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Groups > linux.kernel > #1462531 > unrolled thread
| Started by | Zhou Jie <zhoujie2011@cn.fujitsu.com> |
|---|---|
| First post | 2016-08-15 05:00 +0200 |
| Last post | 2016-08-19 03:00 +0200 |
| Articles | 2 — 1 participant |
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Re: [PATCH v3] vfio : add aer process Zhou Jie <zhoujie2011@cn.fujitsu.com> - 2016-08-15 05:00 +0200
Re: [Qemu-devel] [PATCH v3] vfio : add aer process Zhou Jie <zhoujie2011@cn.fujitsu.com> - 2016-08-19 03:00 +0200
| From | Zhou Jie <zhoujie2011@cn.fujitsu.com> |
|---|---|
| Date | 2016-08-15 05:00 +0200 |
| Subject | Re: [PATCH v3] vfio : add aer process |
| Message-ID | <s6gi6-8bY-7@gated-at.bofh.it> |
ping
On 2016/8/2 11:57, Zhou Jie wrote:
> During aer err occurs and resume do following to
> protect device from being accessed.
> 1. Make config space read only.
> 2. Disable INTx/MSI Interrupt.
> 3. Do nothing for bar regions.
>
> Signed-off-by: Zhou Jie <zhoujie2011@cn.fujitsu.com>
> ---
> v2-v3:
> 1. Call init_completion() in vfio_pci_probe.
> 2. Call reinit_completion() in vfio_pci_aer_err_detected.
> 3. Remove unnecessary brackets.
>
> v1-v2:
> 1. Add aer process to vfio driver.
>
> drivers/vfio/pci/vfio_pci.c | 48 +++++++++++++++++++++++++++++++++++++
> drivers/vfio/pci/vfio_pci_private.h | 2 ++
> include/uapi/linux/vfio.h | 2 ++
> 3 files changed, 52 insertions(+)
>
> diff --git a/drivers/vfio/pci/vfio_pci.c b/drivers/vfio/pci/vfio_pci.c
> index d624a52..4c246a1 100644
> --- a/drivers/vfio/pci/vfio_pci.c
> +++ b/drivers/vfio/pci/vfio_pci.c
> @@ -648,6 +648,15 @@ static long vfio_pci_ioctl(void *device_data,
> struct vfio_pci_device *vdev = device_data;
> unsigned long minsz;
>
> + if (vdev->aer_error_in_progress && (cmd == VFIO_DEVICE_SET_IRQS ||
> + cmd == VFIO_DEVICE_RESET || cmd == VFIO_DEVICE_PCI_HOT_RESET)) {
> + int ret;
> + ret = wait_for_completion_interruptible(
> + &vdev->aer_error_completion);
> + if (ret)
> + return ret;
> + }
> +
> if (cmd == VFIO_DEVICE_GET_INFO) {
> struct vfio_device_info info;
>
> @@ -664,6 +673,10 @@ static long vfio_pci_ioctl(void *device_data,
> if (vdev->reset_works)
> info.flags |= VFIO_DEVICE_FLAGS_RESET;
>
> + info.flags |= VFIO_DEVICE_FLAGS_AERPROCESS;
> + if (vdev->aer_error_in_progress)
> + info.flags |= VFIO_DEVICE_FLAGS_INAERPROCESS;
> +
> info.num_regions = VFIO_PCI_NUM_REGIONS + vdev->num_regions;
> info.num_irqs = VFIO_PCI_NUM_IRQS;
>
> @@ -1070,6 +1083,13 @@ static ssize_t vfio_pci_rw(void *device_data, char __user *buf,
>
> switch (index) {
> case VFIO_PCI_CONFIG_REGION_INDEX:
> + if (vdev->aer_error_in_progress && iswrite) {
> + int ret;
> + ret = wait_for_completion_interruptible(
> + &vdev->aer_error_completion);
> + if (ret)
> + return ret;
> + }
> return vfio_pci_config_rw(vdev, buf, count, ppos, iswrite);
>
> case VFIO_PCI_ROM_REGION_INDEX:
> @@ -1228,6 +1248,7 @@ static int vfio_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
> vdev->irq_type = VFIO_PCI_NUM_IRQS;
> mutex_init(&vdev->igate);
> spin_lock_init(&vdev->irqlock);
> + init_completion(&vdev->aer_error_completion);
>
