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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@google.com>
AuthorDate: Thu, 17 Mar 2022 14:19:13 -07:00
Committer: Borislav Petkov <bp@suse.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@google.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Joerg Roedel <jroedel@suse.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);
}
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