This series is based on linux-next, tag: next-20230512.
GenieZone is MediaTek proprietary hypervisor solution, and it is running
in EL2 stand alone as a type-I hypervisor. It is a pure EL2
implementation which implies it does not rely any specific host VM, and
this behavior improves GenieZone's security as it limits its interface.
To enable guest VMs running, a driver (gzvm) is provided for VMM (virtual
machine monitor) to operate. Currently, the gzvm driver supports only
crosvm.
This series supports ioctl interfaces for userspace VMM(eg., crosvm) to
operate guest VMs lifecycle, irqchip for virtual interrupt handling,
asynchronous notifcation mechanism for VMM.
Changes in v3:
- Refactor: separate arch/arm64/geniezone/gzvm_arch.c into vm.c/vcpu.c/vgic.c
- Remove redundant functions
- Fix reviewer's comments
Changes in v2:
https://lore.kernel.org/all/[email protected]/
- Refactor: move to drivers/virt/geniezone
- Refactor: decouple arch-dependent and arch-independent
- Check pending signal before entering guest context
- Fix reviewer's comments
v1: https://lore.kernel.org/all/[email protected]/
Yi-De Wu (7):
docs: geniezone: Introduce GenieZone hypervisor
dt-bindings: hypervisor: Add MediaTek GenieZone hypervisor
virt: geniezone: Introduce GenieZone hypervisor support
virt: geniezone: Add vcpu support
virt: geniezone: Add irqchip support for virtual interrupt injection
virt: geniezone: Add irqfd support
virt: geniezone: Add ioeventfd support
.../hypervisor/mediatek,geniezone-hyp.yaml | 31 +
Documentation/virt/geniezone/introduction.rst | 34 ++
MAINTAINERS | 13 +
arch/arm64/Kbuild | 1 +
arch/arm64/geniezone/Makefile | 9 +
arch/arm64/geniezone/gzvm_arch_common.h | 95 ++++
arch/arm64/geniezone/vcpu.c | 84 +++
arch/arm64/geniezone/vgic.c | 91 +++
arch/arm64/geniezone/vm.c | 174 ++++++
arch/arm64/include/uapi/asm/gzvm_arch.h | 47 ++
drivers/virt/Kconfig | 2 +-
drivers/virt/geniezone/Kconfig | 17 +
drivers/virt/geniezone/Makefile | 11 +
drivers/virt/geniezone/gzvm_common.h | 12 +
drivers/virt/geniezone/gzvm_ioeventfd.c | 263 +++++++++
drivers/virt/geniezone/gzvm_irqchip.c | 13 +
drivers/virt/geniezone/gzvm_irqfd.c | 537 ++++++++++++++++++
drivers/virt/geniezone/gzvm_main.c | 151 +++++
drivers/virt/geniezone/gzvm_vcpu.c | 260 +++++++++
drivers/virt/geniezone/gzvm_vm.c | 448 +++++++++++++++
include/linux/gzvm_drv.h | 154 +++++
include/uapi/asm-generic/Kbuild | 1 +
include/uapi/asm-generic/gzvm_arch.h | 10 +
include/uapi/linux/gzvm.h | 270 +++++++++
24 files changed, 2727 insertions(+), 1 deletion(-)
create mode 100644 Documentation/devicetree/bindings/hypervisor/mediatek,
geniezone-hyp.yaml
create mode 100644 Documentation/virt/geniezone/introduction.rst
create mode 100644 arch/arm64/geniezone/Makefile
create mode 100644 arch/arm64/geniezone/gzvm_arch_common.h
create mode 100644 arch/arm64/geniezone/vcpu.c
create mode 100644 arch/arm64/geniezone/vgic.c
create mode 100644 arch/arm64/geniezone/vm.c
create mode 100644 arch/arm64/include/uapi/asm/gzvm_arch.h
create mode 100644 drivers/virt/geniezone/Kconfig
create mode 100644 drivers/virt/geniezone/Makefile
create mode 100644 drivers/virt/geniezone/gzvm_common.h
create mode 100644 drivers/virt/geniezone/gzvm_ioeventfd.c
create mode 100644 drivers/virt/geniezone/gzvm_irqchip.c
create mode 100644 drivers/virt/geniezone/gzvm_irqfd.c
create mode 100644 drivers/virt/geniezone/gzvm_main.c
create mode 100644 drivers/virt/geniezone/gzvm_vcpu.c
create mode 100644 drivers/virt/geniezone/gzvm_vm.c
create mode 100644 include/linux/gzvm_drv.h
create mode 100644 include/uapi/asm-generic/gzvm_arch.h
create mode 100644 include/uapi/linux/gzvm.h
--
2.18.0
From: "Yingshiuan Pan" <[email protected]>
irqfd enables other threads than vcpu threads to inject virtual
interrupt through irqfd asynchronously rather through ioctl interface.
This interface is necessary for VMM which creates separated thread for
IO handling or uses vhost devices.
