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crypto: ccp - Add new SEV/SNP platform shutdown API

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Add new API interface to do SEV/SNP platform shutdown when KVM module
is unloaded.

Reviewed-by: Dionna Glaze <dionnaglaze@google.com>
Reviewed-by: Tom Lendacky <thomas.lendacky@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 21:15:17 +00:00 committed by Herbert Xu
parent 19860c3274
commit f7b86e0e75
2 changed files with 12 additions and 0 deletions
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9
drivers/crypto/ccp/sev-dev.c
View File

@ -2468,6 +2468,15 @@ static void sev_firmware_shutdown(struct sev_device *sev)
mutex_unlock(&sev_cmd_mutex);
}
void sev_platform_shutdown(void)
{
if (!psp_master || !psp_master->sev_data)
return;
sev_firmware_shutdown(psp_master->sev_data);
}
EXPORT_SYMBOL_GPL(sev_platform_shutdown);
void sev_dev_destroy(struct psp_device *psp)
{
struct sev_device *sev = psp->sev_data;

3
include/linux/psp-sev.h
View File

@ -954,6 +954,7 @@ int sev_do_cmd(int cmd, void *data, int *psp_ret);
void *psp_copy_user_blob(u64 uaddr, u32 len);
void *snp_alloc_firmware_page(gfp_t mask);
void snp_free_firmware_page(void *addr);
void sev_platform_shutdown(void);
#else /* !CONFIG_CRYPTO_DEV_SP_PSP */
@ -988,6 +989,8 @@ static inline void *snp_alloc_firmware_page(gfp_t mask)
static inline void snp_free_firmware_page(void *addr) { }
static inline void sev_platform_shutdown(void) { }
#endif /* CONFIG_CRYPTO_DEV_SP_PSP */
#endif /* __PSP_SEV_H__ */