[PATCH v7 6/8] crypto: ccp: Add new SEV/SNP platform shutdown API
From: Ashish Kalra <Ashish.Kalra@amd.com>
Date: 2025-03-24 21:15:31
Also in:
kvm, linux-crypto, lkml
Subsystem:
amd cryptographic coprocessor (ccp) driver, amd cryptographic coprocessor (ccp) driver - sev support, crypto api, the rest · Maintainers:
Tom Lendacky, John Allen, Ashish Kalra, Herbert Xu, "David S. Miller", Linus Torvalds
From: Ashish Kalra <ashish.kalra@amd.com> Add new API interface to do SEV/SNP platform shutdown when KVM module is unloaded. Reviewed-by: Dionna Glaze <redacted> Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: Ashish Kalra <ashish.kalra@amd.com> --- 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 6fdbb3bf44b5..671347702ae7 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 f3cad182d4ef..0b3a36bdaa90 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__ */
--
2.34.1