Commit ed2e8d49 authored by Daniel Sneddon's avatar Daniel Sneddon Committed by Thomas Gleixner
Browse files

KVM: x86: Add BHI_NO 



Intel processors that aren't vulnerable to BHI will set
MSR_IA32_ARCH_CAPABILITIES[BHI_NO] = 1;. Guests may use this BHI_NO bit to
determine if they need to implement BHI mitigations or not.  Allow this bit
to be passed to the guests.

Signed-off-by: default avatarDaniel Sneddon <daniel.sneddon@linux.intel.com>
Signed-off-by: default avatarPawan Gupta <pawan.kumar.gupta@linux.intel.com>
Signed-off-by: default avatarDaniel Sneddon <daniel.sneddon@linux.intel.com>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Reviewed-by: default avatarAlexandre Chartre <alexandre.chartre@oracle.com>
Reviewed-by: default avatarJosh Poimboeuf <jpoimboe@kernel.org>
parent 95a6ccbd

arch/x86/kvm/x86.c

+1 −1
Original line number Diff line number Diff line
@@ -1621,7 +1621,7 @@ static bool kvm_is_immutable_feature_msr(u32 msr) 
	 ARCH_CAP_PSCHANGE_MC_NO | ARCH_CAP_TSX_CTRL_MSR | ARCH_CAP_TAA_NO | \

	 ARCH_CAP_SBDR_SSDP_NO | ARCH_CAP_FBSDP_NO | ARCH_CAP_PSDP_NO | \

	 ARCH_CAP_FB_CLEAR | ARCH_CAP_RRSBA | ARCH_CAP_PBRSB_NO | ARCH_CAP_GDS_NO | \

	 ARCH_CAP_RFDS_NO | ARCH_CAP_RFDS_CLEAR)

	 ARCH_CAP_RFDS_NO | ARCH_CAP_RFDS_CLEAR | ARCH_CAP_BHI_NO)



static u64 kvm_get_arch_capabilities(void)

{