From mboxrd@z Thu Jan 1 00:00:00 1970 From: Eric B Munson Subject: Re: [PATCH 3/6] Add ioctl for KVM_GUEST_STOPPED Date: Fri, 28 Oct 2011 09:11:57 -0400 Message-ID: <20111028131157.GA5795@mgebm.net> References: <1319570779-8907-1-git-send-email-emunson@mgebm.net> <1319570779-8907-4-git-send-email-emunson@mgebm.net> <20111028015248.GA13000@amt.cnet> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="2fHTh5uZTiUOsy+g" Cc: avi@redhat.com, mingo@redhat.com, x86@kernel.org, hpa@zytor.com, arnd@arndb.de, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, linux-arch@vger.kernel.org, ryanh@linux.vnet.ibm.com, aliguori@us.ibm.com To: Marcelo Tosatti Return-path: Content-Disposition: inline In-Reply-To: <20111028015248.GA13000@amt.cnet> Sender: linux-arch-owner@vger.kernel.org List-Id: kvm.vger.kernel.org --2fHTh5uZTiUOsy+g Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, 27 Oct 2011, Marcelo Tosatti wrote: > On Tue, Oct 25, 2011 at 03:26:16PM -0400, Eric B Munson wrote: > > Now that we have a flag that will tell the guest it was suspended, crea= te an > > interface for that communication using a KVM ioctl. > >=20 > > Signed-off-by: Eric B Munson > > --- > > arch/x86/include/asm/pvclock.h | 3 +++ > > arch/x86/kernel/kvmclock.c | 12 ++++++++++++ > > arch/x86/kvm/x86.c | 5 +++++ > > include/linux/kvm.h | 2 ++ > > 4 files changed, 22 insertions(+), 0 deletions(-) > >=20 > > diff --git a/arch/x86/include/asm/pvclock.h b/arch/x86/include/asm/pvcl= ock.h > > index 7d3ba41..9312814 100644 > > --- a/arch/x86/include/asm/pvclock.h > > +++ b/arch/x86/include/asm/pvclock.h > > @@ -3,6 +3,7 @@ > > =20 > > #include > > #include > > +#include > > =20 > > /* some helper functions for xen and kvm pv clock sources */ > > cycle_t pvclock_clocksource_read(struct pvclock_vcpu_time_info *src); > > @@ -13,6 +14,8 @@ void pvclock_read_wallclock(struct pvclock_wall_clock= *wall, > > struct timespec *ts); > > void pvclock_resume(void); > > =20 > > +void kvm_set_host_stopped(struct kvm_vcpu *vcpu); > > + > > bool kvm_check_and_clear_host_stopped(int cpu); > > =20 > > /* > > diff --git a/arch/x86/kernel/kvmclock.c b/arch/x86/kernel/kvmclock.c > > index 8ddcfaf..f4fff3d 100644 > > --- a/arch/x86/kernel/kvmclock.c > > +++ b/arch/x86/kernel/kvmclock.c > > @@ -22,6 +22,7 @@ > > #include > > #include > > #include > > +#include > > =20 > > #include > > #include > > @@ -113,6 +114,17 @@ static void kvm_get_preset_lpj(void) > > preset_lpj =3D lpj; > > } > > =20 > > +/* > > + * kvm_set_host_stopped() indicates to the guest kernel that it has be= en > > + * stopped by the hypervisor. This function will be called from the h= ost only. > > + */ > > +void kvm_set_host_stopped(struct kvm_vcpu *vcpu) > > +{ > > + struct pvclock_vcpu_time_info *src =3D &vcpu->arch.hv_clock; > > + src->flags |=3D PVCLOCK_GUEST_STOPPED; > > +} > > +EXPORT_SYMBOL_GPL(kvm_set_host_stopped); > > + > > bool kvm_check_and_clear_host_stopped(int cpu) > > { > > bool ret =3D false; > > diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c > > index 84a28ea..16e029e 100644 > > --- a/arch/x86/kvm/x86.c > > +++ b/arch/x86/kvm/x86.c > > @@ -3264,6 +3264,11 @@ long kvm_arch_vcpu_ioctl(struct file *filp, > > =20 > > goto out; > > } > > + case KVM_PAUSE_GUEST: { >=20 > Pause guest?? :) GUEST_PAUSED for the next version. >=20 > > + r =3D 0; > > + kvm_set_host_stopped(vcpu); > > + break; > > + } > > default: > > r =3D -EINVAL; > > } >=20 --2fHTh5uZTiUOsy+g Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iQIcBAEBAgAGBQJOqqodAAoJEKhG9nGc1bpJedcP/0MUpDx3d2B0h15XeZ7r1br1 TWvmYNVK0a1Qt1XCMEfu+imyIu3D1WqN23GUpoU/tTE/G+ZvZ+FSWP+Q44kJDemi WFcQzM4VPM4HSAELh6fAyt+g0HVhiQFdWE4qjViy9+jexd6J3ho2IaEMXHtDS7nK 4vYfVN4eS3ONzoZTc6vkMJSeCRVPmjXThKOT3eqZII5CLi2drB/rI8ecBj+8xkD+ vAvy4J1XeBasJAGZ13vyd5ndnlbLTBJFYkD835PnD3bC65gRLUzIA5ZB44cPCFly VMMTryOzgbI3Yxyey1+Ks86+L230VAvpA4zkoI/HWg0q/TcGeHs0vWoOwtxDuQo4 vk/c3C+prlHSsKYTbKVFNhBjdGagG0d11P+3RAJVqBaGa0gR9rqwMlTmnkuszseT ff/6nsRGyj5WJigIds4sSg8wmRiNOmKu5eS2yZOZaZ2WGdQ6CUd2tObGHhgvsGUf lkmn8eZLYfQVvAaD6/s7D4k5JIS9n4T6HQKdsxa29HyvGki8n4bTAv/cS5wq8jNl OfEG04XV9kEoUfu71JcZCAvrZmu1YaQbxPplyldNEpIseH0Or/mHd8dj4KjG7ZHk nCLMsBjRc/GtOj9ulRtkF01dHXm/s85+HIKpb1U9OWvjcVKHQO6inabot0l+pmwq sra3r5O1bh4fzdr1Kb7b =grzC -----END PGP SIGNATURE----- --2fHTh5uZTiUOsy+g--