linux-kernel - [RFC PATCH 0/2] KVM: MMU: return page fault error code from permission

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <1457437538-65867-1-git-send-email-pbonzini@redhat.com>
Date:	Tue,  8 Mar 2016 12:45:36 +0100
From:	Paolo Bonzini <pbonzini@...hat.com>
To:	linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Cc:	guangrong.xiao@...ux.intel.com, huaitong.han@...el.com
Subject: [RFC PATCH 0/2] KVM: MMU: return page fault error code from permission_fault

Intel's new PKU extension introduces a bit of the page fault error code
that must be dynamically computed after the PTE lookup (unlike I/D, U/S
and W/R).  To ease this, these two patches make permission_fault return
the page fault error code.

Right now it only adds the P bit to the input parameter "pfec", but PKU
can change that.

Paolo

Paolo Bonzini (2):
  KVM: MMU: precompute page fault error code
  KVM: MMU: return page fault error code from permission_fault

 arch/x86/kvm/mmu.c         |  2 +-
 arch/x86/kvm/mmu.h         | 15 ++++++++++-----
 arch/x86/kvm/paging_tmpl.h | 31 +++++++++++++++++--------------
 3 files changed, 28 insertions(+), 20 deletions(-)

-- 
1.8.3.1