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Marc Zyngier 979acd5e18 arm64: KVM: fix 2-level page tables unmapping 
When using 64kB pages, we only have two levels of page tables,
meaning that PGD, PUD and PMD are fused. In this case, trying
to refcount PUDs and PMDs independently is a a complete disaster,
as they are the same.

We manage to get it right for the allocation (stage2_set_pte uses
{pmd,pud}_none), but the unmapping path clears both pud and pmd
refcounts, which fails spectacularly with 2-level page tables.

The fix is to avoid calling clear_pud_entry when both the pmd and
pud pages are empty. For this, and instead of introducing another
pud_empty function, consolidate both pte_empty and pmd_empty into
page_empty (the code is actually identical) and use that to also
test the validity of the pud.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
2013-08-07 18:17:39 -07:00
..
boot ARM: SoC fixes for 3.11-rc 2013-07-13 15:00:26 -07:00
common arm: delete __cpuinit/__CPUINIT usage from all ARM users 2013-07-14 19:36:52 -04:00
configs ARM: SoC fixes for 3.11-rc 2013-07-13 15:00:26 -07:00
crypto
include arm: delete __cpuinit/__CPUINIT usage from all ARM users 2013-07-14 19:36:52 -04:00
kernel arm: delete __cpuinit/__CPUINIT usage from all ARM users 2013-07-14 19:36:52 -04:00
kvm arm64: KVM: fix 2-level page tables unmapping 2013-08-07 18:17:39 -07:00
lib arm: delete __cpuinit/__CPUINIT usage from all ARM users 2013-07-14 19:36:52 -04:00
mach-at91 reboot: arm: change reboot_mode to use enum reboot_mode 2013-07-09 10:33:29 -07:00
mach-bcm
mach-bcm2835 reboot: arm: change reboot_mode to use enum reboot_mode 2013-07-09 10:33:29 -07:00
mach-clps711x reboot: arm: change reboot_mode to use enum reboot_mode 2013-07-09 10:33:29 -07:00
mach-cns3xxx reboot: arm: change reboot_mode to use enum reboot_mode 2013-07-09 10:33:29 -07:00
mach-davinci Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media 2013-07-13 12:09:57 -07:00
mach-dove Watchdog: allow orion_wdt to be built for Dove 2013-07-11 22:17:56 +02:00
mach-ebsa110 reboot: arm: change reboot_mode to use enum reboot_mode 2013-07-09 10:33:29 -07:00
mach-ep93xx reboot: arm: change reboot_mode to use enum reboot_mode 2013-07-09 10:33:29 -07:00
mach-exynos arm: delete __cpuinit/__CPUINIT usage from all ARM users 2013-07-14 19:36:52 -04:00
mach-footbridge reboot: arm: change reboot_mode to use enum reboot_mode 2013-07-09 10:33:29 -07:00
mach-gemini
mach-highbank arm: delete __cpuinit/__CPUINIT usage from all ARM users 2013-07-14 19:36:52 -04:00
mach-imx arm: delete __cpuinit/__CPUINIT usage from all ARM users 2013-07-14 19:36:52 -04:00
mach-integrator reboot: arm: change reboot_mode to use enum reboot_mode 2013-07-09 10:33:29 -07:00
mach-iop13xx reboot: arm: change reboot_mode to use enum reboot_mode 2013-07-09 10:33:29 -07:00
mach-iop32x reboot: arm: change reboot_mode to use enum reboot_mode 2013-07-09 10:33:29 -07:00
mach-iop33x
mach-ixp4xx ARM: SoC fixes for 3.11-rc 2013-07-13 15:00:26 -07:00
mach-keystone arm: delete __cpuinit/__CPUINIT usage from all ARM users 2013-07-14 19:36:52 -04:00
mach-kirkwood Watchdog: allow orion_wdt to be built for Dove 2013-07-11 22:17:56 +02:00
mach-ks8695 reboot: arm: change reboot_mode to use enum reboot_mode 2013-07-09 10:33:29 -07:00
mach-lpc32xx reboot: arm: change reboot_mode to use enum reboot_mode 2013-07-09 10:33:29 -07:00
mach-mmp reboot: arm: change reboot_mode to use enum reboot_mode 2013-07-09 10:33:29 -07:00
mach-msm arm: delete __cpuinit/__CPUINIT usage from all ARM users 2013-07-14 19:36:52 -04:00
mach-mv78xx0 reboot: arm: change reboot_mode to use enum reboot_mode 2013-07-09 10:33:29 -07:00
mach-mvebu arm: delete __cpuinit/__CPUINIT usage from all ARM users 2013-07-14 19:36:52 -04:00
mach-mxs Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2013-07-09 18:24:39 -07:00
mach-netx reboot: arm: change reboot_mode to use enum reboot_mode 2013-07-09 10:33:29 -07:00
