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138728dd4e
linux/arch/arm
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Ard Biesheuvel 138728dd4e efi/arm-stub: Correct FDT and initrd allocation rules for arm64 
On arm64, we have made some changes over the past year to the way the
kernel itself is allocated and to how it deals with the initrd and FDT.
This patch brings the allocation logic in the EFI stub in line with that,
which is necessary because the introduction of KASLR has created the
possibility for the initrd to be allocated in a place where the kernel
may not be able to map it. (This is mostly a theoretical scenario, since
it only affects systems where the physical memory footprint exceeds the
size of the linear mapping.)

Since we know the kernel itself will be covered by the linear mapping,
choose a suitably sized window (i.e., based on the size of the linear
region) covering the kernel when allocating memory for the initrd.

The FDT may be anywhere in memory on arm64 now that we map it via the
fixmap, so we can lift the address restriction there completely.

Tested-by: Richard Ruigrok <rruigrok@codeaurora.org>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Jeffrey Hugo <jhugo@codeaurora.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Matt Fleming <matt@codeblueprint.co.uk>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-efi@vger.kernel.org
Link: http://lkml.kernel.org/r/20170404160245.27812-4-ard.biesheuvel@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-04-05 12:27:23 +02:00
..
boot sound fixes for 4.11-rc5 2017-03-31 11:53:49 -07:00
common sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h> 2017-03-02 08:42:32 +01:00
configs Linux 4.11-rc1 2017-03-06 08:37:53 -08:00
crypto crypto: arm/crc32 - add build time test for CRC instruction support 2017-03-01 19:47:53 +08:00
firmware
include efi/arm-stub: Correct FDT and initrd allocation rules for arm64 2017-04-05 12:27:23 +02:00
kernel sched/headers: Move task->mm handling methods to <linux/sched/mm.h> 2017-03-03 01:43:28 +01:00
kvm KVM: arm/arm64: Enable KVM_CAP_NR_MEMSLOTS on arm/arm64 2017-03-09 09:13:39 +00:00
lib ARM: 8658/1: uaccess: fix zeroing of 64-bit get_user() 2017-02-16 15:58:32 +00:00
mach-alpine ARM: 8641/1: treewide: Replace uses of virt_to_phys with __pa_symbol 2017-02-28 11:06:10 +00:00
mach-artpec
mach-asm9260
mach-aspeed
mach-at91 ARM: at91: pm: cpu_idle: switch DDR to power-down mode 2017-03-14 11:09:50 +01:00
mach-axxia ARM: 8641/1: treewide: Replace uses of virt_to_phys with __pa_symbol 2017-02-28 11:06:10 +00:00
mach-bcm sched/headers: Prepare for new header dependencies before moving code to <linux/sched/clock.h> 2017-03-02 08:42:27 +01:00
mach-berlin ARM: 8646/1: mmu: decouple VECTORS_BASE from Kconfig 2017-02-28 11:06:12 +00:00
mach-clps711x
mach-cns3xxx
mach-davinci ARM: SoC platform updates 2017-02-23 15:33:54 -08:00
mach-digicolor
mach-dove
mach-ebsa110
mach-efm32
mach-ep93xx RTC for 4.11 2017-02-27 19:59:21 -08:00
mach-exynos Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm 2017-02-28 11:50:53 -08:00
mach-footbridge
mach-gemini
mach-highbank
mach-hisi Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm 2017-02-28 11:50:53 -08:00
mach-imx Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm 2017-02-28 11:50:53 -08:00
mach-integrator
mach-iop13xx
mach-iop32x
mach-iop33x
mach-ixp4xx
mach-keystone ARM: Keystone: Enable ARCH_HAS_RESET_CONTROLLER 2017-01-19 09:36:08 -08:00
mach-ks8695
mach-lpc18xx
mach-lpc32xx
mach-mediatek ARM: 8641/1: treewide: Replace uses of virt_to_phys with __pa_symbol 2017-02-28 11:06:10 +00:00
mach-meson
mach-mmp
