All of lore.kernel.org
 help / color / mirror / Atom feed
From: Sean Christopherson <seanjc@google.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: Sean Christopherson <seanjc@google.com>,
	Vitaly Kuznetsov <vkuznets@redhat.com>,
	Wanpeng Li <wanpengli@tencent.com>,
	Jim Mattson <jmattson@google.com>, Joerg Roedel <joro@8bytes.org>,
	kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
	Ben Gardon <bgardon@google.com>,
	Makarand Sonare <makarandsonare@google.com>
Subject: [PATCH 02/14] KVM: x86/mmu: Don't unnecessarily write-protect small pages in TDP MMU
Date: Fri, 12 Feb 2021 16:50:03 -0800	[thread overview]
Message-ID: <20210213005015.1651772-3-seanjc@google.com> (raw)
In-Reply-To: <20210213005015.1651772-1-seanjc@google.com>

Respect start_level when write-protect pages in the TDP MMU for dirty
logging.  When the dirty bitmaps are initialized with all bits set, small
pages don't need to be write-protected as they've already been marked
dirty.

Signed-off-by: Sean Christopherson <seanjc@google.com>
---
 arch/x86/kvm/mmu/mmu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index e507568cd55d..24325bdcd387 100644
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -5500,7 +5500,7 @@ void kvm_mmu_slot_remove_write_access(struct kvm *kvm,
 	flush = slot_handle_level(kvm, memslot, slot_rmap_write_protect,
 				start_level, KVM_MAX_HUGEPAGE_LEVEL, false);
 	if (is_tdp_mmu_enabled(kvm))
-		flush |= kvm_tdp_mmu_wrprot_slot(kvm, memslot, PG_LEVEL_4K);
+		flush |= kvm_tdp_mmu_wrprot_slot(kvm, memslot, start_level);
 	write_unlock(&kvm->mmu_lock);
 
 	/*
-- 
2.30.0.478.g8a0d178c01-goog


  parent reply	other threads:[~2021-02-13  0:52 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-13  0:50 [PATCH 00/14] KVM: x86/mmu: Dirty logging fixes and improvements Sean Christopherson
2021-02-13  0:50 ` [PATCH 01/14] KVM: x86/mmu: Expand collapsible SPTE zap for TDP MMU to ZONE_DEVICE pages Sean Christopherson
2021-02-18 12:36   ` Paolo Bonzini
2021-02-13  0:50 ` Sean Christopherson [this message]
2021-02-13  0:50 ` [PATCH 03/14] KVM: x86/mmu: Split out max mapping level calculation to helper Sean Christopherson
2021-02-13  0:50 ` [PATCH 04/14] KVM: x86/mmu: Pass the memslot to the rmap callbacks Sean Christopherson
2021-02-13  0:50 ` [PATCH 05/14] KVM: x86/mmu: Consult max mapping level when zapping collapsible SPTEs Sean Christopherson
2021-02-18 12:43   ` Paolo Bonzini
2021-02-18 16:23     ` Sean Christopherson
2021-02-18 22:30       ` Mike Kravetz
2021-02-19  1:31         ` Sean Christopherson
2021-02-13  0:50 ` [PATCH 06/14] KVM: nVMX: Disable PML in hardware when running L2 Sean Christopherson
2021-02-13  0:50 ` [PATCH 07/14] KVM: x86/mmu: Expand on the comment in kvm_vcpu_ad_need_write_protect() Sean Christopherson
2021-02-13  0:50 ` [PATCH 08/14] KVM: x86/mmu: Make dirty log size hook (PML) a value, not a function Sean Christopherson
2021-02-18 12:45   ` Paolo Bonzini
2021-02-13  0:50 ` [PATCH 09/14] KVM: x86: Move MMU's PML logic to common code Sean Christopherson
2021-02-13  0:50 ` [PATCH 10/14] KVM: x86: Further clarify the logic and comments for toggling log dirty Sean Christopherson
2021-02-18 12:50   ` Paolo Bonzini
2021-02-18 16:15     ` Sean Christopherson
2021-02-18 16:56       ` Paolo Bonzini
2021-02-13  0:50 ` [PATCH 11/14] KVM: VMX: Dynamically enable/disable PML based on memslot dirty logging Sean Christopherson
2021-02-13  0:50 ` [PATCH 12/14] KVM: x86/mmu: Don't set dirty bits when disabling dirty logging w/ PML Sean Christopherson
2021-02-18 17:08   ` Paolo Bonzini
2021-02-13  0:50 ` [PATCH 13/14] KVM: x86: Fold "write-protect large" use case into generic write-protect Sean Christopherson
2021-02-13  0:50 ` [PATCH 14/14] KVM: x86/mmu: Remove a variety of unnecessary exports Sean Christopherson
2021-02-17 22:50 ` [PATCH 00/14] KVM: x86/mmu: Dirty logging fixes and improvements Sean Christopherson
2021-02-18 12:57 ` Paolo Bonzini

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20210213005015.1651772-3-seanjc@google.com \
    --to=seanjc@google.com \
    --cc=bgardon@google.com \
    --cc=jmattson@google.com \
    --cc=joro@8bytes.org \
    --cc=kvm@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=makarandsonare@google.com \
    --cc=pbonzini@redhat.com \
    --cc=vkuznets@redhat.com \
    --cc=wanpengli@tencent.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.