[35/97] docs: recommend use of md-clear feature on all Intel CPUs

Commit Message

Michael Roth Oct. 1, 2019, 11:45 p.m. UTC

From: Daniel P. Berrangé <[e-mail]>

Update x86 CPU model guidance to recommend that the md-clear feature is
manually enabled with all Intel CPU models, when supported by the host
microcode.

Signed-off-by: Daniel P. Berrangé <[e-mail]>
Message-Id: <[e-mail]>
Signed-off-by: Eduardo Habkost <[e-mail]>
(cherry picked from commit 2c7e82a30774730100da9dbe68d2360459030d91)
Signed-off-by: Oguz Bektas <[e-mail]>
Signed-off-by: Michael Roth <[e-mail]>
---
 docs/qemu-cpu-models.texi | 12 ++++++++++++
 1 file changed, 12 insertions(+)

Patch

diff --git a/docs/qemu-cpu-models.texi b/docs/qemu-cpu-models.texi
index 23c11dc86f..ad040cfc98 100644
--- a/docs/qemu-cpu-models.texi
+++ b/docs/qemu-cpu-models.texi
@@ -200,6 +200,18 @@  Not included by default in any Intel CPU model.
 Should be explicitly turned on for all Intel CPU models.
 
 Note that not all CPU hardware will support this feature.
+
+@item @code{md-clear}
+
+Required to confirm the MDS (CVE-2018-12126, CVE-2018-12127, CVE-2018-12130,
+CVE-2019-11091) fixes.
+
+Not included by default in any Intel CPU model.
+
+Must be explicitly turned on for all Intel CPU models.
+
+Requires the host CPU microcode to support this feature before it
+can be used for guest CPUs.
 @end table