mach-moxart
mach-mv78xx0 ARM: mv78xx0: fix possible PCI buffer overflow 2017-01-27 17:52:57 +01:00
mach-mvebu Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm 2017-02-28 11:50:53 -08:00
mach-mxs
mach-netx
mach-nomadik
mach-nspire
mach-omap1 ARM: SoC platform updates 2017-02-23 15:33:54 -08:00
mach-omap2 Linux 4.11-rc1 2017-03-06 08:37:53 -08:00
mach-orion5x RTC for 4.11 2017-02-27 19:59:21 -08:00
mach-oxnas
mach-picoxcell
mach-prima2 ARM: 8641/1: treewide: Replace uses of virt_to_phys with __pa_symbol 2017-02-28 11:06:10 +00:00
mach-pxa Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm 2017-02-28 11:50:53 -08:00
mach-qcom
mach-realview ARM: 8641/1: treewide: Replace uses of virt_to_phys with __pa_symbol 2017-02-28 11:06:10 +00:00
mach-rockchip Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm 2017-02-28 11:50:53 -08:00
mach-rpc sched/headers: Prepare for new header dependencies before moving code to <linux/sched/mm.h> 2017-03-02 08:42:28 +01:00
mach-s3c24xx Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm 2017-02-28 11:50:53 -08:00
mach-s3c64xx Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm 2017-02-28 11:50:53 -08:00
mach-s5pv210 Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm 2017-02-28 11:50:53 -08:00
mach-sa1100 ARM: 8641/1: treewide: Replace uses of virt_to_phys with __pa_symbol 2017-02-28 11:06:10 +00:00
mach-shmobile Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm 2017-02-28 11:50:53 -08:00
mach-socfpga ARM: 8641/1: treewide: Replace uses of virt_to_phys with __pa_symbol 2017-02-28 11:06:10 +00:00
mach-spear ARM: 8641/1: treewide: Replace uses of virt_to_phys with __pa_symbol 2017-02-28 11:06:10 +00:00
mach-sti ARM: 8641/1: treewide: Replace uses of virt_to_phys with __pa_symbol 2017-02-28 11:06:10 +00:00
mach-stm32
mach-sunxi Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm 2017-02-28 11:50:53 -08:00
mach-tango ARM: 8641/1: treewide: Replace uses of virt_to_phys with __pa_symbol 2017-02-28 11:06:10 +00:00
mach-tegra Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm 2017-02-28 11:50:53 -08:00
mach-u300
mach-uniphier
mach-ux500 ARM: SoC: late DT updates for v4.11 2017-03-03 16:15:48 -08:00
mach-versatile
mach-vexpress ARM: 8641/1: treewide: Replace uses of virt_to_phys with __pa_symbol 2017-02-28 11:06:10 +00:00
mach-vt8500
mach-w90x900
mach-zx ARM: 8641/1: treewide: Replace uses of virt_to_phys with __pa_symbol 2017-02-28 11:06:10 +00:00
mach-zynq ARM: 8641/1: treewide: Replace uses of virt_to_phys with __pa_symbol 2017-02-28 11:06:10 +00:00
mm sched/headers: Prepare to remove the <linux/mm_types.h> dependency from <linux/sched.h> 2017-03-02 08:42:37 +01:00
net
nwfpe sched/headers: Move task_struct::signal and task_struct::sighand types and accessors into <linux/sched/signal.h> 2017-03-03 01:43:37 +01:00
oprofile
plat-iop
plat-omap
plat-orion ARM: orion: Register DSA switch as a MDIO device 2017-02-07 10:51:47 -05:00
plat-pxa
plat-samsung
plat-versatile
probes sched/headers: Prepare for new header dependencies before moving code to <linux/sched/debug.h> 2017-03-02 08:42:34 +01:00
tools ARM: wire up statx syscall 2017-03-10 10:15:15 +00:00
vdso
vfp sched/headers: Prepare for new header dependencies before moving code to <linux/sched/signal.h> 2017-03-02 08:42:29 +01:00
xen Merge branch 'stable/for-linus-4.11' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/swiotlb 2017-03-07 10:23:17 -08:00
Kconfig Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm 2017-02-28 11:50:53 -08:00
Kconfig-nommu
Kconfig.debug arch: Move CONFIG_DEBUG_RODATA and CONFIG_SET_MODULE_RONX to be common 2017-02-07 12:32:52 -08:00
Makefile