linux_dsm_epyc7002/arch/arm64
James Morse 32b03d1059 KVM: arm64: Store vcpu on the stack during __guest_enter()
KVM uses tpidr_el2 as its private vcpu register, which makes sense for
non-vhe world switch as only KVM can access this register. This means
vhe Linux has to use tpidr_el1, which KVM has to save/restore as part
of the host context.

If the SDEI handler code runs behind KVMs back, it mustn't access any
per-cpu variables. To allow this on systems with vhe we need to make
the host use tpidr_el2, saving KVM from save/restoring it.

__guest_enter() stores the host_ctxt on the stack, do the same with
the vcpu.

Signed-off-by: James Morse <james.morse@arm.com>
Reviewed-by: Christoffer Dall <cdall@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2018-01-13 10:44:04 +00:00
..
boot Amlogic fixes for v4.15-rc 2017-12-09 20:23:29 -08:00
configs arm64: defconfig: enable CONFIG_GPIO_UNIPHIER 2017-10-30 14:41:54 +01:00
crypto License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
include Merge branch 'for-next/perf' of git://git.kernel.org/pub/scm/linux/kernel/git/will/linux 2018-01-12 14:33:56 +00:00
kernel Merge branch 'for-next/perf' of git://git.kernel.org/pub/scm/linux/kernel/git/will/linux 2018-01-12 14:33:56 +00:00
kvm KVM: arm64: Store vcpu on the stack during __guest_enter() 2018-01-13 10:44:04 +00:00
lib arm64: make label allocation style consistent in tishift 2018-01-02 14:22:18 +00:00
mm arm64: Add skeleton to harden the branch predictor against aliasing attacks 2018-01-08 18:45:25 +00:00
net bpf, arm64: implement jiting of BPF_J{LT, LE, SLT, SLE} 2017-08-09 16:53:56 -07:00
xen arm64: mm: Fix and re-enable ARM64_SW_TTBR0_PAN 2017-12-11 13:40:35 +00:00
Kconfig arm64: Add skeleton to harden the branch predictor against aliasing attacks 2018-01-08 18:45:25 +00:00
Kconfig.debug arm64: relocation testing module 2017-04-04 17:03:32 +01:00
Kconfig.platforms ARM: SoC driver updates for v4.15 2017-11-16 16:05:01 -08:00
Makefile arm64: ftrace: emit ftrace-mod.o contents through code 2017-12-01 13:04:59 +00:00