> ret = vfio_add_group_dev(&pdev->dev, &vfio_pci_ops, vdev);
> if (ret) {
> @@ -1300,6 +1321,11 @@ static pci_ers_result_t vfio_pci_aer_err_detected(struct pci_dev *pdev,
>
> mutex_lock(&vdev->igate);
>
> + vdev->aer_error_in_progress = true;
> + reinit_completion(&vdev->aer_error_completion);
> + vfio_pci_set_irqs_ioctl(vdev, VFIO_IRQ_SET_DATA_NONE |
> + VFIO_IRQ_SET_ACTION_TRIGGER,
> + vdev->irq_type, 0, 0, NULL);
> if (vdev->err_trigger)
> eventfd_signal(vdev->err_trigger, 1);
>
> @@ -1310,8 +1336,30 @@ static pci_ers_result_t vfio_pci_aer_err_detected(struct pci_dev *pdev,
> return PCI_ERS_RESULT_CAN_RECOVER;
> }
>
> +static void vfio_pci_aer_resume(struct pci_dev *pdev)
> +{
> + struct vfio_pci_device *vdev;
> + struct vfio_device *device;
> +
> + device = vfio_device_get_from_dev(&pdev->dev);
> + if (device == NULL)
> + return;
> +
> + vdev = vfio_device_data(device);
> + if (vdev == NULL) {
> + vfio_device_put(device);
> + return;
> + }
> +
> + vdev->aer_error_in_progress = false;
> + complete_all(&vdev->aer_error_completion);
> +
> + vfio_device_put(device);
> +}
> +
> static const struct pci_error_handlers vfio_err_handlers = {
> .error_detected = vfio_pci_aer_err_detected,
> + .resume = vfio_pci_aer_resume,
> };
>
> static struct pci_driver vfio_pci_driver = {
> diff --git a/drivers/vfio/pci/vfio_pci_private.h b/drivers/vfio/pci/vfio_pci_private.h
> index 2128de8..7430d92 100644
> --- a/drivers/vfio/pci/vfio_pci_private.h
> +++ b/drivers/vfio/pci/vfio_pci_private.h
> @@ -91,6 +91,8 @@ struct vfio_pci_device {
> bool has_vga;
> bool needs_reset;
> bool nointx;
> + bool aer_error_in_progress;
> + struct completion aer_error_completion;
> struct pci_saved_state *pci_saved_state;
> int refcnt;
> struct eventfd_ctx *err_trigger;
> diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h
> index 255a211..59b9cf6 100644
> --- a/include/uapi/linux/vfio.h
> +++ b/include/uapi/linux/vfio.h
> @@ -198,6 +198,8 @@ struct vfio_device_info {
> #define VFIO_DEVICE_FLAGS_PCI (1 << 1) /* vfio-pci device */
> #define VFIO_DEVICE_FLAGS_PLATFORM (1 << 2) /* vfio-platform device */
> #define VFIO_DEVICE_FLAGS_AMBA (1 << 3) /* vfio-amba device */
> +#define VFIO_DEVICE_FLAGS_AERPROCESS (1 << 4) /* support aer error progress */
> +#define VFIO_DEVICE_FLAGS_INAERPROCESS (1 << 5)/* status in aer error progress */
> __u32 num_regions; /* Max region index + 1 */
> __u32 num_irqs; /* Max IRQ index + 1 */
> };
>
--
------------------------------------------------
周潔
Dept 1
No. 6 Wenzhu Road,
Nanjing, 210012, China
TEL：+86+25-86630566-8557
FUJITSU INTERNAL：7998-8557
E-Mail：zhoujie2011@cn.fujitsu.com
------------------------------------------------
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| From | Zhou Jie <zhoujie2011@cn.fujitsu.com> |
|---|---|
| Date | 2016-08-19 03:00 +0200 |
| Subject | Re: [Qemu-devel] [PATCH v3] vfio : add aer process |
| Message-ID | <s7Gka-6XF-15@gated-at.bofh.it> |
| In reply to | #1462531 |
ping
On 2016/8/15 10:53, Zhou Jie wrote:
> ping
>
> On 2016/8/2 11:57, Zhou Jie wrote:
>> During aer err occurs and resume do following to
>> protect device from being accessed.
