linux-kernel - [PATCH 0/2] kvm: x86/mmu: Skip adding write-access for spte in FNAME(sync_page) and remove shadow_host_writable

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Date:   Mon, 12 Dec 2022 23:32:03 +0800
From:   Lai Jiangshan <jiangshanlai@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     Paolo Bonzini <pbonzini@...hat.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Lai Jiangshan <jiangshan.ljs@...group.com>
Subject: [PATCH 0/2] kvm: x86/mmu: Skip adding write-access for spte in FNAME(sync_page) and remove shadow_host_writable_mask

From: Lai Jiangshan <jiangshan.ljs@...group.com>

shadow_host_writable_mask is used only in FNAME(sync_page) for adding
write-access for spte which can be added in later page fault.

Skip adding it and save a bit from spte.

Lai Jiangshan (2):
  kvm: x86/mmu: Reduce the update to the spte in FNAME(sync_page)
  kvm: x86/mmu: Remove useless shadow_host_writable_mask

 arch/x86/kvm/mmu/paging_tmpl.h | 26 +++++++++++++++++++++--
 arch/x86/kvm/mmu/spte.c        |  8 +------
 arch/x86/kvm/mmu/spte.h        | 38 +++++++++++-----------------------
 3 files changed, 37 insertions(+), 35 deletions(-)

-- 
2.19.1.6.gb485710b