From patchwork Wed Jun 14 22:40:30 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexander Graf X-Patchwork-Id: 13280514 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 2D2ABEB64D8 for ; Wed, 14 Jun 2023 22:42:07 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1q9ZAy-0001J0-F4; Wed, 14 Jun 2023 18:41:16 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1q9ZAw-0001IF-2I; Wed, 14 Jun 2023 18:41:14 -0400 Received: from smtp-fw-9105.amazon.com ([207.171.188.204]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1q9ZAt-000584-G3; Wed, 14 Jun 2023 18:41:13 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.com; i=@amazon.com; q=dns/txt; s=amazon201209; t=1686782471; x=1718318471; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=zKkF0UqGso6xrNyDondoNFmpobwsBP9EsTGid/0zLew=; b=rfdxbbqKqkyyI49Ku9nsXtzKmFaxA+W/OCN2zo64x+N+YbuqNntNe0PV AUU2iT1dk7wp+L5XDhgWC+urFFXIGcYDiRIAWAnU/bGIGu9kxKSjreMhr B1YS3JevhlQtrzZbqh8N8fKpTSbzSK2l9eiYUD35PHcjYtMs2/YO/7Ji3 o=; X-IronPort-AV: E=Sophos;i="6.00,243,1681171200"; d="scan'208";a="654948827" Received: from pdx4-co-svc-p1-lb2-vlan3.amazon.com (HELO email-inbound-relay-pdx-2b-m6i4x-f253a3a3.us-west-2.amazon.com) ([10.25.36.214]) by smtp-border-fw-9105.sea19.amazon.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Jun 2023 22:40:58 +0000 Received: from EX19MTAUWC001.ant.amazon.com (pdx1-ws-svc-p6-lb9-vlan3.pdx.amazon.com [10.236.137.198]) by email-inbound-relay-pdx-2b-m6i4x-f253a3a3.us-west-2.amazon.com (Postfix) with ESMTPS id 0FA7D81150; Wed, 14 Jun 2023 22:40:55 +0000 (UTC) Received: from EX19D020UWC004.ant.amazon.com (10.13.138.149) by EX19MTAUWC001.ant.amazon.com (10.250.64.174) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.26; Wed, 14 Jun 2023 22:40:50 +0000 Received: from dev-dsk-graf-1a-5ce218e4.eu-west-1.amazon.com (10.253.83.51) by EX19D020UWC004.ant.amazon.com (10.13.138.149) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.26; Wed, 14 Jun 2023 22:40:48 +0000 From: Alexander Graf To: CC: , , Cameron Esfahani , Roman Bolshakov , Stefan Hajnoczi , "Michael S. Tsirkin" , Kevin Wolf , Hanna Reitz , Marcel Apfelbaum , Paolo Bonzini , "Peter Maydell" Subject: [PATCH 04/12] hvf: arm: Ignore writes to CNTP_CTL_EL0 Date: Wed, 14 Jun 2023 22:40:30 +0000 Message-ID: <20230614224038.86148-5-graf@amazon.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230614224038.86148-1-graf@amazon.com> References: <20230614224038.86148-1-graf@amazon.com> MIME-Version: 1.0 X-Originating-IP: [10.253.83.51] X-ClientProxiedBy: EX19D035UWA004.ant.amazon.com (10.13.139.109) To EX19D020UWC004.ant.amazon.com (10.13.138.149) Precedence: Bulk Received-SPF: pass client-ip=207.171.188.204; envelope-from=prvs=52269c73c=graf@amazon.de; helo=smtp-fw-9105.amazon.com X-Spam_score_int: -17 X-Spam_score: -1.8 X-Spam_bar: - X-Spam_report: (-1.8 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HEADER_FROM_DIFFERENT_DOMAINS=0.249, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org MacOS unconditionally disables interrupts of the physical timer on boot and then continues to use the virtual one. We don't really want to support a full physical timer emulation, so let's just ignore those writes. Signed-off-by: Alexander Graf --- target/arm/hvf/hvf.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/target/arm/hvf/hvf.c b/target/arm/hvf/hvf.c index 8f72624586..0dff63fb5f 100644 --- a/target/arm/hvf/hvf.c +++ b/target/arm/hvf/hvf.c @@ -179,6 +179,7 @@ void hvf_arm_init_debug(void) #define SYSREG_OSLSR_EL1 SYSREG(2, 0, 1, 1, 4) #define SYSREG_OSDLR_EL1 SYSREG(2, 0, 1, 3, 4) #define SYSREG_CNTPCT_EL0 SYSREG(3, 3, 14, 0, 1) +#define SYSREG_CNTP_CTL_EL0 SYSREG(3, 3, 14, 2, 1) #define SYSREG_PMCR_EL0 SYSREG(3, 3, 9, 12, 0) #define SYSREG_PMUSERENR_EL0 SYSREG(3, 3, 9, 14, 0) #define SYSREG_PMCNTENSET_EL0 SYSREG(3, 3, 9, 12, 1) @@ -1551,6 +1552,12 @@ static int hvf_sysreg_write(CPUState *cpu, uint32_t reg, uint64_t val) case SYSREG_OSLAR_EL1: env->cp15.oslsr_el1 = val & 1; break; + case SYSREG_CNTP_CTL_EL0: + /* + * Guests should not rely on the physical counter, but macOS emits + * disable writes to it. Let it do so, but ignore the requests. + */ + break; case SYSREG_OSDLR_EL1: /* Dummy register */ break;