From f7b86e0e75bc234751cb7a82d888083a57ef28b2 Mon Sep 17 00:00:00 2001 From: Ashish Kalra Date: Mon, 24 Mar 2025 21:15:17 +0000 Subject: [PATCH] crypto: ccp - Add new SEV/SNP platform shutdown API Add new API interface to do SEV/SNP platform shutdown when KVM module is unloaded. Reviewed-by: Dionna Glaze Reviewed-by: Tom Lendacky Signed-off-by: Ashish Kalra Signed-off-by: Herbert Xu --- drivers/crypto/ccp/sev-dev.c | 9 +++++++++ include/linux/psp-sev.h | 3 +++ 2 files changed, 12 insertions(+) diff --git a/drivers/crypto/ccp/sev-dev.c b/drivers/crypto/ccp/sev-dev.c index 6fdbb3bf44b5c..671347702ae7a 100644 --- a/drivers/crypto/ccp/sev-dev.c +++ b/drivers/crypto/ccp/sev-dev.c @@ -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; diff --git a/include/linux/psp-sev.h b/include/linux/psp-sev.h index f3cad182d4ef6..0b3a36bdaa906 100644 --- a/include/linux/psp-sev.h +++ b/include/linux/psp-sev.h @@ -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__ */ -- 2.50.1