Signed-off-by: Yingshiuan Pan <[email protected]>
Signed-off-by: Yi-De Wu <[email protected]>
---
arch/arm64/geniezone/gzvm_arch_common.h | 6 +
drivers/virt/geniezone/Makefile | 4 +-
drivers/virt/geniezone/gzvm_irqfd.c | 537 ++++++++++++++++++++++++
drivers/virt/geniezone/gzvm_main.c | 5 +
drivers/virt/geniezone/gzvm_vcpu.c | 1 +
drivers/virt/geniezone/gzvm_vm.c | 18 +
include/linux/gzvm_drv.h | 27 ++
include/uapi/linux/gzvm.h | 20 +-
8 files changed, 615 insertions(+), 3 deletions(-)
create mode 100644 drivers/virt/geniezone/gzvm_irqfd.c
diff --git a/arch/arm64/geniezone/gzvm_arch_common.h b/arch/arm64/geniezone/gzvm_arch_common.h
index 1b315264bf24..5affa28b935a 100644
--- a/arch/arm64/geniezone/gzvm_arch_common.h
+++ b/arch/arm64/geniezone/gzvm_arch_common.h
@@ -46,6 +46,7 @@ enum {
#define MT_HVC_GZVM_CREATE_DEVICE GZVM_HCALL_ID(GZVM_FUNC_CREATE_DEVICE)
#define MT_HVC_GZVM_PROBE GZVM_HCALL_ID(GZVM_FUNC_PROBE)
#define MT_HVC_GZVM_ENABLE_CAP GZVM_HCALL_ID(GZVM_FUNC_ENABLE_CAP)
+#define GIC_V3_NR_LRS 16
/**
* gzvm_hypercall_wrapper()
@@ -72,6 +73,11 @@ static inline gzvm_vcpu_id_t get_vcpuid_from_tuple(unsigned int tuple)
return (gzvm_vcpu_id_t)(tuple & 0xffff);
}
+struct gzvm_vcpu_hwstate {
+ __u32 nr_lrs;
+ __u64 lr[GIC_V3_NR_LRS];
+};
+
static inline unsigned int
assemble_vm_vcpu_tuple(gzvm_id_t vmid, gzvm_vcpu_id_t vcpuid)
{
diff --git a/drivers/virt/geniezone/Makefile b/drivers/virt/geniezone/Makefile
index 67ba3ed76ea7..aa52cee3ca8e 100644
--- a/drivers/virt/geniezone/Makefile
+++ b/drivers/virt/geniezone/Makefile
@@ -7,5 +7,5 @@
GZVM_DIR ?= ../../../drivers/virt/geniezone
gzvm-y := $(GZVM_DIR)/gzvm_main.o $(GZVM_DIR)/gzvm_vm.o \
- $(GZVM_DIR)/gzvm_vcpu.o $(GZVM_DIR)/gzvm_irqchip.o
-
+ $(GZVM_DIR)/gzvm_vcpu.o $(GZVM_DIR)/gzvm_irqchip.o \
+ $(GZVM_DIR)/gzvm_irqfd.o
diff --git a/drivers/virt/geniezone/gzvm_irqfd.c b/drivers/virt/geniezone/gzvm_irqfd.c
new file mode 100644
index 000000000000..3a395b972fdf
--- /dev/null
+++ b/drivers/virt/geniezone/gzvm_irqfd.c
@@ -0,0 +1,537 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2023 MediaTek Inc.
+ */
+
+#include <linux/eventfd.h>
+#include <linux/syscalls.h>
+#include <linux/gzvm_drv.h>
+#include "gzvm_common.h"
+
+struct gzvm_irq_ack_notifier {
+ struct hlist_node link;
+ unsigned int gsi;
+ void (*irq_acked)(struct gzvm_irq_ack_notifier *ian);
+};
+
+/**
+ * struct gzvm_kernel_irqfd_resampler - irqfd resampler descriptor.
+ * @gzvm: Poiner to gzvm.
+ * @list_head list: List of resampling struct _irqfd objects sharing this gsi.
+ * RCU list modified under gzvm->irqfds.resampler_lock.
+ * @notifier: gzvm irq ack notifier.
+ * @list_head link: Entry in list of gzvm->irqfd.resampler_list.
+ * Use for sharing esamplers among irqfds on the same gsi.
+ * Accessed and modified under gzvm->irqfds.resampler_lock.
+ *
+ * Resampling irqfds are a special variety of irqfds used to emulate
+ * level triggered interrupts. The interrupt is asserted on eventfd
+ * trigger. On acknowledgment through the irq ack notifier, the
+ * interrupt is de-asserted and userspace is notified through the
+ * resamplefd. All resamplers on the same gsi are de-asserted
+ * together, so we don't need to track the state of each individual
+ * user. We can also therefore share the same irq source ID.
+ */
+struct gzvm_kernel_irqfd_resampler {
+ struct gzvm *gzvm;
+
+ struct list_head list;
+ struct gzvm_irq_ack_notifier notifier;
+
+ struct list_head link;
+};
+
+/**
+ * struct gzvm_kernel_irqfd: gzvm kernel irqfd descriptor.
+ * @gzvm: Pointer to gzvm.
+ * @wait: Wait queue entry.
+ * @gsi: Used for level IRQ fast-path.
+ * @resampler: The resampler used by this irqfd (resampler-only).
+ * @resamplefd: Eventfd notified on resample (resampler-only).
+ * @resampler_link: Entry in list of irqfds for a resampler (resampler-only).
+ * @eventfd: Used for setup/shutdown.
+ */
+struct gzvm_kernel_irqfd {
+ struct gzvm *gzvm;
+ wait_queue_entry_t wait;
+
+ int gsi;
+
+ struct gzvm_kernel_irqfd_resampler *resampler;
+
+ struct eventfd_ctx *resamplefd;
+
+ struct list_head resampler_link;
+
+ struct eventfd_ctx *eventfd;
+ struct list_head list;
+ poll_table pt;
+ struct work_struct shutdown;
+};
+
+static struct workqueue_struct *irqfd_cleanup_wq;
+
+/**
+ * irqfd_set_spi(): irqfd to inject virtual interrupt.
+ * @gzvm: Pointer to gzvm.
+ * @irq_source_id: irq source id.
+ * @irq: This is spi interrupt number (starts from 0 instead of 32).
+ * @level: irq triggered level.
+ * @line_status: irq status.
+ */
+static void irqfd_set_spi(struct gzvm *gzvm, int irq_source_id, u32 irq,
+ int level, bool line_status)
+{
+ if (level)
+ gzvm_irqchip_inject_irq(gzvm, irq_source_id, 0, irq, level);
+}
+
+/**
+ * irqfd_resampler_ack() - Notify all of the resampler irqfds using this GSI
+ * when IRQ de-assert once.
+ * @ian: Pointer to gzvm_irq_ack_notifier.
+ *
+ * Since resampler irqfds share an IRQ source ID, we de-assert once
+ * then notify all of the resampler irqfds using this GSI. We can't
+ * do multiple de-asserts or we risk racing with incoming re-asserts.
