 +01:00
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It is not guaranteed that enum has unsigned underlying type.

It is not guaranteed that enum has unsigned underlying type.
Ghost commented 2023-11-27 20:18:39 +01:00
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You pointed the struct in this case, was this a mis-comment?

You pointed the struct in this case, was this a mis-comment?
{
UINT32 Ecx;
UINT32 ExtendedFeatures;
struct
{
BYTE SSE3 : 1;
BYTE PCLMUL : 1;
BYTE DTES64 : 1;
BYTE MONITOR : 1;
BYTE DS_CPL : 1;
BYTE VMX : 1;
BYTE SMX : 1;
BYTE EST : 1;
BYTE TM2 : 1;
BYTE SSSE3 : 1;
BYTE CID : 1;
BYTE SDBG : 1;
BYTE FMA : 1;
BYTE CX16 : 1;
BYTE XTPR : 1;
BYTE PDCM : 1;
BYTE Reserved1 : 1; // Bit 16 is reserved
BYTE PCID : 1;
BYTE DCA : 1;
BYTE SSE4_1 : 1;
BYTE SSE4_2 : 1;
BYTE X2APIC : 1;
BYTE MOVBE : 1;
BYTE POPCNT : 1;
BYTE TSC_DEADLINE : 1;
BYTE AES : 1;
BYTE XSAVE : 1;
BYTE OSXSAVE : 1;
BYTE AVX : 1;
BYTE F16C : 1;
BYTE RDRAND : 1;
BYTE HYPERVISOR : 1;
};
};
union
{
UINT32 Edx;
UINT32 Features;
struct
{
BYTE FPU : 1;
BYTE VME : 1;
BYTE DE : 1;
BYTE PSE : 1;
BYTE TSC : 1;
BYTE MSR : 1;
BYTE PAE : 1;
BYTE MCE : 1;
BYTE CX8 : 1;
BYTE APIC : 1;
BYTE Reserved2 : 1; // Bit 10 is reserved
BYTE SEP : 1;
BYTE MTRR : 1;
BYTE PGE : 1;
BYTE MCA : 1;
BYTE CMOV : 1;
BYTE PAT : 1;
BYTE PSE36 : 1;
BYTE PSN : 1;
BYTE CLFLUSH : 1;
belliash commented 2023-11-27 19:33:24 +01:00
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Any reason for using UINT64 here?

Any reason for using UINT64 here?
Ghost commented 2023-11-27 20:04:15 +01:00
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I've specifically added that to access the whole value AsUINT64, maybe it's unnecesary right now, but added it as a plus. I took some inspiration from this code, that does the same:
xtchain/binaries/x86_64-w64-mingw32/include/winhvplatformdefs.h:29
(look for typedef union WHV_CAPABILITY_FEATURES)

I've specifically added that to access the whole value `AsUINT64`, maybe it's unnecesary right now, but added it as a plus. I took some inspiration from this code, that does the same: xtchain/binaries/x86_64-w64-mingw32/include/winhvplatformdefs.h:29 (look for `typedef union WHV_CAPABILITY_FEATURES`)
belliash commented 2023-11-27 20:25:07 +01:00
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I didn't notice the difference between i686 and amd64. In one case it is a structure containing 2 unions. Here we got 1 bit structure. Does it mean, that CPUID returns different data across archs?

I didn't notice the difference between i686 and amd64. In one case it is a structure containing 2 unions. Here we got 1 bit structure. Does it mean, that CPUID returns different data across archs?
Ghost commented 2023-11-27 21:10:45 +01:00
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This is a small regression on local commits, I'll push the final structure.

This is a small regression on local commits, I'll push the final structure.
Ghost commented 2023-11-27 22:07:31 +01:00
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Fixed on last commit.

Fixed on last commit.
BYTE Reserved3 : 1; // Bit 20 is reserved
BYTE DS : 1;
BYTE ACPI : 1;
BYTE MMX : 1;
BYTE FXSR : 1;
BYTE SSE : 1;
BYTE SSE2 : 1;
BYTE SS : 1;
BYTE HTT : 1;
BYTE TM : 1;
BYTE Reserved4 : 1; // Bit 30 is reserved
BYTE PBE : 1;
};
};
} CPU_FEATURES, *PCPU_FEATURES;
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belliash commented 2023-11-20 14:51:45 +01:00
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IMHO this should go to PROCESSOR_CONTROL_BLOCK.

