kernel.git/arch/arm/include/asm/kvm_emulate.h, branch linux-5.1.y

KVM: arm/arm64: Move kvm_is_write_fault to header file

2019-02-19T21:05:45Z

Move this little function to the header files for arm/arm64 so other code can make use of it directly. Signed-off-by: Christoffer Dall Signed-off-by: Marc Zyngier

Merge tag 'kvmarm-for-v4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD

2018-08-22T12:07:56Z

KVM/arm updates for 4.19 - Support for Group0 interrupts in guests - Cache management optimizations for ARMv8.4 systems - Userspace interface for RAS, allowing error retrival and injection - Fault path optimization - Emulated physical timer fixes - Random cleanups

KVM: arm: Use true and false for boolean values

2018-08-12T11:17:51Z

Return statements in functions returning bool should use true or false instead of an integer value. This code was detected with the help of Coccinelle. Signed-off-by: Gustavo A. R. Silva Signed-off-by: Marc Zyngier

KVM: arm/arm64: Enable adaptative WFE trapping

2018-07-09T10:38:24Z

Trapping blocking WFE is extremely beneficial in situations where the system is oversubscribed, as it allows another thread to run while being blocked. In a non-oversubscribed environment, this is the complete opposite, and trapping WFE is just unnecessary overhead. Let's only enable WFE trapping if the CPU has more than a single task to run (that is, more than just the vcpu thread). Reviewed-by: Christoffer Dall Signed-off-by: Marc Zyngier

kvm/arm: use PSR_AA32 definitions

2018-07-05T16:24:15Z

Some code cares about the SPSR_ELx format for exceptions taken from AArch32 to inspect or manipulate the SPSR_ELx value, which is already in the SPSR_ELx format, and not in the AArch32 PSR format. To separate these from cases where we care about the AArch32 PSR format, migrate these cases to use the PSR_AA32_* definitions rather than COMPAT_PSR_*. There should be no functional change as a result of this patch. Note that arm64 KVM does not support a compat KVM API, and always uses the SPSR_ELx format, even for AArch32 guests. Signed-off-by: Mark Rutland Acked-by: Christoffer Dall Acked-by: Marc Zyngier Signed-off-by: Will Deacon

KVM: arm/arm64: Prepare to handle deferred save/restore of SPSR_EL1

2018-03-19T10:53:17Z

SPSR_EL1 is not used by a VHE host kernel and can be deferred, but we need to rework the accesses to this register to access the latest value depending on whether or not guest system registers are loaded on the CPU or only reside in memory. The handling of accessing the various banked SPSRs for 32-bit VMs is a bit clunky, but this will be improved in following patches which will first prepare and subsequently implement deferred save/restore of the 32-bit registers, including the 32-bit SPSRs. Reviewed-by: Marc Zyngier Reviewed-by: Andrew Jones Signed-off-by: Christoffer Dall Signed-off-by: Marc Zyngier

KVM: arm/arm64: Get rid of vcpu->arch.irq_lines

2018-03-19T10:53:10Z

We currently have a separate read-modify-write of the HCR_EL2 on entry to the guest for the sole purpose of setting the VF and VI bits, if set. Since this is most rarely the case (only when using userspace IRQ chip and interrupts are in flight), let's get rid of this operation and instead modify the bits in the vcpu->arch.hcr[_el2] directly when needed. Acked-by: Marc Zyngier Reviewed-by: Andrew Jones Reviewed-by: Julien Thierry Signed-off-by: Christoffer Dall Signed-off-by: Marc Zyngier

KVM: arm/arm64: Fix trailing semicolon

2018-01-23T15:48:32Z

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

2017-11-06T15:23:20Z

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

2017-11-06T15:23:20Z

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