From: Paolo Bonzini <pbonzini@redhat.com>
To: Ben Gardon <bgardon@google.com>,
linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Cc: Peter Xu <peterx@redhat.com>,
Sean Christopherson <seanjc@google.com>,
Peter Shier <pshier@google.com>,
David Matlack <dmatlack@google.com>,
Mingwei Zhang <mizhang@google.com>,
Yulei Zhang <yulei.kernel@gmail.com>,
Wanpeng Li <kernellwp@gmail.com>,
Xiao Guangrong <xiaoguangrong.eric@gmail.com>,
Kai Huang <kai.huang@intel.com>,
Keqian Zhu <zhukeqian1@huawei.com>,
David Hildenbrand <david@redhat.com>
Subject: Re: [PATCH 05/15] KVM: x86/mmu: Remove need for a vcpu from kvm_slot_page_track_is_active
Date: Thu, 18 Nov 2021 09:25:51 +0100 [thread overview]
Message-ID: <d85d87d3-8ace-ec64-c6dd-0784063e9fb0@redhat.com> (raw)
In-Reply-To: <20211115234603.2908381-6-bgardon@google.com>
On 11/16/21 00:45, Ben Gardon wrote:
> kvm_slot_page_track_is_active only uses its vCPU argument to get a
> pointer to the assoicated struct kvm, so just pass in the struct KVM to
> remove the need for a vCPU pointer.
>
> No functional change intended.
>
>
> Signed-off-by: Ben Gardon <bgardon@google.com>
> ---
> arch/x86/include/asm/kvm_page_track.h | 2 +-
> arch/x86/kvm/mmu/mmu.c | 4 ++--
> arch/x86/kvm/mmu/page_track.c | 4 ++--
> 3 files changed, 5 insertions(+), 5 deletions(-)
>
> diff --git a/arch/x86/include/asm/kvm_page_track.h b/arch/x86/include/asm/kvm_page_track.h
> index 9d4a3b1b25b9..e99a30a4d38b 100644
> --- a/arch/x86/include/asm/kvm_page_track.h
> +++ b/arch/x86/include/asm/kvm_page_track.h
> @@ -63,7 +63,7 @@ void kvm_slot_page_track_add_page(struct kvm *kvm,
> void kvm_slot_page_track_remove_page(struct kvm *kvm,
> struct kvm_memory_slot *slot, gfn_t gfn,
> enum kvm_page_track_mode mode);
> -bool kvm_slot_page_track_is_active(struct kvm_vcpu *vcpu,
> +bool kvm_slot_page_track_is_active(struct kvm *kvm,
> struct kvm_memory_slot *slot, gfn_t gfn,
> enum kvm_page_track_mode mode);
>
> diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
> index 2ada6dee920a..7d0da79668c0 100644
> --- a/arch/x86/kvm/mmu/mmu.c
> +++ b/arch/x86/kvm/mmu/mmu.c
> @@ -2587,7 +2587,7 @@ int mmu_try_to_unsync_pages(struct kvm_vcpu *vcpu, struct kvm_memory_slot *slot,
> * track machinery is used to write-protect upper-level shadow pages,
> * i.e. this guards the role.level == 4K assertion below!
> */
> - if (kvm_slot_page_track_is_active(vcpu, slot, gfn, KVM_PAGE_TRACK_WRITE))
> + if (kvm_slot_page_track_is_active(vcpu->kvm, slot, gfn, KVM_PAGE_TRACK_WRITE))
> return -EPERM;
>
> /*
> @@ -3884,7 +3884,7 @@ static bool page_fault_handle_page_track(struct kvm_vcpu *vcpu,
> * guest is writing the page which is write tracked which can
> * not be fixed by page fault handler.
> */
> - if (kvm_slot_page_track_is_active(vcpu, fault->slot, fault->gfn, KVM_PAGE_TRACK_WRITE))
> + if (kvm_slot_page_track_is_active(vcpu->kvm, fault->slot, fault->gfn, KVM_PAGE_TRACK_WRITE))
> return true;
>
> return false;
> diff --git a/arch/x86/kvm/mmu/page_track.c b/arch/x86/kvm/mmu/page_track.c
> index cc4eb5b7fb76..35c221d5f6ce 100644
> --- a/arch/x86/kvm/mmu/page_track.c
> +++ b/arch/x86/kvm/mmu/page_track.c
> @@ -173,7 +173,7 @@ EXPORT_SYMBOL_GPL(kvm_slot_page_track_remove_page);
> /*
> * check if the corresponding access on the specified guest page is tracked.
