| Message ID | 20210901211412.4171835-11-rananta@google.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | KVM: arm64: selftests: Introduce arch_timer selftest | expand |
On Wed, Sep 01, 2021 at 09:14:10PM +0000, Raghavendra Rao Ananta wrote: > Implement a simple library to do perform vGIC-v3 > setup from a host of view. This includes creating > a vGIC device, setting up distributor and redistributor > attributes, and mapping the guest physical addresses. > > Signed-off-by: Raghavendra Rao Ananta <rananta@google.com> > > --- > tools/testing/selftests/kvm/Makefile | 2 +- > .../selftests/kvm/include/aarch64/vgic.h | 14 ++++ > .../testing/selftests/kvm/lib/aarch64/vgic.c | 67 +++++++++++++++++++ > 3 files changed, 82 insertions(+), 1 deletion(-) > create mode 100644 tools/testing/selftests/kvm/include/aarch64/vgic.h > create mode 100644 tools/testing/selftests/kvm/lib/aarch64/vgic.c > > diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile > index 5476a8ddef60..8342f65c1d96 100644 > --- a/tools/testing/selftests/kvm/Makefile > +++ b/tools/testing/selftests/kvm/Makefile > @@ -35,7 +35,7 @@ endif > > LIBKVM = lib/assert.c lib/elf.c lib/io.c lib/kvm_util.c lib/rbtree.c lib/sparsebit.c lib/test_util.c lib/guest_modes.c lib/perf_test_util.c > LIBKVM_x86_64 = lib/x86_64/apic.c lib/x86_64/processor.c lib/x86_64/vmx.c lib/x86_64/svm.c lib/x86_64/ucall.c lib/x86_64/handlers.S > -LIBKVM_aarch64 = lib/aarch64/processor.c lib/aarch64/ucall.c lib/aarch64/handlers.S lib/aarch64/spinlock.c lib/aarch64/gic.c lib/aarch64/gic_v3.c > +LIBKVM_aarch64 = lib/aarch64/processor.c lib/aarch64/ucall.c lib/aarch64/handlers.S lib/aarch64/spinlock.c lib/aarch64/gic.c lib/aarch64/gic_v3.c lib/aarch64/vgic.c > LIBKVM_s390x = lib/s390x/processor.c lib/s390x/ucall.c lib/s390x/diag318_test_handler.c > > TEST_GEN_PROGS_x86_64 = x86_64/cr4_cpuid_sync_test > diff --git a/tools/testing/selftests/kvm/include/aarch64/vgic.h b/tools/testing/selftests/kvm/include/aarch64/vgic.h > new file mode 100644 > index 000000000000..45bbf238147a > --- /dev/null > +++ b/tools/testing/selftests/kvm/include/aarch64/vgic.h > @@ -0,0 +1,14 @@ > +/* SPDX-License-Identifier: GPL-2.0 */ > +/* > + * ARM Generic Interrupt Controller (GIC) host specific defines > + */ > + > +#ifndef SELFTEST_KVM_VGIC_H > +#define SELFTEST_KVM_VGIC_H > + > +#include <linux/kvm.h> > + > +int vgic_v3_setup(struct kvm_vm *vm, unsigned int nr_vcpus, > + uint64_t gicd_base_gpa, uint64_t gicr_base_gpa, uint32_t slot); > + > +#endif /* SELFTEST_KVM_VGIC_H */ > diff --git a/tools/testing/selftests/kvm/lib/aarch64/vgic.c b/tools/testing/selftests/kvm/lib/aarch64/vgic.c > new file mode 100644 > index 000000000000..a0e4b986d335 > --- /dev/null > +++ b/tools/testing/selftests/kvm/lib/aarch64/vgic.c > @@ -0,0 +1,67 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* > + * ARM Generic Interrupt Controller (GIC) v3 host support > + */ > + > +#include <linux/kvm.h> > +#include <linux/sizes.h> > + > +#include "kvm_util.h" > + > +#define VGIC_V3_GICD_SZ (SZ_64K) > +#define VGIC_V3_GICR_SZ (2 * SZ_64K) > + > +#define REDIST_REGION_ATTR_ADDR(count, base, flags, index) \ > + (((uint64_t)(count) << 52) | \ > + ((uint64_t)((base) >> 16) << 16) | \ > + ((uint64_t)(flags) << 12) | \ > + index) > + > +static void vgic_v3_map(struct kvm_vm *vm, uint64_t addr, unsigned int size) > +{ > + unsigned int n_pages = DIV_ROUND_UP(size, vm_get_page_size(vm)); > + > + virt_map(vm, addr, addr, n_pages); > +} > + > +/* > + * vGIC-v3 default host setup > + * > + * Input args: > + * vm - KVM VM > + * nr_vcpus - Number of vCPUs for this VM > + * gicd_base_gpa - Guest Physical Address of the Distributor region > + * gicr_base_gpa - Guest Physical Address of the Redistributor region > + * > + * Output args: None > + * > + * Return: GIC file-descriptor or negative error code upon failure > + * > + * The function creates a vGIC-v3 device and maps the distributor and > + * redistributor regions of the guest. > + */ > +int vgic_v3_setup(struct kvm_vm *vm, unsigned int nr_vcpus, > + uint64_t gicd_base_gpa, uint64_t gicr_base_gpa) > +{ > + uint64_t redist_attr; > + int gic_fd; > + > + TEST_ASSERT(nr_vcpus <= KVM_MAX_VCPUS, > + "Invalid number of CPUs: %u\n", nr_vcpus); > + > + gic_fd = kvm_create_device(vm, KVM_DEV_TYPE_ARM_VGIC_V3, false); Nit: you can return early if gic_fd is bad. > + > + kvm_device_access(gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR, > + KVM_VGIC_V3_ADDR_TYPE_DIST, &gicd_base_gpa, true); > + vgic_v3_map(vm, gicd_base_gpa, VGIC_V3_GICD_SZ); vgic_v3_map() implies that it's doing something vgic specific, when it's just converting bytes