diff options
| author | Dexuan Cui <decui@microsoft.com> | 2023-08-24 11:07:03 +0300 |
|---|---|---|
| committer | Wei Liu <wei.liu@kernel.org> | 2023-08-25 03:04:56 +0300 |
| commit | 08e9d12077fcc7c4c4579d7dcd8093b59b01369e (patch) | |
| tree | 95784ca8040bc7c12a548bd874c51234ac32e11f /arch/x86/include/asm/mshyperv.h | |
| parent | 86e619c922e616d8780833562a14a5bda329f0c3 (diff) | |
| download | linux-08e9d12077fcc7c4c4579d7dcd8093b59b01369e.tar.xz | |
x86/hyperv: Add hv_isolation_type_tdx() to detect TDX guests
No logic change to SNP/VBS guests.
hv_isolation_type_tdx() will be used to instruct a TDX guest on Hyper-V to
do some TDX-specific operations, e.g. for a fully enlightened TDX guest
(i.e. without the paravisor), hv_do_hypercall() should use
__tdx_hypercall() and such a guest on Hyper-V should handle the Hyper-V
Event/Message/Monitor pages specially.
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Reviewed-by: Tianyu Lan <tiala@microsoft.com>
Signed-off-by: Dexuan Cui <decui@microsoft.com>
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Link: https://lore.kernel.org/r/20230824080712.30327-2-decui@microsoft.com
Diffstat (limited to 'arch/x86/include/asm/mshyperv.h')
| -rw-r--r-- | arch/x86/include/asm/mshyperv.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/include/asm/mshyperv.h b/arch/x86/include/asm/mshyperv.h index b6be267ff3d0..3feb4e36851e 100644 --- a/arch/x86/include/asm/mshyperv.h +++ b/arch/x86/include/asm/mshyperv.h @@ -27,6 +27,7 @@ union hv_ghcb; DECLARE_STATIC_KEY_FALSE(isolation_type_snp); DECLARE_STATIC_KEY_FALSE(isolation_type_en_snp); +DECLARE_STATIC_KEY_FALSE(isolation_type_tdx); typedef int (*hyperv_fill_flush_list_func)( struct hv_guest_mapping_flush_list *flush, @@ -49,6 +50,8 @@ extern u64 hv_current_partition_id; extern union hv_ghcb * __percpu *hv_ghcb_pg; extern bool hv_isolation_type_en_snp(void); +bool hv_isolation_type_tdx(void); + /* * DEFAULT INIT GPAT and SEGMENT LIMIT value in struct VMSA * to start AP in enlightened SEV guest. |