diff options
| -rw-r--r-- | arch/x86/coco/tdx/tdx.c | 38 |
1 files changed, 37 insertions, 1 deletions
diff --git a/arch/x86/coco/tdx/tdx.c b/arch/x86/coco/tdx/tdx.c index 669d9e4f2901..fbb991362e4a 100644 --- a/arch/x86/coco/tdx/tdx.c +++ b/arch/x86/coco/tdx/tdx.c @@ -22,6 +22,7 @@ /* TDX hypercall Leaf IDs */ #define TDVMCALL_MAP_GPA 0x10001 +#define TDVMCALL_REPORT_FATAL_ERROR 0x10003 /* MMIO direction */ #define EPT_READ 0 @@ -140,6 +141,41 @@ int tdx_mcall_get_report0(u8 *reportdata, u8 *tdreport) } EXPORT_SYMBOL_GPL(tdx_mcall_get_report0); +static void __noreturn tdx_panic(const char *msg) +{ + struct tdx_hypercall_args args = { + .r10 = TDX_HYPERCALL_STANDARD, + .r11 = TDVMCALL_REPORT_FATAL_ERROR, + .r12 = 0, /* Error code: 0 is Panic */ + }; + union { + /* Define register order according to the GHCI */ + struct { u64 r14, r15, rbx, rdi, rsi, r8, r9, rdx; }; + + char str[64]; + } message; + + /* VMM assumes '\0' in byte 65, if the message took all 64 bytes */ + strncpy(message.str, msg, 64); + + args.r8 = message.r8; + args.r9 = message.r9; + args.r14 = message.r14; + args.r15 = message.r15; + args.rdi = message.rdi; + args.rsi = message.rsi; + args.rbx = message.rbx; + args.rdx = message.rdx; + + /* + * This hypercall should never return and it is not safe + * to keep the guest running. Call it forever if it + * happens to return. + */ + while (1) + __tdx_hypercall(&args, 0); +} + static void tdx_parse_tdinfo(u64 *cc_mask) { struct tdx_module_output out; @@ -172,7 +208,7 @@ static void tdx_parse_tdinfo(u64 *cc_mask) */ td_attr = out.rdx; if (!(td_attr & ATTR_SEPT_VE_DISABLE)) - panic("TD misconfiguration: SEPT_VE_DISABLE attibute must be set.\n"); + tdx_panic("TD misconfiguration: SEPT_VE_DISABLE attribute must be set."); } /* |