diff options
| author | Andrea Parri (Microsoft) <parri.andrea@gmail.com> | 2021-02-01 15:48:11 +0100 |
|---|---|---|
| committer | Wei Liu <wei.liu@kernel.org> | 2021-02-11 08:47:05 +0000 |
| commit | a6c76bb08dc7f7ff2b1c381002eb6c7211746182 (patch) | |
| tree | 9c86151283b8998c2cd26ccf1981d50c823cb555 /arch/x86/include/asm/hyperv-tlfs.h | |
| parent | bdb49526d25b076af4bd31b2fc66986ff0df1127 (diff) | |
| download | linux-a6c76bb08dc7f7ff2b1c381002eb6c7211746182.tar.gz linux-a6c76bb08dc7f7ff2b1c381002eb6c7211746182.tar.bz2 linux-a6c76bb08dc7f7ff2b1c381002eb6c7211746182.zip | |
x86/hyperv: Load/save the Isolation Configuration leaf
If bit 22 of Group B Features is set, the guest has access to the
Isolation Configuration CPUID leaf. On x86, the first four bits
of EAX in this leaf provide the isolation type of the partition;
we entail three isolation types: 'SNP' (hardware-based isolation),
'VBS' (software-based isolation), and 'NONE' (no isolation).
Signed-off-by: Andrea Parri (Microsoft) <parri.andrea@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: x86@kernel.org
Cc: linux-arch@vger.kernel.org
Link: https://lore.kernel.org/r/20210201144814.2701-2-parri.andrea@gmail.com
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Diffstat (limited to 'arch/x86/include/asm/hyperv-tlfs.h')
| -rw-r--r-- | arch/x86/include/asm/hyperv-tlfs.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/x86/include/asm/hyperv-tlfs.h b/arch/x86/include/asm/hyperv-tlfs.h index 6bf42aed387e..6aed936e5e96 100644 --- a/arch/x86/include/asm/hyperv-tlfs.h +++ b/arch/x86/include/asm/hyperv-tlfs.h @@ -22,6 +22,7 @@ #define HYPERV_CPUID_ENLIGHTMENT_INFO 0x40000004 #define HYPERV_CPUID_IMPLEMENT_LIMITS 0x40000005 #define HYPERV_CPUID_NESTED_FEATURES 0x4000000A +#define HYPERV_CPUID_ISOLATION_CONFIG 0x4000000C #define HYPERV_CPUID_VIRT_STACK_INTERFACE 0x40000081 #define HYPERV_VS_INTERFACE_EAX_SIGNATURE 0x31235356 /* "VS#1" */ @@ -122,6 +123,20 @@ #define HV_X64_NESTED_GUEST_MAPPING_FLUSH BIT(18) #define HV_X64_NESTED_MSR_BITMAP BIT(19) +/* HYPERV_CPUID_ISOLATION_CONFIG.EAX bits. */ +#define HV_PARAVISOR_PRESENT BIT(0) + +/* HYPERV_CPUID_ISOLATION_CONFIG.EBX bits. */ +#define HV_ISOLATION_TYPE GENMASK(3, 0) +#define HV_SHARED_GPA_BOUNDARY_ACTIVE BIT(5) +#define HV_SHARED_GPA_BOUNDARY_BITS GENMASK(11, 6) + +enum hv_isolation_type { + HV_ISOLATION_TYPE_NONE = 0, + HV_ISOLATION_TYPE_VBS = 1, + HV_ISOLATION_TYPE_SNP = 2 +}; + /* Hyper-V specific model specific registers (MSRs) */ /* MSR used to identify the guest OS. */ |