to pages. What about something like the following? virt_map(vm, addr, addr, VM_BYTES_TO_PAGES(vm, VGIC_V3_GICD_SZ)); and you add a VM_BYTES_TO_PAGES macro to include/kvm_util.h? I think this macro can be useful to others. > + > + redist_attr = REDIST_REGION_ATTR_ADDR(nr_vcpus, gicr_base_gpa, 0, 0); > + kvm_device_access(gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR, > + KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &redist_attr, true); > + vgic_v3_map(vm, gicr_base_gpa, VGIC_V3_GICR_SZ * nr_vcpus); > + > + kvm_device_access(gic_fd, KVM_DEV_ARM_VGIC_GRP_CTRL, > + KVM_DEV_ARM_VGIC_CTRL_INIT, NULL, true); > + > + return gic_fd; > +} > -- > 2.33.0.153.gba50c8fa24-goog >
On Thu, Sep 2, 2021 at 10:28 AM Ricardo Koller <ricarkol@google.com> wrote: > > On Wed, Sep 01, 2021 at 09:14:10PM +0000, Raghavendra Rao Ananta wrote: > > Implement a simple library to do perform vGIC-v3 > > setup from a host of view. This includes creating > > a vGIC device, setting up distributor and redistributor > > attributes, and mapping the guest physical addresses. > > > > Signed-off-by: Raghavendra Rao Ananta <rananta@google.com> > > > > --- > > tools/testing/selftests/kvm/Makefile | 2 +- > > .../selftests/kvm/include/aarch64/vgic.h | 14 ++++ > > .../testing/selftests/kvm/lib/aarch64/vgic.c | 67 +++++++++++++++++++ > > 3 files changed, 82 insertions(+), 1 deletion(-) > > create mode 100644 tools/testing/selftests/kvm/include/aarch64/vgic.h > > create mode 100644 tools/testing/selftests/kvm/lib/aarch64/vgic.c > > > > diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile > > index 5476a8ddef60..8342f65c1d96 100644 > > --- a/tools/testing/selftests/kvm/Makefile > > +++ b/tools/testing/selftests/kvm/Makefile > > @@ -35,7 +35,7 @@ endif > > > > LIBKVM = lib/assert.c lib/elf.c lib/io.c lib/kvm_util.c lib/rbtree.c lib/sparsebit.c lib/test_util.c lib/guest_modes.c lib/perf_test_util.c > > LIBKVM_x86_64 = lib/x86_64/apic.c lib/x86_64/processor.c lib/x86_64/vmx.c lib/x86_64/svm.c lib/x86_64/ucall.c lib/x86_64/handlers.S > > -LIBKVM_aarch64 = lib/aarch64/processor.c lib/aarch64/ucall.c lib/aarch64/handlers.S lib/aarch64/spinlock.c lib/aarch64/gic.c lib/aarch64/gic_v3.c > > +LIBKVM_aarch64 = lib/aarch64/processor.c lib/aarch64/ucall.c lib/aarch64/handlers.S lib/aarch64/spinlock.c lib/aarch64/gic.c lib/aarch64/gic_v3.c lib/aarch64/vgic.c > > LIBKVM_s390x = lib/s390x/processor.c lib/s390x/ucall.c lib/s390x/diag318_test_handler.c > > > > TEST_GEN_PROGS_x86_64 = x86_64/cr4_cpuid_sync_test > > diff --git a/tools/testing/selftests/kvm/include/aarch64/vgic.h b/tools/testing/selftests/kvm/include/aarch64/vgic.h > > new file mode 100644 > > index 000000000000..45bbf238147a > > --- /dev/null > > +++ b/tools/testing/selftests/kvm/include/aarch64/vgic.h > > @@ -0,0 +1,14 @@ > > +/* SPDX-License-Identifier: GPL-2.0 */ > > +/* > > + * ARM Generic Interrupt Controller (GIC) host specific defines > > + */ > > + > > +#ifndef SELFTEST_KVM_VGIC_H > > +#define SELFTEST_KVM_VGIC_H > > + > > +#include <linux/kvm.h> > > + > > +int vgic_v3_setup(struct kvm_vm *vm, unsigned int nr_vcpus, > > + uint64_t gicd_base_gpa, uint64_t gicr_base_gpa, uint32_t slot); > > + > > +#endif /* SELFTEST_KVM_VGIC_H */ > > diff --git a/tools/testing/selftests/kvm/lib/aarch64/vgic.c b/tools/testing/selftests/kvm/lib/aarch64/vgic.c > > new file mode 100644 > > index 000000000000..a0e4b986d335 > > --- /dev/null > > +++ b/tools/testing/selftests/kvm/lib/aarch64/vgic.c > > @@ -0,0 +1,67 @@ > > +// SPDX-License-Identifier: GPL-2.0 > > +/* > > + * ARM Generic Interrupt Controller (GIC) v3 host support > > + */ > > + > > +#include <linux/kvm.h> > > +#include <linux/sizes.h> > > + > > +#include "kvm_util.h" > > + > > +#define VGIC_V3_GICD_SZ (SZ_64K) > > +#define VGIC_V3_GICR_SZ (2 * SZ_64K) > > + > > +#define REDIST_REGION_ATTR_ADDR(count, base, flags, index) \ > > + (((uint64_t)(count) << 52) | \ > > + ((uint64_t)((base) >> 16) << 16) | \ > > + ((uint64_t)(flags) << 12) | \ > > + index) > > + > > +static void vgic_v3_map(struct kvm_vm *vm, uint64_t addr, unsigned int size) > > +{ > > + unsigned int n_pages = DIV_ROUND_UP(size, vm_get_page_size(vm)); > > + > > + virt_map(vm, addr, addr, n_pages); > > +} > > + > > +/* > > + * vGIC-v3 default host setup > > + * > > + * Input args: > > + * vm - KVM VM > > + * nr_vcpus - Number of vCPUs for this VM > > + * gicd_base_gpa - Guest Physical Address of the Distributor region > > + * gicr_base_gpa - Guest Physical Address of the Redistributor region > > + * > > + * Output args: None > > + * > > + * Return: GIC file-descriptor or negative error code upon failure > > + * > > + * The function creates a vGIC-v3 device and maps the distributor and > > + * redistributor regions of the guest. > > + */ > > +int vgic_v3_setup(struct kvm_vm *vm, unsigned int nr_vcpus, > > + uint64_t gicd_base_gpa, uint64_t gicr_base_gpa) > > +{ > > + uint64_t redist_attr; > > + int gic_fd; > > + > > + TEST_ASSERT(nr_vcpus <= KVM_MAX_VCPUS, > > + "Invalid number of CPUs: %u\n", nr_vcpus); > > + > > + gic_fd = kvm_create_device(vm, KVM_DEV_TYPE_ARM_VGIC_V3, false); > > Nit: you can return early if gic_fd is bad. > kvm_create_device() already takes care of this and the test would simply fail if gic_fd was bad. So, I think we can positively move on :) > > + > > + kvm_device_access(gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR, > > + KVM_VGIC_V3_ADDR_TYPE_DIST, &gicd_base_gpa, true); > > + vgic_v3_map(vm, gicd_base_gpa, VGIC_V3_GICD_SZ); > > vgic_v3_map() implies that it's doing something vgic specific, when it's > just converting bytes to pages. What about something like the following? > > virt_map(vm, addr, addr, VM_BYTES_TO_PAGES(vm, VGIC_V3_GICD_SZ)); > > and you add a VM_BYTES_TO_PAGES macro to include/kvm_util.h? I think > this macro can be useful to others. > Yeah, good idea. Will do. Regards, Raghavendra > > + > > + redist_attr = REDIST_REGION_ATTR_ADDR(nr_vcpus, gicr_base_gpa, 0, 0); > > + kvm_device_access(gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR, > > + KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &redist_attr, true); > > + vgic_v3_map(vm, gicr_base_gpa, VGIC_V3_GICR_SZ * nr_vcpus); > > + > > + kvm_device_access(gic_fd, KVM_DEV_ARM_VGIC_GRP_CTRL, > > + KVM_DEV_ARM_VGIC_CTRL_INIT, NULL, true); > > + > > + return gic_fd; > > +} > > -- > > 2.33.0.153.gba50c8fa24-goog > >
On Wed, Sep 01, 2021 at 09:14:10PM +0000, Raghavendra Rao Ananta wrote: > Implement a simple library to do perform vGIC-v3 s/do// > setup from a host of view. ^ point > This includes creating > a vGIC device, setting up distributor and redistributor > attributes, and mapping the guest physical addresses. > > Signed-off-by: Raghavendra Rao Ananta <rananta@google.com> > > --- > tools/testing/selftests/kvm/Makefile | 2 +- > .../selftests/kvm/include/aarch64/vgic.h | 14 ++++ > .../testing/selftests/kvm/lib/aarch64/vgic.c | 67 +++++++++++++++++++ > 3 files changed, 82 insertions(+), 1 deletion(-) > create mode 100644 tools/testing/selftests/kvm/include/aarch64/vgic.h > create mode 100644 tools/testing/selftests/kvm/lib/aarch64/vgic.c > > diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile > index 5476a8ddef60..8342f65c1d96 100644 > --- a/tools/testing/selftests/kvm/Makefile > +++ b/tools/testing/selftests/kvm/Makefile > @@ -35,7 +35,7 @@ endif > > LIBKVM = lib/assert.c lib/elf.c lib/io.c lib/kvm_util.c lib/rbtree.c lib/sparsebit.c lib/test_util.c lib/guest_modes.c lib/perf_test_util.c > LIBKVM_x86_64 = lib/x86_64/apic.c lib/x86_64/processor.c lib/x86_64/vmx.c lib/x86_64/svm.c lib/x86_64/ucall.c lib/x86_64/handlers.S > -LIBKVM_aarch64 = lib/aarch64/processor.c lib/aarch64/ucall.c lib/aarch64/handlers.S lib/aarch64/spinlock.c lib/aarch64/gic.c lib/aarch64/gic_v3.c > +LIBKVM_aarch64 = lib/aarch64/processor.c lib/aarch64/ucall.c lib/aarch64/handlers.S lib/aarch64/spinlock.c lib/aarch64/gic.c lib/aarch64/gic_v3.c lib/aarch64/vgic.c > LIBKVM_s390x = lib/s390x/processor.c lib/s390x/ucall.c lib/s390x/diag318_test_handler.c > > TEST_GEN_PROGS_x86_64 = x86_64/cr4_cpuid_sync_test > diff --git a/tools/testing/selftests/kvm/include/aarch64/vgic.h b/tools/testing/selftests/kvm/include/aarch64/vgic.h > new file mode 100644 > index 000000000000..45bbf238147a > --- /dev/null > +++ b/tools/testing/selftests/kvm/include/aarch64/vgic.h > @@ -0,0 +1,14 @@ > +/* SPDX-License-Identifier: GPL-2.0 */ > +/* > + * ARM Generic Interrupt Controller (GIC) host specific defines > + */ > + > +#ifndef SELFTEST_KVM_VGIC_H > +#define SELFTEST_KVM_VGIC_H > + > +#include <linux/kvm.h> > + > +int vgic_v3_setup(struct kvm_vm *vm, unsigned int nr_vcpus, > + uint64_t gicd_base_gpa, uint64_t gicr_base_gpa, uint32_t slot); > + > +#endif /* SELFTEST_KVM_VGIC_H */ > diff --git a/tools/testing/selftests/kvm/lib/aarch64/vgic.c b/tools/testing/selftests/kvm/lib/aarch64/vgic.c > new file mode 100644 > index 000000000000..a0e4b986d335 > --- /dev/null > +++ b/tools/testing/selftests/kvm/lib/aarch64/vgic.c > @@ -0,0 +1,67 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* > + * ARM Generic Interrupt Controller (GIC) v3 host support > + */ > + > +#include <linux/kvm.h> > +#include <linux/sizes.h> > + > +#include "kvm_util.h" > + > +#define VGIC_V3_GICD_SZ (SZ_64K) > +#define