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linux/drivers/video/fbdev
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Ard Biesheuvel f8585539df fbdev/efifb: Ignore framebuffer memmap entries that lack any memory types 
The following commit:

  38ac0287b7 ("fbdev/efifb: Honour UEFI memory map attributes when mapping the FB")

updated the EFI framebuffer code to use memory mappings for the linear
framebuffer that are permitted by the memory attributes described by the
EFI memory map for the particular region, if the framebuffer happens to
be covered by the EFI memory map (which is typically only the case for
framebuffers in shared memory). This is required since non-x86 systems
may require cacheable attributes for memory mappings that are shared
with other masters (such as GPUs), and this information cannot be
described by the Graphics Output Protocol (GOP) EFI protocol itself,
and so we rely on the EFI memory map for this.

As reported by James, this breaks some x86 systems:

  [ 1.173368] efifb: probing for efifb
  [ 1.173386] efifb: abort, cannot remap video memory 0x1d5000 @ 0xcf800000
  [ 1.173395] Trying to free nonexistent resource <00000000cf800000-00000000cf9d4bff>
  [ 1.173413] efi-framebuffer: probe of efi-framebuffer.0 failed with error -5

The problem turns out to be that the memory map entry that describes the
framebuffer has no memory attributes listed at all, and so we end up with
a mem_flags value of 0x0.

So work around this by ensuring that the memory map entry's attribute field
has a sane value before using it to mask the set of usable attributes.

