From: David Gibson <david@gibson.dropbear.id.au> To: "Cédric Le Goater" <clg@kaod.org> Cc: kvm@vger.kernel.org, kvm-ppc@vger.kernel.org, Paul Mackerras <paulus@samba.org>, linuxppc-dev@lists.ozlabs.org Subject: Re: [PATCH v2 11/16] KVM: introduce a 'mmap' method for KVM devices Date: Mon, 25 Feb 2019 14:33:09 +1100 [thread overview] Message-ID: <20190225033309.GO7668@umbus.fritz.box> (raw) In-Reply-To: <20190222112840.25000-12-clg@kaod.org> [-- Attachment #1: Type: text/plain, Size: 2451 bytes --] On Fri, Feb 22, 2019 at 12:28:35PM +0100, Cédric Le Goater wrote: > Some KVM devices will want to handle special mappings related to the > underlying HW. For instance, the XIVE interrupt controller of the > POWER9 processor has MMIO pages for thread interrupt management and > for interrupt source control that need to be exposed to the guest when > the OS has the required support. > > Signed-off-by: Cédric Le Goater <clg@kaod.org> Ah, when I suggested mmap() on the base device fd, I hadn't realized there wasn't a facility for that yet. Have you discussed this with Paolo? We'll need some core KVM buy in to merge this. > --- > include/linux/kvm_host.h | 1 + > virt/kvm/kvm_main.c | 11 +++++++++++ > 2 files changed, 12 insertions(+) > > diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h > index c38cc5eb7e73..cbf81487b69f 100644 > --- a/include/linux/kvm_host.h > +++ b/include/linux/kvm_host.h > @@ -1223,6 +1223,7 @@ struct kvm_device_ops { > int (*has_attr)(struct kvm_device *dev, struct kvm_device_attr *attr); > long (*ioctl)(struct kvm_device *dev, unsigned int ioctl, > unsigned long arg); > + int (*mmap)(struct kvm_device *dev, struct vm_area_struct *vma); > }; > > void kvm_device_get(struct kvm_device *dev); > diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c > index 585845203db8..84717d8cb5e4 100644 > --- a/virt/kvm/kvm_main.c > +++ b/virt/kvm/kvm_main.c > @@ -2878,6 +2878,16 @@ static long kvm_vcpu_compat_ioctl(struct file *filp, > } > #endif > > +static int kvm_device_mmap(struct file *filp, struct vm_area_struct *vma) > +{ > + struct kvm_device *dev = filp->private_data; > + > + if (dev->ops->mmap) > + return dev->ops->mmap(dev, vma); > + > + return -ENODEV; > +} > + > static int kvm_device_ioctl_attr(struct kvm_device *dev, > int (*accessor)(struct kvm_device *dev, > struct kvm_device_attr *attr), > @@ -2927,6 +2937,7 @@ static const struct file_operations kvm_device_fops = { > .unlocked_ioctl = kvm_device_ioctl, > .release = kvm_device_release, > KVM_COMPAT(kvm_device_ioctl), > + .mmap = kvm_device_mmap, > }; > > struct kvm_device *kvm_device_from_filp(struct file *filp) -- David Gibson | I'll have my music baroque, and my code david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_ | _way_ _around_! http://www.ozlabs.org/~dgibson [-- Attachment #2: signature.asc --] [-- Type: application/pgp-signature, Size: 833 bytes --]
WARNING: multiple messages have this Message-ID (diff)
