x86/boot/compressed/64: Setup a GHCB-based VC Exception handler

[linux-2.6-microblaze.git] / arch / x86 / include / asm / sev-es.h

diff --git a/arch/x86/include/asm/sev-es.h b/arch/x86/include/asm/sev-es.h
index 48a4403..6dc5244 100644 (file)
--- a/arch/x86/include/asm/sev-es.h
+++ b/arch/x86/include/asm/sev-es.h
@@ -9,7 +9,14 @@
 #define __ASM_ENCRYPTED_STATE_H
 
 #include <linux/types.h>
+#include <asm/insn.h>
 
+#define GHCB_SEV_INFO          0x001UL
+#define GHCB_SEV_INFO_REQ      0x002UL
+#define                GHCB_INFO(v)            ((v) & 0xfffUL)
+#define                GHCB_PROTO_MAX(v)       (((v) >> 48) & 0xffffUL)
+#define                GHCB_PROTO_MIN(v)       (((v) >> 32) & 0xffffUL)
+#define                GHCB_PROTO_OUR          0x0001UL
 #define GHCB_SEV_CPUID_REQ     0x004UL
 #define                GHCB_CPUID_REQ_EAX      0
 #define                GHCB_CPUID_REQ_EBX      1
@@ -19,12 +26,44 @@
                                        (((unsigned long)reg & 3) << 30) | \
                                        (((unsigned long)fn) << 32))
 
+#define        GHCB_PROTOCOL_MAX       0x0001UL
+#define GHCB_DEFAULT_USAGE     0x0000UL
+
 #define GHCB_SEV_CPUID_RESP    0x005UL
 #define GHCB_SEV_TERMINATE     0x100UL
+#define                GHCB_SEV_TERMINATE_REASON(reason_set, reason_val)       \
+                       (((((u64)reason_set) &  0x7) << 12) |           \
+                        ((((u64)reason_val) & 0xff) << 16))
+#define                GHCB_SEV_ES_REASON_GENERAL_REQUEST      0
+#define                GHCB_SEV_ES_REASON_PROTOCOL_UNSUPPORTED 1
 
 #define        GHCB_SEV_GHCB_RESP_CODE(v)      ((v) & 0xfff)
 #define        VMGEXIT()                       { asm volatile("rep; vmmcall\n\r"); }
 
+enum es_result {
+       ES_OK,                  /* All good */
+       ES_UNSUPPORTED,         /* Requested operation not supported */
+       ES_VMM_ERROR,           /* Unexpected state from the VMM */
+       ES_DECODE_FAILED,       /* Instruction decoding failed */
+       ES_EXCEPTION,           /* Instruction caused exception */
+       ES_RETRY,               /* Retry instruction emulation */
+};
+
+struct es_fault_info {
+       unsigned long vector;
+       unsigned long error_code;
+       unsigned long cr2;
+};
+
+struct pt_regs;
+
+/* ES instruction emulation context */
+struct es_em_ctxt {
+       struct pt_regs *regs;
+       struct insn insn;
+       struct es_fault_info fi;
+};
+
 void do_vc_no_ghcb(struct pt_regs *regs, unsigned long exit_code);
 
 static inline u64 lower_bits(u64 val, unsigned int bits)