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| author | Saurabh Sengar <ssengar@linux.microsoft.com> | 2023-04-11 08:55:32 +0300 |
|---|---|---|
| committer | Wei Liu <wei.liu@kernel.org> | 2023-04-18 20:29:52 +0300 |
| commit | 3be1bc2fe9d2e4fc1375efa2567d2f58cd2a2a7c (patch) | |
| tree | a23d6ae4e942929e5fab08902fea6244eaffe4c1 /arch/x86/include/asm/mshyperv.h | |
| parent | d01b9a9f2d0131e1e249177a70e6b80d146d16d2 (diff) | |
| download | linux-3be1bc2fe9d2e4fc1375efa2567d2f58cd2a2a7c.tar.xz | |
x86/hyperv: VTL support for Hyper-V
Virtual Trust Levels (VTL) helps enable Hyper-V Virtual Secure Mode (VSM)
feature. VSM is a set of hypervisor capabilities and enlightenments
offered to host and guest partitions which enable the creation and
management of new security boundaries within operating system software.
VSM achieves and maintains isolation through VTLs.
Add early initialization for Virtual Trust Levels (VTL). This includes
initializing the x86 platform for VTL and enabling boot support for
secondary CPUs to start in targeted VTL context. For now, only enable
the code for targeted VTL level as 2.
When starting an AP at a VTL other than VTL0, the AP must start directly
in 64-bit mode, bypassing the usual 16-bit -> 32-bit -> 64-bit mode
transition sequence that occurs after waking up an AP with SIPI whose
vector points to the 16-bit AP startup trampoline code.
Signed-off-by: Saurabh Sengar <ssengar@linux.microsoft.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Reviewed-by: Stanislav Kinsburskii <stanislav.kinsburskii@gmail.com>
Link: https://lore.kernel.org/r/1681192532-15460-6-git-send-email-ssengar@linux.microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Diffstat (limited to 'arch/x86/include/asm/mshyperv.h')
| -rw-r--r-- | arch/x86/include/asm/mshyperv.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/x86/include/asm/mshyperv.h b/arch/x86/include/asm/mshyperv.h index 67f8386c1775..b445e252aa83 100644 --- a/arch/x86/include/asm/mshyperv.h +++ b/arch/x86/include/asm/mshyperv.h @@ -19,6 +19,10 @@ */ #define HV_IOAPIC_BASE_ADDRESS 0xfec00000 +#define HV_VTL_NORMAL 0x0 +#define HV_VTL_SECURE 0x1 +#define HV_VTL_MGMT 0x2 + union hv_ghcb; DECLARE_STATIC_KEY_FALSE(isolation_type_snp); @@ -276,6 +280,12 @@ static inline u64 hv_get_non_nested_register(unsigned int reg) { return 0; } #endif /* CONFIG_HYPERV */ +#ifdef CONFIG_HYPERV_VTL_MODE +void __init hv_vtl_init_platform(void); +#else +static inline void __init hv_vtl_init_platform(void) {} +#endif + #include <asm-generic/mshyperv.h> #endif |