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| author |  Tianyu Lan <tiala@microsoft.com>
| 2023-08-18 06:29:11 -0400 |
|---|---|---|
| committer |  Wei Liu <wei.liu@kernel.org>
| 2023-08-22 00:38:20 +0000 |
| commit | d6e2d652443751e290b2edb70173ec3c22f78fbe (patch) | |
| tree | 3474f50f6559470984ae59cc5b077dfc430b0573 /arch/x86/kernel | |
| parent | hv_balloon: Update the balloon driver to use the SBRM API (diff) | |
| download | linux-d6e2d652443751e290b2edb70173ec3c22f78fbe.tar.gz linux-d6e2d652443751e290b2edb70173ec3c22f78fbe.tar.bz2 linux-d6e2d652443751e290b2edb70173ec3c22f78fbe.zip | |
x86/hyperv: Add sev-snp enlightened guest static key
Introduce static key isolation_type_en_snp for enlightened
sev-snp guest check.
Reviewed-by: Dexuan Cui <decui@microsoft.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Signed-off-by: Tianyu Lan <tiala@microsoft.com>
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Link: https://lore.kernel.org/r/20230818102919.1318039-2-ltykernel@gmail.com
Diffstat (limited to 'arch/x86/kernel')
| -rw-r--r-- | arch/x86/kernel/cpu/mshyperv.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c index c7969e806c64..5398fb2f4d39 100644 --- a/arch/x86/kernel/cpu/mshyperv.c +++ b/arch/x86/kernel/cpu/mshyperv.c @@ -402,8 +402,12 @@ static void __init ms_hyperv_init_platform(void) pr_info("Hyper-V: Isolation Config: Group A 0x%x, Group B 0x%x\n", ms_hyperv.isolation_config_a, ms_hyperv.isolation_config_b); - if (hv_get_isolation_type() == HV_ISOLATION_TYPE_SNP) + + if (cc_platform_has(CC_ATTR_GUEST_SEV_SNP)) { + static_branch_enable(&isolation_type_en_snp); + } else if (hv_get_isolation_type() == HV_ISOLATION_TYPE_SNP) { static_branch_enable(&isolation_type_snp); + } } if (hv_max_functions_eax >= HYPERV_CPUID_NESTED_FEATURES) { @@ -473,7 +477,8 @@ static void __init ms_hyperv_init_platform(void) #if IS_ENABLED(CONFIG_HYPERV) if ((hv_get_isolation_type() == HV_ISOLATION_TYPE_VBS) || - (hv_get_isolation_type() == HV_ISOLATION_TYPE_SNP)) + ((hv_get_isolation_type() == HV_ISOLATION_TYPE_SNP) && + ms_hyperv.paravisor_present)) hv_vtom_init(); /* * Setup the hook to get control post apic initialization. |