Reported-by: James Hilliard <james.hilliard1@gmail.com>
Tested-by: James Hilliard <james.hilliard1@gmail.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: <stable@vger.kernel.org> # v4.19+
Cc: Borislav Petkov <bp@alien8.de>
Cc: James Morse <james.morse@arm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Matt Fleming <matt@codeblueprint.co.uk>
Cc: Peter Jones <pjones@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-efi@vger.kernel.org
Fixes: 38ac0287b7 ("fbdev/efifb: Honour UEFI memory map attributes when ...")
Link: http://lkml.kernel.org/r/20190516213159.3530-2-ard.biesheuvel@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
 		2019-05-17 11:07:42 +02:00
..
aty fbdev: Use of_node_name_eq for node name comparisons 2019-02-08 19:24:45 +01:00
core fbcon: Don't reset logo_shown when logo is currently shown 2019-05-06 15:57:47 +02:00
geode video: fbdev: geode: remove ifdef OLPC noise 2019-02-08 19:24:46 +01:00
i810 License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
intelfb video: fbdev: intelfb: deprecate pci_get_bus_and_slot() 2018-01-17 08:16:46 -06:00
kyro video: fbdev: kyro: constify pci_device_id. 2017-08-01 17:20:42 +02:00
matrox powerpc, fbdev: Use NV_CMODE and NV_VMODE only when CONFIG_PPC32 && CONFIG_PPC_PMAC && CONFIG_NVRAM 2019-01-22 10:21:45 +01:00
mb862xx treewide: kmalloc() -> kmalloc_array() 2018-06-12 16:19:22 -07:00
mbx fbdev: mbx: fix a misspelled variable name 2019-03-05 12:36:33 +01:00
mmp drivers: video: fbdev: Kconfig: pedantic cleanups 2019-04-01 17:46:57 +02:00
nvidia fbdev changes for v4.18: 2018-06-17 05:00:24 +09:00
omap drivers: video: fbdev: Kconfig: pedantic cleanups 2019-04-01 17:46:57 +02:00
omap2 drivers: video: fbdev: Kconfig: pedantic cleanups 2019-04-01 17:46:57 +02:00
riva treewide: kmalloc() -> kmalloc_array() 2018-06-12 16:19:22 -07:00
savage video: fbdev: savage: fix indentation issue 2019-04-01 17:46:54 +02:00
sis video: fbdev: sis: Remove unnecessary parentheses and commented code 2018-10-08 12:57:36 +02:00
vermilion video: fbdev: vermilion: use 64-bit arithmetic instead of 32-bit 2018-03-12 17:06:54 +01:00
via fbdev/via: fix spelling mistake "Expandsion" -> "Expansion" 2019-02-08 19:24:44 +01:00
68328fb.c video: fbdev: annotate fb_fix_screeninfo with const and __initconst 2017-09-04 16:00:49 +02:00
Kconfig - Fix-ups 2019-05-14 10:45:03 -07:00
Makefile video: amba-clcd: Decomission Versatile and Nomadik 2019-04-11 19:25:12 +02:00
acornfb.c drivers/video/fbdev: Fixing coding guidelines in acornfb.c 2017-04-07 17:03:24 +02:00
acornfb.h
…
amba-clcd.c video: amba-clcd: Decomission Versatile and Nomadik 2019-04-11 19:25:12 +02:00
amifb.c Remove 'type' argument from access_ok() function 2019-01-03 18:57:57 -08:00
arcfb.c video: fbdev: arcfb: mark expected switch fall-through 2018-10-08 12:57:37 +02:00
arkfb.c video: fbdev: arkfb: constify pci_device_id. 2017-08-01 17:20:42 +02:00
asiliantfb.c video: fbdev: asiliantfb: constify pci_device_id. 2017-08-01 17:20:41 +02:00
atafb.c fbdev: atafb: Modernize printing of kernel messages 2019-04-01 17:46:55 +02:00
atafb.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
atafb_iplan2p2.c fbdev: atafb: Remove obsolete module support 2019-04-01 17:46:55 +02:00
atafb_iplan2p4.c fbdev: atafb: Remove obsolete module support 2019-04-01 17:46:55 +02:00
atafb_iplan2p8.c fbdev: atafb: Remove obsolete module support 2019-04-01 17:46:55 +02:00
atafb_mfb.c fbdev: atafb: Remove obsolete module support 2019-04-01 17:46:55 +02:00
atafb_utils.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
atmel_lcdfb.c video: fbdev: atmel_lcdfb: remove set but not used variable 'pdata' 2019-04-11 19:25:12 +02:00
au1100fb.c fbdev changes for v4.18: 2018-06-17 05:00:24 +09:00
au1100fb.h
…
au1200fb.c video: fbdev: fix spelling mistake: "frambuffer" -> "framebuffer" 2018-05-15 12:41:11 +02:00
au1200fb.h fbdev: au1200fb: delete duplicate header contents 2018-01-04 16:53:49 +01:00
broadsheetfb.c treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
bt431.h
…
bt455.h
…
bw2.c video: fbdev: Convert to using %pOF instead of full_name 2017-08-07 17:22:13 +02:00
c2p.h
…
c2p_core.h
…
c2p_iplan2.c
…
c2p_planar.c
…
carminefb.c
…
carminefb.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
carminefb_regs.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
cg3.c fbdev: Use of_node_name_eq for node name comparisons 2019-02-08 19:24:45 +01:00
cg6.c video: fbdev: Convert to using %pOF instead of full_name 2017-08-07 17:22:13 +02:00
