From: Steve Sistare <steven.sistare@oracle.com>
To: kvm@vger.kernel.org
Cc: Alex Williamson <alex.williamson@redhat.com>,
Cornelia Huck <cohuck@redhat.com>,
Kirti Wankhede <kwankhede@nvidia.com>,
Steve Sistare <steven.sistare@oracle.com>
Subject: [PATCH V2 4/9] vfio/type1: implement unmap all
Date: Tue, 19 Jan 2021 09:48:24 -0800 [thread overview]
Message-ID: <1611078509-181959-5-git-send-email-steven.sistare@oracle.com> (raw)
In-Reply-To: <1611078509-181959-1-git-send-email-steven.sistare@oracle.com>
Implement VFIO_DMA_UNMAP_FLAG_ALL.
Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
---
drivers/vfio/vfio_iommu_type1.c | 22 +++++++++++++++++-----
1 file changed, 17 insertions(+), 5 deletions(-)
diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c
index c687174..ef83018 100644
--- a/drivers/vfio/vfio_iommu_type1.c
+++ b/drivers/vfio/vfio_iommu_type1.c
@@ -1100,6 +1100,7 @@ static int vfio_dma_do_unmap(struct vfio_iommu *iommu,
unsigned long pgshift;
dma_addr_t iova = unmap->iova;
unsigned long size = unmap->size;
+ bool unmap_all = !!(unmap->flags & VFIO_DMA_UNMAP_FLAG_ALL);
mutex_lock(&iommu->lock);
@@ -1109,8 +1110,13 @@ static int vfio_dma_do_unmap(struct vfio_iommu *iommu,
if (iova & (pgsize - 1))
goto unlock;
- if (!size || size & (pgsize - 1))
+ if (unmap_all) {
+ if (iova || size)
+ goto unlock;
+ size = SIZE_MAX;
+ } else if (!size || size & (pgsize - 1)) {
goto unlock;
+ }
if (iova + size - 1 < iova || size > SIZE_MAX)
goto unlock;
@@ -1154,7 +1160,7 @@ static int vfio_dma_do_unmap(struct vfio_iommu *iommu,
* will only return success and a size of zero if there were no
* mappings within the range.
*/
- if (iommu->v2) {
+ if (iommu->v2 && !unmap_all) {
dma = vfio_find_dma(iommu, iova, 1);
if (dma && dma->iova != iova)
goto unlock;
@@ -1165,7 +1171,7 @@ static int vfio_dma_do_unmap(struct vfio_iommu *iommu,
}
ret = 0;
- while ((dma = vfio_find_dma(iommu, iova, size))) {
+ while ((dma = vfio_find_dma_first(iommu, iova, size))) {
if (!iommu->v2 && iova > dma->iova)
break;
/*
@@ -2538,6 +2544,7 @@ static int vfio_iommu_type1_check_extension(struct vfio_iommu *iommu,
case VFIO_TYPE1_IOMMU:
case VFIO_TYPE1v2_IOMMU:
case VFIO_TYPE1_NESTING_IOMMU:
+ case VFIO_UNMAP_ALL:
return 1;
case VFIO_DMA_CC_IOMMU:
if (!iommu)
@@ -2710,6 +2717,8 @@ static int vfio_iommu_type1_unmap_dma(struct vfio_iommu *iommu,
{
struct vfio_iommu_type1_dma_unmap unmap;
struct vfio_bitmap bitmap = { 0 };
+ uint32_t mask = VFIO_DMA_UNMAP_FLAG_GET_DIRTY_BITMAP |
+ VFIO_DMA_UNMAP_FLAG_ALL;
unsigned long minsz;
int ret;
@@ -2718,8 +2727,11 @@ static int vfio_iommu_type1_unmap_dma(struct vfio_iommu *iommu,
if (copy_from_user(&unmap, (void __user *)arg, minsz))
return -EFAULT;
- if (unmap.argsz < minsz ||
- unmap.flags & ~VFIO_DMA_UNMAP_FLAG_GET_DIRTY_BITMAP)
+ if (unmap.argsz < minsz || unmap.flags & ~mask)
+ return -EINVAL;
+
+ if ((unmap.flags & VFIO_DMA_UNMAP_FLAG_GET_DIRTY_BITMAP) &&
+ (unmap.flags & ~VFIO_DMA_UNMAP_FLAG_GET_DIRTY_BITMAP))
return -EINVAL;
if (unmap.flags & VFIO_DMA_UNMAP_FLAG_GET_DIRTY_BITMAP) {
--
1.8.3.1
next prev parent reply other threads:[~2021-01-19 18:29 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-19 17:48 [PATCH V2 0/9] vfio virtual address update Steve Sistare
2021-01-19 17:48 ` [PATCH V2 1/9] vfio: option to unmap all Steve Sistare
2021-01-19 17:48 ` [PATCH V2 2/9] vfio/type1: find first dma Steve Sistare
2021-01-19 17:48 ` [PATCH V2 3/9] vfio/type1: unmap cleanup Steve Sistare
2021-01-19 17:48 ` Steve Sistare [this message]
2021-01-22 21:22 ` [PATCH V2 4/9] vfio/type1: implement unmap all Alex Williamson
2021-01-27 23:07 ` Steven Sistare
2021-01-19 17:48 ` [PATCH V2 5/9] vfio: interfaces to update vaddr Steve Sistare
2021-01-19 17:48 ` [PATCH V2 6/9] vfio/type1: implement " Steve Sistare
2021-01-22 21:48 ` Alex Williamson
2021-01-27 23:23 ` Steven Sistare
2021-01-19 17:48 ` [PATCH V2 7/9] vfio: iommu driver notify callback Steve Sistare
2021-01-19 17:48 ` [PATCH V2 8/9] vfio/type1: implement " Steve Sistare
2021-01-22 23:00 ` Alex Williamson
2021-01-27 23:24 ` Steven Sistare
2021-01-19 17:48 ` [PATCH V2 9/9] vfio/type1: block on invalid vaddr Steve Sistare
2021-01-22 22:59 ` Alex Williamson
2021-01-27 23:25 ` Steven Sistare
2021-01-28 0:03 ` Alex Williamson
2021-01-28 17:07 ` Alex Williamson
2021-01-28 17:18 ` Steven Sistare
[not found] ` <55725169-de0d-4019-f96c-ded20dfde0d7@oracle.com>
2021-01-29 17:05 ` [PATCH V2 0/9] vfio virtual address update Alex Williamson
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