From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Gibson Subject: Re: [PATCH v2 02/16] KVM: PPC: Book3S HV: add a new KVM device for the XIVE native exploitation mode Date: Mon, 25 Feb 2019 11:08:48 +1100 Message-ID: <20190225000848.GF7668@umbus.fritz.box> References: <20190222112840.25000-1-clg@kaod.org> <20190222112840.25000-3-clg@kaod.org> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="aPdhxNJGSeOG9wFI" Cc: kvm@vger.kernel.org, kvm-ppc@vger.kernel.org, Paul Mackerras , linuxppc-dev@lists.ozlabs.org To: =?iso-8859-1?Q?C=E9dric?= Le Goater Return-path: Content-Disposition: inline In-Reply-To: <20190222112840.25000-3-clg@kaod.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: linuxppc-dev-bounces+glppe-linuxppc-embedded-2=m.gmane.org@lists.ozlabs.org Sender: "Linuxppc-dev" List-Id: kvm.vger.kernel.org --aPdhxNJGSeOG9wFI Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Fri, Feb 22, 2019 at 12:28:26PM +0100, C=E9dric Le Goater wrote: > This is the basic framework for the new KVM device supporting the XIVE > native exploitation mode. The user interface exposes a new KVM device > to be created by QEMU when running on a L0 hypervisor only. Support > for nested guests is not available yet. >=20 > Signed-off-by: C=E9dric Le Goater > --- > arch/powerpc/include/asm/kvm_host.h | 1 + > arch/powerpc/include/asm/kvm_ppc.h | 8 + > arch/powerpc/include/uapi/asm/kvm.h | 3 + > include/uapi/linux/kvm.h | 2 + > arch/powerpc/kvm/book3s.c | 7 +- > arch/powerpc/kvm/book3s_xive_native.c | 191 +++++++++++++++++++++ > Documentation/virtual/kvm/devices/xive.txt | 19 ++ > arch/powerpc/kvm/Makefile | 2 +- > 8 files changed, 231 insertions(+), 2 deletions(-) > create mode 100644 arch/powerpc/kvm/book3s_xive_native.c > create mode 100644 Documentation/virtual/kvm/devices/xive.txt >=20 > diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/a= sm/kvm_host.h > index 091430339db1..9f75a75a07f2 100644 > --- a/arch/powerpc/include/asm/kvm_host.h > +++ b/arch/powerpc/include/asm/kvm_host.h > @@ -220,6 +220,7 @@ extern struct kvm_device_ops kvm_xics_ops; > struct kvmppc_xive; > struct kvmppc_xive_vcpu; > extern struct kvm_device_ops kvm_xive_ops; > +extern struct kvm_device_ops kvm_xive_native_ops; > =20 > struct kvmppc_passthru_irqmap; > =20 > diff --git a/arch/powerpc/include/asm/kvm_ppc.h b/arch/powerpc/include/as= m/kvm_ppc.h > index b3bf4f61b30c..4b72ddde7dc1 100644 > --- a/arch/powerpc/include/asm/kvm_ppc.h > +++ b/arch/powerpc/include/asm/kvm_ppc.h > @@ -593,6 +593,10 @@ extern int kvmppc_xive_set_icp(struct kvm_vcpu *vcpu= , u64 icpval); > extern int kvmppc_xive_set_irq(struct kvm *kvm, int irq_source_id, u32 i= rq, > int level, bool line_status); > extern void kvmppc_xive_push_vcpu(struct kvm_vcpu *vcpu); > + > +extern void kvmppc_xive_native_init_module(void); > +extern void kvmppc_xive_native_exit_module(void); > + > #else > static inline int kvmppc_xive_set_xive(struct kvm *kvm, u32 irq, u32 ser= ver, > u32 priority) { return -1; } > @@ -616,6 +620,10 @@ static inline int kvmppc_xive_set_icp(struct kvm_vcp= u *vcpu, u64 icpval) { retur > static inline int kvmppc_xive_set_irq(struct kvm *kvm, int irq_source_id= , u32 irq, > int level, bool line_status) { return -ENODEV; } > static inline void kvmppc_xive_push_vcpu(struct kvm_vcpu *vcpu) { } > + > +static inline void kvmppc_xive_native_init_module(void) { } > +static inline void kvmppc_xive_native_exit_module(void) { } > + > #endif /* CONFIG_KVM_XIVE */ > =20 > #ifdef CONFIG_PPC_POWERNV > diff --git a/arch/powerpc/include/uapi/asm/kvm.h b/arch/powerpc/include/u= api/asm/kvm.h > index 8c876c166ef2..b002c0c67787 100644 > --- a/arch/powerpc/include/uapi/asm/kvm.h > +++ b/arch/powerpc/include/uapi/asm/kvm.h > @@ -675,4 +675,7 @@ struct kvm_ppc_cpu_char { > #define KVM_XICS_PRESENTED (1ULL << 43) > #define KVM_XICS_QUEUED (1ULL << 44) > =20 > +/* POWER9 XIVE Native Interrupt Controller */ > +#define KVM_DEV_XIVE_GRP_CTRL 1 > + > #endif /* __LINUX_KVM_POWERPC_H */ > diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h > index 6d4ea4b6c922..e6368163d3a0 100644 > --- a/include/uapi/linux/kvm.h > +++ b/include/uapi/linux/kvm.h > @@ -1211,6 +1211,8 @@ enum kvm_device_type { > #define KVM_DEV_TYPE_ARM_VGIC_V3 KVM_DEV_TYPE_ARM_VGIC_V3 > KVM_DEV_TYPE_ARM_VGIC_ITS, > #define KVM_DEV_TYPE_ARM_VGIC_ITS KVM_DEV_TYPE_ARM_VGIC_ITS > + KVM_DEV_TYPE_XIVE, > +#define KVM_DEV_TYPE_XIVE KVM_DEV_TYPE_XIVE > KVM_DEV_TYPE_MAX, > }; > =20 > diff --git a/arch/powerpc/kvm/book3s.c b/arch/powerpc/kvm/book3s.c > index 601c094f15ab..96d43f091255 100644 > --- a/arch/powerpc/kvm/book3s.c > +++ b/arch/powerpc/kvm/book3s.c > @@ -1040,6 +1040,9 @@ static int kvmppc_book3s_init(void) > if (xics_on_xive()) { > kvmppc_xive_init_module(); > kvm_register_device_ops(&kvm_xive_ops, KVM_DEV_TYPE_XICS); > + kvmppc_xive_native_init_module(); > + kvm_register_device_ops(&kvm_xive_native_ops, > + KVM_DEV_TYPE_XIVE); > } else > #endif > kvm_register_device_ops(&kvm_xics_ops, KVM_DEV_TYPE_XICS); > @@ -1050,8 +1053,10 @@ static int kvmppc_book3s_init(void) > static void kvmppc_book3s_exit(void) > { > #ifdef CONFIG_KVM_XICS > - if (xics_on_xive()) > + if (xics_on_xive()) { > kvmppc_xive_exit_module(); > + kvmppc_xive_native_exit_module(); > + } > #endif > #ifdef CONFIG_KVM_BOOK3S_32_HANDLER > kvmppc_book3s_exit_pr(); > diff --git a/arch/powerpc/kvm/book3s_xive_native.c b/arch/powerpc/kvm/boo= k3s_xive_native.c > new file mode 100644 > index 000000000000..e475ce83ad14 > --- /dev/null > +++ b/arch/powerpc/kvm/book3s_xive_native.c > @@ -0,0 +1,191 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* > + * Copyright (c) 2017-2019, IBM Corporation. > + */ > + > +#define pr_fmt(fmt) "xive-kvm: " fmt > + > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > + > +#include > +#include > + > +#include "book3s_xive.h" > + > +static int kvmppc_xive_native_set_attr(struct kvm_device *dev, > + struct kvm_device_attr *attr) > +{ > + switch (attr->group) { > + case