Add MSR and bit definitions for SPEC_CTRL, PRED_CMD and ARCH_CAPABILITIES. See Intel's 336996-Speculative-Execution-Side-Channel-Mitigations.pdf
Signed-off-by: David Woodhouse <d...@amazon.co.uk> --- arch/x86/include/asm/msr-index.h | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/arch/x86/include/asm/msr-index.h b/arch/x86/include/asm/msr-index.h index fa11fb1..eb83ff1 100644 --- a/arch/x86/include/asm/msr-index.h +++ b/arch/x86/include/asm/msr-index.h @@ -39,6 +39,13 @@ /* Intel MSRs. Some also available on other CPUs */ +#define MSR_IA32_SPEC_CTRL 0x00000048 /* Speculation Control */ +#define SPEC_CTRL_IBRS (1 << 0) /* Indirect Branch Restricted Speculation */ +#define SPEC_CTRL_STIBP (1 << 1) /* Single Thread Indirect Branch Predictors */ + +#define MSR_IA32_PRED_CMD 0x00000049 /* Prediction Command */ +#define PRED_CMD_IBPB (1 << 0) /* Indirect Branch Prediction Barrier */ + #define MSR_PPIN_CTL 0x0000004e #define MSR_PPIN 0x0000004f @@ -57,6 +64,11 @@ #define SNB_C3_AUTO_UNDEMOTE (1UL << 28) #define MSR_MTRRcap 0x000000fe + +#define MSR_IA32_ARCH_CAPABILITIES 0x0000010a +#define ARCH_CAP_RDCL_NO (1 << 0) /* Not susceptible to Meltdown */ +#define ARCH_CAP_IBRS_ALL (1 << 1) /* Enhanced IBRS support */ + #define MSR_IA32_BBL_CR_CTL 0x00000119 #define MSR_IA32_BBL_CR_CTL3 0x0000011e -- 2.7.4
