diff options
Diffstat (limited to 'arch/x86/include/asm/tdx.h')
| -rw-r--r-- | arch/x86/include/asm/tdx.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/arch/x86/include/asm/tdx.h b/arch/x86/include/asm/tdx.h index e5dd1cb0e1a1..24c0357081bd 100644 --- a/arch/x86/include/asm/tdx.h +++ b/arch/x86/include/asm/tdx.h @@ -24,6 +24,11 @@ #define TDX_SEAMCALL_GP (TDX_SW_ERROR | X86_TRAP_GP) #define TDX_SEAMCALL_UD (TDX_SW_ERROR | X86_TRAP_UD) +/* + * TDX module SEAMCALL leaf function error codes + */ +#define TDX_RND_NO_ENTROPY 0x8000020300000000ULL + #ifndef __ASSEMBLY__ /* @@ -84,6 +89,27 @@ 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)) #else static inline void tdx_init(void) { } #endif /* CONFIG_INTEL_TDX_HOST */ |