IMHO this should go to PROCESSOR_CONTROL_BLOCK.
Ghost commented 2023-11-21 20:48:59 +01:00
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Moved to PROCESSOR_CONTROL_BLOCK

Moved to PROCESSOR_CONTROL_BLOCK
/* CPUID requests */
typedef enum _CPUID_REQUESTS
{

1
sdk/xtdk/i686/ketypes.h
View File

@ -461,6 +461,7 @@ typedef struct _KPROCESSOR_CONTROL_BLOCK
UCHAR Number;
ULONG_PTR SetMember;
CPU_IDENTIFICATION CpuId;
CPU_FEATURES CpuFeatures;
KPROCESSOR_STATE ProcessorState;
ULONG_PTR MultiThreadProcessorSet;
KDPC_DATA DpcData[2];

85
xtoskrnl/ar/amd64/procsup.c
View File

@ -108,8 +108,7 @@ ArSetGdtEntryBase(IN PKGDTENTRY Gdt,
}
/**
* Identifies processor type (vendor, model, stepping) as well as looks for available CPU features and stores them
* in Processor Control Block (PRCB).
* Sets the CPU vendor information in the processor control block (PRCB).
*
* @return This routine does not return any value.
*
@ -117,29 +116,62 @@ ArSetGdtEntryBase(IN PKGDTENTRY Gdt,
*/
XTAPI
VOID
ArpIdentifyProcessor(VOID)
ArpSetCpuVendor()
{
PKPROCESSOR_CONTROL_BLOCK Prcb;
CPUID_REGISTERS CpuRegisters;
CPUID_SIGNATURE CpuSignature;
/* Not fully implemented yet */
UNIMPLEMENTED;
UINT32 VendorNameBytes[3];
/* Get current processor control block */
Prcb = KeGetCurrentProcessorControlBlock();
/* Get CPU vendor by issueing CPUID instruction */
/* Get CPU vendor by issuing CPUID instruction */
RtlZeroMemory(&CpuRegisters, sizeof(CPUID_REGISTERS));
CpuRegisters.Leaf = CPUID_GET_VENDOR_STRING;
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belliash commented 2023-11-20 14:52:09 +01:00
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Why this needs to be so over-complicated? It should be possible to simply store data read from EBX, EDX and ECX registers.

Why this needs to be so over-complicated? It should be possible to simply store data read from EBX, EDX and ECX registers.
Ghost commented 2023-11-21 22:08:23 +01:00
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Simplified

XTAPI
VOID ArpSetCpuVendor(IN PKPROCESSOR_CONTROL_BLOCK Prcb,
                     IN CPUID_REGISTERS CpuRegisters) 
{
    *((UINT32 *)(Prcb->CpuId.VendorName))     = CpuRegisters.Ebx;
    *((UINT32 *)(Prcb->CpuId.VendorName + 4)) = CpuRegisters.Edx;
    *((UINT32 *)(Prcb->CpuId.VendorName + 8)) = CpuRegisters.Ecx;
    Prcb->CpuId.VendorName[12]                = '\0';
}
Simplified ```c XTAPI VOID ArpSetCpuVendor(IN PKPROCESSOR_CONTROL_BLOCK Prcb, IN CPUID_REGISTERS CpuRegisters) { *((UINT32 *)(Prcb->CpuId.VendorName)) = CpuRegisters.Ebx; *((UINT32 *)(Prcb->CpuId.VendorName + 4)) = CpuRegisters.Edx; *((UINT32 *)(Prcb->CpuId.VendorName + 8)) = CpuRegisters.Ecx; Prcb->CpuId.VendorName[12] = '\0'; } ```
ArCpuId(&CpuRegisters);
/* Store CPU vendor in processor control block */
Prcb->CpuId.Vendor = CpuRegisters.Ebx;
Prcb->CpuId.VendorName[0] = CpuRegisters.Ebx;
Prcb->CpuId.VendorName[4] = CpuRegisters.Edx;
Prcb->CpuId.VendorName[8] = CpuRegisters.Ecx;
Prcb->CpuId.VendorName[12] = '\0';
/* Order CPU vendor name bytes */
VendorNameBytes[0] = CpuRegisters.Ebx;
VendorNameBytes[1] = CpuRegisters.Edx;
VendorNameBytes[2] = CpuRegisters.Ecx;
/* Copy CPU vendor name to processor control block */
RtlZeroMemory(&Prcb->CpuId.VendorName[0], 13);
RtlCopyMemory(&Prcb->CpuId.VendorName[0], &VendorNameBytes[0], 12);
/* Set CPU vendor on processor control block by comparing known vendor names */
if (RtlCompareMemory(&Prcb->CpuId.VendorName[0], CPUID_VENDOR_NAME_AMD, 12) == 12)
{
Prcb->CpuId.Vendor = CPU_VENDOR_AMD;
}
else if (RtlCompareMemory(&Prcb->CpuId.VendorName[0], CPUID_VENDOR_NAME_INTEL, 12) == 12)
{
Prcb->CpuId.Vendor = CPU_VENDOR_INTEL;
}
else
{
Prcb->CpuId.Vendor = CPU_VENDOR_UNKNOWN;
}
}
/**
* Sets the CPU features information in the processor control block (PRCB).
*
* @return This routine does not return any value.
*
* @since XT 1.0
*/
XTAPI
VOID
ArpSetCpuFeatures(VOID)
{
PKPROCESSOR_CONTROL_BLOCK Prcb;
CPUID_REGISTERS CpuRegisters;
CPUID_SIGNATURE CpuSignature;
UINT32 FeatureArray[2];
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belliash commented 2023-11-20 14:52:12 +01:00
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All these ifdef statements are completely useless, as DebugPrint on non-debug build is just a NOP.

