diff options
| author | Naresh G Solanki <naresh.solanki@intel.com> | 2018-04-02 21:49:51 +0530 |
|---|---|---|
| committer | Aaron Durbin <adurbin@chromium.org> | 2018-04-09 17:05:59 +0000 |
| commit | b10e96f1969bf7ab1a4c83abc484aa4873af950e (patch) | |
| tree | fd2559bf582cfdc307ce33e03eb715bafe5bbc89 /src/soc/intel/common | |
| parent | 68a1542692f5674704ece3c4716924f30947a2a3 (diff) | |
soc/intel/common: Add funtion to modify PAT & NXE bit
Add function to modify NXE bit & PAT.
BUG=None
BRANCH=None
TEST=Make sure build for Glkrvp is successful.
Change-Id: I265d6d5ca538496934a375eb8d99d52879522051
Signed-off-by: Naresh G Solanki <naresh.solanki@intel.com>
Reviewed-on: https://review.coreboot.org/25480
Reviewed-by: Sumeet R Pawnikar <sumeet.r.pawnikar@intel.com>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Subrata Banik <subrata.banik@intel.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/soc/intel/common')
| -rw-r--r-- | src/soc/intel/common/block/cpu/cpulib.c | 20 | ||||
| -rw-r--r-- | src/soc/intel/common/block/include/intelblocks/cpulib.h | 5 | ||||
| -rw-r--r-- | src/soc/intel/common/block/include/intelblocks/msr.h | 10 |
3 files changed, 35 insertions, 0 deletions
diff --git a/src/soc/intel/common/block/cpu/cpulib.c b/src/soc/intel/common/block/cpu/cpulib.c index 0d6dacc628..ed1ba0fa7b 100644 --- a/src/soc/intel/common/block/cpu/cpulib.c +++ b/src/soc/intel/common/block/cpu/cpulib.c @@ -314,3 +314,23 @@ void mca_configure(void) (msr_t) {.lo = 0xffffffff, .hi = 0xffffffff}); } } + +void set_nxe(uint8_t enable) +{ + msr_t msr = rdmsr(IA32_EFER); + + if (enable) + msr.lo |= EFER_NXE; + else + msr.lo &= ~EFER_NXE; + + wrmsr(IA32_EFER, msr); +} + +void set_pat(uint64_t pat) +{ + msr_t msr; + msr.lo = pat; + msr.hi = pat >> 32; + wrmsr(MSR_IA32_PAT, msr); +} diff --git a/src/soc/intel/common/block/include/intelblocks/cpulib.h b/src/soc/intel/common/block/include/intelblocks/cpulib.h index 34caf4c252..0c7f2c42d3 100644 --- a/src/soc/intel/common/block/include/intelblocks/cpulib.h +++ b/src/soc/intel/common/block/include/intelblocks/cpulib.h @@ -159,4 +159,9 @@ uint32_t cpu_get_max_turbo_ratio(void); /* Configure Machine Check Architecture support */ void mca_configure(void); +/* Set/Clear NXE bit in IA32_EFER MSR */ +void set_nxe(uint8_t enable); + +/* Set PAT MSR */ +void set_pat(uint64_t pat); #endif /* SOC_INTEL_COMMON_BLOCK_CPULIB_H */ diff --git a/src/soc/intel/common/block/include/intelblocks/msr.h b/src/soc/intel/common/block/include/intelblocks/msr.h index 22e8862e98..5cfce17894 100644 --- a/src/soc/intel/common/block/include/intelblocks/msr.h +++ b/src/soc/intel/common/block/include/intelblocks/msr.h @@ -72,6 +72,7 @@ #define PRMRR_PHYS_MASK_LOCK (1 << 10) #define PRMRR_PHYS_MASK_VALID (1 << 11) #define MSR_POWER_CTL 0x1fc +#define MSR_IA32_PAT 0x277 #define MSR_EVICT_CTL 0x2e0 #define MSR_SGX_OWNEREPOCH0 0x300 #define MSR_SGX_OWNEREPOCH1 0x301 @@ -142,4 +143,13 @@ #define SGX_RESOURCE_MASK_LO (0xfffff000UL) #define SGX_RESOURCE_MASK_HI (0xfffffUL) +/* Intel SDM: Table 2-1 + * IA-32 architectural MSR: Extended Feature Enable Register + */ +#define IA32_EFER 0xC0000080 +#define EFER_NXE (1 << 11) +#define EFER_LMA (1 << 10) +#define EFER_LME (1 << 8) +#define EFER_SCE (1 << 0) + #endif /* SOC_INTEL_COMMON_MSR_H */ |