From: Cornelia Huck <cohuck@redhat.com>
To: Kirti Wankhede <kwankhede@nvidia.com>
Cc: kevin.tian@intel.com, yi.l.liu@intel.com, cjia@nvidia.com,
kvm@vger.kernel.org, eskultet@redhat.com, ziye.yang@intel.com,
qemu-devel@nongnu.org, Zhengxiao.zx@Alibaba-inc.com,
shuangtai.tst@alibaba-inc.com, dgilbert@redhat.com,
zhi.a.wang@intel.com, mlevitsk@redhat.com, pasic@linux.ibm.com,
aik@ozlabs.ru, alex.williamson@redhat.com, eauger@redhat.com,
felipe@nutanix.com, jonathan.davies@nutanix.com,
yan.y.zhao@intel.com, changpeng.liu@intel.com, Ken.Xue@amd.com
Subject: Re: [PATCH Kernel v22 3/8] vfio iommu: Cache pgsize_bitmap in struct vfio_iommu
Date: Wed, 20 May 2020 12:08:25 +0200 [thread overview]
Message-ID: <20200520120825.7d8144ba.cohuck@redhat.com> (raw)
In-Reply-To: <1589781397-28368-4-git-send-email-kwankhede@nvidia.com>
On Mon, 18 May 2020 11:26:32 +0530
Kirti Wankhede <kwankhede@nvidia.com> wrote:
> Calculate and cache pgsize_bitmap when iommu->domain_list is updated
> and iommu->external_domain is set for mdev device.
> Add iommu->lock protection when cached pgsize_bitmap is accessed.
>
> Signed-off-by: Kirti Wankhede <kwankhede@nvidia.com>
> Reviewed-by: Neo Jia <cjia@nvidia.com>
> ---
> drivers/vfio/vfio_iommu_type1.c | 88 +++++++++++++++++++++++------------------
> 1 file changed, 49 insertions(+), 39 deletions(-)
>
(...)
> @@ -805,15 +806,14 @@ static void vfio_remove_dma(struct vfio_iommu *iommu, struct vfio_dma *dma)
> iommu->dma_avail++;
> }
>
> -static unsigned long vfio_pgsize_bitmap(struct vfio_iommu *iommu)
> +static void vfio_pgsize_bitmap(struct vfio_iommu *iommu)
Minor nit: I'd have renamed this function to
vfio_update_pgsize_bitmap().
> {
> struct vfio_domain *domain;
> - unsigned long bitmap = ULONG_MAX;
>
> - mutex_lock(&iommu->lock);
> + iommu->pgsize_bitmap = ULONG_MAX;
> +
> list_for_each_entry(domain, &iommu->domain_list, next)
> - bitmap &= domain->domain->pgsize_bitmap;
> - mutex_unlock(&iommu->lock);
> + iommu->pgsize_bitmap &= domain->domain->pgsize_bitmap;
>
> /*
> * In case the IOMMU supports page sizes smaller than PAGE_SIZE
(...)
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
next prev parent reply other threads:[~2020-05-20 10:09 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-18 5:56 [PATCH Kernel v22 0/8] Add UAPIs to support migration for VFIO devices Kirti Wankhede
2020-05-18 5:56 ` [PATCH Kernel v22 1/8] vfio: UAPI for migration interface for device state Kirti Wankhede
2020-05-18 5:56 ` [PATCH Kernel v22 2/8] vfio iommu: Remove atomicity of ref_count of pinned pages Kirti Wankhede
2020-05-18 5:56 ` [PATCH Kernel v22 3/8] vfio iommu: Cache pgsize_bitmap in struct vfio_iommu Kirti Wankhede
2020-05-20 10:08 ` Cornelia Huck [this message]
2020-05-20 14:46 ` Kirti Wankhede
2020-05-18 5:56 ` [PATCH Kernel v22 4/8] vfio iommu: Add ioctl definition for dirty pages tracking Kirti Wankhede
2020-05-18 5:56 ` [PATCH Kernel v22 5/8] vfio iommu: Implementation of ioctl " Kirti Wankhede
2020-05-18 21:53 ` Alex Williamson
2020-05-19 7:11 ` Kirti Wankhede
2020-05-19 6:52 ` Kirti Wankhede
2020-05-18 5:56 ` [PATCH Kernel v22 6/8] vfio iommu: Update UNMAP_DMA ioctl to get dirty bitmap before unmap Kirti Wankhede
2020-05-19 6:54 ` Kirti Wankhede
2020-05-20 10:27 ` Cornelia Huck
2020-05-20 15:16 ` Kirti Wankhede
2020-05-18 5:56 ` [PATCH Kernel v22 7/8] vfio iommu: Add migration capability to report supported features Kirti Wankhede
2020-05-20 10:42 ` Cornelia Huck
2020-05-20 15:23 ` Kirti Wankhede
2020-05-18 5:56 ` [PATCH Kernel v22 8/8] vfio: Selective dirty page tracking if IOMMU backed device pins pages Kirti Wankhede
2020-05-19 6:54 ` Kirti Wankhede
2020-05-19 16:58 ` [PATCH Kernel v22 0/8] Add UAPIs to support migration for VFIO devices Alex Williamson
2020-05-20 2:55 ` Yan Zhao
2020-05-20 13:40 ` Kirti Wankhede
2020-05-20 16:46 ` Alex Williamson
2020-05-21 5:08 ` Yan Zhao
2020-05-21 7:09 ` Kirti Wankhede
2020-05-21 7:04 ` Yan Zhao
2020-05-21 7:28 ` Kirti Wankhede
2020-05-21 7:32 ` Kirti Wankhede
2020-05-25 6:59 ` Yan Zhao
2020-05-25 13:20 ` Kirti Wankhede
2020-05-26 20:19 ` Alex Williamson
2020-05-27 6:23 ` Yan Zhao
2020-05-27 8:48 ` Dr. David Alan Gilbert
2020-05-28 8:01 ` Yan Zhao
2020-05-28 22:53 ` Alex Williamson
2020-05-29 11:12 ` Dr. David Alan Gilbert
2020-05-28 22:59 ` Alex Williamson
2020-05-29 4:15 ` Yan Zhao
2020-05-29 17:57 ` Kirti Wankhede
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