diff options
| author | Marc Zyngier <marc.zyngier@arm.com> | 2014-01-14 18:00:55 +0000 |
|---|---|---|
| committer | Marc Zyngier <marc.zyngier@arm.com> | 2014-03-03 01:15:24 +0000 |
| commit | 8034699a42d68043b495c7e0cfafccd920707ec8 (patch) | |
| tree | 25fbae0371d43ca1a2edd7f876e6c80b5ccbec29 /arch/arm/include/asm | |
| parent | af20814ee927ed888288d98917a766b4179c4fe0 (diff) | |
ARM: KVM: trap VM system registers until MMU and caches are ON
In order to be able to detect the point where the guest enables
its MMU and caches, trap all the VM related system registers.
Once we see the guest enabling both the MMU and the caches, we
can go back to a saner mode of operation, which is to leave these
registers in complete control of the guest.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
Diffstat (limited to 'arch/arm/include/asm')
| -rw-r--r-- | arch/arm/include/asm/kvm_arm.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/arm/include/asm/kvm_arm.h b/arch/arm/include/asm/kvm_arm.h index a843e74a384c..816db0bf2dd8 100644 --- a/arch/arm/include/asm/kvm_arm.h +++ b/arch/arm/include/asm/kvm_arm.h @@ -55,6 +55,7 @@ * The bits we set in HCR: * TAC: Trap ACTLR * TSC: Trap SMC + * TVM: Trap VM ops (until MMU and caches are on) * TSW: Trap cache operations by set/way * TWI: Trap WFI * TWE: Trap WFE @@ -68,7 +69,7 @@ */ #define HCR_GUEST_MASK (HCR_TSC | HCR_TSW | HCR_TWI | HCR_VM | HCR_BSU_IS | \ HCR_FB | HCR_TAC | HCR_AMO | HCR_IMO | HCR_FMO | \ - HCR_TWE | HCR_SWIO | HCR_TIDCP) + HCR_TVM | HCR_TWE | HCR_SWIO | HCR_TIDCP) /* System Control Register (SCTLR) bits */ #define SCTLR_TE (1 << 30) |