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Commit: 76f59742a02d203f51f979c08c179a149b6e4c01
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From dcd270ea2f82749f901df0ba5fa178ce0f73aef3 Mon Sep 17 00:00:00 2001
Message-Id: <dcd270ea2f82749f901df0ba5fa178ce0f73aef3@dist-git>
From: Jiri Denemark <jdenemar@redhat.com>
Date: Fri, 27 Mar 2015 12:48:40 +0100
Subject: [PATCH] RHEL: Hack around changed Broadwell/Haswell CPUs

RHEL-only

Upstream tried to solve the change of Broadwell and Haswell CPUs by
removing rtm and hle features from the corresponding CPU models for new
machine types. Then they reverted this and introduced new *-noTSX models
instead. However, the original fix was backported to RHEL.

This patch makes sure Broadwell and Haswell will always contain rtm and
hle features regardless on RHEL version or machine type used.

https://bugzilla.redhat.com/show_bug.cgi?id=1199446

Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
---
 src/qemu/qemu_command.c                       | 22 +++++++++++++++++++
 tests/qemuxml2argvdata/cpu-Haswell.args       |  2 +-
 .../qemuxml2argvdata/cpu-host-model-cmt.args  |  2 +-
 .../cpu-translation.x86_64-4.0.0.args         |  2 +-
 .../cpu-translation.x86_64-latest.args        |  2 +-
 tests/qemuxml2argvdata/cpu-tsc-frequency.args |  2 +-
 tests/qemuxml2argvdata/q35-acpi-nouefi.args   |  2 +-
 tests/qemuxml2argvdata/q35-acpi-uefi.args     |  2 +-
 tests/qemuxml2argvdata/q35-noacpi-nouefi.args |  2 +-
 9 files changed, 30 insertions(+), 8 deletions(-)

diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index 77977c396e..3bcc2ccd1d 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -6601,6 +6601,8 @@ qemuBuildCpuModelArgStr(virQEMUDriver *driver,
 {
     size_t i;
     virCPUDef *cpu = def->cpu;
+    bool hle = false;
+    bool rtm = false;
 
     switch ((virCPUMode) cpu->mode) {
     case VIR_CPU_MODE_HOST_PASSTHROUGH:
@@ -6667,6 +6669,12 @@ qemuBuildCpuModelArgStr(virQEMUDriver *driver,
     for (i = 0; i < cpu->nfeatures; i++) {
         const char *featname =
             virQEMUCapsCPUFeatureToQEMU(qemuCaps, cpu->features[i].name);
+
+        if (STREQ("rtm", cpu->features[i].name))
+            rtm = true;
+        if (STREQ("hle", cpu->features[i].name))
+            hle = true;
+
         switch ((virCPUFeaturePolicy) cpu->features[i].policy) {
         case VIR_CPU_FEATURE_FORCE:
         case VIR_CPU_FEATURE_REQUIRE:
@@ -6684,6 +6692,20 @@ qemuBuildCpuModelArgStr(virQEMUDriver *driver,
         }
     }
 
+    /* Some versions of qemu-kvm in RHEL provide Broadwell and Haswell CPU
+     * models which lack rtm and hle features when used with some machine
+     * types. Let's make sure Broadwell and Haswell will always have these
+     * features. But only if the features were not explicitly mentioned in
+     * the guest CPU definition.
+     */
+    if (STREQ_NULLABLE(cpu->model, "Broadwell") ||
+        STREQ_NULLABLE(cpu->model, "Haswell")) {
+        if (!rtm)
+            virBufferAddLit(buf, ",rtm=on");
+        if (!hle)
+            virBufferAddLit(buf, ",hle=on");
+    }
+
     return 0;
 }
 
