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(parent: 5363952) | patch
KVM: x86/xen: Kernel acceleration for XENVER_version
authorDavid Woodhouse <dwmw@amazon.co.uk>
Thu, 3 Mar 2022 15:41:23 +0000 (15:41 +0000)
committerPaolo Bonzini <pbonzini@redhat.com>
Sat, 2 Apr 2022 09:41:16 +0000 (05:41 -0400)
commit28d1629f751c4a5f9437fbaa0ee4ed81d1a8e587
tree7bb6ea3c92b73d698db299b5c6edff4bfc678d0btree | snapshot
parent536395260582be7443b0b35b0bbb89ffe3947f62commit | diff
KVM: x86/xen: Kernel acceleration for XENVER_version

Turns out this is a fast path for PV guests because they use it to
trigger the event channel upcall. So letting it bounce all the way up
to userspace is not great.

Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20220303154127.202856-14-dwmw2@infradead.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
arch/x86/include/asm/kvm_host.h diff | blob | history
arch/x86/kvm/xen.c diff | blob | history
include/uapi/linux/kvm.h diff | blob | history
Domain: System / Kernel;