VGIC_V3_GICR_SZ (2 * SZ_64K) > + > +#define REDIST_REGION_ATTR_ADDR(count, base, flags, index) \ > + (((uint64_t)(count) << 52) | \ > + ((uint64_t)((base) >> 16) << 16) | \ > + ((uint64_t)(flags) << 12) | \ > + index) This could go in vgic.h allowing us to share it in aarch64/vgic_init.c, where we already have the same definition. > + > +static void vgic_v3_map(struct kvm_vm *vm, uint64_t addr, unsigned int size) > +{ > + unsigned int n_pages = DIV_ROUND_UP(size, vm_get_page_size(vm)); > + > + virt_map(vm, addr, addr, n_pages); > +} > + > +/* > + * vGIC-v3 default host setup > + * > + * Input args: > + * vm - KVM VM > + * nr_vcpus - Number of vCPUs for this VM > + * gicd_base_gpa - Guest Physical Address of the Distributor region > + * gicr_base_gpa - Guest Physical Address of the Redistributor region > + * > + * Output args: None > + * > + * Return: GIC file-descriptor or negative error code upon failure > + * > + * The function creates a vGIC-v3 device and maps the distributor and > + * redistributor regions of the guest. > + */ > +int vgic_v3_setup(struct kvm_vm *vm, unsigned int nr_vcpus, > + uint64_t gicd_base_gpa, uint64_t gicr_base_gpa) > +{ > + uint64_t redist_attr; > + int gic_fd; > + > + TEST_ASSERT(nr_vcpus <= KVM_MAX_VCPUS, > + "Invalid number of CPUs: %u\n", nr_vcpus); TEST_ASSERT(!list_empty(&vm->vcpus), ...) to ensure we've created vcpus first. To be really paranoid we could even confirm the number of vcpus in the list matches nr_vcpus. > + > + gic_fd = kvm_create_device(vm, KVM_DEV_TYPE_ARM_VGIC_V3, false); > + > + kvm_device_access(gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR, > + KVM_VGIC_V3_ADDR_TYPE_DIST, &gicd_base_gpa, true); > + vgic_v3_map(vm, gicd_base_gpa, VGIC_V3_GICD_SZ); > + > + redist_attr = REDIST_REGION_ATTR_ADDR(nr_vcpus, gicr_base_gpa, 0, 0); > + kvm_device_access(gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR, > + KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &redist_attr, true); > + vgic_v3_map(vm, gicr_base_gpa, VGIC_V3_GICR_SZ * nr_vcpus); > + > + kvm_device_access(gic_fd, KVM_DEV_ARM_VGIC_GRP_CTRL, > + KVM_DEV_ARM_VGIC_CTRL_INIT, NULL, true); > + > + return gic_fd; > +} > -- > 2.33.0.153.gba50c8fa24-goog Otherwise Reviewed-by: Andrew Jones <drjones@redhat.com> Thanks, drew
On Wed, Sep 01, 2021 at 09:14:10PM +0000, Raghavendra Rao Ananta wrote: > Implement a simple library to do perform vGIC-v3 > setup from a host of view. This includes creating > a vGIC device, setting up distributor and redistributor > attributes, and mapping the guest physical addresses. > > Signed-off-by: Raghavendra Rao Ananta <rananta@google.com> > > --- > tools/testing/selftests/kvm/Makefile | 2 +- > .../selftests/kvm/include/aarch64/vgic.h | 14 ++++ > .../testing/selftests/kvm/lib/aarch64/vgic.c | 67 +++++++++++++++++++ > 3 files changed, 82 insertions(+), 1 deletion(-) > create mode 100644 tools/testing/selftests/kvm/include/aarch64/vgic.h > create mode 100644 tools/testing/selftests/kvm/lib/aarch64/vgic.c > > diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile > index 5476a8ddef60..8342f65c1d96 100644 > --- a/tools/testing/selftests/kvm/Makefile > +++ b/tools/testing/selftests/kvm/Makefile > @@ -35,7 +35,7 @@ endif > > LIBKVM = lib/assert.c lib/elf.c lib/io.c lib/kvm_util.c lib/rbtree.c lib/sparsebit.c lib/test_util.c lib/guest_modes.c lib/perf_test_util.c > LIBKVM_x86_64 = lib/x86_64/apic.c lib/x86_64/processor.c lib/x86_64/vmx.c lib/x86_64/svm.c lib/x86_64/ucall.c lib/x86_64/handlers.S > -LIBKVM_aarch64 = lib/aarch64/processor.c lib/aarch64/ucall.c lib/aarch64/handlers.S lib/aarch64/spinlock.c lib/aarch64/gic.c lib/aarch64/gic_v3.c > +LIBKVM_aarch64 = lib/aarch64/processor.c lib/aarch64/ucall.c lib/aarch64/handlers.S lib/aarch64/spinlock.c lib/aarch64/gic.c lib/aarch64/gic_v3.c lib/aarch64/vgic.c > LIBKVM_s390x = lib/s390x/processor.c lib/s390x/ucall.c lib/s390x/diag318_test_handler.c > > TEST_GEN_PROGS_x86_64 = x86_64/cr4_cpuid_sync_test > diff --git a/tools/testing/selftests/kvm/include/aarch64/vgic.h b/tools/testing/selftests/kvm/include/aarch64/vgic.h > new file mode 100644 > index 000000000000..45bbf238147a > --- /dev/null > +++ b/tools/testing/selftests/kvm/include/aarch64/vgic.h > @@ -0,0 +1,14 @@ > +/* SPDX-License-Identifier: GPL-2.0 */ > +/* > + * ARM Generic Interrupt Controller (GIC) host specific defines > + */ > + > +#ifndef SELFTEST_KVM_VGIC_H > +#define SELFTEST_KVM_VGIC_H > + > +#include <linux/kvm.h> > + > +int vgic_v3_setup(struct kvm_vm *vm, unsigned int nr_vcpus, > + uint64_t gicd_base_gpa, uint64_t gicr_base_gpa, uint32_t slot); Having seen 5 arguments used in the vgic_v3_setup call in the next patch I came back here to refresh my memory on that parameter. 