From: shuo.a.liu@intel.com
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
"H . Peter Anvin" <hpa@zytor.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Sean Christopherson <sean.j.christopherson@intel.com>,
Yu Wang <yu1.wang@intel.com>,
Reinette Chatre <reinette.chatre@intel.com>,
x86@kernel.org, Shuo Liu <shuo.a.liu@intel.com>,
Zhi Wang <zhi.a.wang@intel.com>,
Zhenyu Wang <zhenyuw@linux.intel.com>
Subject: [PATCH 12/17] virt: acrn: Introduce interrupt injection interfaces
Date: Tue, 25 Aug 2020 10:45:12 +0800 [thread overview]
Message-ID: <20200825024516.16766-13-shuo.a.liu@intel.com> (raw)
In-Reply-To: <20200825024516.16766-1-shuo.a.liu@intel.com>
From: Shuo Liu <shuo.a.liu@intel.com>
ACRN userspace need to inject virtual interrupts into a User VM in
devices emulation.
HSM needs provide interfaces to do so.
Introduce following interrupt injection interfaces:
ioctl ACRN_IOCTL_SET_IRQLINE:
Pass data from userspace to the hypervisor, and inform the hypervisor
to inject a virtual IOAPIC GSI interrupt to a User VM.
ioctl ACRN_IOCTL_INJECT_MSI:
Pass data struct acrn_msi_entry from userspace to the hypervisor, and
inform the hypervisor to inject a virtual MSI to a User VM.
ioctl ACRN_IOCTL_VM_INTR_MONITOR:
Set a 4-Kbyte aligned shared page for statistics information of
interrupts of a User VM.
Signed-off-by: Shuo Liu <shuo.a.liu@intel.com>
Reviewed-by: Zhi Wang <zhi.a.wang@intel.com>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Cc: Zhi Wang <zhi.a.wang@intel.com>
Cc: Zhenyu Wang <zhenyuw@linux.intel.com>
Cc: Yu Wang <yu1.wang@intel.com>
Cc: Reinette Chatre <reinette.chatre@intel.com>
---
drivers/virt/acrn/acrn_drv.h | 4 ++++
drivers/virt/acrn/hsm.c | 35 ++++++++++++++++++++++++++++++
drivers/virt/acrn/hypercall.h | 41 +++++++++++++++++++++++++++++++++++
drivers/virt/acrn/vm.c | 35 ++++++++++++++++++++++++++++++
include/uapi/linux/acrn.h | 17 +++++++++++++++
5 files changed, 132 insertions(+)
diff --git a/drivers/virt/acrn/acrn_drv.h b/drivers/virt/acrn/acrn_drv.h
index 62340ec90eb5..c08235ba21fc 100644
--- a/drivers/virt/acrn/acrn_drv.h
+++ b/drivers/virt/acrn/acrn_drv.h
@@ -153,6 +153,7 @@ extern rwlock_t acrn_vm_list_lock;
* @ioreq_buf: I/O request shared buffer
* @ioreq_page: The page of the I/O request shared buffer
* @pci_conf_addr: Address of a PCI configuration access emulation
+ * @monitor_page: Page of interrupt statistics of User VM
*/
struct acrn_vm {
struct list_head list;
@@ -168,6 +169,7 @@ struct acrn_vm {
struct acrn_io_request_buffer *ioreq_buf;
struct page *ioreq_page;
u32 pci_conf_addr;
+ struct page *monitor_page;
};
struct acrn_vm *acrn_vm_create(struct acrn_vm *vm,
@@ -194,4 +196,6 @@ struct acrn_ioreq_client *acrn_ioreq_client_create(struct acrn_vm *vm,
