kernel/arch/arm/kvm/guest.c, branch linux-4.15.y

KVM: arm/arm64: Allow setting the timer IRQ numbers from userspace

2017-06-08T14:59:57Z

First we define an ABI using the vcpu devices that lets userspace set the interrupt numbers for the various timers on both the 32-bit and 64-bit KVM/ARM implementations. Second, we add the definitions for the groups and attributes introduced by the above ABI. (We add the PMU define on the 32-bit side as well for symmetry and it may get used some day.) Third, we set up the arch-specific vcpu device operation handlers to call into the timer code for anything related to the KVM_ARM_VCPU_TIMER_CTRL group. Fourth, we implement support for getting and setting the timer interrupt numbers using the above defined ABI in the arch timer code. Fifth, we introduce error checking upon enabling the arch timer (which is called when first running a VCPU) to check that all VCPUs are configured to use the same PPI for the timer (as mandated by the architecture) and that the virtual and physical timers are not configured to use the same IRQ number. Signed-off-by: Christoffer Dall Reviewed-by: Marc Zyngier

KVM: arm: Handle VCPU device attributes in guest.c

2017-06-08T14:59:55Z

As we are about to support VCPU attributes to set the timer IRQ numbers in guest.c, move the static inlines for the VCPU attributes handlers from the header file to guest.c. Signed-off-by: Christoffer Dall Acked-by: Marc Zyngier

Replace with globally

2016-12-24T19:46:01Z

This was entirely automated, using the script by Al: PATT='^[[:blank:]]*#[[:blank:]]*include[[:blank:]]*' sed -i -e "s!$PATT!#include !" \ $(git grep -l "$PATT"|grep -v ^include/linux/uaccess.h) to do the replacement at the end of the merge window. Requested-by: Al Viro Signed-off-by: Linus Torvalds

KVM: ARM: Fix typos

2016-06-14T09:16:26Z

Signed-off-by: Andrea Gelmini Signed-off-by: Paolo Bonzini

Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

2016-03-16T16:55:35Z

Pull KVM updates from Paolo Bonzini: "One of the largest releases for KVM... Hardly any generic changes, but lots of architecture-specific updates. ARM: - VHE support so that we can run the kernel at EL2 on ARMv8.1 systems - PMU support for guests - 32bit world switch rewritten in C - various optimizations to the vgic save/restore code. PPC: - enabled KVM-VFIO integration ("VFIO device") - optimizations to speed up IPIs between vcpus - in-kernel handling of IOMMU hypercalls - support for dynamic DMA windows (DDW). s390: - provide the floating point registers via sync regs; - separated instruction vs. data accesses - dirty log improvements for huge guests - bugfixes and documentation improvements. x86: - Hyper-V VMBus hypercall userspace exit - alternative implementation of lowest-priority interrupts using vector hashing (for better VT-d posted interrupt support) - fixed guest debugging with nested virtualizations - improved interrupt tracking in the in-kernel IOAPIC - generic infrastructure for tracking writes to guest memory - currently its only use is to speedup the legacy shadow paging (pre-EPT) case, but in the future it will be used for virtual GPUs as well - much cleanup (LAPIC, kvmclock, MMU, PIT), including ubsan fixes" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (217 commits) KVM: x86: remove eager_fpu field of struct kvm_vcpu_arch KVM: x86: disable MPX if host did not enable MPX XSAVE features arm64: KVM: vgic-v3: Only wipe LRs on vcpu exit arm64: KVM: vgic-v3: Reset LRs at boot time arm64: KVM: vgic-v3: Do not save an LR known to be empty arm64: KVM: vgic-v3: Save maintenance interrupt state only if required arm64: KVM: vgic-v3: Avoid accessing ICH registers KVM: arm/arm64: vgic-v2: Make GICD_SGIR quicker to hit KVM: arm/arm64: vgic-v2: Only wipe LRs on vcpu exit KVM: arm/arm64: vgic-v2: Reset LRs at boot time KVM: arm/arm64: vgic-v2: Do not save an LR known to be empty KVM: arm/arm64: vgic-v2: Move GICH_ELRSR saving to its own function KVM: arm/arm64: vgic-v2: Save maintenance interrupt state only if required KVM: arm/arm64: vgic-v2: Avoid accessing GICH registers KVM: s390: allocate only one DMA page per VM KVM: s390: enable STFLE interpretation only if enabled for the guest KVM: s390: wake up when the VCPU cpu timer expires KVM: s390: step the VCPU timer while in enabled wait KVM: s390: protect VCPU cpu timer with a seqcount KVM: s390: step VCPU cpu timer during kvm_run ioctl ...

ARM: KVM: Turn CP15 defines to an enum

2016-02-29T18:34:15Z

Just like on arm64, having the CP15 registers expressed as a set of #defines has been very conflict-prone. Let's turn it into an enum, which should make it more manageable. Acked-by: Christoffer Dall Signed-off-by: Marc Zyngier

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

2016-02-29T18:34:12Z

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/arm64: KVM: Fix ioctl error handling

2016-02-29T09:56:40Z

Calling return copy_to_user(...) in an ioctl will not do the right thing if there's a pagefault: copy_to_user returns the number of bytes not copied in this case. Fix up kvm to do return copy_to_user(...)) ? -EFAULT : 0; everywhere. Cc: stable@vger.kernel.org Acked-by: Christoffer Dall Signed-off-by: Michael S. Tsirkin Signed-off-by: Marc Zyngier

KVM: arm/arm64: Count guest exit due to various reasons

2015-12-14T11:30:00Z

It would add guest exit statistics to debugfs, this can be helpful while measuring KVM performance. [ Renamed some of the field names - Christoffer ] Signed-off-by: Amit Singh Tomar Signed-off-by: Christoffer Dall

KVM: arm: guest debug, add stub KVM_SET_GUEST_DEBUG ioctl

2015-07-21T11:47:08Z

This commit adds a stub function to support the KVM_SET_GUEST_DEBUG ioctl. Any unsupported flag will return -EINVAL. For now, only KVM_GUESTDBG_ENABLE is supported, although it won't have any effects. Signed-off-by: Alex Bennée . Reviewed-by: Christoffer Dall Signed-off-by: Marc Zyngier