On Fri, Apr 21, 2023 at 12:40 PM Marc Zyngier <maz@xxxxxxxxxx> wrote:
>
> Hi Paolo,
>
> Here's the initial set of changes for KVM/arm64. A bunch of
> infrastructure changes this time around, with two new user
> visible changes (hypercall forwarding to userspace, global counter
> offset) and a large set of locking inversion fixes.
>
> The remaining of the patches contain the NV timer emulation code, and
> a small set of less important fixes/improvements.
>
> Please pull,
Queued, thanks! I assume I'll get -rc pull requests from you as well
over the next two months?
Paolo
> M.
>
> The following changes since commit 197b6b60ae7bc51dd0814953c562833143b292aa:
>
> Linux 6.3-rc4 (2023-03-26 14:40:20 -0700)
>
> are available in the Git repository at:
>
> git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm.git tags/kvmarm-6.4
>
> for you to fetch changes up to 36fe1b29b3cae48f781011abd5a0b9e938f5b35f:
>
> Merge branch kvm-arm64/spec-ptw into kvmarm-master/next (2023-04-21 09:44:58 +0100)
>
> ----------------------------------------------------------------
> KVM/arm64 updates for 6.4
>
> - Numerous fixes for the pathological lock inversion issue that
> plagued KVM/arm64 since... forever.
>
> - New framework allowing SMCCC-compliant hypercalls to be forwarded
> to userspace, hopefully paving the way for some more features
> being moved to VMMs rather than be implemented in the kernel.
>
> - Large rework of the timer code to allow a VM-wide offset to be
> applied to both virtual and physical counters as well as a
> per-timer, per-vcpu offset that complements the global one.
> This last part allows the NV timer code to be implemented on
> top.
>
> - A small set of fixes to make sure that we don't change anything
> affecting the EL1&0 translation regime just after having having
> taken an exception to EL2 until we have executed a DSB. This
> ensures that speculative walks started in EL1&0 have completed.
>
> - The usual selftest fixes and improvements.
>
> ----------------------------------------------------------------
> Colin Ian King (1):
> KVM: selftests: Fix spelling mistake "KVM_HYPERCAL_EXIT_SMC" -> "KVM_HYPERCALL_EXIT_SMC"
>
> Marc Zyngier (33):
> KVM: arm64: timers: Use a per-vcpu, per-timer accumulator for fractional ns
> arm64: Add CNTPOFF_EL2 register definition
> arm64: Add HAS_ECV_CNTPOFF capability
> KVM: arm64: timers: Use CNTPOFF_EL2 to offset the physical timer
> KVM: arm64: timers: Allow physical offset without CNTPOFF_EL2
> KVM: arm64: Expose {un,}lock_all_vcpus() to the rest of KVM
> KVM: arm64: timers: Allow userspace to set the global counter offset
> KVM: arm64: timers: Allow save/restoring of the physical timer
> KVM: arm64: timers: Rationalise per-vcpu timer init
> KVM: arm64: timers: Abstract per-timer IRQ access
> KVM: arm64: timers: Move the timer IRQs into arch_timer_vm_data
> KVM: arm64: Elide kern_hyp_va() in VHE-specific parts of the hypervisor
> KVM: arm64: timers: Fast-track CNTPCT_EL0 trap handling
> KVM: arm64: timers: Abstract the number of valid timers per vcpu
> KVM: arm64: Document KVM_ARM_SET_CNT_OFFSETS and co
> KVM: arm64: nv: timers: Add a per-timer, per-vcpu offset
> KVM: arm64: nv: timers: Support hyp timer emulation
> KVM: arm64: selftests: Add physical timer registers to the sysreg list
> KVM: arm64: selftests: Deal with spurious timer interrupts
> KVM: arm64: selftests: Augment existing timer test to handle variable offset
> KVM: arm64: Expose SMC/HVC width to userspace
> KVM: arm64: nvhe: Synchronise with page table walker on vcpu run
> KVM: arm64: Handle 32bit CNTPCTSS traps
> KVM: arm64: nvhe: Synchronise with page table walker on TLBI
> KVM: arm64: pkvm: Document the side effects of kvm_flush_dcache_to_poc()
> KVM: arm64: vhe: Synchronise with page table walker on MMU update
> KVM: arm64: vhe: Drop extra isb() on guest exit
> Merge branch kvm-arm64/lock-inversion into kvmarm-master/next
> Merge branch kvm-arm64/timer-vm-offsets into kvmarm-master/next
> Merge branch kvm-arm64/selftest/lpa into kvmarm-master/next
> Merge branch kvm-arm64/selftest/misc-6.4 into kvmarm-master/next