+ */
+static void irqfd_resampler_ack(struct gzvm_irq_ack_notifier *ian)
+{
+ struct gzvm_kernel_irqfd_resampler *resampler;
+ struct gzvm *gzvm;
+ struct gzvm_kernel_irqfd *irqfd;
+ int idx;
+
+ resampler = container_of(ian,
+ struct gzvm_kernel_irqfd_resampler, notifier);
+ gzvm = resampler->gzvm;
+
+ irqfd_set_spi(gzvm, GZVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID,
+ resampler->notifier.gsi, 0, false);
+
+ idx = srcu_read_lock(&gzvm->irq_srcu);
+
+ list_for_each_entry_srcu(irqfd, &resampler->list, resampler_link,
+ srcu_read_lock_held(&gzvm->irq_srcu)) {
+ eventfd_signal(irqfd->resamplefd, 1);
+ }
+
+ srcu_read_unlock(&gzvm->irq_srcu, idx);
+}
+
+static void gzvm_register_irq_ack_notifier(struct gzvm *gzvm,
+ struct gzvm_irq_ack_notifier *ian)
+{
+ mutex_lock(&gzvm->irq_lock);
+ hlist_add_head_rcu(&ian->link, &gzvm->irq_ack_notifier_list);
+ mutex_unlock(&gzvm->irq_lock);
+}
+
+static void gzvm_unregister_irq_ack_notifier(struct gzvm *gzvm,
+ struct gzvm_irq_ack_notifier *ian)
+{
+ mutex_lock(&gzvm->irq_lock);
+ hlist_del_init_rcu(&ian->link);
+ mutex_unlock(&gzvm->irq_lock);
+ synchronize_srcu(&gzvm->irq_srcu);
+}
+
+static void irqfd_resampler_shutdown(struct gzvm_kernel_irqfd *irqfd)
+{
+ struct gzvm_kernel_irqfd_resampler *resampler = irqfd->resampler;
+ struct gzvm *gzvm = resampler->gzvm;
+
+ mutex_lock(&gzvm->irqfds.resampler_lock);
+
+ list_del_rcu(&irqfd->resampler_link);
+ synchronize_srcu(&gzvm->irq_srcu);
+
+ if (list_empty(&resampler->list)) {
+ list_del(&resampler->link);
+ gzvm_unregister_irq_ack_notifier(gzvm, &resampler->notifier);
+ irqfd_set_spi(gzvm, GZVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID,
+ resampler->notifier.gsi, 0, false);
+ kfree(resampler);
+ }
+
+ mutex_unlock(&gzvm->irqfds.resampler_lock);
+}
+
+/**
+ * irqfd_shutdown() - Race-free decouple logic (ordering is critical).
+ * @work: Pointer to work_struct.
+ */
+static void irqfd_shutdown(struct work_struct *work)
+{
+ struct gzvm_kernel_irqfd *irqfd =
+ container_of(work, struct gzvm_kernel_irqfd, shutdown);
+ struct gzvm *gzvm = irqfd->gzvm;
+ u64 cnt;
+
+ /* Make sure irqfd has been initialized in assign path. */
+ synchronize_srcu(&gzvm->irq_srcu);
+
+ /*
+ * Synchronize with the wait-queue and unhook ourselves to prevent
+ * further events.
+ */
+ eventfd_ctx_remove_wait_queue(irqfd->eventfd, &irqfd->wait, &cnt);
+
+ if (irqfd->resampler) {
+ irqfd_resampler_shutdown(irqfd);
+ eventfd_ctx_put(irqfd->resamplefd);
+ }
+
+ /*
+ * It is now safe to release the object's resources
+ */
+ eventfd_ctx_put(irqfd->eventfd);
+ kfree(irqfd);
+}
+
+/**
+ * irqfd_is_active() - Assumes gzvm->irqfds.lock is held.
+ * @irqfd: Pointer to gzvm_kernel_irqfd.
+ */
+static bool irqfd_is_active(struct gzvm_kernel_irqfd *irqfd)
+{
+ return list_empty(&irqfd->list) ? false : true;
+}
+
+/**
+ * irqfd_deactivate() - Mark the irqfd as inactive and schedule it for removal.
+ * assumes gzvm->irqfds.lock is held.
+ * @irqfd: Pointer to gzvm_kernel_irqfd.
+ */
+static void irqfd_deactivate(struct gzvm_kernel_irqfd *irqfd)
+{
+ if (!irqfd_is_active(irqfd))
+ return;
+
+ list_del_init(&irqfd->list);
+
+ queue_work(irqfd_cleanup_wq, &irqfd->shutdown);
+}
+
+/**
+ * irqfd_wakeup() - Wake up irqfd to do virtual interrupt injection.
+ * @wait: Pointer to wait_queue_entry_t.
+ * @mode:
+ * @sync:
+ * @key:
+ */
+static int irqfd_wakeup(wait_queue_entry_t *wait, unsigned int mode, int sync,
+ void *key)
+{
+ struct gzvm_kernel_irqfd *irqfd =
+ container_of(wait, struct gzvm_kernel_irqfd, wait);
+ __poll_t flags = key_to_poll(key);
+ struct gzvm *gzvm = irqfd->gzvm;
+
+ if (flags & EPOLLIN) {
+ u64 cnt;
+
+ eventfd_ctx_do_read(irqfd->eventfd, &cnt);
+ /* gzvm's irq injection is not blocked, don't need workq */
+ irqfd_set_spi(gzvm, GZVM_USERSPACE_IRQ_SOURCE_ID, irqfd->gsi,
+ 1, false);
+ }
+
+ if (flags & EPOLLHUP) {
+ /* The eventfd is closing, detach from GZVM */
+ unsigned long iflags;
+
+ spin_lock_irqsave(&gzvm->irqfds.lock, iflags);
+
+ /*
+ * Do more check if someone deactivated the irqfd before
+ * we could acquire the irqfds.lock.
