From: Tom Lendacky <thomas.lendacky@amd.com>
To: linux-kernel@vger.kernel.org, x86@kernel.org
Cc: Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
"H. Peter Anvin" <hpa@zytor.com>, Joerg Roedel <jroedel@suse.de>
Subject: [PATCH] x86/sev-es: Use GHCB accessor for setting the MMIO scratch buffer
Date: Fri, 25 Sep 2020 08:38:26 -0500 [thread overview]
Message-ID: <ba84deabdf44a7a880454fb351d189c6ad79d4ba.1601041106.git.thomas.lendacky@amd.com> (raw)
From: Tom Lendacky <thomas.lendacky@amd.com>
Use ghcb_set_sw_scratch() to set the GHCB scratch field, which will also
set the corresponding bit in the GHCB valid_bitmap field.
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
---
arch/x86/kernel/sev-es.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/kernel/sev-es.c b/arch/x86/kernel/sev-es.c
index 6fcfdd32769f..4a96726fbaf8 100644
--- a/arch/x86/kernel/sev-es.c
+++ b/arch/x86/kernel/sev-es.c
@@ -751,7 +751,7 @@ static enum es_result vc_do_mmio(struct ghcb *ghcb, struct es_em_ctxt *ctxt,
/* Can never be greater than 8 */
exit_info_2 = bytes;
- ghcb->save.sw_scratch = ghcb_pa + offsetof(struct ghcb, shared_buffer);
+ ghcb_set_sw_scratch(ghcb, ghcb_pa + offsetof(struct ghcb, shared_buffer));
return sev_es_ghcb_hv_call(ghcb, ctxt, exit_code, exit_info_1, exit_info_2);
}
--
2.28.0
next reply other threads:[~2020-09-25 13:39 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-25 13:38 Tom Lendacky [this message]
2020-09-25 13:41 ` Joerg Roedel
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