diff options
| author | Dexuan Cui <decui@microsoft.com> | 2023-08-24 11:07:04 +0300 |
|---|---|---|
| committer | Wei Liu <wei.liu@kernel.org> | 2023-08-25 03:04:56 +0300 |
| commit | d6e0228d265f29348a01780ff306321c399d8b95 (patch) | |
| tree | 5c05fed6d87e9444003f911e73389ce926def88c /arch/x86/hyperv/ivm.c | |
| parent | 08e9d12077fcc7c4c4579d7dcd8093b59b01369e (diff) | |
| download | linux-d6e0228d265f29348a01780ff306321c399d8b95.tar.xz | |
x86/hyperv: Support hypercalls for fully enlightened TDX guests
A fully enlightened TDX guest on Hyper-V (i.e. without the paravisor) only
uses the GHCI call rather than hv_hypercall_pg. Do not initialize
hypercall_pg for such a guest.
In hv_common_cpu_init(), the hyperv_pcpu_input_arg page needs to be
decrypted in such a guest.
Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
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/20230824080712.30327-3-decui@microsoft.com
Diffstat (limited to 'arch/x86/hyperv/ivm.c')
| -rw-r--r-- | arch/x86/hyperv/ivm.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/x86/hyperv/ivm.c b/arch/x86/hyperv/ivm.c index afdae1a8a117..6c7598d9e68a 100644 --- a/arch/x86/hyperv/ivm.c +++ b/arch/x86/hyperv/ivm.c @@ -571,3 +571,20 @@ bool hv_isolation_type_tdx(void) { return static_branch_unlikely(&isolation_type_tdx); } + +#ifdef CONFIG_INTEL_TDX_GUEST + +u64 hv_tdx_hypercall(u64 control, u64 param1, u64 param2) +{ + struct tdx_hypercall_args args = { }; + + args.r10 = control; + args.rdx = param1; + args.r8 = param2; + + (void)__tdx_hypercall_ret(&args); + + return args.r11; +} + +#endif |