kernel/linux.git/arch/arm/include/asm/kvm_emulate.h, branch linux-4.16.y

KVM: arm/arm64: Fix trailing semicolon

2018-01-23T15:48:32+00:00

The trailing semicolon is an empty statement that does no operation. Removing it since it doesn't do anything. Signed-off-by: Luis de Bethencourt Signed-off-by: Christoffer Dall

KVM: arm/arm64: fix the incompatible matching for external abort

2017-11-06T15:23:20+00:00

kvm_vcpu_dabt_isextabt() tries to match a full fault syndrome, but calls kvm_vcpu_trap_get_fault_type() that only returns the fault class, thus reducing the scope of the check. This doesn't cause any observable bug yet as we end-up matching a closely related syndrome for which we return the same value. Using kvm_vcpu_trap_get_fault() instead fixes it for good. Signed-off-by: Dongjiu Geng Acked-by: Marc Zyngier Signed-off-by: Christoffer Dall

KVM: arm/arm64: Unify 32bit fault injection

2017-11-06T15:23:20+00:00

Both arm and arm64 implementations are capable of injecting faults, and yet have completely divergent implementations, leading to different bugs and reduced maintainability. Let's elect the arm64 version as the canonical one and move it into aarch32.c, which is common to both architectures. Reviewed-by: Christoffer Dall Signed-off-by: Marc Zyngier Signed-off-by: Christoffer Dall

KVM: arm/arm64: Fix guest external abort matching

2017-09-05T15:33:37+00:00

The ARM-ARM has two bits in the ESR/HSR relevant to external aborts. A range of {I,D}FSC values (of which bit 5 is always set) and bit 9 'EA' which provides: > an IMPLEMENTATION DEFINED classification of External Aborts. This bit is in addition to the {I,D}FSC range, and has an implementation defined meaning. KVM should always ignore this bit when handling external aborts from a guest. Remove the ESR_ELx_EA definition and rewrite its helper kvm_vcpu_dabt_isextabt() to check the {I,D}FSC range. This merges kvm_vcpu_dabt_isextabt() and the recently added is_abort_sea() helper. CC: Tyler Baicar Reported-by: gengdongjiu Signed-off-by: James Morse Signed-off-by: Marc Zyngier Signed-off-by: Christoffer Dall

arm: KVM: Add Virtual Abort injection helper

2016-09-08T10:53:00+00:00

Now that we're able to context switch the HCR.VA bit, let's introduce a helper that injects an Abort into a vcpu. Signed-off-by: Marc Zyngier Signed-off-by: Christoffer Dall

arm: KVM: Use common AArch32 conditional execution code

2016-09-08T10:53:00+00:00

Add the bit of glue and const-ification that is required to use the code inherited from the arm64 port, and move over to it. Signed-off-by: Marc Zyngier Signed-off-by: Christoffer Dall

arm/arm64: KVM: Handle out-of-RAM cache maintenance as a NOP

2016-02-29T18:34:15+00:00

So far, our handling of cache maintenance by VA has been pretty simple: Either the access is in the guest RAM and generates a S2 fault, which results in the page being mapped RW, or we go down the io_mem_abort() path, and nuke the guest. The first one is fine, but the second one is extremely weird. Treating the CM as an I/O is wrong, and nothing in the ARM ARM indicates that we should generate a fault for something that cannot end-up in the cache anyway (even if the guest maps it, it will keep on faulting at stage-2 for emulation). So let's just skip this instruction, and let the guest get away with it. Reviewed-by: Christoffer Dall Signed-off-by: Marc Zyngier

ARM: KVM: Remove unused hyp_pc field

2016-02-29T18:34:15+00:00

This field was never populated, and the panic code already does something similar. Delete the related code. Acked-by: Christoffer Dall Signed-off-by: Marc Zyngier

ARM: KVM: Move GP registers into the CPU context structure

2016-02-29T18:34:12+00:00

Continuing our rework of the CPU context, we now move the GP registers into the CPU context structure. Reviewed-by: Christoffer Dall Signed-off-by: Marc Zyngier

ARM: KVM: Move CP15 array into the CPU context structure

2016-02-29T18:34:12+00:00

Continuing our rework of the CPU context, we now move the CP15 array into the CPU context structure. As this causes quite a bit of churn, we introduce the vcpu_cp15() macro that abstract the location of the actual array. This will probably help next time we have to revisit that code. Reviewed-by: Christoffer Dall Signed-off-by: Marc Zyngier