From: Borislav Petkov <bp@suse.de>
Date: Wed, 20 Apr 2022 11:45:49 +0000 (+0200)
Subject: x86/tdx: Annotate a noreturn function
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=5af14c29f7a0e6d1fcee44c4ed4a2d12a49c4a43;p=linux.git

x86/tdx: Annotate a noreturn function

objdump complains:

  vmlinux.o: warning: objtool: __tdx_hypercall()+0x74: unreachable instruction

because __tdx_hypercall_failed() won't return but panic the guest.
Annotate that that is ok and desired.

Fixes: eb94f1b6a70a ("x86/tdx: Add __tdx_module_call() and __tdx_hypercall() helper functions")
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lore.kernel.org/r/20220420115025.5448-1-bp@alien8.de
---

diff --git a/arch/x86/coco/tdx/tdcall.S b/arch/x86/coco/tdx/tdcall.S
index 245888290bb6f..eeb4511dc414e 100644
--- a/arch/x86/coco/tdx/tdcall.S
+++ b/arch/x86/coco/tdx/tdcall.S
@@ -200,5 +200,6 @@ SYM_FUNC_START(__tdx_hypercall)
 .Lpanic:
 	call __tdx_hypercall_failed
 	/* __tdx_hypercall_failed never returns */
+	REACHABLE
 	jmp .Lpanic
 SYM_FUNC_END(__tdx_hypercall)