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| author |  Dexuan Cui <decui@microsoft.com>
| 2023-08-24 01:07:03 -0700 |
|---|---|---|
| committer |  Wei Liu <wei.liu@kernel.org>
| 2023-08-25 00:04:56 +0000 |
| commit | 08e9d12077fcc7c4c4579d7dcd8093b59b01369e (patch) | |
| tree | 95784ca8040bc7c12a548bd874c51234ac32e11f /arch/x86/hyperv/ivm.c | |
| parent | x86/hyperv: Fix undefined reference to isolation_type_en_snp without CONFIG_H... (diff) | |
| download | linux-08e9d12077fcc7c4c4579d7dcd8093b59b01369e.tar.gz linux-08e9d12077fcc7c4c4579d7dcd8093b59b01369e.tar.bz2 linux-08e9d12077fcc7c4c4579d7dcd8093b59b01369e.zip | |
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/hyperv/ivm.c')
| -rw-r--r-- | arch/x86/hyperv/ivm.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/x86/hyperv/ivm.c b/arch/x86/hyperv/ivm.c index cbbd3af4c3da..afdae1a8a117 100644 --- a/arch/x86/hyperv/ivm.c +++ b/arch/x86/hyperv/ivm.c @@ -562,3 +562,12 @@ bool hv_isolation_type_en_snp(void) return static_branch_unlikely(&isolation_type_en_snp); } +DEFINE_STATIC_KEY_FALSE(isolation_type_tdx); +/* + * hv_isolation_type_tdx - Check if the system runs in an Intel TDX based + * isolated VM. + */ +bool hv_isolation_type_tdx(void) +{ + return static_branch_unlikely(&isolation_type_tdx); +} |