+ */
+ if (irqfd_is_active(irqfd))
+ irqfd_deactivate(irqfd);
+
+ spin_unlock_irqrestore(&gzvm->irqfds.lock, iflags);
+ }
+
+ return 0;
+}
+
+static void irqfd_ptable_queue_proc(struct file *file, wait_queue_head_t *wqh,
+ poll_table *pt)
+{
+ struct gzvm_kernel_irqfd *irqfd =
+ container_of(pt, struct gzvm_kernel_irqfd, pt);
+ add_wait_queue_priority(wqh, &irqfd->wait);
+}
+
+static int gzvm_irqfd_assign(struct gzvm *gzvm, struct gzvm_irqfd *args)
+{
+ struct gzvm_kernel_irqfd *irqfd, *tmp;
+ struct fd f;
+ struct eventfd_ctx *eventfd = NULL, *resamplefd = NULL;
+ int ret;
+ __poll_t events;
+ int idx;
+
+ irqfd = kzalloc(sizeof(*irqfd), GFP_KERNEL_ACCOUNT);
+ if (!irqfd)
+ return -ENOMEM;
+
+ irqfd->gzvm = gzvm;
+ irqfd->gsi = args->gsi;
+ irqfd->resampler = NULL;
+
+ INIT_LIST_HEAD(&irqfd->list);
+ INIT_WORK(&irqfd->shutdown, irqfd_shutdown);
+
+ f = fdget(args->fd);
+ if (!f.file) {
+ ret = -EBADF;
+ goto out;
+ }
+
+ eventfd = eventfd_ctx_fileget(f.file);
+ if (IS_ERR(eventfd)) {
+ ret = PTR_ERR(eventfd);
+ goto fail;
+ }
+
+ irqfd->eventfd = eventfd;
+
+ if (args->flags & GZVM_IRQFD_FLAG_RESAMPLE) {
+ struct gzvm_kernel_irqfd_resampler *resampler;
+
+ resamplefd = eventfd_ctx_fdget(args->resamplefd);
+ if (IS_ERR(resamplefd)) {
+ ret = PTR_ERR(resamplefd);
+ goto fail;
+ }
+
+ irqfd->resamplefd = resamplefd;
+ INIT_LIST_HEAD(&irqfd->resampler_link);
+
+ mutex_lock(&gzvm->irqfds.resampler_lock);
+
+ list_for_each_entry(resampler,
+ &gzvm->irqfds.resampler_list, link) {
+ if (resampler->notifier.gsi == irqfd->gsi) {
+ irqfd->resampler = resampler;
+ break;
+ }
+ }
+
+ if (!irqfd->resampler) {
+ resampler = kzalloc(sizeof(*resampler),
+ GFP_KERNEL_ACCOUNT);
+ if (!resampler) {
+ ret = -ENOMEM;
+ mutex_unlock(&gzvm->irqfds.resampler_lock);
+ goto fail;
+ }
+
+ resampler->gzvm = gzvm;
+ INIT_LIST_HEAD(&resampler->list);
+ resampler->notifier.gsi = irqfd->gsi;
+ resampler->notifier.irq_acked = irqfd_resampler_ack;
+ INIT_LIST_HEAD(&resampler->link);
+
+ list_add(&resampler->link, &gzvm->irqfds.resampler_list);
+ gzvm_register_irq_ack_notifier(gzvm,
+ &resampler->notifier);
+ irqfd->resampler = resampler;
+ }
+
+ list_add_rcu(&irqfd->resampler_link, &irqfd->resampler->list);
+ synchronize_srcu(&gzvm->irq_srcu);
+
+ mutex_unlock(&gzvm->irqfds.resampler_lock);
+ }
+
+ /*
+ * Install our own custom wake-up handling so we are notified via
+ * a callback whenever someone signals the underlying eventfd
+ */
+ init_waitqueue_func_entry(&irqfd->wait, irqfd_wakeup);
+ init_poll_funcptr(&irqfd->pt, irqfd_ptable_queue_proc);
+
+ spin_lock_irq(&gzvm->irqfds.lock);
+
+ ret = 0;
+ list_for_each_entry(tmp, &gzvm->irqfds.items, list) {
+ if (irqfd->eventfd != tmp->eventfd)
+ continue;
+ /* This fd is used for another irq already. */
+ pr_err("already used: gsi=%d fd=%d\n", args->gsi, args->fd);
+ ret = -EBUSY;
+ spin_unlock_irq(&gzvm->irqfds.lock);
+ goto fail;
+ }
+
+ idx = srcu_read_lock(&gzvm->irq_srcu);
+
+ list_add_tail(&irqfd->list, &gzvm->irqfds.items);
+
+ spin_unlock_irq(&gzvm->irqfds.lock);
+
+ /*
+ * Check if there was an event already pending on the eventfd
+ * before we registered, and trigger it as if we didn't miss it.
+ */
+ events = vfs_poll(f.file, &irqfd->pt);
+
+ /* In case there is already a pending event */
+ if (events & EPOLLIN)
+ irqfd_set_spi(gzvm, GZVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID,
+ irqfd->gsi, 1, false);
+
+ srcu_read_unlock(&gzvm->irq_srcu, idx);
+
+ /*
+ * do not drop the file until the irqfd is fully initialized, otherwise
+ * we might race against the EPOLLHUP
+ */
+ fdput(f);
+ return 0;
+
+fail:
+ if (irqfd->resampler)
+ irqfd_resampler_shutdown(irqfd);
+
+ if (resamplefd && !IS_ERR(resamplefd))
+ eventfd_ctx_put(resamplefd);
+
+ if (eventfd && !IS_ERR(eventfd))
+ eventfd_ctx_put(eventfd);
+
+ fdput(f);
+
+out:
+ kfree(irqfd);
+ return ret;
+}
+
+static void gzvm_notify_acked_gsi(struct gzvm *gzvm, int gsi)
+{
+ struct gzvm_irq_ack_notifier *gian;
+
+ hlist_for_each_entry_srcu(gian, &gzvm->irq_ack_notifier_list,
+ link, srcu_read_lock_held(&gzvm->irq_srcu))
+ if (gian->gsi == gsi)
+ gian->irq_acked(gian);
+}
+
+void gzvm_notify_acked_irq(struct gzvm *gzvm, unsigned int gsi)
+{
+ int idx;
+
+ idx = srcu_read_lock(&gzvm->irq_srcu);
+ gzvm_notify_acked_gsi(gzvm, gsi);
+ srcu_read_unlock(&gzvm->irq_srcu, idx);
+}
+
+/**
+ * gzvm_irqfd_deassign() - Shutdown any irqfd's that match fd+gsi.
+ * @gzvm: Pointer to gzvm.
+ * @args: Pointer to gzvm_irqfd.
+ */
+static int gzvm_irqfd_deassign(struct gzvm *gzvm, struct gzvm_irqfd *args)
+{
+ struct gzvm_kernel_irqfd *irqfd, *tmp;
+ struct eventfd_ctx *eventfd;
+
+ eventfd = eventfd_ctx_fdget(args->fd);
+ if (IS_ERR(eventfd))
+ return PTR_ERR(eventfd);
+
+ spin_lock_irq(&gzvm->irqfds.lock);
+
+ list_for_each_entry_safe(irqfd, tmp, &gzvm->irqfds.items, list) {
+ if (irqfd->eventfd == eventfd && irqfd->gsi == args->gsi)
+ irqfd_deactivate(irqfd);
+ }
+
+ spin_unlock_irq(&gzvm->irqfds.lock);
+ eventfd_ctx_put(eventfd);
+
+ /*
+ * Block until we know all outstanding shutdown jobs have completed
+ * so that we guarantee there will not be any more interrupts on this
+ * gsi once this deassign function returns.
