Accepting request 582028 from home:bfrogers:branches:Virtualization
Fix example qemu-ifup script and eliminate bogus use of CPUID_7_0_EDX_PRED_CMD OBS-URL: https://build.opensuse.org/request/show/582028 OBS-URL: https://build.opensuse.org/package/show/Virtualization/qemu?expand=0&rev=396
This commit is contained in:
Bruce Rogers
Git OBS Bridge
parent
06ba5dd4d1
commit
b856b40027
@ -1,4 +1,4 @@
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From 4e5e2c853977dc27ddab5937e55d181e7f1b5d2a Mon Sep 17 00:00:00 2001
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From 5d4a265705e98952cc849c59ba3118f8a79515aa Mon Sep 17 00:00:00 2001
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From: Bruce Rogers <brogers@suse.com>
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Date: Thu, 22 Feb 2018 04:48:07 -0700
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Subject: [PATCH] i386: Compensate for KVM SPEC_CTRL feature availability bug
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@ -13,14 +13,14 @@ simply relying on KVM for that information.
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Signed-off-by: Bruce Rogers <brogers@suse.com>
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---
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target/i386/cpu.c | 8 ++++++++
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1 file changed, 8 insertions(+)
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target/i386/cpu.c | 7 +++++++
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1 file changed, 7 insertions(+)
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diff --git a/target/i386/cpu.c b/target/i386/cpu.c
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index a7e27f3bbf..5c34175f3f 100644
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index a7e27f3bbf..27b40fc81f 100644
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--- a/target/i386/cpu.c
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+++ b/target/i386/cpu.c
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@@ -2824,6 +2824,14 @@ static uint32_t x86_cpu_get_supported_feature_word(FeatureWord w,
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@@ -2824,6 +2824,13 @@ static uint32_t x86_cpu_get_supported_feature_word(FeatureWord w,
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r = kvm_arch_get_supported_cpuid(kvm_state, wi->cpuid_eax,
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wi->cpuid_ecx,
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wi->cpuid_reg);
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@ -29,8 +29,7 @@ index a7e27f3bbf..5c34175f3f 100644
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+ if (w == FEAT_7_0_EDX) {
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+ uint32_t edx;
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+ host_cpuid(7, 0, NULL, NULL, NULL, &edx);
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+#define CPUID_7_0_EDX_PRED_CMD (1U << 27)
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+ r |= edx & (CPUID_7_0_EDX_SPEC_CTRL | CPUID_7_0_EDX_PRED_CMD);
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+ r |= edx & CPUID_7_0_EDX_SPEC_CTRL;
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+ }
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} else if (tcg_enabled()) {
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r = wi->tcg_features;
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@ -7,7 +7,7 @@ echo 'configuring qemu network with bridge for' $*
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# If bridge is not specified, try device with default route.
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bridge=$2
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if [ -z "$bridge" ]; then
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bridge=$(/sbin/ip route list | /usr/bin/awk '/^default / { print $5 }')
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bridge=$(/usr/sbin/ip route list | /usr/bin/awk '/^default / { print $5 }')
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fi
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# Exit if $bridge is not a bridge. Exit with 0 status
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@ -19,5 +19,5 @@ then
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exit 0
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fi
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/sbin/ip link set $1 up
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/sbin/brctl addif $bridge $1 || true
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/usr/sbin/ip link set $1 up
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/usr/sbin/ip link set $1 master $bridge || true
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@ -19,7 +19,7 @@
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Name: qemu-linux-user
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Url: http://www.qemu.org/
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Summary: CPU emulator for user space
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License: BSD-3-Clause AND GPL-2.0 AND GPL-2.0+ AND LGPL-2.1+ AND MIT
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License: BSD-3-Clause AND GPL-2.0-only AND GPL-2.0-or-later AND LGPL-2.1-or-later AND MIT
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Group: System/Emulators/PC
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Version: 2.11.1
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Release: 0
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@ -1,3 +1,20 @@
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-------------------------------------------------------------------
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Fri Mar 2 16:31:15 UTC 2018 - brogers@suse.com
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- Change example qemu-ifup script to not depend on bridge-utils.
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Also update the paths used for ip binary.
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-------------------------------------------------------------------
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Wed Feb 28 16:13:08 UTC 2018 - brogers@suse.com
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- Eliminate bogus use of CPUID_7_0_EDX_PRED_CMD which we've
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carried since the initial Spectre v2 patch was added. EDX bit
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27 of CPUID Leaf 07H, Sub-leaf 0 provides status on STIBP, and
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not the PRED_CMD MSR. Exposing the STIBP CPUID feature bit to the
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guest is wrong in general, since the VM doesn't directly control
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the scheduling of physical hyperthreads. This is left strictly to
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the L0 hypervisor.
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-------------------------------------------------------------------
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Thu Feb 22 12:01:21 UTC 2018 - brogers@suse.com
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@ -107,7 +107,7 @@
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Name: qemu-testsuite
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Url: http://www.qemu.org/
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Summary: Machine emulator and virtualizer
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License: BSD-3-Clause AND GPL-2.0 AND GPL-2.0+ AND LGPL-2.1+ AND MIT
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License: BSD-3-Clause AND GPL-2.0-only AND GPL-2.0-or-later AND LGPL-2.1-or-later AND MIT
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Group: System/Emulators/PC
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Version: 2.11.1
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Release: 0
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17
qemu.changes
17
qemu.changes
@ -1,3 +1,20 @@
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-------------------------------------------------------------------
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Fri Mar 2 16:31:15 UTC 2018 - brogers@suse.com
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- Change example qemu-ifup script to not depend on bridge-utils.
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Also update the paths used for ip binary.
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-------------------------------------------------------------------
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Wed Feb 28 16:13:08 UTC 2018 - brogers@suse.com
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- Eliminate bogus use of CPUID_7_0_EDX_PRED_CMD which we've
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carried since the initial Spectre v2 patch was added. EDX bit
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27 of CPUID Leaf 07H, Sub-leaf 0 provides status on STIBP, and
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not the PRED_CMD MSR. Exposing the STIBP CPUID feature bit to the
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guest is wrong in general, since the VM doesn't directly control
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the scheduling of physical hyperthreads. This is left strictly to
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the L0 hypervisor.
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-------------------------------------------------------------------
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Thu Feb 22 12:01:21 UTC 2018 - brogers@suse.com
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@ -107,7 +107,7 @@
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Name: qemu
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Url: http://www.qemu.org/
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Summary: Machine emulator and virtualizer
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License: BSD-3-Clause AND GPL-2.0 AND GPL-2.0+ AND LGPL-2.1+ AND MIT
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License: BSD-3-Clause AND GPL-2.0-only AND GPL-2.0-or-later AND LGPL-2.1-or-later AND MIT
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Group: System/Emulators/PC
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Version: 2.11.1
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Release: 0
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