From patchwork Mon May 6 03:10:31 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tiejun Chen X-Patchwork-Id: 2521891 Return-Path: X-Original-To: patchwork-kvm@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork1.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork1.kernel.org (Postfix) with ESMTP id 198393FD4E for ; Mon, 6 May 2013 03:10:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752333Ab3EFDKl (ORCPT ); Sun, 5 May 2013 23:10:41 -0400 Received: from mail1.windriver.com ([147.11.146.13]:33457 "EHLO mail1.windriver.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751999Ab3EFDKk (ORCPT ); Sun, 5 May 2013 23:10:40 -0400 Received: from ALA-HCA.corp.ad.wrs.com (ala-hca.corp.ad.wrs.com [147.11.189.40]) by mail1.windriver.com (8.14.5/8.14.3) with ESMTP id r463AYMj008486 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL); Sun, 5 May 2013 20:10:34 -0700 (PDT) Received: from Linux.corp.ad.wrs.com (128.224.162.168) by ALA-HCA.corp.ad.wrs.com (147.11.189.50) with Microsoft SMTP Server id 14.2.342.3; Sun, 5 May 2013 20:10:33 -0700 From: Tiejun Chen To: CC: , , Subject: [RFC][KVM][PATCH 1/1] kvm:ppc:booke-64: soft-disable interrupts Date: Mon, 6 May 2013 11:10:31 +0800 Message-ID: <1367809831-28838-1-git-send-email-tiejun.chen@windriver.com> X-Mailer: git-send-email 1.7.9.5 MIME-Version: 1.0 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org For the external interrupt, the decrementer exception and the doorbell excpetion, we also need to soft-disable interrupts while doing as host interrupt handlers since the DO_KVM hook is always performed to skip EXCEPTION_COMMON then miss this original chance with the 'ints' (INTS_DISABLE). Signed-off-by: Tiejun Chen --- arch/powerpc/kvm/bookehv_interrupts.S | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/arch/powerpc/kvm/bookehv_interrupts.S b/arch/powerpc/kvm/bookehv_interrupts.S index e8ed7d6..2fd62bf 100644 --- a/arch/powerpc/kvm/bookehv_interrupts.S +++ b/arch/powerpc/kvm/bookehv_interrupts.S @@ -33,6 +33,8 @@ #ifdef CONFIG_64BIT #include +#include +#include #else #include "../kernel/head_booke.h" /* for THREAD_NORMSAVE() */ #endif @@ -469,6 +471,13 @@ _GLOBAL(kvmppc_resume_host) PPC_LL r3, HOST_RUN(r1) mr r5, r14 /* intno */ mr r14, r4 /* Save vcpu pointer. */ +#ifdef CONFIG_64BIT + /* Should we soft-disable interrupts? */ + andi. r6, r5, BOOKE_INTERRUPT_EXTERNAL | BOOKE_INTERRUPT_DECREMENTER | BOOKE_INTERRUPT_DOORBELL + beq skip_soft_dis + SOFT_DISABLE_INTS(r7,r8) +skip_soft_dis: +#endif bl kvmppc_handle_exit /* Restore vcpu pointer and the nonvolatiles we used. */