const char *name);
void acrn_ioreq_client_destroy(struct acrn_ioreq_client *client);
+int acrn_msi_inject(u16 vmid, u64 msi_addr, u64 msi_data);
+
#endif /* __ACRN_HSM_DRV_H */
diff --git a/drivers/virt/acrn/hsm.c b/drivers/virt/acrn/hsm.c
index ab2a052900e8..11369fb2d1c5 100644
--- a/drivers/virt/acrn/hsm.c
+++ b/drivers/virt/acrn/hsm.c
@@ -52,7 +52,9 @@ static long acrn_dev_ioctl(struct file *filp, unsigned int cmd,
struct acrn_ioreq_notify notify;
struct acrn_ptdev_irq *irq_info;
struct acrn_vm_memmap memmap;
+ struct acrn_msi_entry *msi;
struct acrn_pcidev *pcidev;
+ struct page *page;
int ret = 0;
if (cmd == ACRN_IOCTL_GET_API_VERSION) {
@@ -176,6 +178,39 @@ static long acrn_dev_ioctl(struct file *filp, unsigned int cmd,
pr_err("Failed to reset intr for ptdev!\n");
kfree(irq_info);
break;
+ case ACRN_IOCTL_SET_IRQLINE:
+ ret = hcall_set_irqline(vm->vmid, ioctl_param);
+ if (ret < 0)
+ pr_err("Failed to set interrupt line!\n");
+ break;
+ case ACRN_IOCTL_INJECT_MSI:
+ msi = memdup_user((void __user *)ioctl_param,
+ sizeof(struct acrn_msi_entry));
+ if (IS_ERR(msi))
+ return PTR_ERR(msi);
+
+ ret = hcall_inject_msi(vm->vmid, virt_to_phys(msi));
+ if (ret < 0)
+ pr_err("Failed to inject MSI!\n");
+ kfree(msi);
+ break;
+ case ACRN_IOCTL_VM_INTR_MONITOR:
+ ret = get_user_pages_fast(ioctl_param, 1, FOLL_WRITE, &page);
+ if (unlikely(ret != 1)) {
+ pr_err("Failed to pin intr hdr buffer!\n");
+ return -ENOMEM;
+ }
+
+ ret = hcall_vm_intr_monitor(vm->vmid, page_to_phys(page));
+ if (ret < 0) {
+ put_page(page);
+ pr_err("Failed to monitor intr data!\n");
+ return ret;
+ }
+ if (vm->monitor_page)
+ put_page(vm->monitor_page);
+ vm->monitor_page = page;
+ break;
case ACRN_IOCTL_CREATE_IOREQ_CLIENT:
if (vm->default_client)
return -EEXIST;
diff --git a/drivers/virt/acrn/hypercall.h b/drivers/virt/acrn/hypercall.h
index 41409df943a2..f220358633ab 100644
--- a/drivers/virt/acrn/hypercall.h
+++ b/drivers/virt/acrn/hypercall.h
@@ -24,6 +24,11 @@
#define HC_RESET_VM _HC_ID(HC_ID, HC_ID_VM_BASE + 0x05)
#define HC_SET_VCPU_REGS _HC_ID(HC_ID, HC_ID_VM_BASE + 0x06)
+#define HC_ID_IRQ_BASE 0x20UL
+#define HC_INJECT_MSI _HC_ID(HC_ID, HC_ID_IRQ_BASE + 0x03)
+#define HC_VM_INTR_MONITOR _HC_ID(HC_ID, HC_ID_IRQ_BASE + 0x04)
+#define HC_SET_IRQLINE _HC_ID(HC_ID, HC_ID_IRQ_BASE + 0x05)
+
#define HC_ID_IOREQ_BASE 0x30UL
#define HC_SET_IOREQ_BUFFER _HC_ID(HC_ID, HC_ID_IOREQ_BASE + 0x00)
#define HC_NOTIFY_REQUEST_FINISH _HC_ID(HC_ID, HC_ID_IOREQ_BASE + 0x01)
@@ -115,6 +120,42 @@ static inline long hcall_set_vcpu_regs(u64 vmid, u64 regs_state)
return acrn_hypercall2(HC_SET_VCPU_REGS, vmid, regs_state);
}
+/**
+ * hcall_inject_msi() - Deliver a MSI interrupt to a User VM
