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path: root/arch/arm/include/asm/kvm_emulate.h
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2013-11-11Merge tag 'kvm-arm64/for-3.13-1' of ↵Paolo Bonzini
git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms into kvm-next A handful of fixes for KVM/arm64: - A couple a basic fixes for running BE guests on a LE host - A performance improvement for overcommitted VMs (same as the equivalent patch for ARM) Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Conflicts: arch/arm/include/asm/kvm_emulate.h arch/arm64/include/asm/kvm_emulate.h
2013-11-07arm/arm64: KVM: PSCI: propagate caller endianness to the incoming vcpuMarc Zyngier
When booting a vcpu using PSCI, make sure we start it with the endianness of the caller. Otherwise, secondaries can be pretty unhappy to execute a BE kernel in LE mode... This conforms to PSCI spec Rev B, 5.13.3. Acked-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-11-07arm/arm64: KVM: MMIO support for BE guestMarc Zyngier
Do the necessary byteswap when host and guest have different views of the universe. Actually, the only case we need to take care of is when the guest is BE. All the other cases are naturally handled. Also be careful about endianness when the data is being memcopy-ed from/to the run buffer. Acked-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-10-22arm/arm64: KVM: PSCI: use MPIDR to identify a target CPUMarc Zyngier
The KVM PSCI code blindly assumes that vcpu_id and MPIDR are the same thing. This is true when vcpus are organized as a flat topology, but is wrong when trying to emulate any other topology (such as A15 clusters). Change the KVM PSCI CPU_ON code to look at the MPIDR instead of the vcpu_id to pick a target CPU. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
2013-06-26ARM: KVM: don't special case PC when doing an MMIOMarc Zyngier
Admitedly, reading a MMIO register to load PC is very weird. Writing PC to a MMIO register is probably even worse. But the architecture doesn't forbid any of these, and injecting a Prefetch Abort is the wrong thing to do anyway. Remove this check altogether, and let the adventurous guest wander into LaLaLand if they feel compelled to do so. Reported-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <cdall@cs.columbia.edu>
2013-03-06ARM: KVM: move kvm_handle_wfi to handle_exit.cMarc Zyngier
It has little to do in emulate.c these days... Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-03-06KVM: ARM: Reintroduce trace_kvm_hvcChristoffer Dall
This one got lost in the move to handle_exit, so let's reintroduce it using an accessor to the immediate value field like the other ones. Signed-off-by: Christoffer Dall <cdall@cs.columbia.edu>
2013-03-06ARM: KVM: move kvm_condition_valid to emulate.cMarc Zyngier
This is really hardware emulation, and as such it better be with its little friends. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-03-06ARM: KVM: abstract HSR_EC_IABT awayMarc Zyngier
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-03-06ARM: KVM: abstract fault decoding awayMarc Zyngier
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-03-06ARM: KVM: abstract exception class decoding awayMarc Zyngier
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-03-06ARM: KVM: abstract IL decoding awayMarc Zyngier
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <cdall@cs.columbia.edu>
2013-03-06ARM: KVM: abstract SAS decoding awayMarc Zyngier
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <cdall@cs.columbia.edu>
2013-03-06ARM: KVM: abstract S1TW abort detection awayMarc Zyngier
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <cdall@cs.columbia.edu>
2013-03-06ARM: KVM: abstract (and fix) external abort detection awayMarc Zyngier
Bit 8 is cache maintenance, bit 9 is external abort. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <cdall@cs.columbia.edu>
2013-03-06ARM: KVM: abstract HSR_SRT_{MASK,SHIFT} awayMarc Zyngier
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-03-06ARM: KVM: abstract HSR_SSE awayMarc Zyngier
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <cdall@cs.columbia.edu>
2013-03-06ARM: KVM: abstract HSR_WNR awayMarc Zyngier
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <cdall@cs.columbia.edu>
2013-03-06ARM: KVM: abstract HSR_ISV awayMarc Zyngier
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <cdall@cs.columbia.edu>
2013-03-06ARM: KVM: abstract fault register accessesMarc Zyngier
Instead of directly accessing the fault registers, use proper accessors so the core code can be shared. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-03-06ARM: KVM: convert GP registers from u32 to unsigned longMarc Zyngier
On 32bit ARM, unsigned long is guaranteed to be a 32bit quantity. On 64bit ARM, it is a 64bit quantity. In order to be able to share code between the two architectures, convert the registers to be unsigned long, so the core code can be oblivious of the change. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-01-23KVM: ARM: Power State Coordination Interface implementationMarc Zyngier
Implement the PSCI specification (ARM DEN 0022A) to control virtual CPUs being "powered" on or off. PSCI/KVM is detected using the KVM_CAP_ARM_PSCI capability. A virtual CPU can now be initialized in a "powered off" state, using the KVM_ARM_VCPU_POWER_OFF feature flag. The guest can use either SMC or HVC to execute a PSCI function. Reviewed-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <c.dall@virtualopensystems.com>
2013-01-23KVM: ARM: Handle I/O abortsChristoffer Dall
When the guest accesses I/O memory this will create data abort exceptions and they are handled by decoding the HSR information (physical address, read/write, length, register) and forwarding reads and writes to QEMU which performs the device emulation. Certain classes of load/store operations do not support the syndrome information provided in the HSR. We don't support decoding these (patches are available elsewhere), so we report an error to user space in this case. This requires changing the general flow somewhat since new calls to run the VCPU must check if there's a pending MMIO load and perform the write after userspace has made the data available. Reviewed-by: Will Deacon <will.deacon@arm.com> Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <c.dall@virtualopensystems.com>
2013-01-23KVM: ARM: Emulation framework and CP15 emulationChristoffer Dall
Adds a new important function in the main KVM/ARM code called handle_exit() which is called from kvm_arch_vcpu_ioctl_run() on returns from guest execution. This function examines the Hyp-Syndrome-Register (HSR), which contains information telling KVM what caused the exit from the guest. Some of the reasons for an exit are CP15 accesses, which are not allowed from the guest and this commit handles these exits by emulating the intended operation in software and skipping the guest instruction. Minor notes about the coproc register reset: 1) We reserve a value of 0 as an invalid cp15 offset, to catch bugs in our table, at cost of 4 bytes per vcpu. 2) Added comments on the table indicating how we handle each register, for simplicity of understanding. Reviewed-by: Will Deacon <will.deacon@arm.com> Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Christoffer Dall <c.dall@virtualopensystems.com>
2013-01-23KVM: ARM: Initial skeleton to compile KVM supportChristoffer Dall
Targets KVM support for Cortex A-15 processors. Contains all the framework components, make files, header files, some tracing functionality, and basic user space API. Only supported core is Cortex-A15 for now. Most functionality is in arch/arm/kvm/* or arch/arm/include/asm/kvm_*.h. Reviewed-by: Will Deacon <will.deacon@arm.com> Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <c.dall@virtualopensystems.com>
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