'slot' is the one I forgot, but... > + > +#endif /* SELFTEST_KVM_VGIC_H */ > diff --git a/tools/testing/selftests/kvm/lib/aarch64/vgic.c b/tools/testing/selftests/kvm/lib/aarch64/vgic.c > new file mode 100644 > index 000000000000..a0e4b986d335 > --- /dev/null > +++ b/tools/testing/selftests/kvm/lib/aarch64/vgic.c > @@ -0,0 +1,67 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* > + * ARM Generic Interrupt Controller (GIC) v3 host support > + */ > + > +#include <linux/kvm.h> > +#include <linux/sizes.h> > + > +#include "kvm_util.h" > + > +#define VGIC_V3_GICD_SZ (SZ_64K) > +#define VGIC_V3_GICR_SZ (2 * SZ_64K) > + > +#define REDIST_REGION_ATTR_ADDR(count, base, flags, index) \ > + (((uint64_t)(count) << 52) | \ > + ((uint64_t)((base) >> 16) << 16) | \ > + ((uint64_t)(flags) << 12) | \ > + index) > + > +static void vgic_v3_map(struct kvm_vm *vm, uint64_t addr, unsigned int size) > +{ > + unsigned int n_pages = DIV_ROUND_UP(size, vm_get_page_size(vm)); > + > + virt_map(vm, addr, addr, n_pages); > +} > + > +/* > + * vGIC-v3 default host setup > + * > + * Input args: > + * vm - KVM VM > + * nr_vcpus - Number of vCPUs for this VM > + * gicd_base_gpa - Guest Physical Address of the Distributor region > + * gicr_base_gpa - Guest Physical Address of the Redistributor region > + * > + * Output args: None > + * > + * Return: GIC file-descriptor or negative error code upon failure > + * > + * The function creates a vGIC-v3 device and maps the distributor and > + * redistributor regions of the guest. > + */ > +int vgic_v3_setup(struct kvm_vm *vm, unsigned int nr_vcpus, > + uint64_t gicd_base_gpa, uint64_t gicr_base_gpa) ...looks like it was forgotten here too. Thanks, drew > +{ > + uint64_t redist_attr; > + int gic_fd; > + > + TEST_ASSERT(nr_vcpus <= KVM_MAX_VCPUS, > + "Invalid number of CPUs: %u\n", nr_vcpus); > + > + gic_fd = kvm_create_device(vm, KVM_DEV_TYPE_ARM_VGIC_V3, false); > + > + kvm_device_access(gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR, > + KVM_VGIC_V3_ADDR_TYPE_DIST, &gicd_base_gpa, true); > + vgic_v3_map(vm, gicd_base_gpa, VGIC_V3_GICD_SZ); > + > + redist_attr = REDIST_REGION_ATTR_ADDR(nr_vcpus, gicr_base_gpa, 0, 0); > + kvm_device_access(gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR, > + KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &redist_attr, true); > + vgic_v3_map(vm, gicr_base_gpa, VGIC_V3_GICR_SZ * nr_vcpus); > + > + kvm_device_access(gic_fd, KVM_DEV_ARM_VGIC_GRP_CTRL, > + KVM_DEV_ARM_VGIC_CTRL_INIT, NULL, true); > + > + return gic_fd; > +} > -- > 2.33.0.153.gba50c8fa24-goog > > _______________________________________________ > kvmarm mailing list > kvmarm@lists.cs.columbia.edu > https://lists.cs.columbia.edu/mailman/listinfo/kvmarm >
On Fri, Sep 3, 2021 at 3:00 AM Andrew Jones <drjones@redhat.com> wrote: > > On Wed, Sep 01, 2021 at 09:14:10PM +0000, Raghavendra Rao Ananta wrote: > > Implement a simple library to do perform vGIC-v3 > > s/do// > > > setup from a host of view. > ^ point > > > This includes creating > > a vGIC device, setting up distributor and redistributor > > attributes, and mapping the guest physical addresses. > > > > Signed-off-by: Raghavendra Rao Ananta <rananta@google.com> > > > > --- > > tools/testing/selftests/kvm/Makefile | 2 +- > > .../selftests/kvm/include/aarch64/vgic.h | 14 ++++ > > .../testing/selftests/kvm/lib/aarch64/vgic.c | 67 +++++++++++++++++++ > > 3 files changed, 82 insertions(+), 1 deletion(-) > > create mode 100644 tools/testing/selftests/kvm/include/aarch64/vgic.h > > create mode 100644 tools/testing/selftests/kvm/lib/aarch64/vgic.c > > > > diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile > > index 5476a8ddef60..8342f65c1d96 100644 > > --- a/tools/testing/selftests/kvm/Makefile > > +++ b/tools/testing/selftests/kvm/Makefile > > @@ -35,7 +35,7 @@ endif > > > > LIBKVM = lib/assert.c lib/elf.c lib/io.c lib/kvm_util.c lib/rbtree.c lib/sparsebit.c lib/test_util.c lib/guest_modes.c lib/perf_test_util.c > > LIBKVM_x86_64 = lib/x86_64/apic.c lib/x86_64/processor.c lib/x86_64/vmx.c lib/x86_64/svm.c lib/x86_64/ucall.c lib/x86_64/handlers.S > > -LIBKVM_aarch64 = lib/aarch64/processor.c lib/aarch64/ucall.c lib/aarch64/handlers.S lib/aarch64/spinlock.c lib/aarch64/gic.c lib/aarch64/gic_v3.c > > +LIBKVM_aarch64 = lib/aarch64/processor.c lib/aarch64/ucall.c lib/aarch64/handlers.S lib/aarch64/spinlock.c lib/aarch64/gic.c lib/aarch64/gic_v3.c lib/aarch64/vgic.c > > LIBKVM_s390x = lib/s390x/processor.c lib/s390x/ucall.c lib/s390x/diag318_test_handler.c > > > > TEST_GEN_PROGS_x86_64 = x86_64/cr4_cpuid_sync_test > > diff --git a/tools/testing/selftests/kvm/include/aarch64/vgic.h b/tools/testing/selftests/kvm/include/aarch64/vgic.h > > new file mode 100644 > > index 000000000000..45bbf238147a > > --- /dev/null > > +++ b/tools/testing/selftests/kvm/include/aarch64/vgic.h > > @@ -0,0 +1,14 @@ > > +/* SPDX-License-Identifier: GPL-2.0 */ > > +/* > > + * ARM Generic Interrupt Controller (GIC) host specific defines > > + */ > > + > > +#ifndef SELFTEST_KVM_VGIC_H > > +#define SELFTEST_KVM_VGIC_H > > + > > +#include <linux/kvm.h> > > + > > +int vgic_v3_setup(struct kvm_vm *vm, unsigned int nr_vcpus, > > + uint64_t gicd_base_gpa, uint64_t gicr_base_gpa, uint32_t slot); > > + > > +#endif /* SELFTEST_KVM_VGIC_H */ > > diff --git a/tools/testing/selftests/kvm/lib/aarch64/vgic.c b/tools/testing/selftests/kvm/lib/aarch64/vgic.c > > new file mode 100644 > > index 000000000000..a0e4b986d335 > > --- /dev/null > > +++ b/tools/testing/selftests/kvm/lib/aarch64/vgic.c > > @@ -0,0 +1,67 @@ > > +// SPDX-License-Identifier: GPL-2.0 > > +/* > > + * ARM Generic Interrupt Controller (GIC) v3 host support > > + */ > > + > > +#include <linux/kvm.h> > > +#include <linux/sizes.h> > > + > > +#include "kvm_util.h" > > + > > +#define VGIC_V3_GICD_SZ (SZ_64K) > > +#define VGIC_V3_GICR_SZ (2 * SZ_64K) > > + > > +#define REDIST_REGION_ATTR_ADDR(count, base, flags, index) \ > > + (((uint64_t)(count) << 52) | \ > > + ((uint64_t)((base) >> 16) << 16) | \ > > + ((uint64_t)(flags) << 12) | \ > > + index) > > This could go in vgic.h allowing us to share it in aarch64/vgic_init.c, > where we already have the same definition. > Sure, I will move this. > > + > > +static void vgic_v3_map(struct kvm_vm *vm, uint64_t addr, unsigned int size) > > +{ > > + unsigned int n_pages = DIV_ROUND_UP(size, vm_get_page_size(vm)); > > + > > + virt_map(vm, addr, addr, n_pages); > > +} > > + > > +/* > > + * vGIC-v3 default host setup > > + * > > + * Input args: > > + * vm - KVM VM > > + * nr_vcpus - Number of vCPUs for this VM > > + * gicd_base_gpa - Guest Physical Address of the Distributor region > > + * gicr_base_gpa - Guest Physical Address of the Redistributor region > > + * > > + * Output args: None > > + * > > + * Return: GIC file-descriptor or negative error code upon failure > > + * > > + * The function creates a vGIC-v3 device and maps the distributor and > > + * redistributor regions of the guest. > > + */ > > +int vgic_v3_setup(struct kvm_vm *vm, unsigned int nr_vcpus, > > + uint64_t gicd_base_gpa, uint64_t gicr_base_gpa) > > +{ > > + uint64_t redist_attr; > > + int gic_fd; > > + > > + TEST_ASSERT(nr_vcpus <= KVM_MAX_VCPUS, > > + "Invalid number of CPUs: %u\n", nr_vcpus); > > TEST_ASSERT(!list_empty(&vm->vcpus), ...) to ensure we've created vcpus > first. To be really paranoid we could even confirm the number of vcpus in > the list matches nr_vcpus. > Great idea! I'll add these checks too. Regards Raghavendra > > + > > + gic_fd = kvm_create_device(vm, KVM_DEV_TYPE_ARM_VGIC_V3, false); > > + > > + kvm_device_access(gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR, > > + KVM_VGIC_V3_ADDR_TYPE_DIST, &gicd_base_gpa, true); > > + vgic_v3_map(vm, gicd_base_gpa, VGIC_V3_GICD_SZ); > > + > > + redist_attr = REDIST_REGION_ATTR_ADDR(nr_vcpus, gicr_base_gpa, 0, 0); > > + kvm_device_access(gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR, > > + KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &redist_attr, true); > > + vgic_v3_map(vm, gicr_base_gpa, VGIC_V3_GICR_SZ * nr_vcpus); > > + > > + kvm_device_access(gic_fd, KVM_DEV_ARM_VGIC_GRP_CTRL, > > + KVM_DEV_ARM_VGIC_CTRL_INIT, NULL, true); > > + > > + return gic_fd; > > +} > > -- > > 2.33.0.153.gba50c8fa24-goog > > Otherwise > > Reviewed-by: Andrew Jones <drjones@redhat.com> > > Thanks, > drew >
On Fri, Sep 3, 2021 at 3:52 AM Andrew Jones <drjones@redhat.com> wrote: > > On Wed, Sep 01, 2021 at 09:14:10PM +0000, Raghavendra Rao Ananta wrote: > > Implement a simple library to do perform vGIC-v3 > > setup from a host of view. This includes creating > > a vGIC device, setting up distributor and redistributor > > attributes, and mapping the guest physical addresses. > > > > Signed-off-by: Raghavendra Rao Ananta <rananta@google.com> > > > > --- > > tools/testing/selftests/kvm/Makefile | 2 +- > > .../selftests/kvm/include/aarch64/vgic.h | 14 ++++ > > .../testing/selftests/kvm/lib/aarch64/vgic.c | 67 +++++++++++++++++++ > > 3 files changed, 82 insertions(+), 1 deletion(-) > > create mode 100644 tools/testing/selftests/kvm/include/aarch64/vgic.h > > create mode 100644 tools/testing/selftests/kvm/lib/aarch64/vgic.c > > > > diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile > > index 5476a8ddef60..8342f65c1d96 100644 > > --- a/tools/testing/selftests/kvm/Makefile > > +++ b/tools/testing/selftests/kvm/Makefile > > @@ -35,7 +35,7 @@ endif > > > > LIBKVM = lib/assert.c lib/elf.c lib/io.c lib/kvm_util.c lib/rbtree.c lib/sparsebit.c lib/test_util.c lib/guest_modes.c lib/perf_test_util.c > > LIBKVM_x86_64 = lib/x86_64/apic.c lib/x86_64/processor.c lib/x86_64/vmx.c lib/x86_64/svm.c lib/x86_64/ucall.c lib/x86_64/handlers.S > > -LIBKVM_aarch64 = lib/aarch64/processor.c lib/aarch64/ucall.c lib/aarch64/handlers.S lib/aarch64/spinlock.c lib/aarch64/gic.c lib/aarch64/gic_v3.c > > +LIBKVM_aarch64 = lib/aarch64/processor.c lib/aarch64/ucall.c lib/aarch64/handlers.S lib/aarch64/spinlock.c lib/aarch64/gic.c lib/aarch64/gic_v3.c lib/aarch64/vgic.c > > LIBKVM_s390x = lib/s390x/processor.c lib/s390x/ucall.c lib/s390x/diag318_test_handler.c > > > > TEST_GEN_PROGS_x86_64 = x86_64/cr4_cpuid_sync_test > > diff --git a/tools/testing/selftests/kvm/include/aarch64/vgic.h b/tools/testing/selftests/kvm/include/aarch64/vgic.h > > new file mode 100644 > > index 000000000000..45bbf238147a > > --- /dev/null > > +++ b/tools/testing/selftests/kvm/include/aarch64/vgic.h > > @@ -0,0 +1,14 @@ > > +/* SPDX-License-Identifier: GPL-2.0 */ > > +/* > > + * ARM Generic Interrupt Controller (GIC) host specific defines > > + */ > > + > > +#ifndef SELFTEST_KVM_VGIC_H > > +#define SELFTEST_KVM_VGIC_H > > + > > +#include <linux/kvm.h> > > + > > +int vgic_v3_setup(struct kvm_vm *vm, unsigned int nr_vcpus, > > + uint64_t gicd_base_gpa, uint64_t gicr_base_gpa, uint32_t slot); > > Having seen 5 arguments used in the vgic_v3_setup call in the next patch I > came back here to refresh my memory on that parameter. 'slot' is the one I > forgot, but... > > > + > > +#endif /* SELFTEST_KVM_VGIC_H */ > > diff --git a/tools/testing/selftests/kvm/lib/aarch64/vgic.c b/tools/testing/selftests/kvm/lib/aarch64/vgic.c > > new file mode 100644 > > index 000000000000..a0e4b986d335 > > --- /dev/null > > +++ b/tools/testing/selftests/kvm/lib/aarch64/vgic.c > > @@ -0,0 +1,67 @@ > > +// SPDX-License-Identifier: GPL-2.0 > > +/* > > + * ARM Generic Interrupt Controller (GIC) v3 host support > > + */ > > + > > +#include <linux/kvm.h> > > +#include <linux/sizes.h> > > + > > +#include "kvm_util.h" > > + > > +#define VGIC_V3_GICD_SZ (SZ_64K) > > +#define VGIC_V3_GICR_SZ (2 * SZ_64K) > > + > > +#define REDIST_REGION_ATTR_ADDR(count, base, flags, index) \ > > + (((uint64_t)(count) << 52) | \ > > + ((uint64_t)((base) >> 16) << 16) | \ > > + ((uint64_t)(flags) << 12) | \ > > + index) > > + > > +static void vgic_v3_map(struct kvm_vm *vm, uint64_t addr, unsigned int size) > > +{ > > + unsigned int n_pages = DIV_ROUND_UP(size, vm_get_page_size(vm)); > > + > > + virt_map(vm, addr, addr, n_pages); > > +} > > + > > +/* > > + * vGIC-v3 default host setup > > + * > > + * Input args: > > + * vm - KVM VM > > + * nr_vcpus - Number of vCPUs for this VM > > + * gicd_base_gpa - Guest Physical Address of the Distributor region > > + * gicr_base_gpa - Guest Physical Address of the Redistributor region > > + * > > + * Output args: None > > + * > > + * Return: GIC file-descriptor or negative error code upon failure > > + * > > + * The function creates a vGIC-v3 device and maps the distributor and > > + * redistributor regions of the guest. > > + */ > > +int vgic_v3_setup(struct kvm_vm *vm, unsigned int nr_vcpus, > > + uint64_t gicd_base_gpa, uint64_t gicr_base_gpa) > > ...looks like it was forgotten here too. > You are right. I had 'slot' to try other mechanisms, but I guess I forgot to clean it up. Thanks for catching this. Regards, Raghavendra > Thanks, > drew > > > +{ > > + uint64_t redist_attr; > > + int gic_fd; > > + > > + TEST_ASSERT(nr_vcpus <= KVM_MAX_VCPUS, > > + "Invalid number of CPUs: %u\n", nr_vcpus); > > + > > + gic_fd = kvm_create_device(vm, KVM_DEV_TYPE_ARM_VGIC_V3, false); > > + > > + kvm_device_access(gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR, > > + KVM_VGIC_V3_ADDR_TYPE_DIST, &gicd_base_gpa, true); > > + vgic_v3_map(vm, gicd_base_gpa, VGIC_V3_GICD_SZ); > > + > > + redist_attr = REDIST_REGION_ATTR_ADDR(nr_vcpus, gicr_base_gpa, 0, 0); > > + kvm_device_access(gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR, > > + KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &redist_attr, true); > > + vgic_v3_map(vm, gicr_base_gpa, VGIC_V3_GICR_SZ * nr_vcpus); > > + > > + kvm_device_access(gic_fd, KVM_DEV_ARM_VGIC_GRP_CTRL, > > + KVM_DEV_ARM_VGIC_CTRL_INIT, NULL, true); > > + > > + return gic_fd; > > +} > > -- > > 2.33.0.153.gba50c8fa24-goog > > > > _______________________________________________ > > kvmarm mailing list > > kvmarm@lists.cs.columbia.edu > > https://lists.cs.columbia.edu/mailman/listinfo/kvmarm > > >
diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile index 5476a8ddef60..8342f65c1d96 100644 --- a/tools/testing/selftests/kvm/Makefile +++ b/tools/testing/selftests/kvm/Makefile @@ -35,7 +35,7 @@ endif LIBKVM = lib/assert.c lib/elf.c lib/io.c lib/kvm_util.c lib/rbtree.c lib/sparsebit.c lib/test_util.c lib/guest_modes.c lib/perf_test_util.c LIBKVM_x86_64 = lib/x86_64/apic.c lib/x86_64/processor.c lib/x86_64/vmx.c lib/x86_64/svm.c lib/x86_64/ucall.c lib/x86_64/handlers.S -LIBKVM_aarch64 = lib/aarch64/processor.c lib/aarch64/ucall.c lib/aarch64/handlers.S lib/aarch64/spinlock.c lib/aarch64/gic.c lib/aarch64/gic_v3.c +LIBKVM_aarch64 = lib/aarch64/processor.c lib/aarch64/ucall.c lib/aarch64/handlers.S lib/aarch64/spinlock.c lib/aarch64/gic.c lib/aarch64/gic_v3.c lib/aarch64/vgic.c LIBKVM_s390x = lib/s390x/processor.c lib/s390x/ucall.c lib/s390x/diag318_test_handler.c TEST_GEN_PROGS_x86_64 = x86_64/cr4_cpuid_sync_test diff --git a/tools/testing/selftests/kvm/include/aarch64/vgic.h b/tools/testing/selftests/kvm/include/aarch64/vgic.h new file mode 100644 index 000000000000..45bbf238147a --- /dev/null +++ b/tools/testing/selftests/kvm/include/aarch64/vgic.h @@ -0,0 +1,14 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * ARM Generic Interrupt Controller (GIC) host specific defines + */ + +#ifndef SELFTEST_KVM_VGIC_H +#define SELFTEST_KVM_VGIC_H + +#include <linux/kvm.h> + +int vgic_v3_setup(struct kvm_vm *vm, unsigned int nr_vcpus, + uint64_t gicd_base_gpa, uint64_t gicr_base_gpa, uint32_t slot); + +#endif /* SELFTEST_KVM_VGIC_H */ diff --git a/tools/testing/selftests/kvm/lib/aarch64/vgic.c b/tools/testing/selftests/kvm/lib/aarch64/vgic.c new file mode 100644 index 000000000000..a0e4b986d335 --- /dev/null +++ b/tools/testing/selftests/kvm/lib/aarch64/vgic.c @@ -0,0 +1,67 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * ARM Generic Interrupt Controller (GIC) v3 host support + */ + +#include <linux/kvm.h> +#include <linux/sizes.h> + +#include "kvm_util.h" + +#define VGIC_V3_GICD_SZ (SZ_64K) +#define VGIC_V3_GICR_SZ (2 * SZ_64K) + +#define REDIST_REGION_ATTR_ADDR(count, base, flags, index) \ + (((uint64_t)(count) << 52) | \ + ((uint64_t)((base) >> 16) << 16) | \ + ((uint64_t)(flags) << 12) | \ + index) + +static void vgic_v3_map(struct kvm_vm *vm, uint64_t addr, unsigned int size) +{ + unsigned int n_pages = DIV_ROUND_UP(size, vm_get_page_size(vm)); + + virt_map(vm, addr, addr, n_pages); +} + +/* + * vGIC-v3 default host setup + * + * Input args: + * vm - KVM VM + * nr_vcpus - Number of vCPUs for this VM + * gicd_base_gpa - Guest Physical Address of the Distributor region + * gicr_base_gpa - Guest Physical Address of the Redistributor region + * + * Output args: None + * + * Return: GIC file-descriptor or negative error code upon failure + * + * The function creates a vGIC-v3 device and maps the distributor and + * redistributor regions of the guest. + */ +int vgic_v3_setup(struct kvm_vm *vm, unsigned int nr_vcpus, + uint64_t gicd_base_gpa, uint64_t gicr_base_gpa) +{ + uint64_t redist_attr; + int gic_fd; + + TEST_ASSERT(nr_vcpus <= KVM_MAX_VCPUS, + "Invalid number of CPUs: %u\n", nr_vcpus); + + gic_fd = kvm_create_device(vm, KVM_DEV_TYPE_ARM_VGIC_V3, false); + + kvm_device_access(gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR, + KVM_VGIC_V3_ADDR_TYPE_DIST, &gicd_base_gpa, true); + vgic_v3_map(vm, gicd_base_gpa, VGIC_V3_GICD_SZ); + + redist_attr = REDIST_REGION_ATTR_ADDR(nr_vcpus, gicr_base_gpa, 0, 0); + kvm_device_access(gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR, + KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &redist_attr, true); + vgic_v3_map(vm, gicr_base_gpa, VGIC_V3_GICR_SZ * nr_vcpus); + + kvm_device_access(gic_fd, KVM_DEV_ARM_VGIC_GRP_CTRL, + KVM_DEV_ARM_VGIC_CTRL_INIT, NULL, true); + + return gic_fd; +}
Implement a simple library to do perform vGIC-v3 setup from a host of view. This includes creating a vGIC device, setting up distributor and redistributor attributes, and mapping the guest physical addresses. Signed-off-by: Raghavendra Rao Ananta <rananta@google.com> --- tools/testing/selftests/kvm/Makefile | 2 +- .../selftests/kvm/include/aarch64/vgic.h | 14 ++++ .../testing/selftests/kvm/lib/aarch64/vgic.c | 67 +++++++++++++++++++ 3 files changed, 82 insertions(+), 1 deletion(-) create mode 100644 tools/testing/selftests/kvm/include/aarch64/vgic.h create mode 100644 tools/testing/selftests/kvm/lib/aarch64/vgic.c