cg14.c fbdev: Use of_node_name_eq for node name comparisons 2019-02-08 19:24:45 +01:00
chipsfb.c fbdev: chipsfb: remove set but not used variable 'size' 2019-02-08 19:24:45 +01:00
cirrusfb.c video: fbdev: cirrusfb: mark expected switch fall-throughs 2017-11-09 18:09:32 +01:00
clps711x-fb.c video: clps711x-fb: release disp device node in probe() 2018-12-20 19:13:07 +01:00
cobalt_lcdfb.c video: cobalt_lcdfb: constify fb_fix_screeninfo structure 2017-08-01 17:20:39 +02:00
controlfb.c powerpc, fbdev: Use NV_CMODE and NV_VMODE only when CONFIG_PPC32 && CONFIG_PPC_PMAC && CONFIG_NVRAM 2019-01-22 10:21:45 +01:00
controlfb.h fbdev: controlfb: Add missing modes to fix out of bounds access 2017-11-09 18:09:33 +01:00
cyber2000fb.c video: fbdev: make fb_videomode const 2017-09-04 16:00:49 +02:00
cyber2000fb.h
…
da8xx-fb.c da8xx-fb: pass struct device to DMA API functions 2019-04-08 17:52:24 +02:00
dnfb.c video/fbdev/dnfb: Use common error handling code in dnfb_probe() 2017-11-09 18:09:31 +01:00
edid.h
…
efifb.c fbdev/efifb: Ignore framebuffer memmap entries that lack any memory types 2019-05-17 11:07:42 +02:00
ep93xx-fb.c
…
fb-puv3.c treewide: replace #include <asm/sizes.h> with #include <linux/sizes.h> 2019-05-14 19:52:52 -07:00
ffb.c fbdev: Use of_node_name_eq for node name comparisons 2019-02-08 19:24:45 +01:00
fm2fb.c video: fm2fb: constify zorro_device_id 2017-09-04 16:00:49 +02:00
fsl-diu-fb.c fbdev: fsl-diu: remove redundant null check on cmap 2018-12-20 19:13:08 +01:00
g364fb.c
…
gbefb.c gbefb: switch to managed version of the DMA allocator 2019-04-08 17:52:29 +02:00
goldfishfb.c video: goldfishfb: fix memory leak on driver remove 2018-07-24 19:11:27 +02:00
grvga.c video: fbdev: annotate fb_fix_screeninfo with const and __initconst 2017-09-04 16:00:49 +02:00
gxt4500.c
…
hecubafb.c
…
hgafb.c video: hgafb: fix potential NULL pointer dereference 2019-04-01 17:46:58 +02:00
hitfb.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
hpfb.c hpfb: use probe_kernel_read() 2017-05-27 15:41:17 -04:00
hyperv_fb.c use the new async probing feature for the hyperv drivers 2018-07-03 13:02:28 +02:00
i740_reg.h
…
i740fb.c video: fbdev: mark expected switch fall-throughs 2018-07-24 19:11:28 +02:00
imsttfb.c video: imsttfb: fix potential NULL pointer dereferences 2019-04-01 17:46:58 +02:00
imxfb.c treewide: kmalloc() -> kmalloc_array() 2018-06-12 16:19:22 -07:00
jz4740_fb.c fbdev: jz4740-fb: Let the pinctrl driver configure the pins 2017-05-22 17:22:06 +02:00
leo.c fbdev: Convert to using %pOFn instead of device_node.name 2018-10-08 12:57:36 +02:00
macfb.c video/macfb: Always initialize DAFB colour table pointer register 2019-04-01 17:46:55 +02:00
macmodes.c
…
macmodes.h
…
maxinefb.c video: fbdev: make fb_var_screeninfo const 2017-09-04 16:00:50 +02:00
metronomefb.c video: fbdev: metronomefb: fix some off by one bugs 2018-07-24 19:11:26 +02:00
mx3fb.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
mxsfb.c video: fbdev: mxsfb: remove set but not used variable 'line_count' 2019-04-11 19:25:12 +02:00
n411.c Annotate hardware config module parameters in drivers/video/ 2017-04-20 12:02:32 +01:00
neofb.c video: fbdev: neofb: constify pci_device_id. 2017-08-01 17:20:44 +02:00
nuc900fb.c video: fbdev: Use dev_get_drvdata() 2019-05-06 15:57:47 +02:00
nuc900fb.h
…
ocfb.c
…
offb.c video: offb: annotate implicit fall throughs 2019-02-08 19:24:46 +01:00
p9100.c fbdev: Convert to using %pOFn instead of device_node.name 2018-10-08 12:57:36 +02:00
platinumfb.c powerpc, fbdev: Use NV_CMODE and NV_VMODE only when CONFIG_PPC32 && CONFIG_PPC_PMAC && CONFIG_NVRAM 2019-01-22 10:21:45 +01:00
platinumfb.h
…
pm2fb.c video: fbdev: mark expected switch fall-throughs 2018-07-24 19:11:28 +02:00
pm3fb.c video: fbdev: pm3fb: constify pci_device_id. 2017-08-01 17:20:45 +02:00
pmag-aa-fb.c video: fbdev: make fb_var_screeninfo const 2017-09-04 16:00:50 +02:00
pmag-ba-fb.c video: fbdev: make fb_var_screeninfo const 2017-09-04 16:00:50 +02:00
pmagb-b-fb.c video: fbdev: make fb_var_screeninfo const 2017-09-04 16:00:50 +02:00
ps3fb.c video: fbdev: annotate fb_fix_screeninfo with const and __initconst 2017-09-04 16:00:49 +02:00
pvr2fb.c mm/gup: change GUP fast to use flags rather than a write 'bool' 2019-05-14 09:47:46 -07:00
pxa3xx-gcu.c pxa3xx-gcu: pass struct device to dma_mmap_coherent 2019-04-08 17:52:39 +02:00
pxa3xx-gcu.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pxa168fb.c pxa168fb: trivial typo fix 2018-12-20 19:13:09 +01:00