>> 1. Make config space read only.
>> 2. Disable INTx/MSI Interrupt.
>> 3. Do nothing for bar regions.
>>
>> Signed-off-by: Zhou Jie <zhoujie2011@cn.fujitsu.com>
>> ---
>> v2-v3:
>> 1. Call init_completion() in vfio_pci_probe.
>> 2. Call reinit_completion() in vfio_pci_aer_err_detected.
>> 3. Remove unnecessary brackets.
>>
>> v1-v2:
>> 1. Add aer process to vfio driver.
>>
>> drivers/vfio/pci/vfio_pci.c | 48
>> +++++++++++++++++++++++++++++++++++++
>> drivers/vfio/pci/vfio_pci_private.h | 2 ++
>> include/uapi/linux/vfio.h | 2 ++
>> 3 files changed, 52 insertions(+)
>>
>> diff --git a/drivers/vfio/pci/vfio_pci.c b/drivers/vfio/pci/vfio_pci.c
>> index d624a52..4c246a1 100644
>> --- a/drivers/vfio/pci/vfio_pci.c
>> +++ b/drivers/vfio/pci/vfio_pci.c
>> @@ -648,6 +648,15 @@ static long vfio_pci_ioctl(void *device_data,
>> struct vfio_pci_device *vdev = device_data;
>> unsigned long minsz;
>>
>> + if (vdev->aer_error_in_progress && (cmd == VFIO_DEVICE_SET_IRQS ||
>> + cmd == VFIO_DEVICE_RESET || cmd == VFIO_DEVICE_PCI_HOT_RESET)) {
>> + int ret;
>> + ret = wait_for_completion_interruptible(
>> + &vdev->aer_error_completion);
>> + if (ret)
>> + return ret;
>> + }
>> +
>> if (cmd == VFIO_DEVICE_GET_INFO) {
>> struct vfio_device_info info;
>>
>> @@ -664,6 +673,10 @@ static long vfio_pci_ioctl(void *device_data,
>> if (vdev->reset_works)
>> info.flags |= VFIO_DEVICE_FLAGS_RESET;
>>
>> + info.flags |= VFIO_DEVICE_FLAGS_AERPROCESS;
>> + if (vdev->aer_error_in_progress)
>> + info.flags |= VFIO_DEVICE_FLAGS_INAERPROCESS;
>> +
>> info.num_regions = VFIO_PCI_NUM_REGIONS + vdev->num_regions;
>> info.num_irqs = VFIO_PCI_NUM_IRQS;
>>
>> @@ -1070,6 +1083,13 @@ static ssize_t vfio_pci_rw(void *device_data,
>> char __user *buf,
>>
>> switch (index) {
>> case VFIO_PCI_CONFIG_REGION_INDEX:
>> + if (vdev->aer_error_in_progress && iswrite) {
>> + int ret;
>> + ret = wait_for_completion_interruptible(
>> + &vdev->aer_error_completion);
>> + if (ret)
>> + return ret;
>> + }
>> return vfio_pci_config_rw(vdev, buf, count, ppos, iswrite);
>>
>> case VFIO_PCI_ROM_REGION_INDEX:
>> @@ -1228,6 +1248,7 @@ static int vfio_pci_probe(struct pci_dev *pdev,
>> const struct pci_device_id *id)
>> vdev->irq_type = VFIO_PCI_NUM_IRQS;
>> mutex_init(&vdev->igate);
>> spin_lock_init(&vdev->irqlock);
>> + init_completion(&vdev->aer_error_completion);
>>
>> ret = vfio_add_group_dev(&pdev->dev, &vfio_pci_ops, vdev);
>> if (ret) {
>> @@ -1300,6 +1321,11 @@ static pci_ers_result_t
>> vfio_pci_aer_err_detected(struct pci_dev *pdev,
>>
>> mutex_lock(&vdev->igate);
>>
>> + vdev->aer_error_in_progress = true;
