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Mark Rutland b0e01e9d23 KVM: arm/arm64: Correct CPSR on exception entry 
commit 3c2483f154 upstream.

When KVM injects an exception into a guest, it generates the CPSR value
from scratch, configuring CPSR.{M,A,I,T,E}, and setting all other
bits to zero.

This isn't correct, as the architecture specifies that some CPSR bits
are (conditionally) cleared or set upon an exception, and others are
unchanged from the original context.

This patch adds logic to match the architectural behaviour. To make this
simple to follow/audit/extend, documentation references are provided,
and bits are configured in order of their layout in SPSR_EL2. This
layout can be seen in the diagram on ARM DDI 0487E.a page C5-426.

Note that this code is used by both arm and arm64, and is intended to
fuction with the SPSR_EL2 and SPSR_HYP layouts.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Alexandru Elisei <alexandru.elisei@arm.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20200108134324.46500-3-mark.rutland@arm.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 		2020-02-11 04:35:16 -08:00
..
boot ARM: dts: am43x-epos-evm: set data pin directions for spi0 and spi1 2020-02-05 21:22:50 +00:00
common ARM: scoop: Use the right include 2019-09-03 22:09:46 +02:00
configs ARM: config: aspeed-g5: Enable 8250_DW quirks 2020-02-01 09:34:49 +00:00
crypto crypto: arm/aes-ce - add dependency on AES library 2019-10-01 23:06:43 +10:00
include KVM: arm/arm64: Correct CPSR on exception entry 2020-02-11 04:35:16 -08:00
kernel ARM: 8955/1: virt: Relax arch timer version check during early boot 2020-02-05 21:22:49 +00:00
kvm kbuild: change *FLAGS_<basetarget>.o to take the path relative to $(obj) 2019-09-04 23:12:50 +09:00
lib Merge branch 'misc' into fixes 2019-10-22 17:37:29 +01:00
mach-actions treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
mach-alpine treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 2019-05-30 11:26:37 -07:00
mach-artpec treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
mach-asm9260 treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
mach-aspeed ARM: SoC fixes 2019-09-30 10:04:28 -07:00
mach-at91 ARM: at91: move platform-specific asm-offset.h to arch/arm/mach-at91 2019-08-23 21:50:10 +02:00
mach-axxia treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
mach-bcm ARM: SoC platform updates 2019-07-19 17:05:08 -07:00
mach-berlin treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
mach-clps711x treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
mach-cns3xxx treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 418 2019-06-05 17:37:15 +02:00
mach-davinci ARM: davinci: select CONFIG_RESET_CONTROLLER 2020-01-23 08:22:32 +01:00
mach-digicolor treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
mach-dove ARM: orion/mvebu: unify debug-ll virtual addresses 2019-08-14 19:24:58 +02:00
mach-ebsa110 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
mach-efm32 treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
mach-ep93xx Merge branch 'spi-5.4' into spi-next 2019-09-15 10:32:06 +01:00
mach-exynos ARM: exynos: Enable support for ARM architected timers 2019-09-09 20:56:43 +02:00
mach-footbridge treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
mach-gemini treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
mach-highbank ARM: SoC platform updates 2019-07-19 17:05:08 -07:00
mach-hisi treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
mach-imx ARM: imx: stop adjusting ar8031 phy tx delay 2019-08-24 20:30:22 +02:00
mach-integrator treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
mach-iop32x ARM: iop32x: merge everything into mach-iop32x/ 2019-08-14 15:36:22 +02:00
mach-ixp4xx docs: arm: convert docs to ReST and rename to *.rst 2019-07-15 09:20:24 -03:00
mach-keystone ARM: SoC platform updates 2019-07-19 17:05:08 -07:00
mach-lpc18xx treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
mach-lpc32xx ARM: lpc32xx: allow multiplatform build 2019-08-15 21:34:08 +02:00
mach-mediatek treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
mach-meson treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 2019-05-30 11:26:37 -07:00
mach-milbeaut treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
mach-mmp irqchip/mmp: Mask off interrupts from other cores 2019-08-30 15:23:30 +01:00