All these `ifdef ` statements are completely useless, as DebugPrint on non-debug build is just a NOP.
/* Get current processor control block */
Prcb = KeGetCurrentProcessorControlBlock();
/* Get CPU features */
RtlZeroMemory(&CpuRegisters, sizeof(CPUID_REGISTERS));
@ -157,6 +189,7 @@ ArpIdentifyProcessor(VOID)
{
/* AMD CPU */
Prcb->CpuId.Family = Prcb->CpuId.Family + CpuSignature.ExtendedFamily;
if (Prcb->CpuId.Model == 0xF)
{
Prcb->CpuId.Model = Prcb->CpuId.Model + (CpuSignature.ExtendedModel << 4);
@ -181,7 +214,29 @@ ArpIdentifyProcessor(VOID)
Prcb->CpuId.Vendor = CPU_VENDOR_UNKNOWN;
}
/* TODO: Store a list of CPU features in processor control block */
/* Store CPU features in processor control block */
FeatureArray[0] = CpuRegisters.Edx;
FeatureArray[1] = CpuRegisters.Ecx;
RtlCopyMemory(&Prcb->CpuFeatures, &FeatureArray[0], sizeof(UINT64));
}
/**
* Identifies processor type (vendor, model, stepping) as well as looks for available CPU features and stores them
* in Processor Control Block (PRCB).
*
* @return This routine does not return any value.
*
* @since XT 1.0
*/
XTAPI
VOID
ArpIdentifyProcessor(VOID)
{
/* Set CPU vendor */
ArpSetCpuVendor();
/* Set CPU features */
ArpSetCpuFeatures();
}
/**