KVM_DEV_XIVE_GRP_CTRL: > + break; > + } > + return -ENXIO; > +} > + > +static int kvmppc_xive_native_get_attr(struct kvm_device *dev, > + struct kvm_device_attr *attr) > +{ > + return -ENXIO; > +} > + > +static int kvmppc_xive_native_has_attr(struct kvm_device *dev, > + struct kvm_device_attr *attr) > +{ > + switch (attr->group) { > + case KVM_DEV_XIVE_GRP_CTRL: > + break; > + } > + return -ENXIO; > +} > + > +static void kvmppc_xive_native_free(struct kvm_device *dev) > +{ > + struct kvmppc_xive *xive =3D dev->private; > + struct kvm *kvm =3D xive->kvm; > + > + debugfs_remove(xive->dentry); > + > + pr_devel("Destroying xive native device\n"); > + > + if (kvm) > + kvm->arch.xive =3D NULL; > + > + if (xive->vp_base !=3D XIVE_INVALID_VP) > + xive_native_free_vp_block(xive->vp_base); > + > + kfree(xive); > + kfree(dev); > +} > + > +static int kvmppc_xive_native_create(struct kvm_device *dev, u32 type) > +{ > + struct kvmppc_xive *xive; > + struct kvm *kvm =3D dev->kvm; > + int ret =3D 0; > + > + pr_devel("Creating xive native device\n"); > + > + if (kvm->arch.xive) > + return -EEXIST; > + > + xive =3D kzalloc(sizeof(*xive), GFP_KERNEL); > + if (!xive) > + return -ENOMEM; > + > + dev->private =3D xive; > + xive->dev =3D dev; > + xive->kvm =3D kvm; > + kvm->arch.xive =3D xive; > + > + /* We use the default queue size set by the host */ IIUC the queue is examined directly by the guest, so the guest must know its size. In which case letting the host decide the size would be a problem for migration. > + xive->q_order =3D xive_native_default_eq_shift(); > + if (xive->q_order < PAGE_SHIFT) > + xive->q_page_order =3D 0; > + else > + xive->q_page_order =3D xive->q_order - PAGE_SHIFT; > + > + /* > + * Allocate a bunch of VPs. KVM_MAX_VCPUS is a large value for > + * a default. Getting the max number of CPUs the VM was > + * configured with would improve our usage of the XIVE VP space. > + */ > + xive->vp_base =3D xive_native_alloc_vp_block(KVM_MAX_VCPUS); > + pr_devel("VP_Base=3D%x\n", xive->vp_base); > + > + if (xive->vp_base =3D=3D XIVE_INVALID_VP) > + ret =3D -ENOMEM; > + > + xive->single_escalation =3D xive_native_has_single_escalation(); > + > + if (ret) > + kfree(xive); > + > + return ret; > +} > + > +static int xive_native_debug_show(struct seq_file *m, void *private) > +{ > + struct kvmppc_xive *xive =3D m->private; > + struct kvm *kvm =3D xive->kvm; > + > + if (!kvm) > + return 0; > + > + return 0; > +} > + > +static int xive_native_debug_open(struct inode *inode, struct file *file) > +{ > + return single_open(file, xive_native_debug_show, inode->i_private); > +} > + > +static const struct file_operations xive_native_debug_fops =3D { > + .open =3D xive_native_debug_open, > + .read =3D seq_read, > + .llseek =3D seq_lseek, > + .release =3D single_release, > +}; > + > +static void xive_native_debugfs_init(struct kvmppc_xive *xive) > +{ > + char *name; > + > + name =3D kasprintf(GFP_KERNEL, "kvm-xive-%p", xive); > + if (!name) { > + pr_err("%s: no memory for name\n", __func__); > + return; > + } > + > + xive->dentry =3D debugfs_create_file(name, 0444, powerpc_debugfs_root, > + xive, &xive_native_debug_fops); > + > + pr_debug("%s: created %s\n", __func__, name); > + kfree(name); > +} > + > +static void kvmppc_xive_native_init(struct kvm_device *dev) > +{ > + struct kvmppc_xive *xive =3D (struct kvmppc_xive *)dev->private; > + > + /* Register some debug interfaces */ > + xive_native_debugfs_init(xive); > +} > + > +struct kvm_device_ops kvm_xive_native_ops =3D { > + .name =3D "kvm-xive-native", > + .create =3D kvmppc_xive_native_create, > + .init =3D kvmppc_xive_native_init, > + .destroy =3D kvmppc_xive_native_free, > + .set_attr =3D kvmppc_xive_native_set_attr, > + .get_attr =3D kvmppc_xive_native_get_attr, > + .has_attr =3D kvmppc_xive_native_has_attr, > +}; > + > +void kvmppc_xive_native_init_module(void) > +{ > + ; > +} > + > +void kvmppc_xive_native_exit_module(void) > +{ > + ; > +} > diff --git a/Documentation/virtual/kvm/devices/xive.txt b/Documentation/v= irtual/kvm/devices/xive.txt > new file mode 100644 > index 000000000000..fdbd2ff92a88 > --- /dev/null > +++ b/Documentation/virtual/kvm/devices/xive.txt > @@ -0,0 +1,19 @@ > +POWER9 eXternal Interrupt Virtualization Engine (XIVE Gen1) > +=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D > + > +Device types supported: > + KVM_DEV_TYPE_XIVE POWER9 XIVE Interrupt Controller generation 1 > + > +This device acts as a VM interrupt controller. It provides the KVM > +interface to configure the interrupt sources of a VM in the underlying > +POWER9 XIVE interrupt controller. > + > +Only one XIVE instance may be instantiated. A guest XIVE device > +requires a POWER9 host and the guest OS should have support for the > +XIVE native exploitation interrupt mode. If not, it should run using > +the legacy interrupt mode, referred as XICS (POWER7/8). > + > +* Groups: > + > + 1. KVM_DEV_XIVE_GRP_CTRL > + Provides global controls on the device > diff --git a/arch/powerpc/kvm/Makefile b/arch/powerpc/kvm/Makefile > index 64f1135e7732..806cbe488410 100644 > --- a/arch/powerpc/kvm/Makefile > +++ b/arch/powerpc/kvm/Makefile > @@ -99,7 +99,7 @@ endif > kvm-book3s_64-objs-$(CONFIG_KVM_XICS) +=3D \ > book3s_xics.o > =20 > -kvm-book3s_64-objs-$(CONFIG_KVM_XIVE) +=3D book3s_xive.o > +kvm-book3s_64-objs-$(CONFIG_KVM_XIVE) +=3D book3s_xive.o book3s_xive_nat= ive.o > kvm-book3s_64-objs-$(CONFIG_SPAPR_TCE_IOMMU) +=3D book3s_64_vio.o > =20 > kvm-book3s_64-module-objs :=3D \ --=20 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 --aPdhxNJGSeOG9wFI Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAEBCAAdFiEEdfRlhq5hpmzETofcbDjKyiDZs5IFAlxzMg0ACgkQbDjKyiDZ s5LjDxAArjZ/L2QVpVvfK8yiu/GJ75oVCI2r66WRRuW+QJiAW2eSVsr5VF++LwLr eyVpB1lL4QByrOJVycJrarkOXhULntjr3E29Z4MpAwpC2TURVK5JBe1f0gC+YjDJ RFDaJOaJDRgWGyNzqLPdPOyrff52ah2CEtw7vJSIjMWV7iqJ4ntV6AfdC+L8F64H qbMd2ziVlw57vaWmj0BDuQvX1gN2ECayz22DFKwT09Ay3E6lUbe/mmPM10pkGSBf