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linux-sg2042
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linux-sg2042/drivers
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Ard Biesheuvel c8f325a59c efi/fdt: Avoid FDT manipulation after ExitBootServices() 
Some AArch64 UEFI implementations disable the MMU in ExitBootServices(),
after which unaligned accesses to RAM are no longer supported.

Commit:

  abfb7b686a ("efi/libstub/arm*: Pass latest memory map to the kernel")

fixed an issue in the memory map handling of the stub FDT code, but
inadvertently created an issue with such firmware, by moving some
of the FDT manipulation to after the invocation of ExitBootServices().

Given that the stub's libfdt implementation uses the ordinary, accelerated
string functions, which rely on hardware handling of unaligned accesses,
manipulating the FDT with the MMU off may result in alignment faults.

So fix the situation by moving the update_fdt_memmap() call into the
callback function invoked by efi_exit_boot_services() right before it
calls the ExitBootServices() UEFI service (which is arguably a better
place for it anyway)

Note that disabling the MMU in ExitBootServices() is not compliant with
the UEFI spec, and carries great risk due to the fact that switching from
cached to uncached memory accesses halfway through compiler generated code
(i.e., involving a stack) can never be done in a way that is architecturally
safe.

Fixes: abfb7b686a ("efi/libstub/arm*: Pass latest memory map to the kernel")
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Tested-by: Riku Voipio <riku.voipio@linaro.org>
Cc: <stable@vger.kernel.org>
Cc: mark.rutland@arm.com
Cc: linux-efi@vger.kernel.org
Cc: matt@codeblueprint.co.uk
Cc: leif.lindholm@linaro.org
Cc: linux-arm-kernel@lists.infradead.org
Link: http://lkml.kernel.org/r/1485971102-23330-2-git-send-email-ard.biesheuvel@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
 		2017-02-01 21:17:49 +01:00
..
accessibility
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acpi Merge branches 'acpi-scan', 'acpi-sysfs', 'acpi-wdat' and 'acpi-tables' 2017-01-06 14:36:30 +01:00
amba
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android
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ata Merge branch 'for-4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata 2016-12-13 15:30:50 -08:00
atm Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
auxdisplay auxdisplay: fix new ht16k33 build errors 2017-01-11 09:27:30 +01:00
base memory_hotplug: make zone_can_shift() return a boolean value 2017-01-24 16:26:14 -08:00
bcma
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block nbd: only set MSG_MORE when we have more to send 2017-01-19 14:31:50 -07:00
bluetooth Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2016-12-16 10:24:44 -08:00
bus cpu/hotplug: Cleanup state names 2016-12-25 10:47:44 +01:00
cdrom Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
char virtio_console: fix a crash in config_work_handler 2017-01-19 23:46:31 +02:00
clk One fix for Samsung Exynos524x SoCs where recent IOMMU patches have 2017-01-21 18:46:45 -08:00
clocksource clocksource/exynos_mct: Clear interrupt when cpu is shut down 2017-01-17 10:08:38 +01:00
connector
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cpufreq Merge branch 'pm-cpufreq' 2017-01-06 14:34:52 +01:00
cpuidle Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2016-12-27 17:51:36 -08:00
dax libnvdimm for 4.10 2016-12-18 15:49:10 -08:00
dca
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devfreq PM / devfreq: exynos-bus: Fix the wrong return value 2017-01-03 00:21:45 +01:00
dio Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
dma dmaengine: rcar-dmac: unmap slave resource when channel is freed 2017-01-13 12:14:28 +05:30
dma-buf
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edac Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
eisa
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extcon extcon: return error code on failure 2017-01-11 09:11:39 +01:00
firewire
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firmware efi/fdt: Avoid FDT manipulation after ExitBootServices() 2017-02-01 21:17:49 +01:00
fmc
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fpga
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gpio gpio: provide lockdep keys for nested/unnested irqchips 2017-01-19 09:57:20 +01:00
gpu drm-qemu: virtio sparse fix, MAINTAINERS updates. 2017-01-23 09:25:53 +10:00
hid HID: wacom: Fix sibling detection regression 2017-01-19 14:19:25 +01:00
hsi
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hv clocksource: Use a plain u64 instead of cycle_t 2016-12-25 11:04:12 +01:00
hwmon hwmon: (lm90) fix temp1_max_alarm attribute 2017-01-02 10:15:28 -08:00
hwspinlock
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hwtracing coresight/etm3/4x: Consolidate hotplug state space 2016-12-25 10:47:44 +01:00
i2c i2c: piix4: Avoid race conditions with IMC 2017-01-12 20:52:12 +01:00
ide Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
idle Power management material for v4.10-rc1 2016-12-13 10:41:53 -08:00
iio First round of IIO fixes for the 4.10 cycle. 2017-01-02 16:59:44 +01:00
infiniband net/mlx4_core: Fix raw qp flow steering rules under SRIOV 2016-12-29 14:17:40 -05:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2017-01-13 11:49:34 -08:00
iommu IOMMU Fixes for Linux v4.10-rc2 2017-01-06 10:49:36 -08:00
ipack
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irqchip Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-12-25 14:30:04 -08:00
isdn Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
