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39 lines
1.5 KiB
Diff
39 lines
1.5 KiB
Diff
From 41a18521d40ed19c2e22d8e41cc427d18f082b71 Mon Sep 17 00:00:00 2001
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From: Diana Craciun <diana.craciun@nxp.com>
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Date: Mon, 18 Nov 2019 16:32:08 +0200
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Subject: [PATCH] vfio/fsl-mc: Map the VFIO region according to the flags
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received from mc firmware
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There are some VFIO regions which are cacheable (QMAN CENA region).
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These regions should be mapped cacheable.
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Signed-off-by: Diana Craciun <diana.craciun@nxp.com>
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---
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drivers/vfio/fsl-mc/vfio_fsl_mc.c | 8 +++++++-
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1 file changed, 7 insertions(+), 1 deletion(-)
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--- a/drivers/vfio/fsl-mc/vfio_fsl_mc.c
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+++ b/drivers/vfio/fsl-mc/vfio_fsl_mc.c
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@@ -106,6 +106,7 @@ static int vfio_fsl_mc_regions_init(stru
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vdev->regions[i].flags |= VFIO_REGION_INFO_FLAG_READ;
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if (!(mc_dev->regions[i].flags & IORESOURCE_READONLY))
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vdev->regions[i].flags |= VFIO_REGION_INFO_FLAG_WRITE;
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+ vdev->regions[i].type = mc_dev->regions[i].flags & IORESOURCE_BITS;
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}
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vdev->num_regions = mc_dev->obj_desc.region_count;
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@@ -451,7 +452,12 @@ static int vfio_fsl_mc_mmap_mmio(struct
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if (region.size < PAGE_SIZE || base + size > region.size)
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return -EINVAL;
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- vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
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+ if (region.type & DPRC_REGION_CACHEABLE) {
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+ if (!(region.type & DPRC_REGION_SHAREABLE))
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+ vma->vm_page_prot = pgprot_cached_ns(vma->vm_page_prot);
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+ } else
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+ vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
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+
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vma->vm_pgoff = (region.addr >> PAGE_SHIFT) + pgoff;
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return remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
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