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usr
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src
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linux-headers-6.8.0-83-generic
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arch
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x86
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include
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asm
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sev-common.h
/* SPDX-License-Identifier: GPL-2.0 */ /* * AMD SEV header common between the guest and the hypervisor. * * Author: Brijesh Singh <brijesh.singh@amd.com> */ #ifndef __ASM_X86_SEV_COMMON_H #define __ASM_X86_SEV_COMMON_H #define GHCB_MSR_INFO_POS 0 #define GHCB_DATA_LOW 12 #define GHCB_MSR_INFO_MASK (BIT_ULL(GHCB_DATA_LOW) - 1) #define GHCB_DATA(v) \ (((unsigned long)(v) & ~GHCB_MSR_INFO_MASK) >> GHCB_DATA_LOW) /* SEV Information Request/Response */ #define GHCB_MSR_SEV_INFO_RESP 0x001 #define GHCB_MSR_SEV_INFO_REQ 0x002 #define GHCB_MSR_SEV_INFO(_max, _min, _cbit) \ /* GHCBData[63:48] */ \ ((((_max) & 0xffff) << 48) | \ /* GHCBData[47:32] */ \ (((_min) & 0xffff) << 32) | \ /* GHCBData[31:24] */ \ (((_cbit) & 0xff) << 24) | \ GHCB_MSR_SEV_INFO_RESP) #define GHCB_MSR_INFO(v) ((v) & 0xfffUL) #define GHCB_MSR_PROTO_MAX(v) (((v) >> 48) & 0xffff) #define GHCB_MSR_PROTO_MIN(v) (((v) >> 32) & 0xffff) /* CPUID Request/Response */ #define GHCB_MSR_CPUID_REQ 0x004 #define GHCB_MSR_CPUID_RESP 0x005 #define GHCB_MSR_CPUID_FUNC_POS 32 #define GHCB_MSR_CPUID_FUNC_MASK 0xffffffff #define GHCB_MSR_CPUID_VALUE_POS 32 #define GHCB_MSR_CPUID_VALUE_MASK 0xffffffff #define GHCB_MSR_CPUID_REG_POS 30 #define GHCB_MSR_CPUID_REG_MASK 0x3 #define GHCB_CPUID_REQ_EAX 0 #define GHCB_CPUID_REQ_EBX 1 #define GHCB_CPUID_REQ_ECX 2 #define GHCB_CPUID_REQ_EDX 3 #define GHCB_CPUID_REQ(fn, reg) \ /* GHCBData[11:0] */ \ (GHCB_MSR_CPUID_REQ | \ /* GHCBData[31:12] */ \ (((unsigned long)(reg) & 0x3) << 30) | \ /* GHCBData[63:32] */ \ (((unsigned long)fn) << 32)) /* AP Reset Hold */ #define GHCB_MSR_AP_RESET_HOLD_REQ 0x006 #define GHCB_MSR_AP_RESET_HOLD_RESP 0x007 /* GHCB GPA Register */ #define GHCB_MSR_REG_GPA_REQ 0x012 #define GHCB_MSR_REG_GPA_REQ_VAL(v) \ /* GHCBData[63:12] */ \ (((u64)((v) & GENMASK_ULL(51, 0)) << 12) | \ /* GHCBData[11:0] */ \ GHCB_MSR_REG_GPA_REQ) #define GHCB_MSR_REG_GPA_RESP 0x013 #define GHCB_MSR_REG_GPA_RESP_VAL(v) \ /* GHCBData[63:12] */ \ (((u64)(v) & GENMASK_ULL(63, 12)) >> 12) /* * SNP Page State Change Operation * * GHCBData[55:52] - Page operation: * 0x0001 Page assignment, Private * 0x0002 Page assignment, Shared */ enum psc_op { SNP_PAGE_STATE_PRIVATE = 1, SNP_PAGE_STATE_SHARED, }; #define