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| author | Thomas Zimmermann <tzimmermann@suse.de> | 2023-11-27 14:15:58 +0100 |
|---|---|---|
| committer | Thomas Zimmermann <tzimmermann@suse.de> | 2023-11-29 12:20:44 +0100 |
| commit | 76f92201b821dd2f442ebe37ec9b52b525855bac (patch) | |
| tree | 156abcd154eb74b08493323ecfdeca50b40daa76 /drivers/video/fbdev/core/fb_chrdev.c | |
| parent | 23dad7b95fea68426311405a0627b90c06c3fc34 (diff) | |
| download | linux-stable-76f92201b821dd2f442ebe37ec9b52b525855bac.tar.gz linux-stable-76f92201b821dd2f442ebe37ec9b52b525855bac.tar.bz2 linux-stable-76f92201b821dd2f442ebe37ec9b52b525855bac.zip | |
fbdev: Push pgprot_decrypted() into mmap implementations
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@suse.de>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231127131655.4020-30-tzimmermann@suse.de
Diffstat (limited to 'drivers/video/fbdev/core/fb_chrdev.c')
| -rw-r--r-- | drivers/video/fbdev/core/fb_chrdev.c | 5 |
1 files changed, 0 insertions, 5 deletions
diff --git a/drivers/video/fbdev/core/fb_chrdev.c b/drivers/video/fbdev/core/fb_chrdev.c index 32a7315b4b6d..b73a122950a9 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; |