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[NTOS:CM] Do not create ProcessorNameString value if there is no Brand String

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If the CPU does support CPUID instruction but does not have the Brand String,
the legacy name detection should be performed either in CIM_Processor (WMI),
in the Processor device driver, or in the application itself.

The deleted Intel CPU name detection code can go to the WMI at some point.
In fact Windows XP and 2003 kernels do not have any strings of that kind.

This effectively reverts the hack committed 6 years ago in 7a985425 (r63798)
that was intended to workaround CORE-7952.

CORE-17413
This commit is contained in:
Stanislav Motylkov 2020-12-30 03:24:06 +03:00
parent c57d0b7b98
commit f234cb6e59
No known key found for this signature in database
GPG key ID: AFE513258CBA9E92
1 changed files with 3 additions and 115 deletions
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118
ntoskrnl/config/i386/cmhardwr.c
View file

@ -226,99 +226,6 @@ Match:
return TRUE;
}
VOID
NTAPI
CmpGetIntelBrandString(OUT PCHAR CpuString)
{
CPU_INFO CpuInfo;
ULONG BrandId, Signature;
/* Get the Brand Id */
KiCpuId(&CpuInfo, 0x00000001);
Signature = CpuInfo.Eax;
BrandId = CpuInfo.Ebx & 0xFF;
switch (BrandId)
{
case 0x01:
strcpy(CpuString, "Intel(R) Celeron(R) processor");
break;
case 0x02:
case 0x04:
strcpy(CpuString, "Intel(R) Pentium(R) III processor");
break;
case 0x03:
if(Signature == 0x000006B1)
strcpy(CpuString, "Intel(R) Celeron(R) processor");
else
strcpy(CpuString, "Intel(R) Pentium(R) III Xeon(R) processor");
break;
case 0x06:
strcpy(CpuString, "Mobile Intel(R) Pentium(R) III Processor-M");
break;
case 0x08:
if(Signature >= 0x00000F13)
strcpy(CpuString, "Intel(R) Genuine Processor");
else
strcpy(CpuString, "Intel(R) Pentium(R) 4 processor");
break;
case 0x09:
strcpy(CpuString, "Intel(R) Pentium(R) 4 processor");
break;
case 0x0B:
if(Signature >= 0x00000F13)
strcpy(CpuString, "Intel(R) Xeon(R) processor");
else
strcpy(CpuString, "Intel(R) Xeon(R) processor MP");
break;
case 0x0C:
strcpy(CpuString, "Intel(R) Xeon(R) processor MP");
break;
case 0x0E:
if(Signature >= 0x00000F13)
strcpy(CpuString, "Mobile Intel(R) Pentium(R) 4 processor-M");
else
strcpy(CpuString, "Intel(R) Xeon(R) processor");
break;
case 0x12:
strcpy(CpuString, "Intel(R) Celeron(R) M processor");
break;
case 0x07:
case 0x0F:
case 0x13:
case 0x17:
strcpy(CpuString, "Mobile Intel(R) Celeron(R) processor");
break;
case 0x0A:
case 0x14:
strcpy(CpuString, "Intel(R) Celeron(R) Processor");
break;
case 0x15:
strcpy(CpuString, "Mobile Genuine Intel(R) Processor");
break;
case 0x16:
strcpy(CpuString, "Intel(R) Pentium(R) M processor");
break;
default:
strcpy(CpuString, "Unknown Intel processor");
}
}
VOID
NTAPI
CmpGetVendorString(IN PKPRCB Prcb, OUT PCHAR CpuString)
{
/* Check if we have a Vendor String */
if (Prcb->VendorString[0])
{
strcpy(CpuString, Prcb->VendorString);
}
else
{
strcpy(CpuString, "Unknown x86 processor");
}
}
NTSTATUS
NTAPI
CmpInitializeMachineDependentConfiguration(IN PLOADER_PARAMETER_BLOCK LoaderBlock)
@ -332,7 +239,7 @@ CmpInitializeMachineDependentConfiguration(IN PLOADER_PARAMETER_BLOCK LoaderBloc
CONFIGURATION_COMPONENT_DATA ConfigData;
CHAR Buffer[128];
CPU_INFO CpuInfo;
ULONG VendorId, ExtendedId;
ULONG ExtendedId;
PKPRCB Prcb;
USHORT IndexTable[MaximumType + 1] = {0};
ANSI_STRING TempString;
@ -527,9 +434,8 @@ CmpInitializeMachineDependentConfiguration(IN PLOADER_PARAMETER_BLOCK LoaderBloc
KeSetSystemAffinityThread(Prcb->SetMember);
if (!Prcb->CpuID)
{
/* Uh oh, no CPUID! */
PartialString = CpuString;
CmpGetVendorString(Prcb, PartialString);
/* Uh oh, no CPUID! Should not happen as we don't support 80386 and older 80486 */
ASSERT(FALSE);
}
else
{
@ -556,24 +462,6 @@ CmpInitializeMachineDependentConfiguration(IN PLOADER_PARAMETER_BLOCK LoaderBloc
/* Null-terminate it */
CpuString[47] = ANSI_NULL;
}
else
{
KiCpuId(&CpuInfo, 0x00000000);
VendorId = CpuInfo.Ebx;
PartialString = CpuString;
switch (VendorId)
{
case 'uneG': /* Intel */
CmpGetIntelBrandString(PartialString);
break;
case 'htuA': /* AMD */
/* FIXME */
CmpGetVendorString(Prcb, PartialString);
break;
default:
CmpGetVendorString(Prcb, PartialString);
}
}
}
/* Go back to user affinity */