diff options
| author | Dave Airlie <airlied@redhat.com> | 2021-06-23 10:07:48 +1000 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2021-06-23 10:07:48 +1000 |
| commit | f45fbbb6d5cff29ddfc708676ec1c2496eed3a07 (patch) | |
| tree | 5496fee9f6b10da368aa49b03612061156e42d2f /arch/x86/mm/mem_encrypt_identity.c | |
| parent | d472b36efbf8a27dc8a80519db8b5a8caffe42b6 (diff) | |
| parent | 13311e74253fe64329390df80bed3f07314ddd61 (diff) | |
Backmerge tag 'v5.13-rc7' into drm-next
Backmerge Linux 5.13-rc7 to make some pulls from later bases apply,
and to bake in the conflicts so far.
Diffstat (limited to 'arch/x86/mm/mem_encrypt_identity.c')
| -rw-r--r-- | arch/x86/mm/mem_encrypt_identity.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/arch/x86/mm/mem_encrypt_identity.c b/arch/x86/mm/mem_encrypt_identity.c index a9639f663d25..470b20208430 100644 --- a/arch/x86/mm/mem_encrypt_identity.c +++ b/arch/x86/mm/mem_encrypt_identity.c @@ -504,10 +504,6 @@ void __init sme_enable(struct boot_params *bp) #define AMD_SME_BIT BIT(0) #define AMD_SEV_BIT BIT(1) - /* Check the SEV MSR whether SEV or SME is enabled */ - sev_status = __rdmsr(MSR_AMD64_SEV); - feature_mask = (sev_status & MSR_AMD64_SEV_ENABLED) ? AMD_SEV_BIT : AMD_SME_BIT; - /* * Check for the SME/SEV feature: * CPUID Fn8000_001F[EAX] @@ -519,11 +515,16 @@ void __init sme_enable(struct boot_params *bp) eax = 0x8000001f; ecx = 0; native_cpuid(&eax, &ebx, &ecx, &edx); - if (!(eax & feature_mask)) + /* Check whether SEV or SME is supported */ + if (!(eax & (AMD_SEV_BIT | AMD_SME_BIT))) return; me_mask = 1UL << (ebx & 0x3f); + /* Check the SEV MSR whether SEV or SME is enabled */ + sev_status = __rdmsr(MSR_AMD64_SEV); + feature_mask = (sev_status & MSR_AMD64_SEV_ENABLED) ? AMD_SEV_BIT : AMD_SME_BIT; + /* Check if memory encryption is enabled */ if (feature_mask == AMD_SME_BIT) { /* |