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| author | Tom Lendacky <thomas.lendacky@amd.com> | 2024-06-05 17:18:51 +0200 |
|---|---|---|
| committer | Borislav Petkov (AMD) <bp@alien8.de> | 2024-06-17 20:42:57 +0200 |
| commit | eb65f96cb332d577b490ab9c9f5f8de8c0316076 (patch) | |
| tree | f932d135f9ed2a9d52de8f38610bb6a570c4e839 /arch/x86/kernel | |
| parent | x86/sev: Provide guest VMPL level to userspace (diff) | |
| download | linux-eb65f96cb332d577b490ab9c9f5f8de8c0316076.tar.xz linux-eb65f96cb332d577b490ab9c9f5f8de8c0316076.zip | |
virt: sev-guest: Choose the VMPCK key based on executing VMPL
Currently, the sev-guest driver uses the vmpck-0 key by default. When an
SVSM is present, the kernel is running at a VMPL other than 0 and the
vmpck-0 key is no longer available. If a specific vmpck key has not be
requested by the user via the vmpck_id module parameter, choose the
vmpck key based on the active VMPL level.
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/r/b88081c5d88263176849df8ea93e90a404619cab.1717600736.git.thomas.lendacky@amd.com
Diffstat (limited to 'arch/x86/kernel')
| -rw-r--r-- | arch/x86/kernel/sev-shared.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/x86/kernel/sev-shared.c b/arch/x86/kernel/sev-shared.c index 2f509109c4f2..71de53194089 100644 --- a/arch/x86/kernel/sev-shared.c +++ b/arch/x86/kernel/sev-shared.c @@ -36,7 +36,8 @@ * early boot, both with identity mapped virtual addresses and proper kernel * virtual addresses. */ -static u8 snp_vmpl __ro_after_init; +u8 snp_vmpl __ro_after_init; +EXPORT_SYMBOL_GPL(snp_vmpl); static struct svsm_ca *boot_svsm_caa __ro_after_init; static u64 boot_svsm_caa_pa __ro_after_init; |