On Fri, 19 Mar 2021 16:17:08 +0000, Yoan Picchi <[email protected]> wrote: > > Add a counter that triggers when all the cache are flushed. This happens > when toggling caching for instance.
Which cache? > > Signed-off-by: Yoan Picchi <[email protected]> > --- > arch/arm64/include/asm/kvm_host.h | 1 + > arch/arm64/kvm/guest.c | 1 + > arch/arm64/kvm/mmu.c | 1 + > 3 files changed, 3 insertions(+) > > diff --git a/arch/arm64/include/asm/kvm_host.h > b/arch/arm64/include/asm/kvm_host.h > index 3609aa89d..e6967951f 100644 > --- a/arch/arm64/include/asm/kvm_host.h > +++ b/arch/arm64/include/asm/kvm_host.h > @@ -547,6 +547,7 @@ static inline bool __vcpu_write_sys_reg_to_cpu(u64 val, > int reg) > > struct kvm_vm_stat { > ulong remote_tlb_flush; > + ulong flush_all_cache_lines; > ulong cached_page_invalidated; > }; > > diff --git a/arch/arm64/kvm/guest.c b/arch/arm64/kvm/guest.c > index f6b1f0b63..d948c3bd2 100644 > --- a/arch/arm64/kvm/guest.c > +++ b/arch/arm64/kvm/guest.c > @@ -41,6 +41,7 @@ struct kvm_stats_debugfs_item debugfs_entries[] = { > VCPU_STAT("regular_page_mapped", regular_page_mapped), > VCPU_STAT("huge_page_mapped", huge_page_mapped), > VM_STAT("remote_tlb_flush", remote_tlb_flush), > + VM_STAT("flush_all_cache_lines", flush_all_cache_lines), > VM_STAT("cached_page_invalidated", cached_page_invalidated), > VCPU_STAT("exits", exits), > VCPU_STAT("halt_poll_success_ns", halt_poll_success_ns), > diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c > index d6ddf5ab8..985b048df 100644 > --- a/arch/arm64/kvm/mmu.c > +++ b/arch/arm64/kvm/mmu.c > @@ -181,6 +181,7 @@ static void stage2_flush_vm(struct kvm *kvm) > kvm_for_each_memslot(memslot, slots) > stage2_flush_memslot(kvm, memslot); > > + kvm->stat.flush_all_cache_lines++; What additional information does this give over the other d-side flush counter? M. -- Without deviation from the norm, progress is not possible. _______________________________________________ kvmarm mailing list [email protected] https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
