From: Dave Jiang <dave.jiang@intel.com>
To: alex.williamson@redhat.com, kwankhede@nvidia.com,
tglx@linutronix.de, vkoul@kernel.org
Cc: megha.dey@intel.com, jacob.jun.pan@intel.com,
ashok.raj@intel.com, jgg@mellanox.com, yi.l.liu@intel.com,
baolu.lu@intel.com, kevin.tian@intel.com,
sanjay.k.kumar@intel.com, tony.luck@intel.com,
dan.j.williams@intel.com, eric.auger@redhat.com,
parav@mellanox.com, netanelg@mellanox.com, shahafs@mellanox.com,
pbonzini@redhat.com, dmaengine@vger.kernel.org,
linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Subject: [PATCH v5 12/14] vfio/mdev: idxd: add irq bypass for IMS vectors
Date: Fri, 05 Feb 2021 13:54:10 -0700 [thread overview]
Message-ID: <161255845083.339900.12339149209312159722.stgit@djiang5-desk3.ch.intel.com> (raw)
In-Reply-To: <161255810396.339900.7646244556839438765.stgit@djiang5-desk3.ch.intel.com>
Add support to bypass host for IMS interrupts configured for the guest.
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
---
drivers/vfio/mdev/Kconfig | 1 +
drivers/vfio/mdev/idxd/mdev.c | 17 +++++++++++++++--
drivers/vfio/mdev/idxd/mdev.h | 1 +
3 files changed, 17 insertions(+), 2 deletions(-)
diff --git a/drivers/vfio/mdev/Kconfig b/drivers/vfio/mdev/Kconfig
index e9540e43d1f1..ab0a6f0930bc 100644
--- a/drivers/vfio/mdev/Kconfig
+++ b/drivers/vfio/mdev/Kconfig
@@ -22,6 +22,7 @@ config VFIO_MDEV_IDXD
depends on VFIO && VFIO_MDEV && X86_64
select AUXILIARY_BUS
select IMS_MSI_ARRAY
+ select IRQ_BYPASS_MANAGER
default n
help
VFIO based mediated device driver for Intel Accelerator Devices driver.
diff --git a/drivers/vfio/mdev/idxd/mdev.c b/drivers/vfio/mdev/idxd/mdev.c
index 8a4af882a47f..d59920f78109 100644
--- a/drivers/vfio/mdev/idxd/mdev.c
+++ b/drivers/vfio/mdev/idxd/mdev.c
@@ -616,9 +616,13 @@ static int msix_trigger_unregister(struct vdcm_idxd *vidxd, int index)
dev_dbg(dev, "disable MSIX trigger %d\n", index);
if (index) {
+ struct irq_bypass_producer *producer;
u32 auxval;
+ producer = &vidxd->vdev.producer[index];
+ irq_bypass_unregister_producer(producer);
irq_entry = &vidxd->irq_entries[index];
+
if (irq_entry->irq_set) {
free_irq(irq_entry->irq, irq_entry);
irq_entry->irq_set = false;
@@ -654,9 +658,10 @@ static int msix_trigger_register(struct vdcm_idxd *vidxd, u32 fd, int index)
}
if (index) {
- u32 pasid;
- u32 auxval;
+ struct irq_bypass_producer *producer;
+ u32 pasid, auxval;
+ producer = &vidxd->vdev.producer[index];
irq_entry = &vidxd->irq_entries[index];
rc = idxd_mdev_get_pasid(mdev, &pasid);
if (rc < 0)
@@ -682,6 +687,14 @@ static int msix_trigger_register(struct vdcm_idxd *vidxd, u32 fd, int index)
irq_set_auxdata(irq_entry->irq, IMS_AUXDATA_CONTROL_WORD, auxval);
return rc;
}
+
+ producer->token = trigger;
+ producer->irq = irq_entry->irq;