pxa168fb.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pxafb.c video: fbdev: pxafb: Fix "WARNING: invalid free of devm_ allocated data" 2018-12-20 19:13:08 +01:00
pxafb.h video: fbdev: pxafb: Add support for lcd-supply regulator 2018-07-24 19:11:26 +02:00
q40fb.c video: fbdev: make fb_var_screeninfo const 2017-09-04 16:00:50 +02:00
s1d13xxxfb.c fbdev: s1d13xxxfb: remove m32r specific hacks 2018-03-26 15:56:46 +02:00
s3c-fb.c video: fbdev: s3c-fb: remove dead platform code for Exynos and S5PV210 platforms 2018-03-28 16:34:29 +02:00
s3c2410fb.c video: fbdev: Use dev_get_drvdata() 2019-05-06 15:57:47 +02:00
s3c2410fb.h
…
s3fb.c video: fbdev: s3fb: constify pci_device_id. 2017-08-01 17:20:45 +02:00
sa1100fb.c video: sa1100fb: move pseudo palette into sa1100fb_info structure 2017-10-17 16:01:13 +02:00
sa1100fb.h video: sa1100fb: move pseudo palette into sa1100fb_info structure 2017-10-17 16:01:13 +02:00
sbuslib.c fbdev: sbuslib: integer overflow in sbusfb_ioctl_helper() 2018-10-08 12:57:36 +02:00
sbuslib.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sh7760fb.c media: fbdev: sh7760fb: convert to SPDX identifiers 2018-09-12 09:31:04 -04:00
sh_mobile_lcdcfb.c video: fbdev: sh_mobile_lcdcfb: remove unused MERAM support 2018-05-14 15:47:30 +02:00
sh_mobile_lcdcfb.h video: fbdev: sh_mobile_lcdcfb: remove unused MERAM support 2018-05-14 15:47:30 +02:00
simplefb.c video: fbdev: simplefb: Stop including <linux/clk-provider.h> 2018-07-03 17:43:09 +02:00
skeletonfb.c docs: fix broken references with multiple hints 2018-06-15 18:10:01 -03:00
sm501fb.c video: sm501fb: Improve a size determination in sm501fb_probe() 2018-04-26 12:24:18 +02:00
sm712.h fbdev: sm712fb: use 1024x768 by default on non-MIPS, fix garbled display 2019-04-01 17:46:59 +02:00
sm712fb.c fbdev: sm712fb: fix memory frequency by avoiding a switch/case fallthrough 2019-04-02 17:14:10 +02:00
smscufx.c video: smscufx: Delete an error message for a failed memory allocation in ufx_realloc_framebuffer() 2018-03-28 16:34:28 +02:00
ssd1307fb.c video: ssd1307fb: Do not hard code active-low reset sequence 2019-02-08 19:24:48 +01:00
sstfb.c
…
sticore.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
stifb.c video/fbdev/stifb: Fix spelling mistake in fall-through annotation 2018-09-26 18:50:54 +02:00
sunxvr500.c video: fbdev: sunxvr500: constify pci_device_id. 2017-08-01 17:20:43 +02:00
sunxvr1000.c video: fbdev: Convert to using %pOF instead of full_name 2017-08-07 17:22:13 +02:00
sunxvr2500.c video: fbdev: sunxvr2500: constify pci_device_id. 2017-08-01 17:20:41 +02:00
tcx.c video: fbdev: Convert to using %pOF instead of full_name 2017-08-07 17:22:13 +02:00
tdfxfb.c video: fbdev: mark expected switch fall-throughs 2018-07-24 19:11:28 +02:00
tgafb.c
…
tmiofb.c
…
tridentfb.c video: fbdev: tridentfb: remove deadcode on unreachable case statement 2018-07-24 19:11:28 +02:00
udlfb.c udlfb: introduce a rendering mutex 2019-04-01 17:46:57 +02:00
uvesafb.c video: fbdev: Use dev_get_drvdata() 2019-05-06 15:57:47 +02:00
valkyriefb.c powerpc, fbdev: Use NV_CMODE and NV_VMODE only when CONFIG_PPC32 && CONFIG_PPC_PMAC && CONFIG_NVRAM 2019-01-22 10:21:45 +01:00
valkyriefb.h
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vesafb.c video: fbdev: vesafb: fix indentation issue 2019-04-01 17:46:54 +02:00
vfb.c vfb: fix video mode and line_length being set when loaded 2018-01-04 16:53:50 +01:00
vga16fb.c video: fbdev: remove redundant self assignment of 'height' 2017-12-29 19:48:43 +01:00
vt8500lcdfb.c video/fbdev/vt8500lcdfb: Delete an error message for a failed memory allocation in vt8500lcd_probe() 2017-12-29 19:48:44 +01:00
vt8500lcdfb.h
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vt8623fb.c video: fbdev: vt8623fb: constify vt8623_timing_regs 2017-08-18 19:56:40 +02:00
w100fb.c treewide: kmalloc() -> kmalloc_array() 2018-06-12 16:19:22 -07:00
w100fb.h
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wm8505fb.c video/fbdev/wm8505fb: Delete an error message for a failed memory allocation in wm8505fb_probe() 2017-12-29 19:48:43 +01:00
wm8505fb_regs.h
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wmt_ge_rops.c
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wmt_ge_rops.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
xen-fbfront.c xen, fbfront: mark expected switch fall-through 2019-04-01 17:46:57 +02:00
xilinxfb.c video: fbdev: Fix multiple style issues in xilinxfb 2017-08-21 16:49:57 +02:00