|
 |
383d26 |
From a402e015f9945358215e63b00d9efae44693ccd5 Mon Sep 17 00:00:00 2001
|
|
|
383d26 |
From: Eduardo Habkost <ehabkost@redhat.com>
|
|
|
383d26 |
Date: Thu, 11 Apr 2019 21:48:46 +0200
|
|
|
383d26 |
Subject: [PATCH 160/163] rhel: Set host-phys-bits-limit=48 on rhel
|
|
|
383d26 |
machine-types
|
|
|
383d26 |
|
|
|
383d26 |
RH-Author: Eduardo Habkost <ehabkost@redhat.com>
|
|
|
383d26 |
Message-id: <20190411214846.8816-3-ehabkost@redhat.com>
|
|
|
383d26 |
Patchwork-id: 85609
|
|
|
383d26 |
O-Subject: [RHEL-7.7 qemu-kvm-rhev PATCH 2/2] rhel: Set host-phys-bits-limit=48 on rhel machine-types
|
|
|
383d26 |
Bugzilla: 1691519
|
|
|
383d26 |
RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
|
|
|
383d26 |
RH-Acked-by: Pankaj Gupta <pagupta@redhat.com>
|
|
|
383d26 |
RH-Acked-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
|
|
|
383d26 |
|
|
|
383d26 |
Upstream status: not applicable
|
|
|
383d26 |
|
|
|
383d26 |
Currently we use the host physical address size by default on
|
|
|
383d26 |
VMs. This was a good default on most cases, but this is not the
|
|
|
383d26 |
case on host CPUs supporting 5-level EPT. On those cases, we
|
|
|
383d26 |
want VMs to use 4-level EPT by default.
|
|
|
383d26 |
|
|
|
383d26 |
Ensure VMs will use 4-level EPT by default, by limiting physical
|
|
|
383d26 |
address bits to 48.
|
|
|
383d26 |
|
|
|
383d26 |
Not applicable upstream because upstream doesn't set
|
|
|
383d26 |
host-phys-bits=on by default.
|
|
|
383d26 |
|
|
|
383d26 |
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
|
|
|
383d26 |
Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
|
|
|
383d26 |
---
|
|
|
383d26 |
include/hw/i386/pc.h | 5 +++++
|
|
|
383d26 |
1 file changed, 5 insertions(+)
|
|
|
383d26 |
|
|
|
383d26 |
diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
|
|
|
383d26 |
index 88e5a92..1e9f252 100644
|
|
|
383d26 |
--- a/include/hw/i386/pc.h
|
|
|
383d26 |
+++ b/include/hw/i386/pc.h
|
|
|
383d26 |
@@ -963,6 +963,11 @@ extern void igd_passthrough_isa_bridge_create(PCIBus *bus, uint16_t gpu_dev_id);
|
|
|
383d26 |
.property = "host-phys-bits",\
|
|
|
383d26 |
.value = "on",\
|
|
|
383d26 |
},\
|
|
|
383d26 |
+ { /* PC_RHEL_COMPAT */ \
|
|
|
383d26 |
+ .driver = TYPE_X86_CPU,\
|
|
|
383d26 |
+ .property = "host-phys-bits-limit",\
|
|
|
383d26 |
+ .value = "48",\
|
|
|
383d26 |
+ },\
|
|
|
383d26 |
{ /* PC_RHEL_COMPAT bz 1508330 */ \
|
|
|
383d26 |
.driver = "vfio-pci",\
|
|
|
383d26 |
.property = "x-no-geforce-quirks",\
|
|
|
383d26 |
--
|
|
|
383d26 |
1.8.3.1
|
|
|
383d26 |
|