+ */
+ flush_workqueue(irqfd_cleanup_wq);
+
+ return 0;
+}
+
+int gzvm_irqfd(struct gzvm *gzvm, struct gzvm_irqfd *args)
+{
+ if (args->flags &
+ ~(GZVM_IRQFD_FLAG_DEASSIGN | GZVM_IRQFD_FLAG_RESAMPLE))
+ return -EINVAL;
+
+ if (args->flags & GZVM_IRQFD_FLAG_DEASSIGN)
+ return gzvm_irqfd_deassign(gzvm, args);
+
+ return gzvm_irqfd_assign(gzvm, args);
+}
+
+/**
+ * gzvm_vm_irqfd_init() - Initialize irqfd data structure per VM
+ */
+int gzvm_vm_irqfd_init(struct gzvm *gzvm)
+{
+ mutex_init(&gzvm->irq_lock);
+
+ spin_lock_init(&gzvm->irqfds.lock);
+ INIT_LIST_HEAD(&gzvm->irqfds.items);
+ INIT_LIST_HEAD(&gzvm->irqfds.resampler_list);
+ if (init_srcu_struct(&gzvm->irq_srcu))
+ return -EINVAL;
+ INIT_HLIST_HEAD(&gzvm->irq_ack_notifier_list);
+ mutex_init(&gzvm->irqfds.resampler_lock);
+
+ return 0;
+}
+
+/**
+ * gzvm_vm_irqfd_release() - This function is called as the gzvm VM fd is being
+ * released. Shutdown all irqfds that still remain open.
+ * @gzvm: Pointer to gzvm.
+ */
+void gzvm_vm_irqfd_release(struct gzvm *gzvm)
+{
+ struct gzvm_kernel_irqfd *irqfd, *tmp;
+
+ spin_lock_irq(&gzvm->irqfds.lock);
+
+ list_for_each_entry_safe(irqfd, tmp, &gzvm->irqfds.items, list)
+ irqfd_deactivate(irqfd);
+
+ spin_unlock_irq(&gzvm->irqfds.lock);
+
+ /*
+ * Block until we know all outstanding shutdown jobs have completed.
+ */
+ flush_workqueue(irqfd_cleanup_wq);
+}
+
+/**
+ * gzvm_drv_irqfd_init() - Erase flushing work items when a VM exits.
+ *
+ * Create a host-wide workqueue for issuing deferred shutdown requests
+ * aggregated from all vm* instances. We need our own isolated
+ * queue to ease flushing work items when a VM exits.
+ */
+int gzvm_drv_irqfd_init(void)
+{
+ irqfd_cleanup_wq = alloc_workqueue("gzvm-irqfd-cleanup", 0, 0);
+ if (!irqfd_cleanup_wq)
+ return -ENOMEM;
+
+ return 0;
+}
+
+void gzvm_drv_irqfd_exit(void)
+{
+ destroy_workqueue(irqfd_cleanup_wq);
+}
diff --git a/drivers/virt/geniezone/gzvm_main.c b/drivers/virt/geniezone/gzvm_main.c
index e3fe3ad9ffce..121816a09c8e 100644
--- a/drivers/virt/geniezone/gzvm_main.c
+++ b/drivers/virt/geniezone/gzvm_main.c
@@ -113,11 +113,16 @@ static int gzvm_drv_probe(struct platform_device *pdev)
return ret;
gzvm_debug_dev = pdev;
+ ret = gzvm_drv_irqfd_init();
+ if (ret)
+ return ret;
+
return 0;
}
static int gzvm_drv_remove(struct platform_device *pdev)
{
+ gzvm_drv_irqfd_exit();
destroy_all_vm();
misc_deregister(&gzvm_dev);
return 0;
diff --git a/drivers/virt/geniezone/gzvm_vcpu.c b/drivers/virt/geniezone/gzvm_vcpu.c
index d1bb2cba1893..fdf6e6297e66 100644
--- a/drivers/virt/geniezone/gzvm_vcpu.c
+++ b/drivers/virt/geniezone/gzvm_vcpu.c
@@ -211,6 +211,7 @@ int gzvm_vm_ioctl_create_vcpu(struct gzvm *gzvm, u32 cpuid)
ret = -ENOMEM;
goto free_vcpu;
}
+ vcpu->hwstate = (void *)vcpu->run + PAGE_SIZE;
vcpu->vcpuid = cpuid;
vcpu->gzvm = gzvm;
mutex_init(&vcpu->lock);
diff --git a/drivers/virt/geniezone/gzvm_vm.c b/drivers/virt/geniezone/gzvm_vm.c
index 7ed4e4c3c1ee..403192731597 100644
--- a/drivers/virt/geniezone/gzvm_vm.c
+++ b/drivers/virt/geniezone/gzvm_vm.c
@@ -298,6 +298,15 @@ static long gzvm_vm_ioctl(struct file *filp, unsigned int ioctl,
ret = gzvm_vm_ioctl_create_device(gzvm, argp);
break;
}
+ case GZVM_IRQFD: {
+ struct gzvm_irqfd data;
+
+ ret = -EFAULT;
+ if (copy_from_user(&data, argp, sizeof(data)))
+ goto out;
+ ret = gzvm_irqfd(gzvm, &data);
+ break;
+ }
case GZVM_ENABLE_CAP: {
struct gzvm_enable_cap cap;
@@ -322,6 +331,7 @@ static void gzvm_destroy_vm(struct gzvm *gzvm)
mutex_lock(&gzvm->lock);
+ gzvm_vm_irqfd_release(gzvm);
gzvm_destroy_vcpus(gzvm);
gzvm_arch_destroy_vm(gzvm->vm_id);
@@ -367,6 +377,14 @@ static struct gzvm *gzvm_create_vm(unsigned long vm_type)
gzvm->mm = current->mm;
mutex_init(&gzvm->lock);
+ ret = gzvm_vm_irqfd_init(gzvm);
+ if (ret) {
+ dev_err(&gzvm_debug_dev->dev,
+ "Failed to initialize irqfd\n");
+ kfree(gzvm);
+ return ERR_PTR(ret);
+ }
+
mutex_lock(&gzvm_list_lock);
list_add(&gzvm->vm_list, &gzvm_list);
mutex_unlock(&gzvm_list_lock);
diff --git a/include/linux/gzvm_drv.h b/include/linux/gzvm_drv.h