From: David Gibson <david@gibson.dropbear.id.au> To: "Cédric Le Goater" <clg@kaod.org> Cc: kvm@vger.kernel.org, kvm-ppc@vger.kernel.org, Paul Mackerras <paulus@samba.org>, linuxppc-dev@lists.ozlabs.org Subject: Re: [PATCH v2 11/16] KVM: introduce a 'mmap' method for KVM devices Date: Mon, 25 Feb 2019 03:33:09 +0000 [thread overview] Message-ID: <20190225033309.GO7668@umbus.fritz.box> (raw) In-Reply-To: <20190222112840.25000-12-clg@kaod.org> [-- Attachment #1: Type: text/plain, Size: 2451 bytes --] On Fri, Feb 22, 2019 at 12:28:35PM +0100, Cédric Le Goater wrote: > Some KVM devices will want to handle special mappings related to the > underlying HW. For instance, the XIVE interrupt controller of the > POWER9 processor has MMIO pages for thread interrupt management and > for interrupt source control that need to be exposed to the guest when > the OS has the required support. > > Signed-off-by: Cédric Le Goater <clg@kaod.org> Ah, when I suggested mmap() on the base device fd, I hadn't realized there wasn't a facility for that yet. Have you discussed this with Paolo? We'll need some core KVM buy in to merge this. > --- > include/linux/kvm_host.h | 1 + > virt/kvm/kvm_main.c | 11 +++++++++++ > 2 files changed, 12 insertions(+) > > diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h > index c38cc5eb7e73..cbf81487b69f 100644 > --- a/include/linux/kvm_host.h > +++ b/include/linux/kvm_host.h > @@ -1223,6 +1223,7 @@ struct kvm_device_ops { > int (*has_attr)(struct kvm_device *dev, struct kvm_device_attr *attr); > long (*ioctl)(struct kvm_device *dev, unsigned int ioctl, > unsigned long arg); > + int (*mmap)(struct kvm_device *dev, struct vm_area_struct *vma); > }; > > void kvm_device_get(struct kvm_device *dev); > diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c > index 585845203db8..84717d8cb5e4 100644 > --- a/virt/kvm/kvm_main.c > +++ b/virt/kvm/kvm_main.c > @@ -2878,6 +2878,16 @@ static long kvm_vcpu_compat_ioctl(struct file *filp, > } > #endif > > +static int kvm_device_mmap(struct file *filp, struct vm_area_struct *vma) > +{ > + struct kvm_device *dev = filp->private_data; > + > + if (dev->ops->mmap) > + return dev->ops->mmap(dev, vma); > + > + return -ENODEV; > +} > + > static int kvm_device_ioctl_attr(struct kvm_device *dev, > int (*accessor)(struct kvm_device *dev, > struct kvm_device_attr *attr), > @@ -2927,6 +2937,7 @@ static const struct file_operations kvm_device_fops = { > .unlocked_ioctl = kvm_device_ioctl, > .release = kvm_device_release, > KVM_COMPAT(kvm_device_ioctl), > + .mmap = kvm_device_mmap, > }; > > struct kvm_device *kvm_device_from_filp(struct file *filp) -- David Gibson | I'll have my music baroque, and my code david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_ | _way_ _around_! http://www.ozlabs.org/~dgibson [-- Attachment #2: signature.asc --] [-- Type: application/pgp-signature, Size: 833 bytes --]
