qemu-kvm/0021-rhel-Set-host-phys-bits-limit-48-on-rhel-machine-typ.patch
Danilo C. L. de Paula 4b3f8a9dfe * Thu May 16 2019 Danilo Cesar Lemes de Paula <ddepaula@redhat.com> - 4.0.0-1.el8
- 4.0.0 temporary rebase
- Resolves: bz#1705235
  (Rebase qemu-kvm for RHEL-AV 8.1.0)
2019-05-16 15:50:01 -03:00

63 lines
2.0 KiB
Diff

From 26606676d9d88c3f301fb8b3d39941ceff267af5 Mon Sep 17 00:00:00 2001
From: "plai@redhat.com" <plai@redhat.com>
Date: Mon, 13 May 2019 16:27:20 +0200
Subject: rhel: Set host-phys-bits-limit=48 on rhel machine-types
RH-Author: plai@redhat.com
Message-id: <1553276715-26278-3-git-send-email-plai@redhat.com>
Patchwork-id: 85126
O-Subject: [RHEL8.0 qemu-kvm PATCH 2/2] rhel: Set host-phys-bits-limit=48 on rhel machine-types
Bugzilla: 1688915
RH-Acked-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
RH-Acked-by: Eduardo Habkost <ehabkost@redhat.com>
RH-Acked-by: Michael S. Tsirkin <mst@redhat.com>
From: Eduardo Habkost <ehabkost@redhat.com>
Upstream status: not applicable
Currently we use the host physical address size by default on
VMs. This was a good default on most cases, but this is not the
case on host CPUs supporting 5-level EPT. On those cases, we
want VMs to use 4-level EPT by default.
Ensure VMs will use 4-level EPT by default, by limiting physical
address bits to 48.
Not applicable upstream because upstream doesn't set
host-phys-bits=on by default.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
(cherry picked from commit 01a2ecb4c38fe4a35455ea706e76984ee8d5a769)
Signed-off-by: Paul Lai <plai@redhat.com>
Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
Rebase notes (4.0.0):
- update to no compat format
Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
---
hw/i386/pc.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 03497eed9a..91a4c5833a 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -360,6 +360,11 @@ GlobalProperty pc_rhel_compat[] = {
.property = "host-phys-bits",
.value = "on",
},
+ { /* PC_RHEL_COMPAT */
+ .driver = TYPE_X86_CPU,
+ .property = "host-phys-bits-limit",
+ .value = "48",
+ },
{ /* PC_RHEL_COMPAT bz 1508330 */
.driver = "vfio-pci",
.property = "x-no-geforce-quirks",
--
2.20.1