mach-moxart treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 2019-05-30 11:26:37 -07:00
mach-mv78xx0 ARM: orion/mvebu: unify debug-ll virtual addresses 2019-08-14 19:24:58 +02:00
mach-mvebu treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 406 2019-06-05 17:37:13 +02:00
mach-mxs treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
mach-nomadik treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
mach-npcm treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
mach-nspire ARM: mach-nspire: Kill off CLCD auxdata 2019-08-13 15:48:23 +02:00
mach-omap1 Merge branch 'asoc-5.3' into asoc-linus 2019-09-09 14:55:18 +01:00
mach-omap2 hwrng: omap3-rom - Fix missing clock by probing with device tree 2020-01-26 10:01:03 +01:00
mach-orion5x ARM: orion/mvebu: unify debug-ll virtual addresses 2019-08-14 19:24:58 +02:00
mach-oxnas treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
mach-picoxcell treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
mach-prima2 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 4 2019-05-21 11:28:40 +02:00
mach-pxa ARM: SoC platform updates 2019-07-19 17:05:08 -07:00
mach-qcom treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
mach-rda treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
mach-realview treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
mach-rockchip Another missing of_node_put 2019-06-17 05:14:24 -07:00
mach-rpc ARM: riscpc: Mark expected switch fall-through 2019-08-20 19:42:48 -05:00
mach-s3c24xx docs: arm: convert docs to ReST and rename to *.rst 2019-07-15 09:20:24 -03:00
mach-s3c64xx ARM: s3c64xx: squash samsung_usb_phy.h into setup-usb-phy.c 2019-08-21 19:50:40 +02:00
mach-s5pv210
…
mach-sa1100 ARM: SoC platform updates 2019-07-19 17:05:08 -07:00
mach-shmobile ARM: mach-shmobile: Don't init CNTVOFF/counter if PSCI is available 2019-05-31 11:38:01 +02:00
mach-socfpga treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
mach-spear treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
mach-sti treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
mach-stm32 ARM: SoC platform updates 2019-07-19 17:05:08 -07:00
mach-sunxi ARM: sunxi: Fix CPU powerdown on A83T 2019-10-29 09:09:56 +01:00
mach-tango ARM: use arch_extension directive instead of arch argument 2019-06-19 09:44:25 -07:00
mach-tegra ARM: tegra: Fix FLOW_CTLR_HALT register clobbering by tegra_resume() 2019-12-21 11:04:48 +01:00
mach-u300 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 194 2019-05-30 11:29:22 -07:00
mach-uniphier
…
mach-ux500 ARM: ux500: Stop populating the PRCMU devices early 2019-07-23 09:17:06 +02:00
mach-versatile Versatile platform updates for the v5.3 kernel cycle: 2019-06-17 05:11:53 -07:00
mach-vexpress ARM: vexpress: Set-up shared OPP table instead of individual for each CPU 2020-01-12 12:21:17 +01:00
mach-vt8500 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
mach-zx treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
mach-zynq ARM: zynq: Use memcpy_toio instead of memcpy on smp bring-up 2019-08-14 09:40:43 +02:00
mm ARM: 8937/1: spectre-v2: remove Brahma-B53 from hardening 2020-01-04 19:18:12 +01:00
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2019-06-17 20:20:36 -07:00
nwfpe treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61 2019-05-24 17:36:45 +02:00
oprofile
…
plat-omap ARM: OMAP: dma: Mark expected switch fall-throughs 2019-08-13 04:53:37 -07:00
plat-orion treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
plat-pxa treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
plat-samsung ARM: samsung: Fix system restart on S3C6410 2019-09-09 20:54:35 +02:00
plat-versatile treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
probes treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
tools docs: arm: convert docs to ReST and rename to *.rst 2019-07-15 09:20:24 -03:00
vdso kbuild: add --hash-style= and --build-id unconditionally 2019-07-17 22:37:51 +09:00
vfp treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
xen xen: fixes and cleanups for 5.4-rc2 2019-10-04 11:13:09 -07:00
Kconfig arm: Implement copy_thread_tls 2020-01-14 20:08:34 +01:00
Kconfig-nommu
…
Kconfig.debug ARM updates for 5.4-rc1: 2019-09-22 09:39:09 -07:00
Makefile ARM updates for 5.4-rc1: 2019-09-22 09:39:09 -07:00