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| author | Kirill A. Shutemov <kirill.shutemov@linux.intel.com> | 2022-02-22 19:57:39 +0100 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2022-02-23 19:14:16 +0100 |
| commit | 655a0fa34b4f7ac6e2b1406fab15e52a7b6accb1 (patch) | |
| tree | 689cb0c5e8729235a74ee74c7bb18bd36b4cd652 /arch/x86/kernel | |
| parent | x86/cc: Move arch/x86/{kernel/cc_platform.c => coco/core.c} (diff) | |
| download | linux-655a0fa34b4f7ac6e2b1406fab15e52a7b6accb1.tar.xz linux-655a0fa34b4f7ac6e2b1406fab15e52a7b6accb1.zip | |
x86/coco: Explicitly declare type of confidential computing platform
The kernel derives the confidential computing platform
type it is running as from sme_me_mask on AMD or by using
hv_is_isolation_supported() on HyperV isolation VMs. This detection
process will be more complicated as more platforms get added.
Declare a confidential computing vendor variable explicitly and set it
via cc_set_vendor() on the respective platform.
[ bp: Massage commit message, fixup HyperV check. ]
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com>
Link: https://lore.kernel.org/r/20220222185740.26228-4-kirill.shutemov@linux.intel.com
Diffstat (limited to 'arch/x86/kernel')
| -rw-r--r-- | arch/x86/kernel/cpu/mshyperv.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c index 5a99f993e639..e0a572472052 100644 --- a/arch/x86/kernel/cpu/mshyperv.c +++ b/arch/x86/kernel/cpu/mshyperv.c @@ -33,6 +33,7 @@ #include <asm/nmi.h> #include <clocksource/hyperv_timer.h> #include <asm/numa.h> +#include <asm/coco.h> /* Is Linux running as the root partition? */ bool hv_root_partition; @@ -344,6 +345,11 @@ static void __init ms_hyperv_init_platform(void) */ swiotlb_force = SWIOTLB_FORCE; #endif + /* Isolation VMs are unenlightened SEV-based VMs, thus this check: */ + if (IS_ENABLED(CONFIG_AMD_MEM_ENCRYPT)) { + if (hv_get_isolation_type() != HV_ISOLATION_TYPE_NONE) + cc_set_vendor(CC_VENDOR_HYPERV); + } } if (hv_max_functions_eax >= HYPERV_CPUID_NESTED_FEATURES) { |