index 1e7c81597e9a..a54a7915c514 100644
--- a/include/linux/gzvm_drv.h
+++ b/include/linux/gzvm_drv.h
@@ -10,6 +10,7 @@
#include <linux/mutex.h>
#include <linux/platform_device.h>
#include <linux/gzvm.h>
+#include <linux/srcu.h>
#define MODULE_NAME "gzvm"
#define GZVM_VCPU_MMAP_SIZE PAGE_SIZE
@@ -25,6 +26,8 @@
#define ERR_NOT_SUPPORTED (-24)
#define ERR_NOT_IMPLEMENTED (-27)
#define ERR_FAULT (-40)
+#define GZVM_USERSPACE_IRQ_SOURCE_ID 0
+#define GZVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID 1
/*
* The following data structures are for data transferring between driver and
@@ -68,6 +71,7 @@ struct gzvm_vcpu {
/* lock of vcpu*/
struct mutex lock;
struct gzvm_vcpu_run *run;
+ struct gzvm_vcpu_hwstate *hwstate;
};
struct gzvm {
@@ -77,8 +81,23 @@ struct gzvm {
struct gzvm_memslot memslot[GZVM_MAX_MEM_REGION];
/* lock for list_add*/
struct mutex lock;
+
+ struct {
+ /* lock for irqfds list operation */
+ spinlock_t lock;
+ struct list_head items;
+ struct list_head resampler_list;
+ /* lock for irqfds resampler */
+ struct mutex resampler_lock;
+ } irqfds;
+
struct list_head vm_list;
gzvm_id_t vm_id;
+
+ struct hlist_head irq_ack_notifier_list;
+ struct srcu_struct irq_srcu;
+ /* lock for irq injection */
+ struct mutex irq_lock;
};
long gzvm_dev_ioctl_check_extension(struct gzvm *gzvm, unsigned long args);
@@ -111,6 +130,14 @@ int gzvm_arch_create_device(gzvm_id_t vm_id, struct gzvm_create_device *gzvm_dev
int gzvm_arch_inject_irq(struct gzvm *gzvm, unsigned int vcpu_idx, u32 irq_type,
u32 irq, bool level);
+void gzvm_notify_acked_irq(struct gzvm *gzvm, unsigned int gsi);
+int gzvm_irqfd(struct gzvm *gzvm, struct gzvm_irqfd *args);
+int gzvm_drv_irqfd_init(void);
+void gzvm_drv_irqfd_exit(void);
+int gzvm_vm_irqfd_init(struct gzvm *gzvm);
+void gzvm_vm_irqfd_release(struct gzvm *gzvm);
+void gzvm_sync_hwstate(struct gzvm_vcpu *vcpu);
+
extern struct platform_device *gzvm_debug_dev;
#endif /* __GZVM_DRV_H__ */
diff --git a/include/uapi/linux/gzvm.h b/include/uapi/linux/gzvm.h
index b39ace47d589..0751f9f4f76f 100644
--- a/include/uapi/linux/gzvm.h
+++ b/include/uapi/linux/gzvm.h
@@ -226,4 +226,22 @@ struct gzvm_one_reg {
#define GZVM_REG_GENERIC 0x0000000000000000ULL
-#endif /* __GZVM_H__ */
+#define GZVM_IRQFD_FLAG_DEASSIGN (1 << 0)
+/**
+ * GZVM_IRQFD_FLAG_RESAMPLE indicates resamplefd is valid and specifies
+ * the irqfd to operate in resampling mode for level triggered interrupt
+ * emulation.
+ */
+#define GZVM_IRQFD_FLAG_RESAMPLE (1 << 1)
+
+struct gzvm_irqfd {
+ __u32 fd;
+ __u32 gsi;
+ __u32 flags;
+ __u32 resamplefd;
+ __u8 pad[16];
+};
+
+#define GZVM_IRQFD _IOW(GZVM_IOC_MAGIC, 0x76, struct gzvm_irqfd)
+
+#endif /* __GZVM__H__ */
--
2.18.0
From: "Yingshiuan Pan" <[email protected]>
Enable GenieZone to handle virtual interrupt injection request.
Signed-off-by: Yingshiuan Pan <[email protected]>
Signed-off-by: Yi-De Wu <[email protected]>
---
arch/arm64/geniezone/Makefile | 2 +-
arch/arm64/geniezone/vgic.c | 91 +++++++++++++++++++++++++++
drivers/virt/geniezone/Makefile | 2 +-
drivers/virt/geniezone/gzvm_common.h | 12 ++++
drivers/virt/geniezone/gzvm_irqchip.c | 13 ++++
drivers/virt/geniezone/gzvm_vm.c | 80 ++++++++++++++++++++++-
include/linux/gzvm_drv.h | 4 ++
include/uapi/linux/gzvm.h | 38 ++++++++++-
8 files changed, 238 insertions(+), 4 deletions(-)
create mode 100644 arch/arm64/geniezone/vgic.c
create mode 100644 drivers/virt/geniezone/gzvm_common.h
create mode 100644 drivers/virt/geniezone/gzvm_irqchip.c
diff --git a/arch/arm64/geniezone/Makefile b/arch/arm64/geniezone/Makefile
index 69b0a4abeab0..0e4f1087f9de 100644
--- a/arch/arm64/geniezone/Makefile
+++ b/arch/arm64/geniezone/Makefile
@@ -4,6 +4,6 @@
#
include $(srctree)/drivers/virt/geniezone/Makefile
-gzvm-y += vm.o vcpu.o
+gzvm-y += vm.o vcpu.o vgic.o
obj-$(CONFIG_MTK_GZVM) += gzvm.o
diff --git a/arch/arm64/geniezone/vgic.c b/arch/arm64/geniezone/vgic.c
new file mode 100644
index 000000000000..7e26a800b9d0
--- /dev/null
+++ b/arch/arm64/geniezone/vgic.c
@@ -0,0 +1,91 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2023 MediaTek Inc.
