From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paolo Bonzini Subject: Re: [PATCH] KVM: mmu: allow page tables to be in read-only slots Date: Mon, 14 Oct 2013 17:28:54 +0200 Message-ID: <525C0DB6.2060009@redhat.com> References: <1377866497-3866-1-git-send-email-pbonzini@redhat.com> <20130901091744.GF22899@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org, glin@suse.de, agraf@suse.de, brogers@suse.de, afaerber@suse.de, lnussel@suse.de, edk2-devel@lists.sf.net, stable@vger.kernel.org, Xiao Guangrong To: Gleb Natapov Return-path: In-Reply-To: <20130901091744.GF22899@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: kvm.vger.kernel.org Il 01/09/2013 11:17, Gleb Natapov ha scritto: > This makes me think are there other places where gfn_to_hva() was > used, but gfn_to_hva_prot() should have been? > - kvm_host_page_size() looks incorrect. We never use huge page to map > read only memory slots currently. > - kvm_handle_bad_page() also looks incorrect and may cause incorrect > address to be reported to userspace. > - kvm_setup_async_pf() also incorrect. Makes all page fault on read > only slot to be sync. > - kvm_vm_fault() one looks OK since function assumes write only slots, > but it is obsolete and should be deleted anyway. > > Others in generic and x86 code looks OK, somebody need to check ppc and > arm code. PPC is a mess, for s390 I couldn't find a spec. ARM needs to be fixed. Patches coming... Paolo