lJlCCIj5P2ftjIGIIRY1uATFnvaNEj8K/ffquZ2XLeBFM5M0GlheOtsDcyklTanG 3IRmdnv7xMJWUsbeKcemD8pDlviwSqS8kaqAHEAUYSlCtSrQNulWbp3gVsEhv6DT 8luTK0ruB6GC4qdfA07t/MfBORRCkw8rTabes3vlqdH5St9KH9AkfTI+1fEqsSDI 83UVdvqsPatmueN7r3TbbAX4BTkdd2KRlvQeaeWw1IGM6OY0jWCNFOCxE74c3KUs 8GdKNkvdJcCCJEGoe8ipx0WOWUd4mtrky65q5vPr/fJrBupfSGkD68+JaU9TvFKU Bng9sKdOKWpN4sVSWWHkxIbRaAm5j7DjaIVWt1myMSRAwavhinDfO/OCTxr2tG3A UIqC3sQS9Fx9uPrnRH43wJSdcQ0fFXabd9VXXNPDl73xOfLjWfk= =49dK -----END PGP SIGNATURE----- --aPdhxNJGSeOG9wFI-- From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Gibson Date: Mon, 25 Feb 2019 00:08:48 +0000 Subject: Re: [PATCH v2 02/16] KVM: PPC: Book3S HV: add a new KVM device for the XIVE native exploitation mode Message-Id: <20190225000848.GF7668@umbus.fritz.box> MIME-Version: 1 Content-Type: multipart/mixed; boundary="aPdhxNJGSeOG9wFI" List-Id: References: <20190222112840.25000-1-clg@kaod.org> <20190222112840.25000-3-clg@kaod.org> In-Reply-To: <20190222112840.25000-3-clg@kaod.org> To: =?iso-8859-1?Q?C=E9dric?= Le Goater Cc: kvm@vger.kernel.org, kvm-ppc@vger.kernel.org, Paul Mackerras , linuxppc-dev@lists.ozlabs.org --aPdhxNJGSeOG9wFI Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Fri, Feb 22, 2019 at 12:28:26PM +0100, C=E9dric Le Goater wrote: > This is the basic framework for the new KVM device supporting the XIVE > native exploitation mode. The user interface exposes a new KVM device > to be created by QEMU when running on a L0 hypervisor only. Support > for nested guests is not available yet. >=20 > Signed-off-by: C=E9dric Le Goater > --- > arch/powerpc/include/asm/kvm_host.h | 1 + > arch/powerpc/include/asm/kvm_ppc.h | 8 + > arch/powerpc/include/uapi/asm/kvm.h | 3 + > include/uapi/linux/kvm.h | 2 + > arch/powerpc/kvm/book3s.c | 7 +- > arch/powerpc/kvm/book3s_xive_native.c | 191 +++++++++++++++++++++ > Documentation/virtual/kvm/devices/xive.txt | 19 ++ > arch/powerpc/kvm/Makefile | 2 +- > 8 files changed, 231 insertions(+), 2 deletions(-) > create mode 100644 arch/powerpc/kvm/book3s_xive_native.c > create mode 100644 Documentation/virtual/kvm/devices/xive.txt >=20 > diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/a= sm/kvm_host.h > index 091430339db1..9f75a75a07f2 100644 > --- a/arch/powerpc/include/asm/kvm_host.h > +++ b/arch/powerpc/include/asm/kvm_host.h > @@ -220,6 +220,7 @@ extern struct kvm_device_ops kvm_xics_ops; > struct kvmppc_xive; > struct kvmppc_xive_vcpu; > extern struct kvm_device_ops kvm_xive_ops; > +extern struct kvm_device_ops kvm_xive_native_ops; > =20 > struct kvmppc_passthru_irqmap; > =20 > diff --git a/arch/powerpc/include/asm/kvm_ppc.h b/arch/powerpc/include/as= m/kvm_ppc.h > index b3bf4f61b30c..4b72ddde7dc1 100644 > --- a/arch/powerpc/include/asm/kvm_ppc.h > +++ b/arch/powerpc/include/asm/kvm_ppc.h > @@ -593,6 +593,10 @@ extern int kvmppc_xive_set_icp(struct kvm_vcpu *vcpu= , u64 icpval); > extern int kvmppc_xive_set_irq(struct kvm *kvm, int irq_source_id, u32 i= rq, > int level, bool line_status); > extern