qemu/target-arm
Christoffer Dall 4b7a6bf402 target-arm: kvm: Differentiate registers based on write-back levels
Some registers like the CNTVCT register should only be written to the
kernel as part of machine initialization or on vmload operations, but
never during runtime, as this can potentially make time go backwards or
create inconsistent time observations between VCPUs.

Introduce a list of registers that should not be written back at runtime
and check this list on syncing the register state to the KVM state.

Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Message-id: 1437046488-10773-1-git-send-email-christoffer.dall@linaro.org
[PMM: tweaked a few comments, added the new argument to the stub
 write_list_to_kvmstate() in target-arm/kvm-stub.c]
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2015-07-21 11:18:45 +01:00
..
arm_ldst.h
arm-semi.c
cpu64.c
cpu-qom.h
cpu.c disas: arm: QOMify target specific disas setup 2015-07-09 15:20:41 +02:00
cpu.h cpu-exec: Purge all uses of ENV_GET_CPU() 2015-07-09 15:20:40 +02:00
crypto_helper.c crypto: move built-in AES implementation into crypto/ 2015-07-07 12:04:13 +02:00
gdbstub64.c
gdbstub.c
helper-a64.c
helper-a64.h
helper.c target-arm: Fix broken SCTLR_EL3 reset 2015-07-15 17:16:26 +01:00
helper.h target-arm: Split DISAS_YIELD from DISAS_WFE 2015-07-06 10:05:44 +01:00
internals.h
iwmmxt_helper.c
kvm32.c target-arm: kvm: Differentiate registers based on write-back levels 2015-07-21 11:18:45 +01:00
kvm64.c target-arm: kvm: Differentiate registers based on write-back levels 2015-07-21 11:18:45 +01:00
kvm_arm.h target-arm: kvm: Differentiate registers based on write-back levels 2015-07-21 11:18:45 +01:00
kvm-consts.h
kvm-stub.c target-arm: kvm: Differentiate registers based on write-back levels 2015-07-21 11:18:45 +01:00
kvm.c target-arm: kvm: Differentiate registers based on write-back levels 2015-07-21 11:18:45 +01:00
machine.c target-arm: kvm: Differentiate registers based on write-back levels 2015-07-21 11:18:45 +01:00
Makefile.objs
neon_helper.c
op_addsub.h
op_helper.c target-arm: Split DISAS_YIELD from DISAS_WFE 2015-07-06 10:05:44 +01:00
psci.c
translate-a64.c target-arm: Split DISAS_YIELD from DISAS_WFE 2015-07-06 10:05:44 +01:00
translate.c target-arm: Implement YIELD insn to yield in ARM and Thumb translators 2015-07-06 10:05:44 +01:00
translate.h target-arm: Split DISAS_YIELD from DISAS_WFE 2015-07-06 10:05:44 +01:00