diff --git a/tests/qemuxml2argvdata/cpu-Haswell.args b/tests/qemuxml2argvdata/cpu-Haswell.args
index 6441a4c1eb..4bc2e0bc00 100644
--- a/tests/qemuxml2argvdata/cpu-Haswell.args
+++ b/tests/qemuxml2argvdata/cpu-Haswell.args
@@ -12,7 +12,7 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
 -machine pc,accel=kvm,usb=off,dump-guest-core=off \
--cpu Haswell \
+-cpu Haswell,rtm=on,hle=on \
 -m 214 \
 -realtime mlock=off \
 -smp 6,sockets=6,cores=1,threads=1 \
diff --git a/tests/qemuxml2argvdata/cpu-host-model-cmt.args b/tests/qemuxml2argvdata/cpu-host-model-cmt.args
index 3f17100e5f..81ffd67f37 100644
--- a/tests/qemuxml2argvdata/cpu-host-model-cmt.args
+++ b/tests/qemuxml2argvdata/cpu-host-model-cmt.args
@@ -12,7 +12,7 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
 -machine pc,accel=tcg,usb=off,dump-guest-core=off \
--cpu Haswell,vme=on,ds=on,acpi=on,ss=on,ht=on,tm=on,pbe=on,dtes64=on,monitor=on,ds-cpl=on,vmx=on,smx=on,est=on,tm2=on,xtpr=on,pdcm=on,f16c=on,rdrand=on,pdpe1gb=on,abm=on,lahf-lm=on \
+-cpu Haswell,vme=on,ds=on,acpi=on,ss=on,ht=on,tm=on,pbe=on,dtes64=on,monitor=on,ds-cpl=on,vmx=on,smx=on,est=on,tm2=on,xtpr=on,pdcm=on,f16c=on,rdrand=on,pdpe1gb=on,abm=on,lahf-lm=on,rtm=on,hle=on \
 -m 214 \
 -realtime mlock=off \
 -smp 6,sockets=6,cores=1,threads=1 \
diff --git a/tests/qemuxml2argvdata/cpu-translation.x86_64-4.0.0.args b/tests/qemuxml2argvdata/cpu-translation.x86_64-4.0.0.args
index e98eef243e..427b6f12a4 100644
--- a/tests/qemuxml2argvdata/cpu-translation.x86_64-4.0.0.args
+++ b/tests/qemuxml2argvdata/cpu-translation.x86_64-4.0.0.args
@@ -12,7 +12,7 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
 -machine pc-i440fx-4.0,accel=tcg,usb=off,dump-guest-core=off \
--cpu Haswell,pclmulqdq=on,ds-cpl=on,tsc-adjust=on,fxsr-opt=on,lahf-lm=on,cmp-legacy=on,nodeid-msr=on,perfctr-core=on,perfctr-nb=on,kvm-pv-eoi=on,kvm-pv-unhalt=on \
+-cpu Haswell,pclmulqdq=on,ds-cpl=on,tsc-adjust=on,fxsr-opt=on,lahf-lm=on,cmp-legacy=on,nodeid-msr=on,perfctr-core=on,perfctr-nb=on,rtm=on,hle=on,kvm-pv-eoi=on,kvm-pv-unhalt=on \
 -m 214 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
diff --git a/tests/qemuxml2argvdata/cpu-translation.x86_64-latest.args b/tests/qemuxml2argvdata/cpu-translation.x86_64-latest.args
index c24d8ec201..b3f06a2478 100644
--- a/tests/qemuxml2argvdata/cpu-translation.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/cpu-translation.x86_64-latest.args
@@ -11,7 +11,7 @@ XDG_CONFIG_HOME=/tmp/lib/domain--1-QEMUGuest1/.config \
 -S \
 -object '{"qom-type":"secret","id":"masterKey0","format":"raw","file":"/tmp/lib/domain--1-QEMUGuest1/master-key.aes"}' \
 -machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
--cpu Haswell,pclmulqdq=on,ds-cpl=on,tsc-adjust=on,fxsr-opt=on,lahf-lm=on,cmp-legacy=on,nodeid-msr=on,perfctr-core=on,perfctr-nb=on,kvm-pv-eoi=on,kvm-pv-unhalt=on \