void kvmppc_xive_push_vcpu(struct kvm_vcpu *vcpu); > + > +extern void kvmppc_xive_native_init_module(void); > +extern void kvmppc_xive_native_exit_module(void); > + > #else > static inline int kvmppc_xive_set_xive(struct kvm *kvm, u32 irq, u32 ser= ver, > u32 priority) { return -1; } > @@ -616,6 +620,10 @@ static inline int kvmppc_xive_set_icp(struct kvm_vcp= u *vcpu, u64 icpval) { retur > static inline int kvmppc_xive_set_irq(struct kvm *kvm, int irq_source_id= , u32 irq, > int level, bool line_status) { return -ENODEV; } > static inline void kvmppc_xive_push_vcpu(struct kvm_vcpu *vcpu) { } > + > +static inline void kvmppc_xive_native_init_module(void) { } > +static inline void kvmppc_xive_native_exit_module(void) { } > + > #endif /* CONFIG_KVM_XIVE */ > =20 > #ifdef CONFIG_PPC_POWERNV > diff --git a/arch/powerpc/include/uapi/asm/kvm.h b/arch/powerpc/include/u= api/asm/kvm.h > index 8c876c166ef2..b002c0c67787 100644 > --- a/arch/powerpc/include/uapi/asm/kvm.h > +++ b/arch/powerpc/include/uapi/asm/kvm.h > @@ -675,4 +675,7 @@ struct kvm_ppc_cpu_char { > #define KVM_XICS_PRESENTED (1ULL << 43) > #define KVM_XICS_QUEUED (1ULL << 44) > =20 > +/* POWER9 XIVE Native Interrupt Controller */ > +#define KVM_DEV_XIVE_GRP_CTRL 1 > + > #endif /* __LINUX_KVM_POWERPC_H */ > diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h > index 6d4ea4b6c922..e6368163d3a0 100644 > --- a/include/uapi/linux/kvm.h > +++ b/include/uapi/linux/kvm.h > @@ -1211,6 +1211,8 @@ enum kvm_device_type { > #define KVM_DEV_TYPE_ARM_VGIC_V3 KVM_DEV_TYPE_ARM_VGIC_V3 > KVM_DEV_TYPE_ARM_VGIC_ITS, > #define KVM_DEV_TYPE_ARM_VGIC_ITS KVM_DEV_TYPE_ARM_VGIC_ITS > + KVM_DEV_TYPE_XIVE, > +#define KVM_DEV_TYPE_XIVE KVM_DEV_TYPE_XIVE > KVM_DEV_TYPE_MAX, > }; > =20 > diff --git a/arch/powerpc/kvm/book3s.c b/arch/powerpc/kvm/book3s.c > index 601c094f15ab..96d43f091255 100644 > --- a/arch/powerpc/kvm/book3s.c > +++ b/arch/powerpc/kvm/book3s.c > @@ -1040,6 +1040,9 @@ static int kvmppc_book3s_init(void) > if (xics_on_xive()) { > kvmppc_xive_init_module(); > kvm_register_device_ops(&kvm_xive_ops, KVM_DEV_TYPE_XICS); > + kvmppc_xive_native_init_module(); > + kvm_register_device_ops(&kvm_xive_native_ops, > + KVM_DEV_TYPE_XIVE); > } else > #endif > kvm_register_device_ops(&kvm_xics_ops, KVM_DEV_TYPE_XICS); > @@ -1050,8 +1053,10 @@ static int kvmppc_book3s_init(void) > static void kvmppc_book3s_exit(void) > { > #ifdef CONFIG_KVM_XICS > - if (xics_on_xive()) > + if (xics_on_xive()) { > kvmppc_xive_exit_module(); > + kvmppc_xive_native_exit_module(); > + } > #endif > #ifdef CONFIG_KVM_BOOK3S_32_HANDLER > kvmppc_book3s_exit_pr(); > diff --git a/arch/powerpc/kvm/book3s_xive_native.c b/arch/powerpc/kvm/boo= k3s_xive_native.c > new file mode 100644 > index 000000000000..e475ce83ad14 > --- /dev/null > +++ b/arch/powerpc/kvm/book3s_xive_native.c > @@ -0,0 +1,191 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* > + * Copyright (c) 2017-2019, IBM Corporation. > + */ > + > +#define