diff options
| -rw-r--r-- | arch/x86/coco/sev/core.c | 51 |
1 files changed, 11 insertions, 40 deletions
diff --git a/arch/x86/coco/sev/core.c b/arch/x86/coco/sev/core.c index ff19e805e7a1..af50a3846e53 100644 --- a/arch/x86/coco/sev/core.c +++ b/arch/x86/coco/sev/core.c @@ -92,6 +92,9 @@ static struct ghcb *boot_ghcb __section(".data"); /* Bitmap of SEV features supported by the hypervisor */ static u64 sev_hv_features __ro_after_init; +/* Secrets page physical address from the CC blob */ +static u64 secrets_pa __ro_after_init; + /* #VC handler runtime per-CPU data */ struct sev_es_runtime_data { struct ghcb ghcb_page; @@ -695,45 +698,13 @@ void noinstr __sev_es_nmi_complete(void) __sev_put_ghcb(&state); } -static u64 __init get_secrets_page(void) -{ - u64 pa_data = boot_params.cc_blob_address; - struct cc_blob_sev_info info; - void *map; - - /* - * The CC blob contains the address of the secrets page, check if the - * blob is present. - */ - if (!pa_data) - return 0; - - map = early_memremap(pa_data, sizeof(info)); - if (!map) { - pr_err("Unable to locate SNP secrets page: failed to map the Confidential Computing blob.\n"); - return 0; - } - memcpy(&info, map, sizeof(info)); - early_memunmap(map, sizeof(info)); - - /* smoke-test the secrets page passed */ - if (!info.secrets_phys || info.secrets_len != PAGE_SIZE) - return 0; - - return info.secrets_phys; -} - static u64 __init get_snp_jump_table_addr(void) { struct snp_secrets_page *secrets; void __iomem *mem; - u64 pa, addr; - - pa = get_secrets_page(); - if (!pa) - return 0; + u64 addr; - mem = ioremap_encrypted(pa, PAGE_SIZE); + mem = ioremap_encrypted(secrets_pa, PAGE_SIZE); if (!mem) { pr_err("Unable to locate AP jump table address: failed to map the SNP secrets page.\n"); return 0; @@ -2273,6 +2244,11 @@ bool __head snp_init(struct boot_params *bp) if (!cc_info) return false; + if (cc_info->secrets_phys && cc_info->secrets_len == PAGE_SIZE) + secrets_pa = cc_info->secrets_phys; + else + return false; + setup_cpuid_table(cc_info); svsm_setup(cc_info); @@ -2469,16 +2445,11 @@ static struct platform_device sev_guest_device = { static int __init snp_init_platform_device(void) { struct sev_guest_platform_data data; - u64 gpa; if (!cc_platform_has(CC_ATTR_GUEST_SEV_SNP)) return -ENODEV; - gpa = get_secrets_page(); - if (!gpa) - return -ENODEV; - - data.secrets_gpa = gpa; + data.secrets_gpa = secrets_pa; if (platform_device_add_data(&sev_guest_device, &data, sizeof(data))) return -ENODEV; |