From patchwork Thu Aug 18 09:47:01 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 9287161 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id ABF2F600CB for ; Thu, 18 Aug 2016 09:47:06 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9C71F290A8 for ; Thu, 18 Aug 2016 09:47:06 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 9165B290AA; Thu, 18 Aug 2016 09:47:06 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0A47A290A8 for ; Thu, 18 Aug 2016 09:47:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1945890AbcHRJrD (ORCPT ); Thu, 18 Aug 2016 05:47:03 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:58003 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753907AbcHRJrC (ORCPT ); Thu, 18 Aug 2016 05:47:02 -0400 Received: from localhost (pes75-3-78-192-101-3.fbxo.proxad.net [78.192.101.3]) by mail.linuxfoundation.org (Postfix) with ESMTPSA id 12574901; Thu, 18 Aug 2016 09:47:00 +0000 (UTC) Subject: Patch "[PATCH BACKPORT 3.10-3.15 4/4] MIPS: KVM: Propagate kseg0/mapped tlb fault errors" has been added to the 3.14-stable tree To: james.hogan@imgtec.com, gregkh@linuxfoundation.org, kvm@vger.kernel.org, linux-mips@linux-mips.org, pbonzini@redhat.com, ralf@linux-mips.org, rkrcmar@redhat.com, stable@vger.kernel.org Cc: , From: Date: Thu, 18 Aug 2016 11:47:01 +0200 In-Reply-To: Message-ID: <147151362112175@kroah.com> MIME-Version: 1.0 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This is a note to let you know that I've just added the patch titled [PATCH BACKPORT 3.10-3.15 4/4] MIPS: KVM: Propagate kseg0/mapped tlb fault errors to the 3.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: mips-kvm-propagate-kseg0-mapped-tlb-fault-errors.patch and it can be found in the queue-3.14 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. From james.hogan@imgtec.com Thu Aug 18 11:46:32 2016 From: James Hogan Date: Thu, 18 Aug 2016 10:22:55 +0100 Subject: [PATCH BACKPORT 3.10-3.15 4/4] MIPS: KVM: Propagate kseg0/mapped tlb fault errors To: Cc: James Hogan , Paolo Bonzini , Radim Krčmář , Ralf Baechle , , Message-ID: From: James Hogan commit 9b731bcfdec4c159ad2e4312e25d69221709b96a upstream. Propagate errors from kvm_mips_handle_kseg0_tlb_fault() and kvm_mips_handle_mapped_seg_tlb_fault(), usually triggering an internal error since they normally indicate the guest accessed bad physical memory or the commpage in an unexpected way. Fixes: 858dd5d45733 ("KVM/MIPS32: MMU/TLB operations for the Guest.") Fixes: e685c689f3a8 ("KVM/MIPS32: Privileged instruction/target branch emulation.") Signed-off-by: James Hogan Cc: Paolo Bonzini Cc: "Radim Krčmář" Cc: Ralf Baechle Cc: linux-mips@linux-mips.org Cc: kvm@vger.kernel.org Signed-off-by: Radim Krčmář [james.hogan@imgtec.com: Backport to v3.10.y - v3.15.y] Signed-off-by: James Hogan Signed-off-by: Greg Kroah-Hartman --- arch/mips/kvm/kvm_mips_emul.c | 33 ++++++++++++++++++++++++--------- arch/mips/kvm/kvm_tlb.c | 14 ++++++++++---- 2 files changed, 34 insertions(+), 13 deletions(-) Patches currently in stable-queue which might be from james.hogan@imgtec.com are queue-3.14/mips-kvm-add-missing-gfn-range-check.patch queue-3.14/mips-kvm-propagate-kseg0-mapped-tlb-fault-errors.patch queue-3.14/mips-kvm-fix-mapped-fault-broken-commpage-handling.patch queue-3.14/mips-kvm-fix-gfn-range-check-in-kseg0-tlb-faults.patch -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html --- a/arch/mips/kvm/kvm_mips_emul.c +++ b/arch/mips/kvm/kvm_mips_emul.c @@ -972,8 +972,13 @@ kvm_mips_emulate_cache(uint32_t inst, ui preempt_disable(); if (KVM_GUEST_KSEGX(va) == KVM_GUEST_KSEG0) { - if (kvm_mips_host_tlb_lookup(vcpu, va) < 0) { - kvm_mips_handle_kseg0_tlb_fault(va, vcpu); + if (kvm_mips_host_tlb_lookup(vcpu, va) < 0 && + kvm_mips_handle_kseg0_tlb_fault(va, vcpu)) { + kvm_err("%s: handling mapped kseg0 tlb fault for %lx, vcpu: %p, ASID: %#lx\n", + __func__, va, vcpu, read_c0_entryhi()); + er = EMULATE_FAIL; + preempt_enable(); + goto done; } } else if ((KVM_GUEST_KSEGX(va) < KVM_GUEST_KSEG0) || KVM_GUEST_KSEGX(va) == KVM_GUEST_KSEG23) { @@ -1006,11 +1011,16 @@ kvm_mips_emulate_cache(uint32_t inst, ui run, vcpu); preempt_enable(); goto dont_update_pc; - } else { - /* We fault an entry from the guest tlb to the shadow host TLB */ - kvm_mips_handle_mapped_seg_tlb_fault(vcpu, tlb, - NULL, - NULL); + } + /* We fault an entry from the guest tlb to the shadow host TLB */ + if (kvm_mips_handle_mapped_seg_tlb_fault(vcpu, tlb, + NULL, NULL)) { + kvm_err("%s: handling mapped seg tlb fault for %lx, index: %u, vcpu: %p, ASID: %#lx\n", + __func__, va, index, vcpu, + read_c0_entryhi()); + er = EMULATE_FAIL; + preempt_enable(); + goto done; } } } else { @@ -1821,8 +1831,13 @@ kvm_mips_handle_tlbmiss(unsigned long ca tlb->tlb_hi, tlb->tlb_lo0, tlb->tlb_lo1); #endif /* OK we have a Guest TLB entry, now inject it into the shadow host TLB */ - kvm_mips_handle_mapped_seg_tlb_fault(vcpu, tlb, NULL, - NULL); + if (kvm_mips_handle_mapped_seg_tlb_fault(vcpu, tlb, + NULL, NULL)) { + kvm_err("%s: handling mapped seg tlb fault for %lx, index: %u, vcpu: %p, ASID: %#lx\n", + __func__, va, index, vcpu, + read_c0_entryhi()); + er = EMULATE_FAIL; + } } } --- a/arch/mips/kvm/kvm_tlb.c +++ b/arch/mips/kvm/kvm_tlb.c @@ -797,10 +797,16 @@ uint32_t kvm_get_inst(uint32_t *opc, str local_irq_restore(flags); return KVM_INVALID_INST; } - kvm_mips_handle_mapped_seg_tlb_fault(vcpu, - &vcpu->arch. - guest_tlb[index], - NULL, NULL); + if (kvm_mips_handle_mapped_seg_tlb_fault(vcpu, + &vcpu->arch.guest_tlb[index], + NULL, NULL)) { + kvm_err("%s: handling mapped seg tlb fault failed for %p, index: %u, vcpu: %p, ASID: %#lx\n", + __func__, opc, index, vcpu, + read_c0_entryhi()); + kvm_mips_dump_guest_tlbs(vcpu); + local_irq_restore(flags); + return KVM_INVALID_INST; + } inst = *(opc); } local_irq_restore(flags);