Re: [PATCH] qemu: support kvm-pv-ipi off

QEMU version 3.1 introduced PV_SEND_IPI CPUID feature bit under commit 7f710c32bb8 (target-i386: adds PV_SEND_IPI CPUID feature bit). This patch adds a new KVM feature 'pv-ipi' to disable this feature (enabled by default). Newer CPU platform (Ex, AMD Zen2) supports hardware accelation for IPI in guest, to use this feature to get better performance in some scenarios. Detailed about the discussion: https://lkml.org/lkml/2021/10/20/423 To disable kvm-pv-ipi and have libvirt add "-cpu host,kvm-pv-ipi=off" to the QEMU command line, the following XML code needs to be added to the guest's domain description: <features> <kvm> <pv-ipi state='off'/> </kvm> </features> Signed-off-by: zhenwei pi <pizhenwei(a)bytedance.com&gt; --- docs/formatdomain.rst | 2 ++ docs/schemas/domaincommon.rng | 5 +++++ src/conf/domain_conf.c | 3 +++ src/conf/domain_conf.h | 1 + src/qemu/qemu_command.c | 5 +++++ 5 files changed, 16 insertions(+)