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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-04 10:15:33 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-04 10:15:33 +0000 |
| commit | a097cf30108c0151cb2684afd962bd2678ff97d7 (patch) | |
| tree | de1ac8afc7248eec4b2fb60496b8e9273452d9f7 /arch/x86/mm/mem_encrypt_amd.c | |
| parent | Adding upstream version 6.1.82. (diff) | |
| download | linux-a097cf30108c0151cb2684afd962bd2678ff97d7.tar.xz linux-a097cf30108c0151cb2684afd962bd2678ff97d7.zip | |
Adding upstream version 6.1.85.upstream/6.1.85
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/x86/mm/mem_encrypt_amd.c')
| -rw-r--r-- | arch/x86/mm/mem_encrypt_amd.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/arch/x86/mm/mem_encrypt_amd.c b/arch/x86/mm/mem_encrypt_amd.c index 3e93af083..d4957eefe 100644 --- a/arch/x86/mm/mem_encrypt_amd.c +++ b/arch/x86/mm/mem_encrypt_amd.c @@ -513,6 +513,24 @@ void __init sme_early_init(void) */ if (sev_status & MSR_AMD64_SEV_ENABLED) ia32_disable(); + + /* + * Override init functions that scan the ROM region in SEV-SNP guests, + * as this memory is not pre-validated and would thus cause a crash. + */ + if (sev_status & MSR_AMD64_SEV_SNP_ENABLED) { + x86_init.mpparse.find_smp_config = x86_init_noop; + x86_init.pci.init_irq = x86_init_noop; + x86_init.resources.probe_roms = x86_init_noop; + + /* + * DMI setup behavior for SEV-SNP guests depends on + * efi_enabled(EFI_CONFIG_TABLES), which hasn't been + * parsed yet. snp_dmi_setup() will run after that + * parsing has happened. + */ + x86_init.resources.dmi_setup = snp_dmi_setup; + } } void __init mem_encrypt_free_decrypted_mem(void) |