From patchwork Fri Sep 23 19:45:34 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eduardo Habkost X-Patchwork-Id: 9348727 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 465FE607D0 for ; Fri, 23 Sep 2016 19:51:26 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 398A72ADA9 for ; Fri, 23 Sep 2016 19:51:26 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 2E8612ADAC; Fri, 23 Sep 2016 19:51:26 +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 CFE752ADA9 for ; Fri, 23 Sep 2016 19:51:25 +0000 (UTC) Received: from localhost ([::1]:50593 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bnWUw-0004Ox-4k for patchwork-qemu-devel@patchwork.kernel.org; Fri, 23 Sep 2016 15:51:02 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:50087) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bnWQ8-0000it-9U for qemu-devel@nongnu.org; Fri, 23 Sep 2016 15:46:05 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bnWQ4-0003qh-VZ for qemu-devel@nongnu.org; Fri, 23 Sep 2016 15:46:04 -0400 Received: from mx1.redhat.com ([209.132.183.28]:35818) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bnWQ4-0003qU-Ow for qemu-devel@nongnu.org; Fri, 23 Sep 2016 15:46:00 -0400 Received: from int-mx14.intmail.prod.int.phx2.redhat.com (int-mx14.intmail.prod.int.phx2.redhat.com [10.5.11.27]) (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 3AA0C69CA5; Fri, 23 Sep 2016 19:46:00 +0000 (UTC) Received: from localhost (ovpn-116-93.phx2.redhat.com [10.3.116.93]) by int-mx14.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u8NJjwOT020697; Fri, 23 Sep 2016 15:45:59 -0400 From: Eduardo Habkost To: qemu-devel@nongnu.org Date: Fri, 23 Sep 2016 16:45:34 -0300 Message-Id: <1474659936-978-6-git-send-email-ehabkost@redhat.com> In-Reply-To: <1474659936-978-1-git-send-email-ehabkost@redhat.com> References: <1474659936-978-1-git-send-email-ehabkost@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.27 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.28]); Fri, 23 Sep 2016 19:46:00 +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 5/7] target-i386: xsave: Helper function to calculate xsave area size 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: Paolo Bonzini , Igor Mammedov , Richard Henderson Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP Move the xsave area size calculation from cpu_x86_cpuid() inside its own function. While doing it, change it to use the XSAVE area struct sizes for the initial size, instead of the magic 0x240 number. Signed-off-by: Eduardo Habkost Reviewed-by: Richard Henderson --- target-i386/cpu.c | 22 +++++++++++++++------- 1 file changed, 15 insertions(+), 7 deletions(-) diff --git a/target-i386/cpu.c b/target-i386/cpu.c index 7e66003..9034d8e 100644 --- a/target-i386/cpu.c +++ b/target-i386/cpu.c @@ -548,6 +548,20 @@ static const ExtSaveArea x86_ext_save_areas[] = { .size = sizeof(XSavePKRU) }, }; +static uint32_t xsave_area_size(uint64_t mask) +{ + int i; + uint64_t ret = sizeof(X86LegacyXSaveArea) + sizeof(X86XSaveHeader); + + for (i = 2; i < ARRAY_SIZE(x86_ext_save_areas); i++) { + const ExtSaveArea *esa = &x86_ext_save_areas[i]; + if ((mask >> i) & 1) { + ret = MAX(ret, esa->offset + esa->size); + } + } + return ret; +} + const char *get_register_name_32(unsigned int reg) { if (reg >= CPU_NB_REGS32) { @@ -2519,13 +2533,7 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count, } if (count == 0) { - *ecx = 0x240; - for (i = 2; i < ARRAY_SIZE(x86_ext_save_areas); i++) { - const ExtSaveArea *esa = &x86_ext_save_areas[i]; - if ((ena_mask >> i) & 1) { - *ecx = MAX(*ecx, esa->offset + esa->size); - } - } + *ecx = xsave_area_size(ena_mask);; *eax = ena_mask; *edx = ena_mask >> 32; *ebx = *ecx;