bybrooklyn/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-04-18 14:53:58 -04:00
Code Issues Packages Projects Releases Wiki Activity

crypto: ccp - Move SEV/SNP Platform initialization to KVM

Browse Source 
SNP initialization is forced during PSP driver probe purely because SNP
can't be initialized if VMs are running.  But the only in-tree user of
SEV/SNP functionality is KVM, and KVM depends on PSP driver for the same.
Forcing SEV/SNP initialization because a hypervisor could be running
legacy non-confidential VMs make no sense.

This patch removes SEV/SNP initialization from the PSP driver probe
time and moves the requirement to initialize SEV/SNP functionality
to KVM if it wants to use SEV/SNP.

Suggested-by: Sean Christopherson <seanjc@google.com>
Reviewed-by: Alexey Kardashevskiy <aik@amd.com>
Signed-off-by: Ashish Kalra <ashish.kalra@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Ashish Kalra
2025-03-24 21:15:47 +00:00
committed by Herbert Xu
parent 6f1d5a3513
commit 3f8f0133a5
1 changed files with 0 additions and 13 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
drivers/crypto/ccp/sev-dev.c
View File

@@ -1347,10 +1347,6 @@ static int _sev_platform_init_locked(struct sev_platform_init_args *args)
if (sev->state == SEV_STATE_INIT)
return 0;
/*
* Legacy guests cannot be running while SNP_INIT(_EX) is executing,
* so perform SEV-SNP initialization at probe time.
*/
rc = __sev_snp_init_locked(&args->error);
if (rc && rc != -ENODEV)
return rc;
@@ -2524,9 +2520,7 @@ EXPORT_SYMBOL_GPL(sev_issue_cmd_external_user);
void sev_pci_init(void)
{
struct sev_device *sev = psp_master->sev_data;
struct sev_platform_init_args args = {0};
u8 api_major, api_minor, build;
int rc;
if (!sev)
return;
@@ -2549,13 +2543,6 @@ void sev_pci_init(void)
api_major, api_minor, build,
sev->api_major, sev->api_minor, sev->build);
/* Initialize the platform */
args.probe = true;
rc = sev_platform_init(&args);
if (rc)
dev_err(sev->dev, "SEV: failed to INIT error %#x, rc %d\n",
args.error, rc);
return;
err: