From: Robert Hoo <robert.hu@xxxxxxxxxxxxxxx> LAM feature is enumerated by CPUID.7.1:EAX.LAM[bit 26]. Expose the feature to userspace as the final step after the following supports: - CR4.LAM_SUP virtualization - CR3.LAM_U48 and CR3.LAM_U57 virtualization - Check and untag 64-bit linear address when LAM applies in instruction emulations and VMExit handlers. Exposing SGX LAM support is not supported yet. SGX LAM support is enumerated in SGX's own CPUID and there's no hard requirement that it must be supported when LAM is reported in CPUID leaf 0x7. Signed-off-by: Robert Hoo <robert.hu@xxxxxxxxxxxxxxx> Signed-off-by: Binbin Wu <binbin.wu@xxxxxxxxxxxxxxx> Reviewed-by: Jingqi Liu <jingqi.liu@xxxxxxxxx> Reviewed-by: Chao Gao <chao.gao@xxxxxxxxx> Reviewed-by: Kai Huang <kai.huang@xxxxxxxxx> Tested-by: Xuelian Guo <xuelian.guo@xxxxxxxxx> --- arch/x86/kvm/cpuid.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c index 7ebf3ce1bb5f..21d525b01d45 100644 --- a/arch/x86/kvm/cpuid.c +++ b/arch/x86/kvm/cpuid.c @@ -645,7 +645,7 @@ void kvm_set_cpu_caps(void) kvm_cpu_cap_mask(CPUID_7_1_EAX, F(AVX_VNNI) | F(AVX512_BF16) | F(CMPCCXADD) | F(FZRM) | F(FSRS) | F(FSRC) | - F(AMX_FP16) | F(AVX_IFMA) + F(AMX_FP16) | F(AVX_IFMA) | F(LAM) ); kvm_cpu_cap_init_kvm_defined(CPUID_7_1_EDX, -- 2.25.1
