linux_dsm_epyc7002/arch/arm/kvm
Jintack Lim 488f94d721 KVM: arm64: Access CNTHCTL_EL2 bit fields correctly on VHE systems
Current KVM world switch code is unintentionally setting wrong bits to
CNTHCTL_EL2 when E2H == 1, which may allow guest OS to access physical
timer.  Bit positions of CNTHCTL_EL2 are changing depending on
HCR_EL2.E2H bit.  EL1PCEN and EL1PCTEN are 1st and 0th bits when E2H is
not set, but they are 11th and 10th bits respectively when E2H is set.

In fact, on VHE we only need to set those bits once, not for every world
switch. This is because the host kernel runs in EL2 with HCR_EL2.TGE ==
1, which makes those bits have no effect for the host kernel execution.
So we just set those bits once for guests, and that's it.

Signed-off-by: Jintack Lim <jintack@cs.columbia.edu>
Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2017-01-13 11:19:25 +00:00
..
hyp arm/arm64: KVM: Perform local TLB invalidation when multiplexing vcpus on a single CPU 2016-11-04 17:56:28 +00:00
arm.c KVM: arm64: Access CNTHCTL_EL2 bit fields correctly on VHE systems 2017-01-13 11:19:25 +00:00
coproc_a7.c arm/arm64: KVM: Use set/way op trapping to track the state of the caches 2015-01-29 23:24:56 +01:00
coproc_a15.c arm/arm64: KVM: Use set/way op trapping to track the state of the caches 2015-01-29 23:24:56 +01:00
coproc.c ARM: KVM: Support vgic-v3 2016-09-22 13:22:21 +02:00
coproc.h ARM: KVM: Rename struct coproc_reg::is_64 to is_64bit 2016-02-29 18:34:22 +00:00
emulate.c arm: KVM: Add Virtual Abort injection helper 2016-09-08 12:53:00 +02:00
guest.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
handle_exit.c arm: KVM: Drop unreachable HYP abort handlers 2016-09-08 12:53:00 +02:00
init.S arm: KVM: Allow hyp teardown 2016-07-03 23:41:27 +02:00
interrupts.S ARM: KVM: Remove the old world switch 2016-02-29 18:34:14 +00:00
irq.h KVM: arm/arm64: Enable irqchip routing 2016-07-22 18:52:01 +01:00
Kconfig ARM: KVM: Support vGICv3 ITS 2016-11-14 10:32:54 +00:00
Makefile ARM: KVM: Support vGICv3 ITS 2016-11-14 10:32:54 +00:00
mmio.c arm/arm64: KVM: Remove external abort test from MMIO handling 2016-09-08 12:53:00 +02:00
mmu.c KVM updates for v4.9-rc1 2016-10-06 10:49:01 -07:00
perf.c
psci.c KVM: Use simple waitqueue for vcpu->wq 2016-02-25 11:27:16 +01:00
reset.c KVM: ARM: Fix typos 2016-06-14 11:16:26 +02:00
trace.h arm/arm64: KVM: Improve kvm_exit tracepoint 2015-10-22 23:01:47 +02:00