> Merge branch kvm-arm64/smccc-filtering into kvmarm-master/next
> Merge branch kvm-arm64/spec-ptw into kvmarm-master/next
>
> Mark Brown (1):
> KVM: selftests: Comment newly defined aarch64 ID registers
>
> Oliver Upton (20):
> KVM: arm64: Avoid vcpu->mutex v. kvm->lock inversion in CPU_ON
> KVM: arm64: Avoid lock inversion when setting the VM register width
> KVM: arm64: Use config_lock to protect data ordered against KVM_RUN
> KVM: arm64: Use config_lock to protect vgic state
> KVM: x86: Redefine 'longmode' as a flag for KVM_EXIT_HYPERCALL
> KVM: arm64: Add a helper to check if a VM has ran once
> KVM: arm64: Add vm fd device attribute accessors
> KVM: arm64: Rename SMC/HVC call handler to reflect reality
> KVM: arm64: Start handling SMCs from EL1
> KVM: arm64: Refactor hvc filtering to support different actions
> KVM: arm64: Use a maple tree to represent the SMCCC filter
> KVM: arm64: Add support for KVM_EXIT_HYPERCALL
> KVM: arm64: Introduce support for userspace SMCCC filtering
> KVM: arm64: Return NOT_SUPPORTED to guest for unknown PSCI version
> KVM: arm64: Let errors from SMCCC emulation to reach userspace
> KVM: selftests: Add a helper for SMCCC calls with SMC instruction
> KVM: selftests: Add test for SMCCC filter
> KVM: arm64: Prevent userspace from handling SMC64 arch range
> KVM: arm64: Test that SMC64 arch calls are reserved
> KVM: arm64: vgic: Don't acquire its_lock before config_lock
>
> Reiji Watanabe (2):
> KVM: arm64: Acquire mp_state_lock in kvm_arch_vcpu_ioctl_vcpu_init()
> KVM: arm64: Have kvm_psci_vcpu_on() use WRITE_ONCE() to update mp_state
>
> Ryan Roberts (3):
> KVM: selftests: Fixup config fragment for access_tracking_perf_test
> KVM: selftests: arm64: Fix pte encode/decode for PA bits > 48
> KVM: selftests: arm64: Fix ttbr0_el1 encoding for PA bits > 48
>
> Documentation/virt/kvm/api.rst | 71 ++-
> Documentation/virt/kvm/devices/vm.rst | 79 +++
> arch/arm64/include/asm/kvm_host.h | 25 +-
> arch/arm64/include/asm/kvm_mmu.h | 4 +
> arch/arm64/include/asm/sysreg.h | 3 +
> arch/arm64/include/uapi/asm/kvm.h | 36 ++
> arch/arm64/kernel/cpufeature.c | 11 +
> arch/arm64/kvm/arch_timer.c | 550 ++++++++++++++++-----
> arch/arm64/kvm/arm.c | 147 +++++-
> arch/arm64/kvm/guest.c | 31 +-
> arch/arm64/kvm/handle_exit.c | 36 +-
> arch/arm64/kvm/hyp/include/hyp/switch.h | 53 ++
> arch/arm64/kvm/hyp/nvhe/debug-sr.c | 2 -
> arch/arm64/kvm/hyp/nvhe/mem_protect.c | 7 +
> arch/arm64/kvm/hyp/nvhe/switch.c | 18 +
> arch/arm64/kvm/hyp/nvhe/timer-sr.c | 18 +-
> arch/arm64/kvm/hyp/nvhe/tlb.c | 38 +-
> arch/arm64/kvm/hyp/vhe/switch.c | 7 +-
> arch/arm64/kvm/hyp/vhe/sysreg-sr.c | 12 +
> arch/arm64/kvm/hypercalls.c | 189 ++++++-
> arch/arm64/kvm/pmu-emul.c | 25 +-
> arch/arm64/kvm/psci.c | 37 +-
> arch/arm64/kvm/reset.c | 15 +-
> arch/arm64/kvm/sys_regs.c | 10 +
> arch/arm64/kvm/trace_arm.h | 6 +-
> arch/arm64/kvm/vgic/vgic-debug.c | 8 +-
> arch/arm64/kvm/vgic/vgic-init.c | 36 +-
> arch/arm64/kvm/vgic/vgic-its.c | 33 +-
> arch/arm64/kvm/vgic/vgic-kvm-device.c | 85 ++--
> arch/arm64/kvm/vgic/vgic-mmio-v3.c | 4 +-
> arch/arm64/kvm/vgic/vgic-mmio.c | 12 +-
> arch/arm64/kvm/vgic/vgic-v4.c | 11 +-
> arch/arm64/kvm/vgic/vgic.c | 27 +-
> arch/arm64/kvm/vgic/vgic.h | 3 -
> arch/arm64/tools/cpucaps | 1 +
> arch/arm64/tools/sysreg | 4 +
> arch/x86/include/asm/kvm_host.h | 7 +
> arch/x86/include/uapi/asm/kvm.h | 3 +
> arch/x86/kvm/x86.c | 6 +-
> include/clocksource/arm_arch_timer.h | 1 +
> include/kvm/arm_arch_timer.h | 34 +-
> include/kvm/arm_hypercalls.h | 6 +-
> include/kvm/arm_vgic.h | 1 +
> include/uapi/linux/kvm.h | 12 +-
> tools/testing/selftests/kvm/Makefile | 1 +
> tools/testing/selftests/kvm/aarch64/arch_timer.c | 56 ++-
> tools/testing/selftests/kvm/aarch64/get-reg-list.c | 15 +-
> tools/testing/selftests/kvm/aarch64/smccc_filter.c | 268 ++++++++++
> tools/testing/selftests/kvm/config | 1 +
> .../selftests/kvm/include/aarch64/processor.h | 13 +
> .../testing/selftests/kvm/lib/aarch64/processor.c | 91 ++--
> 51 files changed, 1759 insertions(+), 410 deletions(-)
> create mode 100644 tools/testing/selftests/kvm/aarch64/smccc_filter.c
>