86
xtoskrnl/ar/i686/procsup.c
View File

@ -105,8 +105,7 @@ ArSetGdtEntryBase(IN PKGDTENTRY Gdt,
}
/**
* Identifies processor type (vendor, model, stepping) as well as looks for available CPU features and stores them
* in Processor Control Block (PRCB).
* Sets the CPU vendor information in the processor control block (PRCB).
*
* @return This routine does not return any value.
*
@ -114,14 +113,11 @@ ArSetGdtEntryBase(IN PKGDTENTRY Gdt,
*/
XTAPI
VOID
ArpIdentifyProcessor(VOID)
ArpSetCpuVendor()
{
PKPROCESSOR_CONTROL_BLOCK Prcb;
CPUID_REGISTERS CpuRegisters;
CPUID_SIGNATURE CpuSignature;
/* Not fully implemented yet */
UNIMPLEMENTED;
UINT32 VendorNameBytes[3];
/* Get current processor control block */
Prcb = KeGetCurrentProcessorControlBlock();
@ -131,12 +127,48 @@ ArpIdentifyProcessor(VOID)
CpuRegisters.Leaf = CPUID_GET_VENDOR_STRING;
ArCpuId(&CpuRegisters);
/* Store CPU vendor in processor control block */
Prcb->CpuId.Vendor = CpuRegisters.Ebx;
Prcb->CpuId.VendorName[0] = CpuRegisters.Ebx;
Prcb->CpuId.VendorName[4] = CpuRegisters.Edx;
Prcb->CpuId.VendorName[8] = CpuRegisters.Ecx;
Prcb->CpuId.VendorName[12] = '\0';
/* Fix CPU vendor name bytes order */
VendorNameBytes[0] = CpuRegisters.Ebx;
VendorNameBytes[1] = CpuRegisters.Edx;
VendorNameBytes[2] = CpuRegisters.Ecx;
/* Copy CPU vendor name to processor control block */
RtlZeroMemory(&Prcb->CpuId.VendorName[0], 13);
RtlCopyMemory(&Prcb->CpuId.VendorName[0], &VendorNameBytes[0], 12);
/* Set CPU vendor on processor control block by comparing known vendor names */
if (RtlCompareMemory(&Prcb->CpuId.VendorName[0], CPUID_VENDOR_NAME_AMD, 12) == 12)
{
Prcb->CpuId.Vendor = CPU_VENDOR_AMD;
}
else if (RtlCompareMemory(&Prcb->CpuId.VendorName[0], CPUID_VENDOR_NAME_INTEL, 12) == 12)
{
Prcb->CpuId.Vendor = CPU_VENDOR_INTEL;
}
else
{
Prcb->CpuId.Vendor = CPU_VENDOR_UNKNOWN;
}
}
/**
* Sets the CPU features information in the processor control block (PRCB).
*
* @return This routine does not return any value.
*
* @since XT 1.0
*/
XTAPI
VOID
ArpSetCpuFeatures(VOID)
{
PKPROCESSOR_CONTROL_BLOCK Prcb;
CPUID_REGISTERS CpuRegisters;
CPUID_SIGNATURE CpuSignature;
UINT32 FeatureArray[2];
/* Get current processor control block */
Prcb = KeGetCurrentProcessorControlBlock();
/* Get CPU features */
RtlZeroMemory(&CpuRegisters, sizeof(CPUID_REGISTERS));
@ -149,11 +181,15 @@ ArpIdentifyProcessor(VOID)
Prcb->CpuId.Model = CpuSignature.Model;
Prcb->CpuId.Stepping = CpuSignature.Stepping;
/* Prcb->CpuId.Vendor print*/
DebugPrint(L"CPU Signature: %s\n", Prcb->CpuId.Vendor);
/* CPU vendor specific quirks */
if (Prcb->CpuId.Vendor == CPU_VENDOR_AMD)
{
/* AMD CPU */
Prcb->CpuId.Family = Prcb->CpuId.Family + CpuSignature.ExtendedFamily;
if (Prcb->CpuId.Model == 0xF)
{
Prcb->CpuId.Model = Prcb->CpuId.Model + (CpuSignature.ExtendedModel << 4);
@ -178,7 +214,29 @@ ArpIdentifyProcessor(VOID)
Prcb->CpuId.Vendor = CPU_VENDOR_UNKNOWN;
}
/* TODO: Store a list of CPU features in processor control block */
/* Store CPU features in processor control block */
FeatureArray[0] = CpuRegisters.Edx;
FeatureArray[1] = CpuRegisters.Ecx;
RtlCopyMemory(&Prcb->CpuFeatures, &FeatureArray[0], sizeof(UINT64));
}
/**
* Identifies processor type (vendor, model, stepping) as well as looks for available CPU features and stores them
* in Processor Control Block (PRCB).
*
* @return This routine does not return any value.
*
* @since XT 1.0
*/
XTAPI
VOID
ArpIdentifyProcessor(VOID)
{
/* Set CPU vendor */
ArpSetCpuVendor();
/* Set CPU features */
ArpSetCpuFeatures();
}
/**

8
xtoskrnl/includes/amd64/ar.h
View File

@ -288,4 +288,12 @@ ArpSetIdtGate(IN PKIDTENTRY Idt,
IN USHORT Ist,
IN USHORT Access);
XTAPI
VOID
ArpSetCpuVendor(VOID);
XTAPI
VOID
ArpSetCpuFeatures(VOID);
#endif /* __XTOSKRNL_AMD64_AR_H */

8
xtoskrnl/includes/i686/ar.h
View File

@ -284,4 +284,12 @@ XTAPI
VOID
ArpSetNonMaskableInterruptTssEntry(IN PKPROCESSOR_BLOCK ProcessorBlock);
XTAPI
VOID
ArpSetCpuVendor(VOID);
XTAPI
VOID
ArpSetCpuFeatures(VOID);
#endif /* __XTOSKRNL_I686_AR_H */