+ rc = irq_bypass_register_producer(producer);
+ if (unlikely(rc))
+ dev_info(dev, "irq bypass producer (token %p) registration failed: %d\n",
+ producer->token, rc);
+
irq_entry->irq_set = true;
}
diff --git a/drivers/vfio/mdev/idxd/mdev.h b/drivers/vfio/mdev/idxd/mdev.h
index 8421b4962ac7..1f867de416e7 100644
--- a/drivers/vfio/mdev/idxd/mdev.h
+++ b/drivers/vfio/mdev/idxd/mdev.h
@@ -45,6 +45,7 @@ struct idxd_vdev {
struct mdev_device *mdev;
struct vfio_group *vfio_group;
struct eventfd_ctx *msix_trigger[VIDXD_MAX_MSIX_ENTRIES];
+ struct irq_bypass_producer producer[VIDXD_MAX_MSIX_ENTRIES];
};
struct vdcm_idxd {
next prev parent reply other threads:[~2021-02-05 21:09 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-05 20:52 [PATCH v5 00/14] Add VFIO mediated device support and DEV-MSI support for the idxd driver Dave Jiang
2021-02-05 20:52 ` [PATCH v5 01/14] vfio/mdev: idxd: add theory of operation documentation for idxd mdev Dave Jiang
2021-02-05 20:53 ` [PATCH v5 02/14] dmaengine: idxd: add IMS detection in base driver Dave Jiang
2021-02-10 23:30 ` Jason Gunthorpe
2021-02-10 23:32 ` Dave Jiang
2021-02-05 20:53 ` [PATCH v5 03/14] dmaengine: idxd: add device support functions in prep for mdev Dave Jiang
2021-02-05 20:53 ` [PATCH v5 04/14] vfio/mdev: idxd: Add auxialary device plumbing for idxd mdev support Dave Jiang
2021-02-10 23:46 ` Jason Gunthorpe
2021-02-12 18:56 ` Dave Jiang
2021-02-12 19:14 ` Jason Gunthorpe
2021-02-05 20:53 ` [PATCH v5 05/14] vfio/mdev: idxd: add basic mdev registration and helper functions Dave Jiang
2021-02-10 23:59 ` Jason Gunthorpe
2021-02-16 19:04 ` Dave Jiang
2021-02-16 20:39 ` Dan Williams
2021-02-16 21:31 ` Jason Gunthorpe
2021-02-16 21:33 ` Jason Gunthorpe
2021-02-19 1:42 ` Tian, Kevin
2021-03-02 0:23 ` Dave Jiang
2021-03-02 0:29 ` Jason Gunthorpe
2021-03-02 0:48 ` Dave Jiang
2021-03-02 0:50 ` Jason Gunthorpe
2021-02-05 20:53 ` [PATCH v5 06/14] vfio/mdev: idxd: add mdev type as a new wq type Dave Jiang
2021-02-05 20:53 ` [PATCH v5 07/14] vfio/mdev: idxd: add 1dwq-v1 mdev type Dave Jiang
2021-02-11 0:00 ` Jason Gunthorpe
2021-02-05 20:53 ` [PATCH v5 08/14] vfio/mdev: idxd: add emulation rw routines Dave Jiang
2021-02-05 20:53 ` [PATCH v5 09/14] vfio/mdev: idxd: prep for virtual device commands Dave Jiang
2021-02-05 20:53 ` [PATCH v5 10/14] vfio/mdev: idxd: virtual device commands emulation Dave Jiang
2021-02-05 20:54 ` [PATCH v5 11/14] vfio/mdev: idxd: ims setup for the vdcm Dave Jiang
2021-02-05 20:54 ` Dave Jiang [this message]
2021-02-05 20:54 ` [PATCH v5 13/14] vfio/mdev: idxd: add new wq state for mdev Dave Jiang
2021-02-05 20:54 ` [PATCH v5 14/14] vfio/mdev: idxd: add error notification from host driver to mediated device Dave Jiang
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