mach-nomadik reboot: arm: change reboot_mode to use enum reboot_mode 2013-07-09 10:33:29 -07:00
mach-nspire arm: Add Initial TI-Nspire support 2013-06-21 20:06:30 +02:00
mach-omap1 reboot: arm: change reboot_mode to use enum reboot_mode 2013-07-09 10:33:29 -07:00
mach-omap2 arm: delete __cpuinit/__CPUINIT usage from all ARM users 2013-07-14 19:36:52 -04:00
mach-orion5x Watchdog: allow orion_wdt to be built for Dove 2013-07-11 22:17:56 +02:00
mach-picoxcell reboot: arm: change reboot_mode to use enum reboot_mode 2013-07-09 10:33:29 -07:00
mach-prima2 arm: delete __cpuinit/__CPUINIT usage from all ARM users 2013-07-14 19:36:52 -04:00
mach-pxa reboot: arm: change reboot_mode to use enum reboot_mode 2013-07-09 10:33:29 -07:00
mach-realview reboot: arm: change reboot_mode to use enum reboot_mode 2013-07-09 10:33:29 -07:00
mach-rockchip arm: add basic support for Rockchip RK3066a boards 2013-06-21 09:21:02 +02:00
mach-rpc reboot: arm: change reboot_mode to use enum reboot_mode 2013-07-09 10:33:29 -07:00
mach-s3c24xx cpufreq: s3c24xx: fix "depends on ARM_S3C24XX" in Kconfig 2013-07-16 21:52:22 +02:00
mach-s3c64xx reboot: arm: change reboot_mode to use enum reboot_mode 2013-07-09 10:33:29 -07:00
mach-s5p64x0 reboot: arm: change reboot_mode to use enum reboot_mode 2013-07-09 10:33:29 -07:00
mach-s5pc100 reboot: arm: change reboot_mode to use enum reboot_mode 2013-07-09 10:33:29 -07:00
mach-s5pv210 For the 3.11 merge we only have one new MFD driver for the Kontron PLD. 2013-07-10 11:10:27 -07:00
mach-sa1100 reboot: arm: change reboot_mode to use enum reboot_mode 2013-07-09 10:33:29 -07:00
mach-shark reboot: arm: change reboot_mode to use enum reboot_mode 2013-07-09 10:33:29 -07:00
mach-shmobile arm: delete __cpuinit/__CPUINIT usage from all ARM users 2013-07-14 19:36:52 -04:00
mach-socfpga arm: delete __cpuinit/__CPUINIT usage from all ARM users 2013-07-14 19:36:52 -04:00
mach-spear arm: delete __cpuinit/__CPUINIT usage from all ARM users 2013-07-14 19:36:52 -04:00
mach-sti arm: delete __cpuinit/__CPUINIT usage from all ARM users 2013-07-14 19:36:52 -04:00
mach-sunxi reboot: arm: change reboot_mode to use enum reboot_mode 2013-07-09 10:33:29 -07:00
mach-tegra arm: delete __cpuinit/__CPUINIT usage from all ARM users 2013-07-14 19:36:52 -04:00
mach-u300 reboot: arm: change reboot_mode to use enum reboot_mode 2013-07-09 10:33:29 -07:00
mach-ux500 arm: delete __cpuinit/__CPUINIT usage from all ARM users 2013-07-14 19:36:52 -04:00
mach-versatile reboot: arm: change reboot_mode to use enum reboot_mode 2013-07-09 10:33:29 -07:00
mach-vexpress ARM SoC specific changes 2013-07-02 13:43:38 -07:00
mach-virt Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm 2013-07-03 09:46:29 -07:00
mach-vt8500 reboot: arm: change reboot_mode to use enum reboot_mode 2013-07-09 10:33:29 -07:00
mach-w90x900 reboot: arm: change reboot_mode to use enum reboot_mode 2013-07-09 10:33:29 -07:00
mach-zynq arm: delete __cpuinit/__CPUINIT usage from all ARM users 2013-07-14 19:36:52 -04:00
mm arm: delete __cpuinit/__CPUINIT usage from all ARM users 2013-07-14 19:36:52 -04:00
net
nwfpe
oprofile
plat-iop reboot: arm: change reboot_mode to use enum reboot_mode 2013-07-09 10:33:29 -07:00
plat-omap Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2013-07-06 14:09:38 -07:00
plat-orion Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2013-07-06 14:09:38 -07:00
plat-pxa
plat-samsung Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2013-07-06 14:09:38 -07:00
plat-versatile arm: delete __cpuinit/__CPUINIT usage from all ARM users 2013-07-14 19:36:52 -04:00
tools
vfp
xen xen/arm and xen/arm64: implement HYPERVISOR_tmem_op 2013-07-04 11:41:12 +00:00
Kconfig Merge branch 'fixes' of git://git.linaro.org/people/rmk/linux-arm 2013-07-13 14:58:36 -07:00
Kconfig-nommu
Kconfig.debug Omap fixes and minor defconfig updates that would be good to 2013-07-12 10:59:39 -07:00
Makefile Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm 2013-07-03 09:46:29 -07:00