GHCB_MSR_PSC_REQ 0x014 #define GHCB_MSR_PSC_REQ_GFN(gfn, op) \ /* GHCBData[55:52] */ \ (((u64)((op) & 0xf) << 52) | \ /* GHCBData[51:12] */ \ ((u64)((gfn) & GENMASK_ULL(39, 0)) << 12) | \ /* GHCBData[11:0] */ \ GHCB_MSR_PSC_REQ) #define GHCB_MSR_PSC_RESP 0x015 #define GHCB_MSR_PSC_RESP_VAL(val) \ /* GHCBData[63:32] */ \ (((u64)(val) & GENMASK_ULL(63, 32)) >> 32) /* GHCB Hypervisor Feature Request/Response */ #define GHCB_MSR_HV_FT_REQ 0x080 #define GHCB_MSR_HV_FT_RESP 0x081 #define GHCB_MSR_HV_FT_RESP_VAL(v) \ /* GHCBData[63:12] */ \ (((u64)(v) & GENMASK_ULL(63, 12)) >> 12) #define GHCB_HV_FT_SNP BIT_ULL(0) #define GHCB_HV_FT_SNP_AP_CREATION BIT_ULL(1) /* * SNP Page State Change NAE event * The VMGEXIT_PSC_MAX_ENTRY determines the size of the PSC structure, which * is a local stack variable in set_pages_state(). Do not increase this value * without evaluating the impact to stack usage. */ #define VMGEXIT_PSC_MAX_ENTRY 64 struct psc_hdr { u16 cur_entry; u16 end_entry; u32 reserved; } __packed; struct psc_entry { u64 cur_page : 12, gfn : 40, operation : 4, pagesize : 1, reserved : 7; } __packed; struct snp_psc_desc { struct psc_hdr hdr; struct psc_entry entries[VMGEXIT_PSC_MAX_ENTRY]; } __packed; #define GHCB_MSR_TERM_REQ 0x100 #define GHCB_MSR_TERM_REASON_SET_POS 12 #define GHCB_MSR_TERM_REASON_SET_MASK 0xf #define GHCB_MSR_TERM_REASON_POS 16 #define GHCB_MSR_TERM_REASON_MASK 0xff #define GHCB_SEV_TERM_REASON(reason_set, reason_val) \ /* GHCBData[15:12] */ \ (((((u64)reason_set) & 0xf) << 12) | \ /* GHCBData[23:16] */ \ ((((u64)reason_val) & 0xff) << 16)) /* Error codes from reason set 0 */ #define SEV_TERM_SET_GEN 0 #define GHCB_SEV_ES_GEN_REQ 0 #define GHCB_SEV_ES_PROT_UNSUPPORTED 1 #define GHCB_SNP_UNSUPPORTED 2 /* Linux-specific reason codes (used with reason set 1) */ #define SEV_TERM_SET_LINUX 1 #define GHCB_TERM_REGISTER 0 /* GHCB GPA registration failure */ #define GHCB_TERM_PSC 1 /* Page State Change failure */ #define GHCB_TERM_PVALIDATE 2 /* Pvalidate failure */ #define GHCB_TERM_NOT_VMPL0 3 /* SNP guest is not running at VMPL-0 */ #define GHCB_TERM_CPUID 4 /* CPUID-validation failure */ #define GHCB_TERM_CPUID_HV 5 /* CPUID failure during hypervisor fallback */ #define GHCB_RESP_CODE(v) ((v) & GHCB_MSR_INFO_MASK) /* * Error codes related to GHCB input that can be communicated back to the guest * by setting the lower 32-bits of the GHCB SW_EXITINFO1 field to 2. */ #define GHCB_ERR_NOT_REGISTERED 1 #define GHCB_ERR_INVALID_USAGE 2 #define GHCB_ERR_INVALID_SCRATCH_AREA 3 #define GHCB_ERR_MISSING_INPUT 4 #define GHCB_ERR_INVALID_INPUT 5 #define GHCB_ERR_INVALID_EVENT 6 #endif
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