Messages in this thread Patch in this message | | | From | Tom Lendacky <> | Subject | [PATCH] x86/sev: Return an error on a returned non-zero SW_EXITINFO1[31:0] | Date | Thu, 30 Sep 2021 23:42:01 -0500 |
| |
After returning from a VMGEXIT NAE event, SW_EXITINFO1[31:0] is checked for a value of 1, which indicates an error and that SW_EXITINFO2 contains exception information. However, future versions of the GHCB specification may define new values for SW_EXITINFO1[31:0], so really any non-zero value should be treated as an error.
Fixes: 597cfe48212a ("x86/boot/compressed/64: Setup a GHCB-based VC Exception handler") Cc: <stable@vger.kernel.org> # 5.10+ Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> --- arch/x86/kernel/sev-shared.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/arch/x86/kernel/sev-shared.c b/arch/x86/kernel/sev-shared.c index 34f20e08dc46..ff1e82ff52d9 100644 --- a/arch/x86/kernel/sev-shared.c +++ b/arch/x86/kernel/sev-shared.c @@ -130,6 +130,8 @@ static enum es_result sev_es_ghcb_hv_call(struct ghcb *ghcb, } else { ret = ES_VMM_ERROR; } + } else if (ghcb->save.sw_exit_info_1 & 0xffffffff) { + ret = ES_VMM_ERROR; } else { ret = ES_OK; } -- 2.33.0
| |