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Add constant for the DE_CFG MSR on AMD CPUs.

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Reported by:	Patrick Mooney <pmooney@pfmooney.com>
MFC after:	2 weeks
Differential Revision:	https://reviews.freebsd.org/D25885
This commit is contained in:
John Baldwin 2020-09-11 20:32:40 +00:00
parent d58ff30aca
commit d8dc46f6e9
2 changed files with 4 additions and 3 deletions
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6
sys/amd64/amd64/initcpu.c
View File

@ -86,7 +86,7 @@ init_amd(void)
case 0x10:
case 0x12:
if ((cpu_feature2 & CPUID2_HV) == 0)
wrmsr(0xc0011029, rdmsr(0xc0011029) | 1);
wrmsr(MSR_DE_CFG, rdmsr(MSR_DE_CFG) | 1);
break;
}
@ -135,9 +135,9 @@ init_amd(void)
if (CPUID_TO_FAMILY(cpu_id) == 0x17 && CPUID_TO_MODEL(cpu_id) == 0x1 &&
(cpu_feature2 & CPUID2_HV) == 0) {
/* 1021 */
msr = rdmsr(0xc0011029);
msr = rdmsr(MSR_DE_CFG);
msr |= 0x2000;
wrmsr(0xc0011029, msr);
wrmsr(MSR_DE_CFG, msr);
/* 1033 */
msr = rdmsr(MSR_LS_CFG);

1
sys/x86/include/specialreg.h
View File

@ -1138,6 +1138,7 @@
#define MSR_EXTFEATURES 0xc0011005 /* Extended CPUID Features override */
#define MSR_LS_CFG 0xc0011020
#define MSR_IC_CFG 0xc0011021 /* Instruction Cache Configuration */
#define MSR_DE_CFG 0xc0011029 /* Decode Configuration */
/* MSR_VM_CR related */
#define VM_CR_SVMDIS 0x10 /* SVM: disabled by BIOS */