+ * @vmid: User VM ID
+ * @msi: Service VM GPA of MSI message
+ *
+ * Return: 0 on success, <0 on failure
+ */
+static inline long hcall_inject_msi(u64 vmid, u64 msi)
+{
+ return acrn_hypercall2(HC_INJECT_MSI, vmid, msi);
+}
+
+/**
+ * hcall_vm_intr_monitor() - Set a shared page for User VM interrupt statistics
+ * @vmid: User VM ID
+ * @addr: Service VM GPA of the shared page
+ *
+ * Return: 0 on success, <0 on failure
+ */
+static inline long hcall_vm_intr_monitor(u64 vmid, u64 addr)
+{
+ return acrn_hypercall2(HC_VM_INTR_MONITOR, vmid, addr);
+}
+
+/**
+ * hcall_set_irqline() - Set or clear an interrupt line
+ * @vmid: User VM ID
+ * @op: Service VM GPA of interrupt line operations
+ *
+ * Return: 0 on success, <0 on failure
+ */
+static inline long hcall_set_irqline(u64 vmid, u64 op)
+{
+ return acrn_hypercall2(HC_SET_IRQLINE, vmid, op);
+}
+
/**
* hcall_set_ioreq_buffer() - Set up the shared buffer for I/O Requests.
* @vmid: User VM ID
diff --git a/drivers/virt/acrn/vm.c b/drivers/virt/acrn/vm.c
index 1cd5f3b09f12..97c809490758 100644
--- a/drivers/virt/acrn/vm.c
+++ b/drivers/virt/acrn/vm.c
@@ -64,6 +64,10 @@ int acrn_vm_destroy(struct acrn_vm *vm)
write_unlock_bh(&acrn_vm_list_lock);
acrn_ioreq_deinit(vm);
+ if (vm->monitor_page) {
+ put_page(vm->monitor_page);
+ vm->monitor_page = NULL;
+ }
ret = hcall_destroy_vm(vm->vmid);
if (ret < 0) {
@@ -78,3 +82,34 @@ int acrn_vm_destroy(struct acrn_vm *vm)
vm->vmid = ACRN_INVALID_VMID;
return 0;
}
+
+/**
+ * acrn_inject_msi() - Inject a MSI interrupt into a User VM
+ * @vmid: User VM ID
+ * @msi_addr: The MSI address
+ * @msi_data: The MSI data
+ *
+ * Return: 0 on success, <0 on error
+ */
+int acrn_msi_inject(u16 vmid, u64 msi_addr, u64 msi_data)
+{
+ struct acrn_msi_entry *msi;
+ int ret;
+
+ /* might be used in interrupt context, so use GFP_ATOMIC */
+ msi = kzalloc(sizeof(*msi), GFP_ATOMIC);
+ if (!msi)
+ return -ENOMEM;
+
+ /*
+ * msi_addr: addr[19:12] with dest vcpu id
+ * msi_data: data[7:0] with vector
+ */
+ msi->msi_addr = msi_addr;
+ msi->msi_data = msi_data;
+ ret = hcall_inject_msi(vmid, virt_to_phys(msi));
+ if (ret < 0)
+ pr_err("Failed to inject MSI to VM %u!\n", vmid);
+ kfree(msi);
+ return ret;
+}
diff --git a/include/uapi/linux/acrn.h b/include/uapi/linux/acrn.h
index 45891da3d8a1..a20bee88cf9a 100644
--- a/include/uapi/linux/acrn.h
+++ b/include/uapi/linux/acrn.h
@@ -353,6 +353,16 @@ struct acrn_pcidev {
__u32 reserved[6];
} __attribute__((aligned(8)));
+/**
+ * struct acrn_msi_entry - Info for injecting a MSI interrupt to a VM
+ * @msi_addr: MSI addr[19:12] with dest vCPU ID
+ * @msi_data: MSI data[7:0] with vector
+ */
+struct acrn_msi_entry {
+ __u64 msi_addr;
+ __u64 msi_data;
