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2d0e63e030
linux_dsm_epyc7002/arch/arm
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Christoffer Dall 2d0e63e030 KVM: arm/arm64: Avoid VGICv3 save/restore on VHE with no IRQs 
We can finally get completely rid of any calls to the VGICv3
save/restore functions when the AP lists are empty on VHE systems.  This
requires carefully factoring out trap configuration from saving and
restoring state, and carefully choosing what to do on the VHE and
non-VHE path.

One of the challenges is that we cannot save/restore the VMCR lazily
because we can only write the VMCR when ICC_SRE_EL1.SRE is cleared when
emulating a GICv2-on-GICv3, since otherwise all Group-0 interrupts end
up being delivered as FIQ.

To solve this problem, and still provide fast performance in the fast
path of exiting a VM when no interrupts are pending (which also
optimized the latency for actually delivering virtual interrupts coming
from physical interrupts), we orchestrate a dance of only doing the
activate/deactivate traps in vgic load/put for VHE systems (which can
have ICC_SRE_EL1.SRE cleared when running in the host), and doing the
configuration on every round-trip on non-VHE systems.

Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2018-03-19 10:53:21 +00:00
..
boot media updates for v4.16-rc1 2018-02-06 11:27:48 -08:00
common Merge branches 'fixes', 'misc', 'sa1111' and 'sa1100-for-next' into for-next 2018-01-21 15:38:10 +00:00
configs ARM: SoC platform updates for 4.16 2018-02-01 16:17:40 -08:00
crypto crypto: hash - annotate algorithms taking optional key 2018-01-12 23:03:35 +11:00
firmware
include KVM: arm/arm64: Avoid VGICv3 save/restore on VHE with no IRQs 2018-03-19 10:53:21 +00:00
kernel treewide/trivial: Remove ';;$' typo noise 2018-02-22 10:59:33 +01:00
kvm KVM: arm/arm64: Avoid VGICv3 save/restore on VHE with no IRQs 2018-03-19 10:53:21 +00:00
lib Merge branches 'fixes', 'misc', 'sa1111' and 'sa1100-for-next' into for-next 2018-01-21 15:38:10 +00:00
mach-actions ARM: SoC platform updates for 4.15 2017-11-16 14:05:12 -08:00
mach-alpine License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mach-artpec
mach-asm9260
mach-aspeed
mach-at91 License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mach-axxia License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mach-bcm soc: brcmstb: biuctrl: Move to early_initcall 2017-12-20 17:37:44 -08:00
mach-berlin
mach-clps711x License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mach-cns3xxx License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mach-davinci Merge branch 'i2c/for-4.16' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2018-02-04 10:57:43 -08:00
mach-digicolor License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mach-dove License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mach-ebsa110 License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mach-efm32 License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mach-ep93xx ARM: ep93xx: ts72xx: Add support for BK3 board - ts72xx derivative 2017-12-13 22:26:10 +01:00
mach-exynos ARM: EXYNOS: Add SPDX license identifiers 2018-01-03 18:36:22 +01:00
mach-footbridge Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2017-11-13 17:56:58 -08:00
mach-gemini License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mach-highbank License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mach-hisi License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mach-imx ARM: imx: remove unused imx3 pm definitions 2017-12-26 16:30:20 +08:00
mach-integrator ARM: SoC platform updates for 4.15 2017-11-16 14:05:12 -08:00
mach-iop13xx License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mach-iop32x treewide: setup_timer() -> timer_setup() 2017-11-21 15:57:07 -08:00
mach-iop33x License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mach-ixp4xx w1: w1-gpio: Convert to use GPIO descriptors 2017-12-08 15:32:53 +01:00
mach-keystone License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mach-ks8695 Merge branch 'i2c/for-4.15' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2017-11-14 17:52:21 -08:00
