linux-kernel - [tip: x86/sev] x86/sev-es: Replace open-coded hlt-loop with sev_es

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <164918684623.389.10520041359552585691.tip-bot2@tip-bot2>
Date:   Tue, 05 Apr 2022 19:27:26 -0000
From:   "tip-bot2 for Peter Gonda" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Peter Gonda <pgonda@...gle.com>, Borislav Petkov <bp@...e.de>,
        Joerg Roedel <jroedel@...e.de>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: x86/sev] x86/sev-es: Replace open-coded hlt-loop with
 sev_es_terminate()

The following commit has been merged into the x86/sev branch of tip:

Commit-ID:     453e580abcdb53f688d5711c68bec96bea35430d
Gitweb:        https://git.kernel.org/tip/453e580abcdb53f688d5711c68bec96bea35430d
Author:        Peter Gonda <pgonda@...gle.com>
AuthorDate:    Thu, 17 Mar 2022 14:19:13 -07:00
Committer:     Borislav Petkov <bp@...e.de>
CommitterDate: Tue, 05 Apr 2022 19:33:55 +02:00

x86/sev-es: Replace open-coded hlt-loop with sev_es_terminate()

Replace the halt loop in handle_vc_boot_ghcb() with an
sev_es_terminate(). The HLT gives the system no indication the guest is
unhappy. The termination request will signal there was an error during
VC handling during boot.

Signed-off-by: Peter Gonda <pgonda@...gle.com>
Signed-off-by: Borislav Petkov <bp@...e.de>
Reviewed-by: Joerg Roedel <jroedel@...e.de>
Link: https://lore.kernel.org/r/20220317211913.1397427-1-pgonda@google.com
---
 arch/x86/kernel/sev.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/arch/x86/kernel/sev.c b/arch/x86/kernel/sev.c
index e6d316a..ae87fbf 100644
--- a/arch/x86/kernel/sev.c
+++ b/arch/x86/kernel/sev.c
@@ -1425,6 +1425,5 @@ bool __init handle_vc_boot_ghcb(struct pt_regs *regs)
 fail:
 	show_regs(regs);
 
-	while (true)
-		halt();
+	sev_es_terminate(GHCB_SEV_ES_GEN_REQ);
 }