> */
> -bool kvm_slot_page_track_is_active(struct kvm_vcpu *vcpu,
> +bool kvm_slot_page_track_is_active(struct kvm *kvm,
> struct kvm_memory_slot *slot, gfn_t gfn,
> enum kvm_page_track_mode mode)
> {
> @@ -186,7 +186,7 @@ bool kvm_slot_page_track_is_active(struct kvm_vcpu *vcpu,
> return false;
>
> if (mode == KVM_PAGE_TRACK_WRITE &&
> - !kvm_page_track_write_tracking_enabled(vcpu->kvm))
> + !kvm_page_track_write_tracking_enabled(kvm))
> return false;
>
> index = gfn_to_index(gfn, slot->base_gfn, PG_LEVEL_4K);
>
Queued, thanks.
Paolo
next prev parent reply other threads:[~2021-11-18 8:26 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-15 23:45 [PATCH 00/15] Currently disabling dirty logging with the TDP MMU is extremely slow. On a 96 vCPU / 96G VM it takes ~45 seconds to disable dirty logging with the TDP MMU, as opposed to ~3.5 seconds with the legacy MMU. This series optimizes TLB flushes and introduces in-place large page promotion, to bring the disable dirty log time down to ~2 seconds Ben Gardon
2021-11-15 23:45 ` [PATCH 01/15] KVM: x86/mmu: Remove redundant flushes when disabling dirty logging Ben Gardon
2021-11-18 8:26 ` Paolo Bonzini
2021-11-15 23:45 ` [PATCH 02/15] KVM: x86/mmu: Introduce vcpu_make_spte Ben Gardon
2021-11-15 23:45 ` [PATCH 03/15] KVM: x86/mmu: Factor wrprot for nested PML out of make_spte Ben Gardon
2021-11-15 23:45 ` [PATCH 04/15] KVM: x86/mmu: Factor mt_mask " Ben Gardon
2021-11-15 23:45 ` [PATCH 05/15] KVM: x86/mmu: Remove need for a vcpu from kvm_slot_page_track_is_active Ben Gardon
2021-11-18 8:25 ` Paolo Bonzini [this message]
2021-11-15 23:45 ` [PATCH 06/15] KVM: x86/mmu: Remove need for a vcpu from mmu_try_to_unsync_pages Ben Gardon
2021-11-18 8:25 ` Paolo Bonzini
2021-11-15 23:45 ` [PATCH 07/15] KVM: x86/mmu: Factor shadow_zero_check out of make_spte Ben Gardon
2021-11-15 23:45 ` [PATCH 08/15] KVM: x86/mmu: Replace vcpu argument with kvm pointer in make_spte Ben Gardon
2021-11-15 23:45 ` [PATCH 09/15] KVM: x86/mmu: Factor out the meat of reset_tdp_shadow_zero_bits_mask Ben Gardon
2021-11-15 23:45 ` [PATCH 10/15] KVM: x86/mmu: Propagate memslot const qualifier Ben Gardon
2021-11-18 8:27 ` Paolo Bonzini
2021-11-15 23:45 ` [PATCH 11/15] KVM: x86/MMU: Refactor vmx_get_mt_mask Ben Gardon
2021-11-18 8:30 ` Paolo Bonzini
2021-11-18 15:30 ` Sean Christopherson
2021-11-19 9:02 ` Paolo Bonzini
2021-11-22 18:11 ` Ben Gardon
2021-11-22 18:46 ` Sean Christopherson
2021-11-15 23:46 ` [PATCH 12/15] KVM: x86/mmu: Factor out part of vmx_get_mt_mask which does not depend on vcpu Ben Gardon
2021-11-15 23:46 ` [PATCH 13/15] KVM: x86/mmu: Add try_get_mt_mask to x86_ops Ben Gardon
2021-11-15 23:46 ` [PATCH 14/15] KVM: x86/mmu: Make kvm_is_mmio_pfn usable outside of spte.c Ben Gardon
2021-11-15 23:46 ` [PATCH 15/15] KVM: x86/mmu: Promote pages in-place when disabling dirty logging Ben Gardon
2021-11-25 4:18 ` Peter Xu
2021-11-29 18:31 ` Ben Gardon
2021-11-30 0:13 ` Sean Christopherson
2021-11-30 7:28 ` Peter Xu
2021-11-30 16:01 ` Sean Christopherson
2021-12-01 1:59 ` Peter Xu
2021-11-15 23:58 ` [PATCH 00/15] Currently disabling dirty logging with the TDP MMU is extremely slow. On a 96 vCPU / 96G VM it takes ~45 seconds to disable dirty logging with the TDP MMU, as opposed to ~3.5 seconds with the legacy MMU. This series optimizes TLB flushes and introduces in-place large page promotion, to bring the disable dirty log time down to ~2 seconds Ben Gardon
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