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dmarc=pass (policy=quarantine) header.from=amd.com; spf=pass (imf03.hostedemail.com: domain of Ashish.Kalra@amd.com designates 40.107.237.46 as permitted sender) smtp.mailfrom=Ashish.Kalra@amd.com X-Rspam-User: X-Rspamd-Server: rspam05 X-Stat-Signature: 5df5cpf7idydwr38xa9mqyefugwa86fe X-HE-Tag: 1655766269-264851 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: From: Brijesh Singh AMD introduced the next generation of SEV called SEV-SNP (Secure Nested Paging). SEV-SNP builds upon existing SEV and SEV-ES functionality while adding new hardware security protection. Define the commands and structures used to communicate with the AMD-SP when creating and managing the SEV-SNP guests. The SEV-SNP firmware spec is available at developer.amd.com/sev. Signed-off-by: Brijesh Singh --- drivers/crypto/ccp/sev-dev.c | 14 +++ include/linux/psp-sev.h | 222 +++++++++++++++++++++++++++++++++++ include/uapi/linux/psp-sev.h | 42 +++++++ 3 files changed, 278 insertions(+) diff --git a/drivers/crypto/ccp/sev-dev.c b/drivers/crypto/ccp/sev-dev.c index fd928199bf1e..9cb3265f3bef 100644 --- a/drivers/crypto/ccp/sev-dev.c +++ b/drivers/crypto/ccp/sev-dev.c @@ -153,6 +153,20 @@ static int sev_cmd_buffer_len(int cmd) case SEV_CMD_GET_ID: return sizeof(struct sev_data_get_id); case SEV_CMD_ATTESTATION_REPORT: return sizeof(struct sev_data_attestation_report); case SEV_CMD_SEND_CANCEL: return sizeof(struct sev_data_send_cancel); + case SEV_CMD_SNP_GCTX_CREATE: return sizeof(struct sev_data_snp_gctx_create); + case SEV_CMD_SNP_LAUNCH_START: return sizeof(struct sev_data_snp_launch_start); + case SEV_CMD_SNP_LAUNCH_UPDATE: return sizeof(struct sev_data_snp_launch_update); + case SEV_CMD_SNP_ACTIVATE: return sizeof(struct sev_data_snp_activate); + case SEV_CMD_SNP_DECOMMISSION: return sizeof(struct sev_data_snp_decommission); + case SEV_CMD_SNP_PAGE_RECLAIM: return sizeof(struct sev_data_snp_page_reclaim); + case SEV_CMD_SNP_GUEST_STATUS: return sizeof(struct sev_data_snp_guest_status); + case SEV_CMD_SNP_LAUNCH_FINISH: return sizeof(struct sev_data_snp_launch_finish); + case SEV_CMD_SNP_DBG_DECRYPT: return sizeof(struct sev_data_snp_dbg); + case SEV_CMD_SNP_DBG_ENCRYPT: return sizeof(struct sev_data_snp_dbg); + case SEV_CMD_SNP_PAGE_UNSMASH: return sizeof(struct sev_data_snp_page_unsmash); + case SEV_CMD_SNP_PLATFORM_STATUS: return sizeof(struct sev_data_snp_platform_status_buf); + case SEV_CMD_SNP_GUEST_REQUEST: return sizeof(struct sev_data_snp_guest_request); + case SEV_CMD_SNP_CONFIG: return sizeof(struct sev_user_data_snp_config); default: return 0; } diff --git a/include/linux/psp-sev.h b/include/linux/psp-sev.h index 1595088c428b..01ba9dc46ca3 100644 --- a/include/linux/psp-sev.h +++ b/include/linux/psp-sev.h @@ -86,6 +86,34 @@ enum sev_cmd { SEV_CMD_DBG_DECRYPT = 0x060, SEV_CMD_DBG_ENCRYPT = 0x061, + /* SNP specific commands */ + SEV_CMD_SNP_INIT = 0x81, + SEV_CMD_SNP_SHUTDOWN = 0x82, + SEV_CMD_SNP_PLATFORM_STATUS = 0x83, + SEV_CMD_SNP_DF_FLUSH = 0x84, + SEV_CMD_SNP_INIT_EX = 0x85, + SEV_CMD_SNP_DECOMMISSION = 0x90, + SEV_CMD_SNP_ACTIVATE = 0x91, + SEV_CMD_SNP_GUEST_STATUS = 0x92, + SEV_CMD_SNP_GCTX_CREATE = 0x93, + SEV_CMD_SNP_GUEST_REQUEST = 0x94, + SEV_CMD_SNP_ACTIVATE_EX = 0x95, + SEV_CMD_SNP_LAUNCH_START = 0xA0, + SEV_CMD_SNP_LAUNCH_UPDATE = 0xA1, + SEV_CMD_SNP_LAUNCH_FINISH = 0xA2, + SEV_CMD_SNP_DBG_DECRYPT = 0xB0, + SEV_CMD_SNP_DBG_ENCRYPT = 0xB1, + SEV_CMD_SNP_PAGE_SWAP_OUT = 0xC0, + SEV_CMD_SNP_PAGE_SWAP_IN = 0xC1, + SEV_CMD_SNP_PAGE_MOVE = 0xC2, + SEV_CMD_SNP_PAGE_MD_INIT = 0xC3, + SEV_CMD_SNP_PAGE_MD_RECLAIM = 0xC4, + SEV_CMD_SNP_PAGE_RO_RECLAIM = 0xC5, + SEV_CMD_SNP_PAGE_RO_RESTORE = 0xC6, + SEV_CMD_SNP_PAGE_RECLAIM = 0xC7, + SEV_CMD_SNP_PAGE_UNSMASH = 0xC8, + SEV_CMD_SNP_CONFIG = 0xC9, + SEV_CMD_MAX, }; @@ -531,6 +559,200 @@ struct sev_data_attestation_report { u32 len; /* In/Out */ } __packed; +/** + * struct sev_data_snp_platform_status_buf - SNP_PLATFORM_STATUS command params + * + * @address: physical address where the status should be copied + */ +struct sev_data_snp_platform_status_buf { + u64 status_paddr; /* In */ +} __packed; + +/** + * struct sev_data_snp_download_firmware - SNP_DOWNLOAD_FIRMWARE command params + * + * @address: physical address of firmware image + * @len: len of the firmware image + */ +struct sev_data_snp_download_firmware { + u64 address; /* In */ + u32 len; /* In */ +} __packed; + +/** + * struct sev_data_snp_gctx_create - SNP_GCTX_CREATE command params + * + * @gctx_paddr: system physical address of the page donated to firmware by + * the hypervisor to contain the guest context. + */ +struct sev_data_snp_gctx_create { + u64 gctx_paddr; /* In */ +} __packed; + +/** + * struct sev_data_snp_activate - SNP_ACTIVATE command params + * + * @gctx_paddr: system physical address guest context page + * @asid: ASID to bind to the guest + */ +struct sev_data_snp_activate { + u64 gctx_paddr; /* In */ + u32 asid; /* In */ +} __packed; + +/** + * struct sev_data_snp_decommission - SNP_DECOMMISSION command params + * + * @address: system physical address guest context page + */ +struct sev_data_snp_decommission { + u64 gctx_paddr; /* In */ +} __packed; + +/** + * struct sev_data_snp_launch_start - SNP_LAUNCH_START command params + * + * @gctx_addr: system physical address of guest context page + * @policy: guest policy + * @ma_gctx_addr: system physical address of migration agent + * @imi_en: launch flow is launching an IMI for the purpose of + * guest-assisted migration. + * @ma_en: the guest is associated with a migration agent + */ +struct sev_data_snp_launch_start { + u64 gctx_paddr; /* In */ + u64 policy; /* In */ + u64 ma_gctx_paddr; /* In */ + u32 ma_en:1; /* In */ + u32 imi_en:1; /* In */ + u32 rsvd:30; + u8 gosvw[16]; /* In */ +} __packed; + +/* SNP support page type */ +enum { + SNP_PAGE_TYPE_NORMAL = 0x1, + SNP_PAGE_TYPE_VMSA = 0x2, + SNP_PAGE_TYPE_ZERO = 0x3, + SNP_PAGE_TYPE_UNMEASURED = 0x4, + SNP_PAGE_TYPE_SECRET = 0x5, + SNP_PAGE_TYPE_CPUID = 0x6, + + SNP_PAGE_TYPE_MAX +}; + +/** + * struct sev_data_snp_launch_update - SNP_LAUNCH_UPDATE command params + * + * @gctx_addr: system physical address of guest context page + * @imi_page: indicates that this page is part of the IMI of the guest + * @page_type: encoded page type + * @page_size: page size 0 indicates 4K and 1 indicates 2MB page + * @address: system physical address of destination page to encrypt + * @vmpl1_perms: VMPL permission mask for VMPL1 + * @vmpl2_perms: VMPL permission mask for VMPL2 + * @vmpl3_perms: VMPL permission mask for VMPL3 + */ +struct sev_data_snp_launch_update { + u64 gctx_paddr; /* In */ + u32 page_size:1; /* In */ + u32 page_type:3; /* In */ + u32 imi_page:1; /* In */ + u32 rsvd:27; + u32 rsvd2; + u64 address; /* In */ + u32 rsvd3:8; + u32 vmpl1_perms:8; /* In */ + u32 vmpl2_perms:8; /* In */ + u32 vmpl3_perms:8; /* In */ + u32 rsvd4; +} __packed; + +/** + * struct sev_data_snp_launch_finish - SNP_LAUNCH_FINISH command params + * + * @gctx_addr: system pphysical address of guest context page + */ +struct sev_data_snp_launch_finish { + u64 gctx_paddr; + u64 id_block_paddr; + u64 id_auth_paddr; + u8 id_block_en:1; + u8 auth_key_en:1; + u64 