+ */
+
+#include <linux/irqchip/arm-gic-v3.h>
+#include <kvm/arm_vgic.h>
+
+#include <linux/gzvm.h>
+#include <linux/gzvm_drv.h>
+#include "gzvm_arch_common.h"
+
+/* is_irq_valid() - Check the irq number and irq_type are matched */
+static bool is_irq_valid(u32 irq, u32 irq_type)
+{
+ switch (irq_type) {
+ case GZVM_IRQ_TYPE_CPU:
+ /* 0 ~ 15: SGI */
+ if (likely(irq <= GZVM_IRQ_CPU_FIQ))
+ return true;
+ break;
+ case GZVM_IRQ_TYPE_PPI:
+ /* 16 ~ 31: PPI */
+ if (likely(irq >= VGIC_NR_SGIS && irq < VGIC_NR_PRIVATE_IRQS))
+ return true;
+ break;
+ case GZVM_IRQ_TYPE_SPI:
+ /* 32 ~ : SPT */
+ if (likely(irq >= VGIC_NR_PRIVATE_IRQS))
+ return true;
+ break;
+ default:
+ return false;
+ }
+ return false;
+}
+
+/**
+ * gzvm_vgic_inject_irq() - Inject virtual interrupt to a VM
+ * @vcpu_idx: vcpu index, only valid if PPI
+ * @irq: irq number
+ * @level: 1 if true else 0
+ */
+static int gzvm_vgic_inject_irq(struct gzvm *gzvm, unsigned int vcpu_idx, u32 irq_type,
+ u32 irq, bool level)
+{
+ unsigned long a1 = assemble_vm_vcpu_tuple(gzvm->vm_id, vcpu_idx);
+ struct arm_smccc_res res;
+
+ if (!unlikely(is_irq_valid(irq, irq_type)))
+ return -EINVAL;
+
+ gzvm_hypcall_wrapper(MT_HVC_GZVM_IRQ_LINE, a1, irq, level,
+ 0, 0, 0, 0, &res);
+ if (res.a0) {
+ pr_err("Failed to set IRQ level (%d) to irq#%u on vcpu %d with ret=%d\n",
+ level, irq, vcpu_idx, (int)res.a0);
+ return -EFAULT;
+ }
+
+ return 0;
+}
+
+/**
+ * gzvm_vgic_inject_spi() - Inject virtual spi interrupt
+ *
+ * @spi_irq: This is spi interrupt number (starts from 0 instead of 32)
+ *
+ * Return 0 if succeed else other negative values indicating each errors
+ */
+static int gzvm_vgic_inject_spi(struct gzvm *gzvm, unsigned int vcpu_idx,
+ u32 spi_irq, bool level)
+{
+ return gzvm_vgic_inject_irq(gzvm, 0, GZVM_IRQ_TYPE_SPI,
+ spi_irq + VGIC_NR_PRIVATE_IRQS, level);
+}
+
+int gzvm_arch_create_device(gzvm_id_t vm_id, struct gzvm_create_device *gzvm_dev)
+{
+ struct arm_smccc_res res;
+
+ return gzvm_hypcall_wrapper(MT_HVC_GZVM_CREATE_DEVICE, vm_id,
+ virt_to_phys(gzvm_dev), 0, 0, 0, 0, 0, &res);
+}
+
+int gzvm_arch_inject_irq(struct gzvm *gzvm, unsigned int vcpu_idx, u32 irq_type,
+ u32 irq, bool level)
+{
+ /* default use spi */
+ return gzvm_vgic_inject_spi(gzvm, vcpu_idx, irq, level);
+}
diff --git a/drivers/virt/geniezone/Makefile b/drivers/virt/geniezone/Makefile
index 8ebf2db0c970..67ba3ed76ea7 100644
--- a/drivers/virt/geniezone/Makefile
+++ b/drivers/virt/geniezone/Makefile
@@ -7,5 +7,5 @@
GZVM_DIR ?= ../../../drivers/virt/geniezone
gzvm-y := $(GZVM_DIR)/gzvm_main.o $(GZVM_DIR)/gzvm_vm.o \
- $(GZVM_DIR)/gzvm_vcpu.o
+ $(GZVM_DIR)/gzvm_vcpu.o $(GZVM_DIR)/gzvm_irqchip.o
diff --git a/drivers/virt/geniezone/gzvm_common.h b/drivers/virt/geniezone/gzvm_common.h
new file mode 100644
index 000000000000..d0e39ded79e6
--- /dev/null
+++ b/drivers/virt/geniezone/gzvm_common.h
@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) 2023 MediaTek Inc.
+ */
+
+#ifndef __GZ_COMMON_H__
+#define __GZ_COMMON_H__
+
+int gzvm_irqchip_inject_irq(struct gzvm *gzvm, unsigned int vcpu_idx,
+ u32 irq_type, u32 irq, bool level);
+
+#endif /* __GZVM_COMMON_H__ */
diff --git a/drivers/virt/geniezone/gzvm_irqchip.c b/drivers/virt/geniezone/gzvm_irqchip.c
new file mode 100644
index 000000000000..134bca3ab247
--- /dev/null
+++ b/drivers/virt/geniezone/gzvm_irqchip.c
@@ -0,0 +1,13 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2023 MediaTek Inc.