+-cpu Haswell,pclmulqdq=on,ds-cpl=on,tsc-adjust=on,fxsr-opt=on,lahf-lm=on,cmp-legacy=on,nodeid-msr=on,perfctr-core=on,perfctr-nb=on,rtm=on,hle=on,kvm-pv-eoi=on,kvm-pv-unhalt=on \
 -m 214 \
 -object '{"qom-type":"memory-backend-ram","id":"pc.ram","size":224395264}' \
 -overcommit mem-lock=off \
diff --git a/tests/qemuxml2argvdata/cpu-tsc-frequency.args b/tests/qemuxml2argvdata/cpu-tsc-frequency.args
index c6d917f0f4..6063ad16f5 100644
--- a/tests/qemuxml2argvdata/cpu-tsc-frequency.args
+++ b/tests/qemuxml2argvdata/cpu-tsc-frequency.args
@@ -12,7 +12,7 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
 -machine pc,accel=kvm,usb=off,dump-guest-core=off \
--cpu Haswell,vme=on,ds=on,acpi=on,ss=on,ht=on,tm=on,pbe=on,dtes64=on,monitor=on,ds-cpl=on,vmx=on,smx=on,est=on,tm2=on,xtpr=on,pdcm=on,f16c=on,rdrand=on,pdpe1gb=on,abm=on,lahf-lm=on,invtsc=on,tsc-frequency=4567890000 \
+-cpu Haswell,vme=on,ds=on,acpi=on,ss=on,ht=on,tm=on,pbe=on,dtes64=on,monitor=on,ds-cpl=on,vmx=on,smx=on,est=on,tm2=on,xtpr=on,pdcm=on,f16c=on,rdrand=on,pdpe1gb=on,abm=on,lahf-lm=on,invtsc=on,rtm=on,hle=on,tsc-frequency=4567890000 \
 -m 214 \
 -realtime mlock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
diff --git a/tests/qemuxml2argvdata/q35-acpi-nouefi.args b/tests/qemuxml2argvdata/q35-acpi-nouefi.args
index 956ee3b6b7..1b592383a9 100644
--- a/tests/qemuxml2argvdata/q35-acpi-nouefi.args
+++ b/tests/qemuxml2argvdata/q35-acpi-nouefi.args
@@ -12,7 +12,7 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,file=/tmp/lib/domain--1-guest/master-key.aes \
 -machine q35,accel=tcg,usb=off,dump-guest-core=off \
--cpu Haswell \
+-cpu Haswell,rtm=on,hle=on \
 -m 1024 \
 -realtime mlock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
diff --git a/tests/qemuxml2argvdata/q35-acpi-uefi.args b/tests/qemuxml2argvdata/q35-acpi-uefi.args
index 272369de22..303a5176fe 100644
--- a/tests/qemuxml2argvdata/q35-acpi-uefi.args
+++ b/tests/qemuxml2argvdata/q35-acpi-uefi.args
@@ -12,7 +12,7 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,file=/tmp/lib/domain--1-guest/master-key.aes \
 -machine q35,accel=tcg,usb=off,dump-guest-core=off \
--cpu Haswell \
+-cpu Haswell,rtm=on,hle=on \
 -drive file=/usr/share/OVMF/OVMF_CODE.fd,if=pflash,format=raw,unit=0,readonly=on \
 -drive file=/var/lib/libvirt/qemu/nvram/guest_VARS.fd,if=pflash,format=raw,unit=1 \
 -m 1024 \
diff --git a/tests/qemuxml2argvdata/q35-noacpi-nouefi.args b/tests/qemuxml2argvdata/q35-noacpi-nouefi.args
index c6cffeea89..4538a63c24 100644
--- a/tests/qemuxml2argvdata/q35-noacpi-nouefi.args
+++ b/tests/qemuxml2argvdata/q35-noacpi-nouefi.args
@@ -12,7 +12,7 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,file=/tmp/lib/domain--1-guest/master-key.aes \
 -machine q35,accel=tcg,usb=off,dump-guest-core=off \
--cpu Haswell \
+-cpu Haswell,rtm=on,hle=on \
 -m 1024 \
 -realtime mlock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
-- 
2.33.1
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