diff options
| author | Ard Biesheuvel <ardb@kernel.org> | 2025-08-28 12:22:07 +0200 |
|---|---|---|
| committer | Borislav Petkov (AMD) <bp@alien8.de> | 2025-08-31 12:40:56 +0200 |
| commit | e349241b97a8b1169a4e90375159df4d22061f9a (patch) | |
| tree | 0880ed0ddbf3357d077c757b74c5d130e7baeb4d /arch/x86/boot/compressed | |
| parent | 7cb7b6de9cb90311a917d65c0228b6aa223dc456 (diff) | |
x86/sev: Run RMPADJUST on SVSM calling area page to test VMPL
Determining the VMPL at which the kernel runs involves performing a RMPADJUST
operation on an arbitrary page of memory, and observing whether it succeeds.
The use of boot_ghcb_page in the core kernel in this case is completely
arbitrary, but results in the need to provide a PIC alias for it. So use
boot_svsm_ca_page instead, which already needs this alias for other reasons.
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com>
Link: https://lore.kernel.org/20250828102202.1849035-28-ardb+git@google.com
Diffstat (limited to 'arch/x86/boot/compressed')
| -rw-r--r-- | arch/x86/boot/compressed/sev.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/boot/compressed/sev.c b/arch/x86/boot/compressed/sev.c index b71c1ab6a282..3628e9bddc6a 100644 --- a/arch/x86/boot/compressed/sev.c +++ b/arch/x86/boot/compressed/sev.c @@ -327,7 +327,7 @@ static bool early_snp_init(struct boot_params *bp) * running at VMPL0. The CA will be used to communicate with the * SVSM and request its services. */ - svsm_setup_ca(cc_info); + svsm_setup_ca(cc_info, rip_rel_ptr(&boot_ghcb_page)); /* * Pass run-time kernel a pointer to CC info via boot_params so EFI |