diff options
Diffstat (limited to 'arch/x86/include/asm/tdx.h')
| -rw-r--r-- | arch/x86/include/asm/tdx.h | 70 |
1 files changed, 53 insertions, 17 deletions
diff --git a/arch/x86/include/asm/tdx.h b/arch/x86/include/asm/tdx.h index 020c81a7c729..eba178996d84 100644 --- a/arch/x86/include/asm/tdx.h +++ b/arch/x86/include/asm/tdx.h @@ -5,7 +5,10 @@ #include <linux/init.h> #include <linux/bits.h> + +#include <asm/errno.h> #include <asm/ptrace.h> +#include <asm/trapnr.h> #include <asm/shared/tdx.h> /* @@ -18,22 +21,18 @@ #define TDX_SW_ERROR (TDX_ERROR | GENMASK_ULL(47, 40)) #define TDX_SEAMCALL_VMFAILINVALID (TDX_SW_ERROR | _UL(0xFFFF0000)) -#ifndef __ASSEMBLY__ +#define TDX_SEAMCALL_GP (TDX_SW_ERROR | X86_TRAP_GP) +#define TDX_SEAMCALL_UD (TDX_SW_ERROR | X86_TRAP_UD) /* - * Used to gather the output registers values of the TDCALL and SEAMCALL - * instructions when requesting services from the TDX module. - * - * This is a software only structure and not part of the TDX module/VMM ABI. + * TDX module SEAMCALL leaf function error codes */ -struct tdx_module_output { - u64 rcx; - u64 rdx; - u64 r8; - u64 r9; - u64 r10; - u64 r11; -}; +#define TDX_SUCCESS 0ULL +#define TDX_RND_NO_ENTROPY 0x8000020300000000ULL + +#ifndef __ASSEMBLY__ + +#include <uapi/asm/mce.h> /* * Used by the #VE exception handler to gather the #VE exception @@ -55,10 +54,6 @@ struct ve_info { void __init tdx_early_init(void); -/* Used to communicate with the TDX module */ -u64 __tdx_module_call(u64 fn, u64 rcx, u64 rdx, u64 r8, u64 r9, - struct tdx_module_output *out); - void tdx_get_ve_info(struct ve_info *ve); bool tdx_handle_virt_exception(struct pt_regs *regs, struct ve_info *ve); @@ -67,6 +62,10 @@ void tdx_safe_halt(void); bool tdx_early_handle_ve(struct pt_regs *regs); +int tdx_mcall_get_report0(u8 *reportdata, u8 *tdreport); + +u64 tdx_hcall_get_quote(u8 *buf, size_t size); + #else static inline void tdx_early_init(void) { }; @@ -87,5 +86,42 @@ static inline long tdx_kvm_hypercall(unsigned int nr, unsigned long p1, return -ENODEV; } #endif /* CONFIG_INTEL_TDX_GUEST && CONFIG_KVM_GUEST */ + +#ifdef CONFIG_INTEL_TDX_HOST +u64 __seamcall(u64 fn, struct tdx_module_args *args); +u64 __seamcall_ret(u64 fn, struct tdx_module_args *args); +u64 __seamcall_saved_ret(u64 fn, struct tdx_module_args *args); +void tdx_init(void); + +#include <asm/archrandom.h> + +typedef u64 (*sc_func_t)(u64 fn, struct tdx_module_args *args); + +static inline u64 sc_retry(sc_func_t func, u64 fn, + struct tdx_module_args *args) +{ + int retry = RDRAND_RETRY_LOOPS; + u64 ret; + + do { + ret = func(fn, args); + } while (ret == TDX_RND_NO_ENTROPY && --retry); + + return ret; +} + +#define seamcall(_fn, _args) sc_retry(__seamcall, (_fn), (_args)) +#define seamcall_ret(_fn, _args) sc_retry(__seamcall_ret, (_fn), (_args)) +#define seamcall_saved_ret(_fn, _args) sc_retry(__seamcall_saved_ret, (_fn), (_args)) +int tdx_cpu_enable(void); +int tdx_enable(void); +const char *tdx_dump_mce_info(struct mce *m); +#else +static inline void tdx_init(void) { } +static inline int tdx_cpu_enable(void) { return -ENODEV; } +static inline int tdx_enable(void) { return -ENODEV; } +static inline const char *tdx_dump_mce_info(struct mce *m) { return NULL; } +#endif /* CONFIG_INTEL_TDX_HOST */ + #endif /* !__ASSEMBLY__ */ #endif /* _ASM_X86_TDX_H */ |