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Tue, 16 Jul 2019 21:43:01 +0000 Received: from abhmp0013.oracle.com (abhmp0013.oracle.com [141.146.116.19]) by aserv0121.oracle.com (8.14.4/8.13.8) with ESMTP id x6GLh1Nx011684; Tue, 16 Jul 2019 21:43:01 GMT Received: from mhkanda-aus-1.us.oracle.com (/10.135.188.192) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Tue, 16 Jul 2019 21:43:01 +0000 From: Mark Kanda To: qemu-devel@nongnu.org Date: Tue, 16 Jul 2019 16:44:11 -0500 Message-Id: <1563313451-19861-2-git-send-email-mark.kanda@oracle.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1563313451-19861-1-git-send-email-mark.kanda@oracle.com> References: <1563313451-19861-1-git-send-email-mark.kanda@oracle.com> X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9320 signatures=668688 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=1 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=943 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1907160259 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9320 signatures=668688 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=998 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1907160259 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [generic] X-Received-From: 141.146.126.78 Subject: [Qemu-devel] [PATCH-for-4.2 1/1] Only enable the halt poll control MSR if it is supported by the host X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: pbonzini@redhat.com, mtosatti@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" The halt poll control MSR should only be enabled on hosts which support it. Fixes: ("kvm: i386: halt poll control MSR support") Signed-off-by: Mark Kanda --- target/i386/cpu.c | 8 +++++++- target/i386/kvm.c | 2 -- target/i386/machine.c | 1 - 3 files changed, 7 insertions(+), 4 deletions(-) diff --git a/target/i386/cpu.c b/target/i386/cpu.c index a8bafdb8b9..dacbf7a9fe 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -2838,7 +2838,6 @@ static PropValue kvm_default_props[] = { { "kvm-asyncpf", "on" }, { "kvm-steal-time", "on" }, { "kvm-pv-eoi", "on" }, - { "kvm-poll-control", "on" }, { "kvmclock-stable-bit", "on" }, { "x2apic", "on" }, { "acpi", "off" }, @@ -5109,6 +5108,13 @@ static void x86_cpu_expand_features(X86CPU *cpu, Error **errp) env->cpuid_xlevel2 = env->cpuid_min_xlevel2; } + /* Enable the halt poll control MSR if it is supported by the host */ + if (x86_cpu_get_supported_feature_word(FEAT_KVM, cpu->migratable) & + (1 << KVM_FEATURE_POLL_CONTROL)) { + env->features[FEAT_KVM] |= 1 << KVM_FEATURE_POLL_CONTROL; + env->poll_control_msr = 1; + } + out: if (local_err != NULL) { error_propagate(errp, local_err); diff --git a/target/i386/kvm.c b/target/i386/kvm.c index cb22684139..81dd5d2c1b 100644 --- a/target/i386/kvm.c +++ b/target/i386/kvm.c @@ -1796,8 +1796,6 @@ void kvm_arch_reset_vcpu(X86CPU *cpu) hyperv_x86_synic_reset(cpu); } - /* enabled by default */ - env->poll_control_msr = 1; } void kvm_arch_do_init_vcpu(X86CPU *cpu) diff --git a/target/i386/machine.c b/target/i386/machine.c index 20077a8a5a..9d6095b264 100644 --- a/target/i386/machine.c +++ b/target/i386/machine.c @@ -394,7 +394,6 @@ static bool steal_time_msr_needed(void *opaque) return cpu->env.steal_time_msr != 0; } -/* Poll control MSR enabled by default */ static bool poll_control_msr_needed(void *opaque) { X86CPU *cpu = opaque; -- 2.21.0