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661e6b02b5
linux/arch/arm
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Zhichao Huang 661e6b02b5 KVM: arm: plug potential guest hardware debug leakage 
Hardware debugging in guests is not intercepted currently, it means
that a malicious guest can bring down the entire machine by writing
to the debug registers.

This patch enable trapping of all debug registers, preventing the
guests to access the debug registers. This includes access to the
debug mode(DBGDSCR) in the guest world all the time which could
otherwise mess with the host state. Reads return 0 and writes are
ignored (RAZ_WI).

The result is the guest cannot detect any working hardware based debug
support. As debug exceptions are still routed to the guest normal
debug using software based breakpoints still works.

To support debugging using hardware registers we need to implement a
debug register aware world switch as well as special trapping for
registers that may affect the host state.

Cc: stable@vger.kernel.org
Signed-off-by: Zhichao Huang <zhichao.huang@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Christoffer Dall <cdall@linaro.org>
Signed-off-by: Christoffer Dall <cdall@linaro.org>
2017-05-15 14:29:19 +02:00
..
boot Sort of on the quieter side this time, which is probably due more 2017-05-10 13:38:18 -07:00
common ARM/clk: move the ICST library to drivers/clk 2017-04-07 11:58:12 +02:00
configs ARM: SoC defconfig updates 2017-05-09 09:58:15 -07:00
crypto crypto: arm/aes-neonbs - resolve fallback cipher at runtime 2017-03-09 18:34:16 +08:00
firmware
include KVM: arm: plug potential guest hardware debug leakage 2017-05-15 14:29:19 +02:00
kernel arm64 2nd set of updates for 4.12: 2017-05-11 11:27:54 -07:00
kvm KVM: arm: plug potential guest hardware debug leakage 2017-05-15 14:29:19 +02:00
lib new helper: uaccess_kernel() 2017-03-28 16:43:25 -04:00
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 ARM: ARTPEC-6: add select MFD_SYSCON to MACH_ARTPEC6 2016-11-26 00:06:34 +01:00
mach-asm9260
mach-aspeed ARM: aspeed: Select pinctrl drivers 2017-01-10 22:36:06 +11:00
mach-at91 ARM: at91: move SoC detection to its own driver 2017-03-31 20:36:10 +02:00
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 ARM: brcmstb: Enable ARCH_HAS_HOLES_MEMORYMODEL 2017-03-15 14:57:41 -07:00
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 2017-05-09 09:49:36 -07:00
mach-digicolor
mach-dove
mach-ebsa110
mach-efm32
mach-ep93xx ARM: ep93xx: Register ts73xx-fpga manager driver for TS-7300 2017-03-17 15:10:48 +09:00
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 clocksource: Use a plain u64 instead of cycle_t 2016-12-25 11:04:12 +01:00
mach-gemini ARM: gemini: don't select SERIAL_OF_PLATFORM 2017-03-24 22:12:42 +01:00
mach-highbank
mach-hisi ARM: hisi: fix error return code in hip04_smp_init() 2017-03-28 15:30:54 +01:00
mach-imx ARM: SoC driver updates 2017-05-09 10:01:15 -07:00
mach-integrator ARM: SoC platform updates for v4.10 2016-12-15 15:39:02 -08:00
mach-iop13xx Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
mach-iop32x
mach-iop33x
mach-ixp4xx scripts/spelling.txt: add regsiter -> register spelling mistake 2017-05-08 17:15:13 -07:00
mach-keystone ARM: keystone: Drop PM domain support for k2g 2017-04-04 08:59:28 -07:00
mach-ks8695
mach-lpc18xx
mach-lpc32xx ARM: SoC platform updates for v4.10 2016-12-15 15:39:02 -08:00
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 ARM: mmp: let clk_disable() return immediately if clk is NULL 2017-03-30 17:38:34 +02:00
mach-moxart irqchip/faraday: Replace moxa with ftintc010 2017-04-07 10:36:30 +01:00
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 ARM: mxs: add support for I2SE Duckbill 2 boards 2017-04-10 21:25:50 +08:00
mach-netx
mach-nomadik
mach-nspire
mach-omap1 ARM: OMAP: PM: Drop useless checks for PM_SUSPEND_STANDBY 2017-03-06 10:38:19 -08:00
mach-omap2 Sort of on the quieter side this time, which is probably due more 2017-05-10 13:38:18 -07:00
mach-orion5x ARM: orion5x: only call into phylib when available 2017-03-30 17:30:39 +02:00
mach-oxnas ARM: oxnas: remove redundant select CPU_V6K 2017-03-20 10:13:45 +01:00
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 ARM: pxa/raumfeld: fix compile error in rotary controller resources 2017-04-18 11:28:38 -07:00
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 regulator: arizona-ldo1: Move pdata into a separate structure 2017-04-25 16:36:32 +01:00
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 ARM: 8660/1: shmobile: r7s72100: Enable L2 cache 2017-03-17 10:01:27 +00:00
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 ARM: stm32: Add a new SOC - STM32H743 2017-03-24 11:37:24 +01:00
mach-sunxi ARM: sunxi: Select PM_OPP 2017-03-06 07:37:41 +01:00
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 soc/tegra: Move Tegra flowctrl driver 2017-04-04 15:48:04 +02:00
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 ARM: w90x900: let clk_disable() return immediately if clk is NULL 2017-03-30 17:37:19 +02:00
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 IOMMU Updates for Linux v4.12 2017-05-09 15:15:47 -07:00
net arm: use set_memory.h header 2017-05-08 17:15:13 -07:00
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 clocksource: Use a plain u64 instead of cycle_t 2016-12-25 11:04:12 +01:00
plat-omap
plat-orion ARM: orion5x: only call into phylib when available 2017-03-30 17:30:39 +02:00
plat-pxa
plat-samsung dmaengine: pl330: remove pdata based initialization 2017-03-28 21:37:48 +05:30
plat-versatile ARM: plat-versatile: remove stale clock header 2017-04-07 11:57:57 +02:00
probes arm: kprobes: Align stack to 8-bytes in test code 2017-03-21 16:24:19 +00:00
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 xen: Implement EFI reset_system callback 2017-05-02 12:06:50 +02:00
Kconfig ARM: SoC platform updates 2017-05-09 09:49:36 -07:00
Kconfig-nommu ARM: 8635/1: nommu: allow enabling REMAP_VECTORS_TO_RAM 2017-01-10 23:32:54 +00:00
Kconfig.debug arch: Move CONFIG_DEBUG_RODATA and CONFIG_SET_MODULE_RONX to be common 2017-02-07 12:32:52 -08:00
Makefile arm: Use full path in KBUILD_IMAGE definition 2017-03-20 22:42:20 +09:00