linux/arch/arm64/kvm
Christoffer Dall 52f6c4f021 KVM: arm64: Change 32-bit handling of VM system registers
We currently handle 32-bit accesses to trapped VM system registers using
the 32-bit index into the coproc array on the vcpu structure, which is a
union of the coproc array and the sysreg array.

Since all the 32-bit coproc indices are created to correspond to the
architectural mapping between 64-bit system registers and 32-bit
coprocessor registers, and because the AArch64 system registers are the
double in size of the AArch32 coprocessor registers, we can always find
the system register entry that we must update by dividing the 32-bit
coproc index by 2.

This is going to make our lives much easier when we have to start
accessing system registers that use deferred save/restore and might
have to be read directly from the physical CPU.

Reviewed-by: Andrew Jones <drjones@redhat.com>
Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2018-03-19 10:53:16 +00:00
..
hyp KVM: arm64: Don't save the host ELR_EL2 and SPSR_EL2 on VHE systems 2018-03-19 10:53:16 +00:00
debug.c KVM: arm64: Move debug dirty flag calculation out of world switch 2018-03-19 10:53:11 +00:00
guest.c KVM: arm/arm64: Avoid vcpu_load for other vcpu ioctls than KVM_RUN 2018-03-19 10:53:09 +00:00
handle_exit.c arm/arm64: KVM: Advertise SMCCC v1.1 2018-02-06 22:54:01 +00:00
hyp-init.S arm64: assembler: Change order of macro arguments in phys_to_ttbr 2018-02-06 22:53:21 +00:00
hyp.S arm64: hyp-stub/KVM: Kill __hyp_get_vectors 2017-04-09 07:49:34 -07:00
inject_fault.c KVM: arm/arm64: Introduce vcpu_el1_is_32bit 2018-03-19 10:53:11 +00:00
irq.h KVM: arm/arm64: Enable irqchip routing 2016-07-22 18:52:01 +01:00
Kconfig GICv4 Support for KVM/ARM for v4.15 2017-11-17 13:20:01 +01:00
Makefile GICv4 Support for KVM/ARM for v4.15 2017-11-17 13:20:01 +01:00
regmap.c arm64: KVM: 32bit GP register access 2013-06-12 16:42:14 +01:00
reset.c KVM: arm/arm64: Move timer IRQ default init to arch_timer.c 2017-06-08 16:59:56 +02:00
sys_regs_generic_v8.c KVM: arm64: Use common sysreg definitions 2017-03-22 18:38:26 +00:00
sys_regs.c KVM: arm64: Change 32-bit handling of VM system registers 2018-03-19 10:53:16 +00:00
sys_regs.h Merge remote-tracking branch 'rutland/kvm/common-sysreg' into next-fix 2017-04-09 07:50:34 -07:00
trace.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
vgic-sys-reg-v3.c KVM: arm/arm64: Extract GICv3 max APRn index calculation 2017-09-05 17:33:39 +02:00