+ */
+
+#include <linux/gzvm_drv.h>
+#include "gzvm_common.h"
+
+int gzvm_irqchip_inject_irq(struct gzvm *gzvm, unsigned int vcpu_idx,
+ u32 irq_type, u32 irq, bool level)
+{
+ return gzvm_arch_inject_irq(gzvm, vcpu_idx, irq_type, irq, level);
+}
diff --git a/drivers/virt/geniezone/gzvm_vm.c b/drivers/virt/geniezone/gzvm_vm.c
index dc9992f0c68a..7ed4e4c3c1ee 100644
--- a/drivers/virt/geniezone/gzvm_vm.c
+++ b/drivers/virt/geniezone/gzvm_vm.c
@@ -12,6 +12,7 @@
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/gzvm_drv.h>
+#include "gzvm_common.h"
static DEFINE_MUTEX(gzvm_list_lock);
static LIST_HEAD(gzvm_list);
@@ -28,7 +29,8 @@ static LIST_HEAD(gzvm_list);
* * 0 - Succeed
* * -EFAULT - Failed to convert
*/
-static int gzvm_gfn_to_pfn_memslot(struct gzvm_memslot *memslot, u64 gfn, u64 *pfn)
+static int gzvm_gfn_to_pfn_memslot(struct gzvm_memslot *memslot, u64 gfn,
+ u64 *pfn)
{
hfn_t __pfn;
struct kvm_memory_slot kvm_slot = {0};
@@ -186,6 +188,68 @@ gzvm_vm_ioctl_set_memory_region(struct gzvm *gzvm,
return register_memslot_addr_range(gzvm, memslot);
}
+static int gzvm_vm_ioctl_irq_line(struct gzvm *gzvm,
+ struct gzvm_irq_level *irq_level)
+{
+ u32 irq = irq_level->irq;
+ unsigned int irq_type, vcpu_idx, irq_num;
+ bool level = irq_level->level;
+
+ irq_type = (irq >> GZVM_IRQ_TYPE_SHIFT) & GZVM_IRQ_TYPE_MASK;
+ vcpu_idx = (irq >> GZVM_IRQ_VCPU_SHIFT) & GZVM_IRQ_VCPU_MASK;
+ vcpu_idx += ((irq >> GZVM_IRQ_VCPU2_SHIFT) & GZVM_IRQ_VCPU2_MASK) *
+ (GZVM_IRQ_VCPU_MASK + 1);
+ irq_num = (irq >> GZVM_IRQ_NUM_SHIFT) & GZVM_IRQ_NUM_MASK;
+
+ return gzvm_irqchip_inject_irq(gzvm, vcpu_idx, irq_type, irq_num,
+ level);
+}
+
+static int gzvm_vm_ioctl_create_device(struct gzvm *gzvm, void __user *argp)
+{
+ struct gzvm_create_device *gzvm_dev;
+ void *dev_data = NULL;
+ int ret;
+
+ gzvm_dev = (struct gzvm_create_device *)alloc_pages_exact(PAGE_SIZE,
+ GFP_KERNEL);
+ if (!gzvm_dev)
+ return -ENOMEM;
+ if (copy_from_user(gzvm_dev, argp, sizeof(*gzvm_dev))) {
+ ret = -EFAULT;
+ goto err_free_dev;
+ }
+
+ if (gzvm_dev->attr_addr != 0 && gzvm_dev->attr_size != 0) {
+ size_t attr_size = gzvm_dev->attr_size;
+ void __user *attr_addr = (void __user *)gzvm_dev->attr_addr;
+
+ /* Size of device specific data should not be over a page. */
+ if (attr_size > PAGE_SIZE)
+ return -EINVAL;
+
+ dev_data = alloc_pages_exact(attr_size, GFP_KERNEL);
+ if (!dev_data) {
+ ret = -ENOMEM;
+ goto err_free_dev;
+ }
+
+ if (copy_from_user(dev_data, attr_addr, attr_size)) {
+ ret = -EFAULT;
+ goto err_free_dev_data;
+ }
+ gzvm_dev->attr_addr = virt_to_phys(dev_data);
+ }
+
+ ret = gzvm_arch_create_device(gzvm->vm_id, gzvm_dev);
+err_free_dev_data:
+ if (dev_data)
+ free_pages_exact(dev_data, 0);
+err_free_dev:
+ free_pages_exact(gzvm_dev, 0);
+ return ret;
+}
+
static int gzvm_vm_ioctl_enable_cap(struct gzvm *gzvm,
struct gzvm_enable_cap *cap,
void __user *argp)
@@ -220,6 +284,20 @@ static long gzvm_vm_ioctl(struct file *filp, unsigned int ioctl,
ret = gzvm_vm_ioctl_set_memory_region(gzvm, &userspace_mem);
break;
}
+ case GZVM_IRQ_LINE: {
+ struct gzvm_irq_level irq_event;
+
+ ret = -EFAULT;
+ if (copy_from_user(&irq_event, argp, sizeof(irq_event)))
+ goto out;
+
+ ret = gzvm_vm_ioctl_irq_line(gzvm, &irq_event);
+ break;
+ }
+ case GZVM_CREATE_DEVICE: {
+ ret = gzvm_vm_ioctl_create_device(gzvm, argp);
+ break;
+ }
case GZVM_ENABLE_CAP: {
struct gzvm_enable_cap cap;
diff --git a/include/linux/gzvm_drv.h b/include/linux/gzvm_drv.h
index 5736ddf97741..1e7c81597e9a 100644
--- a/include/linux/gzvm_drv.h
+++ b/include/linux/gzvm_drv.h
@@ -107,6 +107,10 @@ int gzvm_arch_create_vcpu(gzvm_id_t vm_id, int vcpuid, void *run);
int gzvm_arch_vcpu_run(struct gzvm_vcpu *vcpu, __u64 *exit_reason);
int gzvm_arch_destroy_vcpu(gzvm_id_t vm_id, int vcpuid);
+int gzvm_arch_create_device(gzvm_id_t vm_id, struct gzvm_create_device *gzvm_dev);
+int gzvm_arch_inject_irq(struct gzvm *gzvm, unsigned int vcpu_idx, u32 irq_type,
+ u32 irq, bool level);
+
extern struct platform_device *gzvm_debug_dev;
#endif /* __GZVM_DRV_H__ */
diff --git a/include/uapi/linux/gzvm.h b/include/uapi/linux/gzvm.h
index dbf74d63379b..b39ace47d589 100644
--- a/include/uapi/linux/gzvm.h
+++ b/include/uapi/linux/gzvm.h
@@ -83,7 +83,43 @@ struct gzvm_userspace_memory_region {
#define GZVM_IRQ_CPU_IRQ 0
#define GZVM_IRQ_CPU_FIQ 1
-/* ioctls for vcpu fds */
+struct gzvm_irq_level {
+ union {
+ __u32 irq;
+ __s32 status;
+ };
+ __u32 level;
+};
+
+#define GZVM_IRQ_LINE _IOW(GZVM_IOC_MAGIC, 0x61, \
+ struct gzvm_irq_level)
+
+enum gzvm_device_type {
+ GZVM_DEV_TYPE_ARM_VGIC_V3_DIST,
+ GZVM_DEV_TYPE_ARM_VGIC_V3_REDIST,
+ GZVM_DEV_TYPE_MAX,
+};
+
+struct gzvm_create_device {
+ __u32 dev_type; /* device type */
+ __u32 id; /* out: device id */
+ __u64 flags; /* device specific flags */
+ __u64 dev_addr; /* device ipa address in VM's view */
+ __u64 dev_reg_size; /* device register range size */
+ /*
+ * If user -> kernel, this is user virtual address of device specific
+ * attributes (if needed). If kernel->hypervisor, this is ipa.
+ */
+ __u64 attr_addr;
+ __u64 attr_size; /* size of device specific attributes */
+};
+
+#define GZVM_CREATE_DEVICE _IOWR(GZVM_IOC_MAGIC, 0xe0, \
+ struct gzvm_create_device)
+
+/*
+ * ioctls for vcpu fds
+ */
#define GZVM_RUN _IO(GZVM_IOC_MAGIC, 0x80)
/* VM exit reason */
--
2.18.0