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crypto: ccp - allow callers to use HV-Fixed page API when SEV is disabled

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When SEV is disabled, the HV-Fixed page allocation call fails, which in
turn causes SFS initialization to fail.

Fix the HV-Fixed API so callers (for example, SFS) can use it even when
SEV is disabled by performing normal page allocation and freeing.

Fixes: e09701dcdd ("crypto: ccp - Add new HV-Fixed page allocation/free API")
Cc: stable@vger.kernel.org
Signed-off-by: Ashish Kalra <ashish.kalra@amd.com>
Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Ashish Kalra
2026-02-06 21:26:45 +00:00
committed by Herbert Xu
parent 6de23f81a5
commit 8168a7b72b
1 changed files with 4 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
drivers/crypto/ccp/sev-dev.c
View File

@@ -1105,15 +1105,12 @@ struct page *snp_alloc_hv_fixed_pages(unsigned int num_2mb_pages)
{
struct psp_device *psp_master = psp_get_master_device();
struct snp_hv_fixed_pages_entry *entry;
struct sev_device *sev;
unsigned int order;
struct page *page;
if (!psp_master || !psp_master->sev_data)
if (!psp_master)
return NULL;
sev = psp_master->sev_data;
order = get_order(PMD_SIZE * num_2mb_pages);
/*
@@ -1126,7 +1123,8 @@ struct page *snp_alloc_hv_fixed_pages(unsigned int num_2mb_pages)
* This API uses SNP_INIT_EX to transition allocated pages to HV_Fixed
* page state, fail if SNP is already initialized.
*/
if (sev->snp_initialized)
if (psp_master->sev_data &&
((struct sev_device *)psp_master->sev_data)->snp_initialized)
return NULL;
/* Re-use freed pages that match the request */
@@ -1162,7 +1160,7 @@ void snp_free_hv_fixed_pages(struct page *page)
struct psp_device *psp_master = psp_get_master_device();
struct snp_hv_fixed_pages_entry *entry, *nentry;
if (!psp_master || !psp_master->sev_data)
if (!psp_master)
return;
/*