If a driver sets struct fb_ops.fb_mmap, the fbdev core automatically
calls pgprot_decrypted(). But the default fb_mmap code doesn't handle
pgprot_decrypted().
Move the call to pgprot_decrypted() into each drivers' fb_mmap function.
This only concerns fb_mmap functions for system and DMA memory. For
I/O memory, which is the default case, nothing changes. The fb_mmap
for I/O-memory can later be moved into a helper as well.
DRM's fbdev emulation handles pgprot_decrypted() internally via the
Prime helpers. Fbdev doesn't have to do anything in this case. In
cases where DRM uses deferred I/O, this patch updates fb_mmap correctly.
Signed-off-by: Thomas Zimmermann <tzimmermann@xxxxxxx>
---
drivers/auxdisplay/cfag12864bfb.c | 2 ++
drivers/auxdisplay/ht16k33.c | 2 ++
drivers/video/fbdev/amba-clcd.c | 2 ++
drivers/video/fbdev/au1100fb.c | 2 ++
drivers/video/fbdev/au1200fb.c | 2 ++
drivers/video/fbdev/core/fb_chrdev.c | 5 -----
drivers/video/fbdev/core/fb_defio.c | 2 ++
drivers/video/fbdev/ep93xx-fb.c | 2 ++
drivers/video/fbdev/gbefb.c | 2 ++
drivers/video/fbdev/omap/omapfb_main.c | 2 ++
drivers/video/fbdev/omap2/omapfb/omapfb-main.c | 2 ++
drivers/video/fbdev/ps3fb.c | 2 ++
drivers/video/fbdev/sa1100fb.c | 2 ++
drivers/video/fbdev/sbuslib.c | 1 +
drivers/video/fbdev/sh_mobile_lcdcfb.c | 4 ++++
drivers/video/fbdev/smscufx.c | 2 ++
drivers/video/fbdev/udlfb.c | 2 ++
drivers/video/fbdev/vermilion/vermilion.c | 2 ++
drivers/video/fbdev/vfb.c | 2 ++
19 files changed, 37 insertions(+), 5 deletions(-)
diff --git a/drivers/auxdisplay/cfag12864bfb.c b/drivers/auxdisplay/cfag12864bfb.c
index ede0f9a513110..5ba19c339f088 100644
--- a/drivers/auxdisplay/cfag12864bfb.c
+++ b/drivers/auxdisplay/cfag12864bfb.c
@@ -51,6 +51,8 @@ static int cfag12864bfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
{
struct page *pages = virt_to_page(cfag12864b_buffer);
+ vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot);
+
return vm_map_pages_zero(vma, &pages, 1);
}
diff --git a/drivers/auxdisplay/ht16k33.c b/drivers/auxdisplay/ht16k33.c
index 2f1dc6b4e2765..a90430b7d07ba 100644
--- a/drivers/auxdisplay/ht16k33.c
+++ b/drivers/auxdisplay/ht16k33.c
@@ -351,6 +351,8 @@ static int ht16k33_mmap(struct fb_info *info, struct vm_area_struct *vma)
struct ht16k33_priv *priv = info->par;
struct page *pages = virt_to_page(priv->fbdev.buffer);
+ vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot);
+
return vm_map_pages_zero(vma, &pages, 1);
}
diff --git a/drivers/video/fbdev/amba-clcd.c b/drivers/video/fbdev/amba-clcd.c
index 0399db369e709..47d373f04f3f0 100644
--- a/drivers/video/fbdev/amba-clcd.c
+++ b/drivers/video/fbdev/amba-clcd.c
@@ -829,6 +829,8 @@ static int clcdfb_of_dma_setup(struct clcd_fb *fb)
static int clcdfb_of_dma_mmap(struct clcd_fb *fb, struct vm_area_struct *vma)
{
+ vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot);
+
return dma_mmap_wc(&fb->dev->dev, vma, fb->fb.screen_base,
fb->fb.fix.smem_start, fb->fb.fix.smem_len);
}
diff --git a/drivers/video/fbdev/au1100fb.c b/drivers/video/fbdev/au1100fb.c
index a9c8d33a6ef71..08109ce535cd4 100644
--- a/drivers/video/fbdev/au1100fb.c
+++ b/drivers/video/fbdev/au1100fb.c
@@ -342,6 +342,8 @@ int au1100fb_fb_mmap(struct fb_info *fbi, struct vm_area_struct *vma)
{
struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
+ vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot);
+
pgprot_val(vma->vm_page_prot) |= (6 << 9); //CCA=6
return dma_mmap_coherent(fbdev->dev, vma, fbdev->fb_mem, fbdev->fb_phys,
diff --git a/drivers/video/fbdev/au1200fb.c b/drivers/video/fbdev/au1200fb.c
index 16ebbab500972..6f20efc663d7e 100644
--- a/drivers/video/fbdev/au1200fb.c
+++ b/drivers/video/fbdev/au1200fb.c
@@ -1236,6 +1236,8 @@ static int au1200fb_fb_mmap(struct fb_info *info, struct vm_area_struct *vma)
{
struct au1200fb_device *fbdev = info->par;
+ vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot);
+
return dma_mmap_coherent(fbdev->dev, vma,
fbdev->fb_mem, fbdev->fb_phys, fbdev->fb_len);
}
diff --git a/drivers/video/fbdev/core/fb_chrdev.c b/drivers/video/fbdev/core/fb_chrdev.c
index 32a7315b4b6dd..b73a122950a94 100644
--- a/drivers/video/fbdev/core/fb_chrdev.c
+++ b/drivers/video/fbdev/core/fb_chrdev.c
@@ -325,11 +325,6 @@ static int fb_mmap(struct file *file, struct vm_area_struct *vma)
if (info->fbops->fb_mmap) {
int res;
- /*
- * The framebuffer needs to be accessed decrypted, be sure
- * SME protection is removed ahead of the call
- */
- vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot);
res = info->fbops->fb_mmap(info, vma);
mutex_unlock(&info->mm_lock);
return res;
diff --git a/drivers/video/fbdev/core/fb_defio.c b/drivers/video/fbdev/core/fb_defio.c
index 274f5d0fa2471..1b0b85e59e5e1 100644
--- a/drivers/video/fbdev/core/fb_defio.c
+++ b/drivers/video/fbdev/core/fb_defio.c
@@ -227,6 +227,8 @@ static const struct address_space_operations fb_deferred_io_aops = {
int fb_deferred_io_mmap(struct fb_info *info, struct vm_area_struct *vma)
{
+ vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot);
+
vma->vm_ops = &fb_deferred_io_vm_ops;
vm_flags_set(vma, VM_DONTEXPAND | VM_DONTDUMP);
if (!(info->flags & FBINFO_VIRTFB))
diff --git a/drivers/video/fbdev/ep93xx-fb.c b/drivers/video/fbdev/ep93xx-fb.c
index cae00deee0014..3e378874ccc79 100644
--- a/drivers/video/fbdev/ep93xx-fb.c
+++ b/drivers/video/fbdev/ep93xx-fb.c
@@ -311,6 +311,8 @@ static int ep93xxfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
{
unsigned int offset = vma->vm_pgoff << PAGE_SHIFT;
+ vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot);
+
if (offset < info->fix.smem_len) {
return dma_mmap_wc(info->device, vma, info->screen_base,
info->fix.smem_start, info->fix.smem_len);
diff --git a/drivers/video/fbdev/gbefb.c b/drivers/video/fbdev/gbefb.c
index e89e5579258ef..8463de833d1e1 100644
--- a/drivers/video/fbdev/gbefb.c
+++ b/drivers/video/fbdev/gbefb.c
@@ -1000,6 +1000,8 @@ static int gbefb_mmap(struct fb_info *info,
unsigned long phys_addr, phys_size;
u16 *tile;
+ vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot);
+
/* check range */
if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
return -EINVAL;
diff --git a/drivers/video/fbdev/omap/omapfb_main.c b/drivers/video/fbdev/omap/omapfb_main.c
index 42c96f1cfc93c..e35c8dbc5a535 100644
--- a/drivers/video/fbdev/omap/omapfb_main.c
+++ b/drivers/video/fbdev/omap/omapfb_main.c
@@ -1203,6 +1203,8 @@ static int omapfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
struct omapfb_device *fbdev = plane->fbdev;
int r;
+ vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot);
+
omapfb_rqueue_lock(fbdev);
r = fbdev->ctrl->mmap(info, vma);
omapfb_rqueue_unlock(fbdev);
diff --git a/drivers/video/fbdev/omap2/omapfb/omapfb-main.c b/drivers/video/fbdev/omap2/omapfb/omapfb-main.c
index c9fd0ad352d7f..0db9c55fce5a2 100644
--- a/drivers/video/fbdev/omap2/omapfb/omapfb-main.c
+++ b/drivers/video/fbdev/omap2/omapfb/omapfb-main.c
@@ -1095,6 +1095,8 @@ static int omapfb_mmap(struct fb_info *fbi, struct vm_area_struct *vma)
u32 len;
int r;
+ vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot);
+
rg = omapfb_get_mem_region(ofbi->region);
start = omapfb_get_region_paddr(ofbi);
diff --git a/drivers/video/fbdev/ps3fb.c b/drivers/video/fbdev/ps3fb.c
index de8d78bf070a0..dbcda307f6a67 100644
--- a/drivers/video/fbdev/ps3fb.c
+++ b/drivers/video/fbdev/ps3fb.c
@@ -708,6 +708,8 @@ static int ps3fb_mmap(struct fb_info *info, struct vm_area_struct *vma)
{
int r;
+ vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot);
+
r = vm_iomap_memory(vma, info->fix.smem_start, info->fix.smem_len);
dev_dbg(info->device, "ps3fb: mmap framebuffer P(%lx)->V(%lx)\n",