>> + reinit_completion(&vdev->aer_error_completion);
>> + vfio_pci_set_irqs_ioctl(vdev, VFIO_IRQ_SET_DATA_NONE |
>> + VFIO_IRQ_SET_ACTION_TRIGGER,
>> + vdev->irq_type, 0, 0, NULL);
>> if (vdev->err_trigger)
>> eventfd_signal(vdev->err_trigger, 1);
>>
>> @@ -1310,8 +1336,30 @@ static pci_ers_result_t
>> vfio_pci_aer_err_detected(struct pci_dev *pdev,
>> return PCI_ERS_RESULT_CAN_RECOVER;
>> }
>>
>> +static void vfio_pci_aer_resume(struct pci_dev *pdev)
>> +{
>> + struct vfio_pci_device *vdev;
>> + struct vfio_device *device;
>> +
>> + device = vfio_device_get_from_dev(&pdev->dev);
>> + if (device == NULL)
>> + return;
>> +
>> + vdev = vfio_device_data(device);
>> + if (vdev == NULL) {
>> + vfio_device_put(device);
>> + return;
>> + }
>> +
>> + vdev->aer_error_in_progress = false;
>> + complete_all(&vdev->aer_error_completion);
>> +
>> + vfio_device_put(device);
>> +}
>> +
>> static const struct pci_error_handlers vfio_err_handlers = {
>> .error_detected = vfio_pci_aer_err_detected,
>> + .resume = vfio_pci_aer_resume,
>> };
>>
>> static struct pci_driver vfio_pci_driver = {
>> diff --git a/drivers/vfio/pci/vfio_pci_private.h
>> b/drivers/vfio/pci/vfio_pci_private.h
>> index 2128de8..7430d92 100644
>> --- a/drivers/vfio/pci/vfio_pci_private.h
>> +++ b/drivers/vfio/pci/vfio_pci_private.h
>> @@ -91,6 +91,8 @@ struct vfio_pci_device {
>> bool has_vga;
>> bool needs_reset;
>> bool nointx;
>> + bool aer_error_in_progress;
>> + struct completion aer_error_completion;
>> struct pci_saved_state *pci_saved_state;
>> int refcnt;
>> struct eventfd_ctx *err_trigger;
>> diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h
>> index 255a211..59b9cf6 100644
>> --- a/include/uapi/linux/vfio.h
>> +++ b/include/uapi/linux/vfio.h
>> @@ -198,6 +198,8 @@ struct vfio_device_info {
>> #define VFIO_DEVICE_FLAGS_PCI (1 << 1) /* vfio-pci device */
>> #define VFIO_DEVICE_FLAGS_PLATFORM (1 << 2) /* vfio-platform
>> device */
>> #define VFIO_DEVICE_FLAGS_AMBA (1 << 3) /* vfio-amba device */
>> +#define VFIO_DEVICE_FLAGS_AERPROCESS (1 << 4) /* support aer
>> error progress */
>> +#define VFIO_DEVICE_FLAGS_INAERPROCESS (1 << 5)/* status in aer
>> error progress */
>> __u32 num_regions; /* Max region index + 1 */
>> __u32 num_irqs; /* Max IRQ index + 1 */
>> };
>>
>
--
------------------------------------------------
周潔
Dept 1
No. 6 Wenzhu Road,
Nanjing, 210012, China
TEL：+86+25-86630566-8557
FUJITSU INTERNAL：7998-8557
E-Mail：zhoujie2011@cn.fujitsu.com
------------------------------------------------
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