+};
+
/* The ioctl type, documented in ioctl-number.rst */
#define ACRN_IOCTL_TYPE 0xA2
@@ -375,6 +385,13 @@ struct acrn_pcidev {
#define ACRN_IOCTL_SET_VCPU_REGS \
_IOW(ACRN_IOCTL_TYPE, 0x16, struct acrn_vcpu_regs)
+#define ACRN_IOCTL_INJECT_MSI \
+ _IOW(ACRN_IOCTL_TYPE, 0x23, struct acrn_msi_entry)
+#define ACRN_IOCTL_VM_INTR_MONITOR \
+ _IOW(ACRN_IOCTL_TYPE, 0x24, unsigned long)
+#define ACRN_IOCTL_SET_IRQLINE \
+ _IOW(ACRN_IOCTL_TYPE, 0x25, __u64)
+
#define ACRN_IOCTL_NOTIFY_REQUEST_FINISH \
_IOW(ACRN_IOCTL_TYPE, 0x31, struct acrn_ioreq_notify)
#define ACRN_IOCTL_CREATE_IOREQ_CLIENT \
--
2.28.0
next prev parent reply other threads:[~2020-08-25 2:51 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-25 2:45 [PATCH 00/17] HSM driver for ACRN hypervisor shuo.a.liu
2020-08-25 2:45 ` [PATCH 01/17] docs: acrn: Introduce ACRN shuo.a.liu
2020-08-25 2:45 ` [PATCH 02/17] x86/acrn: Introduce acrn_{setup, remove}_intr_handler() shuo.a.liu
2020-08-25 2:45 ` [PATCH 03/17] x86/acrn: Introduce an API to check if a VM is privileged shuo.a.liu
2020-08-25 2:45 ` [PATCH 04/17] x86/acrn: Introduce hypercall interfaces shuo.a.liu
2020-08-25 2:45 ` [PATCH 05/17] virt: acrn: Introduce ACRN HSM basic driver shuo.a.liu
2020-08-28 10:25 ` Greg Kroah-Hartman
2020-08-29 10:46 ` Shuo A Liu
2020-08-29 16:12 ` Dave Hansen
2020-08-30 8:16 ` Shuo A Liu
2020-08-25 2:45 ` [PATCH 06/17] virt: acrn: Introduce VM management interfaces shuo.a.liu
2020-08-28 10:27 ` Greg Kroah-Hartman
2020-08-29 10:55 ` Shuo A Liu
2020-08-28 10:27 ` Greg Kroah-Hartman
2020-08-29 11:04 ` Shuo A Liu
2020-08-30 7:23 ` Greg Kroah-Hartman
2020-08-31 6:25 ` Shuo A Liu
2020-08-25 2:45 ` [PATCH 07/17] virt: acrn: Introduce an ioctl to set vCPU registers state shuo.a.liu
2020-08-25 2:45 ` [PATCH 08/17] virt: acrn: Introduce EPT mapping management shuo.a.liu
2020-08-25 2:45 ` [PATCH 09/17] virt: acrn: Introduce I/O request management shuo.a.liu
2020-08-25 2:45 ` [PATCH 10/17] virt: acrn: Introduce PCI configuration space PIO accesses combiner shuo.a.liu
2020-08-25 2:45 ` [PATCH 11/17] virt: acrn: Introduce interfaces for PCI device passthrough shuo.a.liu
2020-08-25 2:45 ` shuo.a.liu [this message]
2020-08-25 2:45 ` [PATCH 13/17] virt: acrn: Introduce interfaces to query C-states and P-states allowed by hypervisor shuo.a.liu
2020-08-25 2:45 ` [PATCH 14/17] virt: acrn: Introduce I/O ranges operation interfaces shuo.a.liu
2020-08-25 2:45 ` [PATCH 15/17] virt: acrn: Introduce ioeventfd shuo.a.liu
2020-08-25 2:45 ` [PATCH 16/17] virt: acrn: Introduce irqfd shuo.a.liu
2020-08-25 2:45 ` [PATCH 17/17] virt: acrn: Introduce an interface for Service VM to control vCPU shuo.a.liu
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