diff options
Diffstat (limited to 'arch/x86/virt/vmx/tdx/tdxcall.S')
| -rw-r--r-- | arch/x86/virt/vmx/tdx/tdxcall.S | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/arch/x86/virt/vmx/tdx/tdxcall.S b/arch/x86/virt/vmx/tdx/tdxcall.S index 3f0b83a9977e..016a2a1ec1d6 100644 --- a/arch/x86/virt/vmx/tdx/tdxcall.S +++ b/arch/x86/virt/vmx/tdx/tdxcall.S @@ -1,6 +1,7 @@ /* SPDX-License-Identifier: GPL-2.0 */ #include <asm/asm-offsets.h> #include <asm/frame.h> +#include <asm/asm.h> #include <asm/tdx.h> /* @@ -85,6 +86,7 @@ .endif /* \saved */ .if \host +.Lseamcall\@: seamcall /* * SEAMCALL instruction is essentially a VMExit from VMX root @@ -191,11 +193,28 @@ .if \host .Lseamcall_vmfailinvalid\@: mov $TDX_SEAMCALL_VMFAILINVALID, %rax + jmp .Lseamcall_fail\@ + +.Lseamcall_trap\@: + /* + * SEAMCALL caused #GP or #UD. By reaching here RAX contains + * the trap number. Convert the trap number to the TDX error + * code by setting TDX_SW_ERROR to the high 32-bits of RAX. + * + * Note cannot OR TDX_SW_ERROR directly to RAX as OR instruction + * only accepts 32-bit immediate at most. + */ + movq $TDX_SW_ERROR, %rdi + orq %rdi, %rax + +.Lseamcall_fail\@: .if \ret && \saved /* pop the unused structure pointer back to RSI */ popq %rsi .endif jmp .Lout\@ + + _ASM_EXTABLE_FAULT(.Lseamcall\@, .Lseamcall_trap\@) .endif /* \host */ .endm |