Hi, This patch series adds virtual suspend time injection support to KVM. It is an updated version of the following series: v2: https://lore.kernel.org/kvm/20210806100710.2425336-1-hikalium@xxxxxxxxxxxx/ v1: https://lore.kernel.org/kvm/20210426090644.2218834-1-hikalium@xxxxxxxxxxxx/ Please take a look again. To kvm/arm64 folks: I'm going to implement this mechanism to ARM64 as well but not sure which function should be used to make an IRQ (like kvm_apic_set_irq in x86) and if it is okay to use kvm_gfn_to_hva_cache / kvm_write_guest_cached for sharing the suspend duration. Please let me know if there is other suitable way or any suggestions. Thanks, Hikaru Nishida Changes in v3: - Used PM notifier instead of modifying timekeeping_resume() - This avoids holding kvm_lock under interrupt disabled context. - Used KVM_REQ_* to make a request for vcpus. - Reused HYPERVISOR_CALLBACK_VECTOR IRQ instead of adding a new one. - Extracted arch-independent parts. - Fixed other reviewed points. Hikaru Nishida (5): timekeeping: Expose tk->offs_boot via ktime_get_offs_boot_ns kvm/x86: Include asm/pvclock.h in asm/kvmclock.h kvm/x86: virtual suspend time injection: Add common definitions kvm/x86: virtual suspend time injection: Implement host side kvm/x86: virtual suspend time injection: Implement guest side Documentation/virt/kvm/cpuid.rst | 3 + Documentation/virt/kvm/msr.rst | 30 ++++++++ arch/x86/Kconfig | 13 ++++ arch/x86/include/asm/idtentry.h | 2 +- arch/x86/include/asm/kvm_host.h | 2 + arch/x86/include/asm/kvmclock.h | 11 +++ arch/x86/include/uapi/asm/kvm_para.h | 6 ++ arch/x86/kernel/kvm.c | 14 +++- arch/x86/kernel/kvmclock.c | 26 +++++++ arch/x86/kvm/Kconfig | 13 ++++ arch/x86/kvm/cpuid.c | 4 + arch/x86/kvm/x86.c | 109 +++++++++++++++++++++++++++ arch/x86/mm/fault.c | 2 +- include/linux/kvm_host.h | 48 ++++++++++++ include/linux/timekeeper_internal.h | 5 ++ include/linux/timekeeping.h | 6 ++ kernel/time/timekeeping.c | 56 ++++++++++++++ virt/kvm/kvm_main.c | 88 +++++++++++++++++++++ 18 files changed, 432 insertions(+), 6 deletions(-) -- 2.33.0.1079.g6e70778dc9-goog