mach-lpc18xx
mach-lpc32xx
mach-mediatek ARM: mediatek: use more generic prompts for SoCs with ARMv7 2017-12-20 15:48:18 +01:00
mach-meson Amlogic 32-bit DT changes for v4.16 2017-12-21 16:37:34 +01:00
mach-mmp ARM: pxa: move header file out of I2C realm 2017-11-28 22:49:30 +01:00
mach-moxart
mach-mv78xx0 License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mach-mvebu PCI: Move OF-related PCI functions into PCI core 2018-01-17 17:36:39 -06:00
mach-mxs ARM: mxs: constify platform_suspend_ops 2017-09-20 22:21:08 +08:00
mach-netx
mach-nomadik
mach-nspire
mach-omap1 ARM: SoC platform updates for 4.15 2017-11-16 14:05:12 -08:00
mach-omap2 ARM: SoC driver updates for 4.16 2018-02-01 16:35:31 -08:00
mach-orion5x treewide: setup_timer() -> timer_setup() 2017-11-21 15:57:07 -08:00
mach-oxnas
mach-picoxcell
mach-prima2 License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mach-pxa ARM: SoC platform updates for 4.16 2018-02-01 16:17:40 -08:00
mach-qcom
mach-realview
mach-rockchip Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm 2017-09-12 06:10:44 -07:00
mach-rpc License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mach-s3c24xx ARM: S3C24XX: Add SPDX license identifiers 2018-01-03 18:36:43 +01:00
mach-s3c64xx ARM: S3C64XX: Add SPDX license identifiers 2018-01-03 18:42:53 +01:00
mach-s5pv210 ARM: S5PV210: Add SPDX license identifiers 2018-01-03 18:43:04 +01:00
mach-sa1100 ARM: sa1100/neponset: add GPIO drivers for control and modem registers 2018-01-01 00:50:05 +00:00
mach-shmobile ARM: SoC platform updates for 4.15 2017-11-16 14:05:12 -08:00
mach-socfpga License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mach-spear License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mach-sti
mach-stm32
mach-sunxi ARM: sunxi: add support for R40 SoC 2017-09-22 21:57:09 +02:00
mach-tango License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mach-tegra Merge branch 'linus' into locking/core, to resolve conflicts 2017-11-07 10:32:44 +01:00
mach-u300 License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mach-uniphier kbuild: remove all dummy assignments to obj- 2017-11-18 11:46:06 +09:00
mach-ux500 ARM: ux500: remove PMU IRQ bouncer 2018-02-20 11:34:53 +00:00
mach-versatile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mach-vexpress ARM: SoC platform updates for 4.15 2017-11-16 14:05:12 -08:00
mach-vt8500 arm: vt8500: kconfig: Remove blank help text 2018-02-02 23:53:10 +09:00
mach-w90x900 License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mach-zx License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mach-zynq License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mm Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm 2018-02-02 09:50:51 -08:00
net bpf, arm: remove obsolete exception handling from div/mod 2018-01-26 16:42:07 -08:00
nwfpe License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
oprofile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
plat-iop License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
plat-omap ARM: SoC platform updates for 4.15 2017-11-16 14:05:12 -08:00
plat-orion
plat-pxa
plat-samsung ARM: SAMSUNG: Add SPDX license identifiers 2018-01-03 18:43:13 +01:00
plat-versatile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
probes ARM: probes: avoid adding kprobes to sensitive kernel-entry/exit code 2017-12-17 22:14:21 +00:00
tools ARM: ep93xx: ts72xx: Add support for BK3 board - ts72xx derivative 2017-12-13 22:26:10 +01:00
vdso Merge branch 'linus' into locking/core, to resolve conflicts 2017-11-07 10:32:44 +01:00
vfp signal/arm: Document conflicts with SI_USER and SIGFPE 2018-01-12 14:21:05 -06:00
xen xen: re-introduce support for grant v2 interface 2017-11-06 15:50:17 -05:00
Kconfig Currently, hardened usercopy performs dynamic bounds checking on slab 2018-02-03 16:25:42 -08:00
Kconfig-nommu Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm 2017-11-16 12:50:35 -08:00
Kconfig.debug ARM: 8737/1: mm: dump: add checking for writable and executable 2018-01-21 15:32:20 +00:00
Makefile ARM: 8723/2: always assume the "unified" syntax for assembly code 2017-12-17 22:14:21 +00:00