pr_fmt(fmt) "xive-kvm: " fmt > + > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > + > +#include > +#include > + > +#include "book3s_xive.h" > + > +static int kvmppc_xive_native_set_attr(struct kvm_device *dev, > + struct kvm_device_attr *attr) > +{ > + switch (attr->group) { > + case KVM_DEV_XIVE_GRP_CTRL: > + break; > + } > + return -ENXIO; > +} > + > +static int kvmppc_xive_native_get_attr(struct kvm_device *dev, > + struct kvm_device_attr *attr) > +{ > + return -ENXIO; > +} > + > +static int kvmppc_xive_native_has_attr(struct kvm_device *dev, > + struct kvm_device_attr *attr) > +{ > + switch (attr->group) { > + case KVM_DEV_XIVE_GRP_CTRL: > + break; > + } > + return -ENXIO; > +} > + > +static void kvmppc_xive_native_free(struct kvm_device *dev) > +{ > + struct kvmppc_xive *xive =3D dev->private; > + struct kvm *kvm =3D xive->kvm; > + > + debugfs_remove(xive->dentry); > + > + pr_devel("Destroying xive native device\n"); > + > + if (kvm) > + kvm->arch.xive =3D NULL; > + > + if (xive->vp_base !=3D XIVE_INVALID_VP) > + xive_native_free_vp_block(xive->vp_base); > + > + kfree(xive); > + kfree(dev); > +} > + > +static int kvmppc_xive_native_create(struct kvm_device *dev, u32 type) > +{ > + struct kvmppc_xive *xive; > + struct kvm *kvm =3D dev->kvm; > + int ret =3D 0; > + > + pr_devel("Creating xive native device\n"); > + > + if (kvm->arch.xive) > + return -EEXIST; > + > + xive =3D kzalloc(sizeof(*xive), GFP_KERNEL); > + if (!xive) > + return -ENOMEM; > + > + dev->private =3D xive; > + xive->dev =3D dev; > + xive->kvm =3D kvm; > + kvm->arch.xive =3D xive; > + > + /* We use the default queue size set by the host */ IIUC the queue is examined directly by the guest, so the guest must know its size. In which case letting the host decide the size would be a problem for migration. > + xive->q_order =3D xive_native_default_eq_shift(); > + if (xive->q_order < PAGE_SHIFT) > + xive->q_page_order =3D 0; > + else > + xive->q_page_order =3D xive->q_order - PAGE_SHIFT; > + > + /* > + * Allocate a bunch of VPs. KVM_MAX_VCPUS is a large value for > + * a default. Getting the max number of CPUs the VM was > + * configured with would improve our usage of the XIVE VP space. > + */ > + xive->vp_base =3D xive_native_alloc_vp_block(KVM_MAX_VCPUS); > + pr_devel("VP_Base=3D%x\n", xive->vp_base); > + > + if (xive->vp_base =3D=3D XIVE_INVALID_VP) > + ret =3D -ENOMEM; > + > + xive->single_escalation =3D xive_native_has_single_escalation(); > + > + if (ret) > + kfree(xive); > + > + return ret; > +} > + > +static int xive_native_debug_show(struct seq_file *m, void *private) > +{ > + struct kvmppc_xive *xive =3D m->private; > + struct kvm *kvm =3D xive->kvm; > + > + if (!kvm) > + return 0; > + > + return 0; > +} > + > +static int xive_native_debug_open(struct inode *inode, struct file *file) > +{ > + return single_open(file, xive_native_debug_show, inode->i_private); > +} > + > +static const struct file_operations xive_native_debug_fops =3D { > + .open =3D xive_native_debug_open, > + .read =3D seq_read, > + .llseek =3D seq_lseek, > + .release =3D single_release, > +}; > + > +static void xive_native_debugfs_init(struct kvmppc_xive *xive) > +{ > + char *name; > + > + name =3D kasprintf(GFP_KERNEL, "kvm-xive-%p", xive); > + if (!name) { > + pr_err("%s: no memory for name\n", __func__); > + return; > + } > + > + xive->dentry =3D debugfs_create_file(name, 0444, powerpc_debugfs_root, > + xive, &xive_native_debug_fops); > + > + pr_debug("%s: created %s\n", __func__, name); > + kfree(name); > +} > + > +static void kvmppc_xive_native_init(struct kvm_device *dev) > +{ > + struct kvmppc_xive *xive =3D (struct kvmppc_xive *)dev->private; > + > + /* Register some debug interfaces */ > + xive_native_debugfs_init(xive); > +} > + > +struct kvm_device_ops kvm_xive_native_ops =3D { > + .name =3D "kvm-xive-native", > + .create =3D kvmppc_xive_native_create, > + .init =3D kvmppc_xive_native_init, > + .destroy =3D kvmppc_xive_native_free, > + .set_attr =3D kvmppc_xive_native_set_attr, > + .get_attr =3D kvmppc_xive_native_get_attr, > + .has_attr =3D kvmppc_xive_native_has_attr, > +}; > + > +void kvmppc_xive_native_init_module(void) > +{ > + ; > +} > + > +void kvmppc_xive_native_exit_module(void) > +{ > + ; > +} > diff --git a/Documentation/virtual/kvm/devices/xive.txt b/Documentation/v= irtual/kvm/devices/xive.txt > new file mode 100644 > index 000000000000..fdbd2ff92a88 > --- /dev/null > +++ b/Documentation/virtual/kvm/devices/xive.txt > @@ -0,0 +1,19 @@ > +POWER9 eXternal Interrupt Virtualization Engine (XIVE Gen1) > +=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D > + > +Device types supported: > + KVM_DEV_TYPE_XIVE POWER9 XIVE Interrupt Controller generation 1 > + > +This device acts as a VM interrupt controller. It provides the KVM > +interface to configure the interrupt sources of a VM in the underlying > +POWER9 XIVE interrupt controller. > + > +Only one XIVE instance may be instantiated. A guest XIVE device > +requires a POWER9 host and the guest OS should have support for the > +XIVE native exploitation interrupt mode. If not, it should run using > +the legacy interrupt mode, referred as XICS (POWER7/8). > + > +* Groups: > + > + 1. KVM_DEV_XIVE_GRP_CTRL > + Provides global controls on the device > diff --git a/arch/powerpc/kvm/Makefile b/arch/powerpc/kvm/Makefile > index 64f1135e7732..806cbe488410 100644 > --- a/arch/powerpc/kvm/Makefile > +++ b/arch/powerpc/kvm/Makefile > @@ -99,7 +99,7 @@ endif > kvm-book3s_64-objs-$(CONFIG_KVM_XICS) +=3D \ > book3s_xics.o > =20 > -kvm-book3s_64-objs-$(CONFIG_KVM_XIVE) +=3D book3s_xive.o > +kvm-book3s_64-objs-$(CONFIG_KVM_XIVE) +=3D book3s_xive.o book3s_xive_nat= ive.o > kvm-book3s_64-objs-$(CONFIG_SPAPR_TCE_IOMMU) +=3D book3s_64_vio.o > =20 > kvm-book3s_64-module-objs :=3D \ --=20 David Gibson | I'll have my music baroque, and my code david AT gibson.dropbear.id.au | minimalist, thank you. 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