linux-kernel - [PATCH 0/4] KVM: X86: Improve permission

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Date:   Tue,  7 Dec 2021 17:50:35 +0800
From:   Lai Jiangshan <jiangshanlai@...il.com>
To:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        Paolo Bonzini <pbonzini@...hat.com>
Cc:     Lai Jiangshan <laijs@...ux.alibaba.com>
Subject: [PATCH 0/4] KVM: X86: Improve permission_fault() for SMAP

From: Lai Jiangshan <laijs@...ux.alibaba.com>

permission_fault() calls two callbacks to get CPL and RFLAGS for SMAP,
but it is unneeded for some cases, this patchset improves it.

Lai Jiangshan (4):
  KVM: X86: Fix comments in update_permission_bitmask
  KVM: X86: Rename variable smap to not_smap in permission_fault()
  KVM: X86: Handle implicit supervisor access with SMAP
  KVM: X86: Only get rflags when needed in permission_fault()

 arch/x86/include/asm/kvm_host.h |  9 +++++++
 arch/x86/kvm/mmu.h              | 45 +++++++++++++++++++++------------
 arch/x86/kvm/mmu/mmu.c          |  8 +++---
 arch/x86/kvm/x86.c              | 20 ++++++++++++---
 4 files changed, 59 insertions(+), 23 deletions(-)

-- 
2.19.1.6.gb485710b