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From a2721f63de158e00dda6b043ae8465fb31b8a619 Mon Sep 17 00:00:00 2001
From: Vitaly Kuznetsov <>
Date: Wed, 5 Sep 2018 09:41:52 +0100
Subject: [PATCH 1/4] Re-enable disabled Hyper-V enlightenments

RH-Author: Vitaly Kuznetsov <>
Message-id: <>
Patchwork-id: 82051
O-Subject: [qemu-kvm RHEL8/virt212 PATCH] Re-enable disabled Hyper-V enlightenments
Bugzilla: 1625185
RH-Acked-by: Laszlo Ersek <>
RH-Acked-by: vrozenfe <>
RH-Acked-by: Eduardo Otubo <>

BZ: 1625185
UPSTREAM: downstream only
BREW: 18157023

Partially revert 0d70915c93d. With the latest Win10 update stimer/synic
enlightenments are a must (see BZ#1610461), vpindex is needed for the
upcoming PV TLB flush/IPI support, reset and runtime are enabled for
consistency with upstream (there's no benefit in disabling them).

Signed-off-by: Vitaly Kuznetsov <>
Signed-off-by: Danilo C. L. de Paula <>
 target/i386/cpu.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index e16dba7..0215b20 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -5366,13 +5366,11 @@ static Property x86_cpu_properties[] = {
     DEFINE_PROP_BOOL("hv-vapic", X86CPU, hyperv_vapic, false),
     DEFINE_PROP_BOOL("hv-time", X86CPU, hyperv_time, false),
     DEFINE_PROP_BOOL("hv-crash", X86CPU, hyperv_crash, false),
-#if 0 /* Disabled for Red Hat Enterprise Linux */
     DEFINE_PROP_BOOL("hv-reset", X86CPU, hyperv_reset, false),
     DEFINE_PROP_BOOL("hv-vpindex", X86CPU, hyperv_vpindex, false),
     DEFINE_PROP_BOOL("hv-runtime", X86CPU, hyperv_runtime, false),
     DEFINE_PROP_BOOL("hv-synic", X86CPU, hyperv_synic, false),
     DEFINE_PROP_BOOL("hv-stimer", X86CPU, hyperv_stimer, false),
     DEFINE_PROP_BOOL("hv-frequencies", X86CPU, hyperv_frequencies, false),
     DEFINE_PROP_BOOL("check", X86CPU, check_cpuid, true),
     DEFINE_PROP_BOOL("enforce", X86CPU, enforce_cpuid, false),