rsvd:62; + u8 host_data[32]; +} __packed; + +/** + * struct sev_data_snp_guest_status - SNP_GUEST_STATUS command params + * + * @gctx_paddr: system physical address of guest context page + * @address: system physical address of guest status page + */ +struct sev_data_snp_guest_status { + u64 gctx_paddr; + u64 address; +} __packed; + +/** + * struct sev_data_snp_page_reclaim - SNP_PAGE_RECLAIM command params + * + * @paddr: system physical address of page to be claimed. The BIT0 indicate + * the page size. 0h indicates 4 kB and 1h indicates 2 MB page. + */ +struct sev_data_snp_page_reclaim { + u64 paddr; +} __packed; + +/** + * struct sev_data_snp_page_unsmash - SNP_PAGE_UNMASH command params + * + * @paddr: system physical address of page to be unmashed. The BIT0 indicate + * the page size. 0h indicates 4 kB and 1h indicates 2 MB page. + */ +struct sev_data_snp_page_unsmash { + u64 paddr; +} __packed; + +/** + * struct sev_data_dbg - DBG_ENCRYPT/DBG_DECRYPT command parameters + * + * @handle: handle of the VM to perform debug operation + * @src_addr: source address of data to operate on + * @dst_addr: destination address of data to operate on + * @len: len of data to operate on + */ +struct sev_data_snp_dbg { + u64 gctx_paddr; /* In */ + u64 src_addr; /* In */ + u64 dst_addr; /* In */ + u32 len; /* In */ +} __packed; + +/** + * struct sev_snp_guest_request - SNP_GUEST_REQUEST command params + * + * @gctx_paddr: system physical address of guest context page + * @req_paddr: system physical address of request page + * @res_paddr: system physical address of response page + */ +struct sev_data_snp_guest_request { + u64 gctx_paddr; /* In */ + u64 req_paddr; /* In */ + u64 res_paddr; /* In */ +} __packed; + +/** + * struuct sev_data_snp_init - SNP_INIT_EX structure + * + * @init_rmp: indicate that the RMP should be initialized. + */ +struct sev_data_snp_init_ex { + u32 init_rmp:1; + u32 rsvd:31; + u8 rsvd1[60]; +} __packed; + #ifdef CONFIG_CRYPTO_DEV_SP_PSP /** diff --git a/include/uapi/linux/psp-sev.h b/include/uapi/linux/psp-sev.h index 91b4c63d5cbf..bed65a891223 100644 --- a/include/uapi/linux/psp-sev.h +++ b/include/uapi/linux/psp-sev.h @@ -61,6 +61,13 @@ typedef enum { SEV_RET_INVALID_PARAM, SEV_RET_RESOURCE_LIMIT, SEV_RET_SECURE_DATA_INVALID, + SEV_RET_INVALID_PAGE_SIZE, + SEV_RET_INVALID_PAGE_STATE, + SEV_RET_INVALID_MDATA_ENTRY, + SEV_RET_INVALID_PAGE_OWNER, + SEV_RET_INVALID_PAGE_AEAD_OFLOW, + SEV_RET_RMP_INIT_REQUIRED, + SEV_RET_MAX, } sev_ret_code; @@ -147,6 +154,41 @@ struct sev_user_data_get_id2 { __u32 length; /* In/Out */ } __packed; +/** + * struct sev_user_data_snp_status - SNP status + * + * @major: API major version + * @minor: API minor version + * @state: current platform state + * @build: firmware build id for the API version + * @guest_count: the number of guest currently managed by the firmware + * @tcb_version: current TCB version + */ +struct sev_user_data_snp_status { + __u8 api_major; /* Out */ + __u8 api_minor; /* Out */ + __u8 state; /* Out */ + __u8 rsvd; + __u32 build_id; /* Out */ + __u32 rsvd1; + __u32 guest_count; /* Out */ + __u64 tcb_version; /* Out */ + __u64 rsvd2; +} __packed; + +/* + * struct sev_user_data_snp_config - system wide configuration value for SNP. + * + * @reported_tcb: The TCB version to report in the guest attestation report. + * @mask_chip_id: Indicates that the CHID_ID field in the attestation report + * will always be zero. + */ +struct sev_user_data_snp_config { + __u64 reported_tcb; /* In */ + __u32 mask_chip_id; /* In */ + __u8 rsvd[52]; +} __packed; + /** * struct sev_issue_cmd - SEV ioctl parameters *