leds cpu/hotplug: Cleanup state names 2016-12-25 10:47:44 +01:00
lguest Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
lightnvm Char/Misc driver patches for 4.10-rc1 2016-12-13 12:11:01 -08:00
macintosh Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
mailbox ktime: Cleanup ktime_set() usage 2016-12-25 17:21:22 +01:00
mcb
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md md/raid5: Use correct IS_ERR() variation on pointer check 2017-01-09 13:58:10 -08:00
media ktime: Cleanup ktime_set() usage 2016-12-25 17:21:22 +01:00
memory
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memstick drivers/memstick/core/memstick.c: avoid -Wnonnull warning 2017-01-24 16:26:14 -08:00
message Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
mfd - New Device Support 2016-12-19 08:16:26 -08:00
misc mei: bus: enable OS version only for SPT and newer 2017-01-11 07:43:57 +01:00
mmc mmc: core: Restore parts of the polling policy when switch to HS/HS DDR 2017-01-16 16:17:42 +01:00
mtd mtd: nand: lpc32xx: fix invalid error handling of a requested irq 2017-01-04 20:50:18 +01:00
net net/mlx4_core: Eliminate warning messages for SRQ_LIMIT under SRIOV 2017-01-16 15:08:29 -05:00
nfc
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ntb ntb_transport: Remove unnecessary call to ntb_peer_spad_read 2016-12-23 16:11:07 -05:00
nubus Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
nvdimm libnvdimm, namespace: fix pmem namespace leak, delete when size set to zero 2017-01-13 09:50:33 -08:00
nvme nvme: use blk_rq_payload_bytes 2017-01-13 15:17:04 -07:00
nvmem nvmem: fix nvmem_cell_read() return type doc 2017-01-04 18:22:47 +01:00
of pci-v4.10-changes 2016-12-15 12:46:48 -08:00
oprofile Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
parisc Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
parport Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
pci PCI/MSI: pci-xgene-msi: Fix CPU hotplug registration handling 2017-01-17 08:41:51 -06:00
pcmcia drivers/pcmcia/m32r_pcc.c: check return from add_pcc_socket 2016-12-12 18:55:06 -08:00
perf cpu/hotplug: Cleanup state names 2016-12-25 10:47:44 +01:00
phy SCSI misc on 20161213 2016-12-14 10:49:33 -08:00
pinctrl pinctrl: samsung: Fix the width of PINCFG_TYPE_DRV bitfields for Exynos5433 2016-12-30 14:27:42 +01:00
platform platform/x86: ideapad-laptop: handle ACPI event 1 2017-01-22 12:47:06 +02:00
pnp Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
power ktime: Cleanup ktime_set() usage 2016-12-25 17:21:22 +01:00
powercap powercap / RAPL: Add Knights Mill CPUID 2016-11-30 23:41:33 +01:00
pps
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ps3
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ptp Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-12-12 19:56:15 -08:00
pwm pwm: Changes for v4.10-rc1 2016-12-15 11:45:13 -08:00
rapidio
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ras
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regulator - New Device Support 2016-12-19 08:16:26 -08:00
remoteproc Revert "remoteproc: Merge table_ptr and cached_table pointers" 2016-12-30 03:26:31 -08:00
reset ARM: SoC driver updates for v4.10 2016-12-15 16:03:25 -08:00
rpmsg rpmsg: virtio_rpmsg_bus: fix channel creation 2016-12-30 03:12:11 -08:00
rtc ktime: Cleanup ktime_set() usage 2016-12-25 17:21:22 +01:00
s390 virtio/s390: virtio: constify virtio_config_ops structures 2017-01-19 23:46:34 +02:00
sbus Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
scsi Merge branch 'scsi-target-for-v4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/bvanassche/linux 2017-01-20 14:17:04 -08:00
sfi
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sh lib: radix-tree: check accounting of existing slot replacement users 2016-12-12 18:55:08 -08:00
sn
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soc soc: ti: wkup_m3_ipc: Fix error return code in wkup_m3_ipc_probe() 2017-01-12 13:37:49 -08:00
spi spi: Fixes for v4.10 2017-01-20 12:25:11 -08:00
spmi
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ssb
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staging staging: octeon: Call SET_NETDEV_DEV() 2017-01-03 17:11:50 +01:00
target target: support XCOPY requests without parameters 2017-01-10 08:41:30 -08:00
tc
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thermal Merge branches 'thermal-core' and 'thermal-soc' into for-rc 2017-01-20 16:24:54 +08:00
thunderbolt Char/Misc driver patches for 4.10-rc1 2016-12-13 12:11:01 -08:00
tty sysrq: attach sysrq handler correctly for 32-bit kernel 2017-01-11 09:22:54 +01:00
uio uio-hv-generic: store physical addresses instead of virtual 2016-12-10 14:57:58 +01:00
usb xhci: remove WARN_ON if dma mask is not set for platform devices 2017-01-20 14:55:20 +01:00
uwb
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vfio vfio/type1: Remove pid_namespace.h include 2017-01-13 08:23:33 -07:00
vhost vhost/scsi: silence uninitialized variable warning 2017-01-19 23:46:30 +02:00
video fbdev: color map copying bounds checking 2017-01-24 16:26:14 -08:00
virt
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virtio virtio_mmio: Set dev.release() to avoid warning 2016-12-16 00:13:39 +02:00
vlynq
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vme vme: Fix wrong pointer utilization in ca91cx42_slave_get 2017-01-11 10:42:16 +01:00
w1
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watchdog Watchdog updates for v4.10 2016-12-24 11:27:45 -08:00
xen xen: fix for 4.10 rc4 2017-01-19 09:38:27 -08:00
zorro Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
Kconfig
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Makefile
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