next prev parent reply other threads:[~2019-02-25 3:33 UTC|newest] Thread overview: 142+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-02-22 11:28 [PATCH v2 00/16] KVM: PPC: Book3S HV: add XIVE native exploitation mode Cédric Le Goater 2019-02-22 11:28 ` Cédric Le Goater 2019-02-22 11:28 ` [PATCH v2 01/16] powerpc/xive: add OPAL extensions for the XIVE native exploitation support Cédric Le Goater 2019-02-22 11:28 ` Cédric Le Goater 2019-02-24 23:42 ` David Gibson 2019-02-24 23:42 ` David Gibson 2019-02-25 3:50 ` Michael Ellerman 2019-02-25 3:50 ` Michael Ellerman 2019-02-25 10:11 ` Cédric Le Goater 2019-02-25 10:11 ` Cédric Le Goater 2019-02-26 4:21 ` David Gibson 2019-02-26 4:21 ` David Gibson 2019-03-12 18:25 ` Cédric Le Goater 2019-03-12 18:25 ` Cédric Le Goater 2019-02-22 11:28 ` [PATCH v2 02/16] KVM: PPC: Book3S HV: add a new KVM device for the XIVE native exploitation mode Cédric Le Goater 2019-02-22 11:28 ` Cédric Le Goater 2019-02-25 0:08 ` David Gibson 2019-02-25 0:08 ` David Gibson 2019-03-12 11:14 ` Cédric Le Goater 2019-03-12 11:14 ` Cédric Le Goater 2019-02-22 11:28 ` [PATCH v2 03/16] KVM: PPC: Book3S HV: XIVE: introduce a new capability KVM_CAP_PPC_IRQ_XIVE Cédric Le Goater 2019-02-22 11:28 ` Cédric Le Goater 2019-02-25 0:35 ` David Gibson 2019-02-25 0:35 ` David Gibson 2019-02-25 4:59 ` Paul Mackerras 2019-02-25 4:59 ` Paul Mackerras 2019-03-12 14:10 ` Cédric Le Goater 2019-03-12 14:10 ` Cédric Le Goater 2019-03-12 14:03 ` Cédric Le Goater 2019-03-12 14:03 ` Cédric Le Goater 2019-03-13 4:05 ` David Gibson 2019-03-13 4:05 ` David Gibson 2019-02-25 4:35 ` Paul Mackerras 2019-02-25 4:35 ` Paul Mackerras 2019-03-13 8:34 ` Cédric Le Goater 2019-03-13 8:34 ` Cédric Le Goater 2019-03-14 2:29 ` David Gibson 2019-03-14 2:29 ` David Gibson 2019-02-22 11:28 ` [PATCH v2 04/16] KVM: PPC: Book3S HV: XIVE: add a control to initialize a source Cédric Le Goater 2019-02-22 11:28 ` Cédric Le Goater 2019-02-25 2:10 ` David Gibson 2019-02-25 2:10 ` David Gibson 2019-02-26 4:25 ` Paul Mackerras 2019-02-26 4:25 ` Paul Mackerras 2019-02-26 23:20 ` David Gibson 2019-02-26 23:20 ` David Gibson 2019-03-12 15:19 ` Cédric Le Goater 2019-03-12 15:19 ` Cédric Le Goater 2019-03-14 2:15 ` David Gibson 2019-03-14 2:15 ` David Gibson 2019-02-25 5:30 ` Paul Mackerras 2019-02-25 5:30 ` Paul Mackerras 2019-02-22 11:28 ` [PATCH v2 05/16] KVM: PPC: Book3S HV: XIVE: add a control to configure " Cédric Le Goater 2019-02-22 11:28 ` Cédric Le Goater 2019-02-25 2:21 ` David Gibson 2019-02-25 2:21 ` David Gibson 2019-02-22 11:28 ` [PATCH v2 06/16] KVM: PPC: Book3S HV: XIVE: add controls for the EQ configuration Cédric Le Goater 2019-02-22 11:28 ` Cédric Le Goater 2019-02-25 2:39 ` David Gibson 2019-02-25 2:39 ` David Gibson 2019-03-12 17:00 ` Cédric Le Goater 2019-03-12 17:00 ` Cédric Le Goater 2019-03-13 4:03 ` David Gibson 2019-03-13 4:03 ` David Gibson 2019-03-13 8:46 ` Cédric Le Goater 2019-03-13 8:46 ` Cédric Le Goater 2019-03-14 3:29 ` David Gibson 2019-03-14 3:29 ` David Gibson 2019-02-26 5:24 ` Paul Mackerras 2019-02-26 5:24 ` Paul Mackerras 2019-03-13 9:40 ` Cédric Le Goater 2019-03-13 9:40 ` Cédric Le Goater 2019-03-14 2:32 ` David Gibson 2019-03-14 2:32 ` David Gibson 2019-03-14 7:11 ` Cédric Le Goater 2019-03-14 7:11 ` Cédric Le Goater 2019-03-15 0:29 ` David Gibson 2019-03-15 0:29 ` David Gibson 2019-02-22 11:28 ` [PATCH v2 07/16] KVM: PPC: Book3S HV: XIVE: add a global reset control Cédric Le Goater 2019-02-22 11:28 ` Cédric Le Goater 2019-02-25 2:43 ` David Gibson 2019-02-25 2:43 ` David Gibson 2019-02-22 11:28 ` [PATCH v2 08/16] KVM: PPC: Book3S HV: XIVE: add a control to sync the sources Cédric Le Goater 2019-02-22 11:28 ` Cédric Le Goater 2019-02-25 2:45 ` David Gibson 2019-02-25 2:45 ` David Gibson 2019-02-22 11:28 ` [PATCH v2 09/16] KVM: PPC: Book3S HV: XIVE: add a control to dirty the XIVE EQ pages Cédric Le Goater 2019-02-22 11:28 ` Cédric Le Goater 2019-02-25 2:53 ` David Gibson 2019-02-25 2:53 ` David Gibson 2019-03-13 11:48 ` Cédric Le Goater 2019-03-13 11:48 ` Cédric Le Goater 2019-03-14 2:33 ` David Gibson 2019-03-14 2:33 ` David Gibson 2019-02-22 11:28 ` [PATCH v2 10/16] KVM: PPC: Book3S HV: XIVE: add get/set accessors for the VP XIVE state Cédric Le Goater 2019-02-22 11:28 ` Cédric Le Goater 2019-02-25 3:31 ` David Gibson 2019-02-25 3:31 ` David Gibson 2019-03-13 13:19 ` Cédric Le Goater 2019-03-13 13:19 ` Cédric Le Goater 2019-03-14 3:09 ` David Gibson 2019-03-14 3:09 ` David Gibson 2019-03-14 7:08 ` Cédric Le Goater 2019-03-14 7:08 ` Cédric Le Goater 2019-02-22 11:28 ` [PATCH v2 11/16] KVM: introduce a 'mmap' method for KVM devices Cédric Le Goater 2019-02-22 11:28 ` Cédric Le Goater 2019-02-25 3:33 ` David Gibson [this message] 2019-02-25 3:33 ` David Gibson 2019-02-25 10:57 ` Cédric Le Goater 2019-02-25 10:57 ` Cédric Le Goater 2019-02-26 12:52 ` Paolo Bonzini 2019-02-26 12:52 ` Paolo Bonzini 2019-02-26 23:22 ` David Gibson 2019-02-26 23:22 ` David Gibson 2019-02-22 11:28 ` [PATCH v2 12/16] KVM: PPC: Book3S HV: XIVE: add a TIMA mapping Cédric Le Goater 2019-02-22 11:28 ` Cédric Le Goater 2019-02-25 3:42 ` David Gibson 2019-02-25 3:42 ` David Gibson 2019-02-22 11:28 ` [PATCH v2 13/16] KVM: PPC: Book3S HV: XIVE: add a mapping for the source ESB pages Cédric Le Goater 2019-02-22 11:28 ` Cédric Le Goater 2019-02-25 3:47 ` David Gibson 2019-02-25 3:47 ` David Gibson 2019-02-22 11:28 ` [PATCH v2 14/16] KVM: PPC: Book3S HV: XIVE: add passthrough support Cédric Le Goater 2019-02-22 11:28 ` Cédric Le Goater 2019-02-25 4:13 ` David Gibson 2019-02-25 4:13 ` David Gibson 2019-02-22 11:28 ` [PATCH v2 15/16] KVM: introduce a KVM_DESTROY_DEVICE ioctl Cédric Le Goater 2019-02-22 11:28 ` Cédric Le Goater 2019-02-25 4:15 ` David Gibson 2019-02-25 4:15 ` David Gibson 2019-03-13 8:02 ` Cédric Le Goater 2019-03-13 8:02 ` Cédric Le Goater 2019-03-15 17:57 ` Paolo Bonzini 2019-03-15 17:57 ` Paolo Bonzini 2019-02-22 11:28 ` [PATCH v2 16/16] KVM: PPC: Book3S HV: XIVE: clear the vCPU interrupt presenters Cédric Le Goater 2019-02-22 11:28 ` Cédric Le Goater 2019-02-25 4:18 ` David Gibson 2019-02-25 4:18 ` David Gibson 2019-03-13 8:17 ` Cédric Le Goater 2019-03-13 8:17 ` Cédric Le Goater 2019-03-14 2:26 ` David Gibson 2019-03-14 2:26 ` David Gibson
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