From patchwork Fri Sep 2 21:46:49 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wei Huang X-Patchwork-Id: 9311709 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 EAADC607D2 for ; Fri, 2 Sep 2016 21:47:33 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E13BF290C5 for ; Fri, 2 Sep 2016 21:47:33 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id D588529863; Fri, 2 Sep 2016 21:47:33 +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 lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 87344290C5 for ; Fri, 2 Sep 2016 21:47:33 +0000 (UTC) Received: from localhost ([::1]:44106 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bfwJA-0007bK-Jm for patchwork-qemu-devel@patchwork.kernel.org; Fri, 02 Sep 2016 17:47:32 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:60589) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bfwIc-0007ZE-Tb for qemu-devel@nongnu.org; Fri, 02 Sep 2016 17:46:59 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bfwIb-0000DI-VQ for qemu-devel@nongnu.org; Fri, 02 Sep 2016 17:46:58 -0400 Received: from mx1.redhat.com ([209.132.183.28]:35652) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bfwIX-0000CQ-BT; Fri, 02 Sep 2016 17:46:53 -0400 Received: from int-mx11.intmail.prod.int.phx2.redhat.com (int-mx11.intmail.prod.int.phx2.redhat.com [10.5.11.24]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id A56B222036; Fri, 2 Sep 2016 21:46:51 +0000 (UTC) Received: from weilaptop.redhat.com (vpn-48-163.rdu2.redhat.com [10.10.48.163]) by int-mx11.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u82LkouS002543; Fri, 2 Sep 2016 17:46:50 -0400 From: Wei Huang To: qemu-devel@nongnu.org Date: Fri, 2 Sep 2016 16:46:49 -0500 Message-Id: <1472852809-23042-1-git-send-email-wei@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.24 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.25]); Fri, 02 Sep 2016 21:46:51 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH 1/1] ARM: ACPI: fix the AML ID format for CPU devices X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, qemu-arm@nongnu.org, eric.auger@redhat.com, zhaoshenglong@huawei.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP Current QEMU will stall guest VM booting under ACPI mode when vcpu count is >= 12. Analyzing the booting log, it turns out that DSDT table can't be loaded correctly due to "Invalid character(s) in name (0x62303043), repaired: [C00*]". This is because existing QEMU uses a lower case AML ID for CPU devices (e.g. C000, C001, ..., C00a, C00b). The ACPI code inside guest VM detects this lower case character as an invalid character (see acpi_ut_valid_acpi_char() in drivers/acpi/acpica/utstring.c file) and converts it to "*". This causes duplicated IDs (i.e. "C00a" ==>"C00*" and "C00b" ==> "C00*"). So ACPI refuses to load the table. This patch fixes the problem by changing the format with a upper case character. It matches the CPU ID formats used in other parts of QEMU code. Reported-by: Eric Auger Signed-off-by: Wei Huang Reviewed-by: Shannon Zhao Reviewed-by: Eric Auger Tested-by: Eric Auger --- hw/arm/virt-acpi-build.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c index 28fc59c..295ec86 100644 --- a/hw/arm/virt-acpi-build.c +++ b/hw/arm/virt-acpi-build.c @@ -53,7 +53,7 @@ static void acpi_dsdt_add_cpus(Aml *scope, int smp_cpus) uint16_t i; for (i = 0; i < smp_cpus; i++) { - Aml *dev = aml_device("C%03x", i); + Aml *dev = aml_device("C%.03X", i); aml_append(dev, aml_name_decl("_HID", aml_string("ACPI0007"))); aml_append(dev, aml_name_decl("_UID", aml_int(i))); aml_append(scope, dev);