diff --git a/drivers/video/fbdev/sa1100fb.c b/drivers/video/fbdev/sa1100fb.c
index befd3fe2f6596..0d362d2bf0e38 100644
--- a/drivers/video/fbdev/sa1100fb.c
+++ b/drivers/video/fbdev/sa1100fb.c
@@ -562,6 +562,8 @@ static int sa1100fb_mmap(struct fb_info *info,
container_of(info, struct sa1100fb_info, fb);
unsigned long off = vma->vm_pgoff << PAGE_SHIFT;
+ vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot);
+
if (off < info->fix.smem_len) {
vma->vm_pgoff += 1; /* skip over the palette */
return dma_mmap_wc(fbi->dev, vma, fbi->map_cpu, fbi->map_dma,
diff --git a/drivers/video/fbdev/sbuslib.c b/drivers/video/fbdev/sbuslib.c
index 4d524db5c4f26..634e3d159452c 100644
--- a/drivers/video/fbdev/sbuslib.c
+++ b/drivers/video/fbdev/sbuslib.c
@@ -60,6 +60,7 @@ int sbusfb_mmap_helper(struct sbus_mmap_map *map,
/* VM_IO | VM_DONTEXPAND | VM_DONTDUMP are set by remap_pfn_range() */
+ vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot);
vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
/* Each page, see which map applies */
diff --git a/drivers/video/fbdev/sh_mobile_lcdcfb.c b/drivers/video/fbdev/sh_mobile_lcdcfb.c
index d84628de51893..eb2297b37504c 100644
--- a/drivers/video/fbdev/sh_mobile_lcdcfb.c
+++ b/drivers/video/fbdev/sh_mobile_lcdcfb.c
@@ -1482,6 +1482,8 @@ sh_mobile_lcdc_overlay_mmap(struct fb_info *info, struct vm_area_struct *vma)
if (info->fbdefio)
return fb_deferred_io_mmap(info, vma);
+ vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot);
+
return dma_mmap_coherent(ovl->channel->lcdc->dev, vma, ovl->fb_mem,
ovl->dma_handle, ovl->fb_size);
}
@@ -1956,6 +1958,8 @@ sh_mobile_lcdc_mmap(struct fb_info *info, struct vm_area_struct *vma)
if (info->fbdefio)
return fb_deferred_io_mmap(info, vma);
+ vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot);
+
return dma_mmap_coherent(ch->lcdc->dev, vma, ch->fb_mem,
ch->dma_handle, ch->fb_size);
}
diff --git a/drivers/video/fbdev/smscufx.c b/drivers/video/fbdev/smscufx.c
index 90a77d19b236b..35d682b110c42 100644
--- a/drivers/video/fbdev/smscufx.c
+++ b/drivers/video/fbdev/smscufx.c
@@ -783,6 +783,8 @@ static int ufx_ops_mmap(struct fb_info *info, struct vm_area_struct *vma)
if (info->fbdefio)
return fb_deferred_io_mmap(info, vma);
+ vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot);
+
if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
return -EINVAL;
if (size > info->fix.smem_len)
diff --git a/drivers/video/fbdev/udlfb.c b/drivers/video/fbdev/udlfb.c
index 2460ff4ac86b4..1514ddac4cafc 100644
--- a/drivers/video/fbdev/udlfb.c
+++ b/drivers/video/fbdev/udlfb.c
@@ -331,6 +331,8 @@ static int dlfb_ops_mmap(struct fb_info *info, struct vm_area_struct *vma)
if (info->fbdefio)
return fb_deferred_io_mmap(info, vma);
+ vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot);
+
if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
return -EINVAL;
if (size > info->fix.smem_len)
diff --git a/drivers/video/fbdev/vermilion/vermilion.c b/drivers/video/fbdev/vermilion/vermilion.c
index 840ead69654b8..a087b42ca652f 100644
--- a/drivers/video/fbdev/vermilion/vermilion.c
+++ b/drivers/video/fbdev/vermilion/vermilion.c
@@ -998,6 +998,8 @@ static int vmlfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
int ret;
unsigned long prot;
+ vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot);
+
ret = vmlfb_vram_offset(vinfo, offset);
if (ret)
return -EINVAL;
diff --git a/drivers/video/fbdev/vfb.c b/drivers/video/fbdev/vfb.c
index f6140f247e4b0..f86149ba38352 100644
--- a/drivers/video/fbdev/vfb.c
+++ b/drivers/video/fbdev/vfb.c
@@ -382,6 +382,8 @@ static int vfb_pan_display(struct fb_var_screeninfo *var,
static int vfb_mmap(struct fb_info *info,
struct vm_area_struct *vma)
{
+ vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot);
+
return remap_vmalloc_range(vma, (void *)info->fix.smem_start, vma->vm_pgoff);
}
--
2.42.0
