From nobody Tue Feb 10 08:06:56 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) client-ip=192.237.175.120; envelope-from=xen-devel-bounces@lists.xenproject.org; helo=lists.xenproject.org; Authentication-Results: mx.zohomail.com; spf=pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org; dmarc=fail(p=none dis=none) header.from=arm.com ARC-Seal: i=1; a=rsa-sha256; t=1608219779; cv=none; d=zohomail.com; s=zohoarc; b=Sf571SaiFMTAD6zyP07MllCyWE3+1o14WC0M62soZITK++Wo8apDI1WoTFLP0Hzil5gmNlXxWbEaV4uQqWt8qfX0QA0+xIodnIDwfeX5rtZPFWGrQonaBphznHgCwDAkzM4r7uCW4wS8ZZBZyjrmYSAWvOuEMAFSvW9PNfsbMTw= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1608219779; h=Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Help:List-Unsubscribe:Message-ID:References:Sender:Subject:To; bh=4d+6aJ4Dz85eKAO9DFadRTP9DojUaXPi9MZWjh3dHgM=; b=Hhk9mwxIjhxSRKxwJUh2zzE+hmq9N2L3vAEhw/4/cSCqXiGTbBnY8zl5G9h+nehVKPTow4FtQxmslyMpQDXXfZtSalsQDfEvmkn1UN/pHY9iP4/uFpVBcoUfwWLMD5Pa6bUyOrk5HSUAo5C3EPTs9AwbhAw3Ft1eamdufX+SNVs= ARC-Authentication-Results: i=1; mx.zohomail.com; spf=pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org; dmarc=fail header.from= (p=none dis=none) header.from= Return-Path: Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) by mx.zohomail.com with SMTPS id 1608219779196166.8122789954499; Thu, 17 Dec 2020 07:42:59 -0800 (PST) Received: from list by lists.xenproject.org with outflank-mailman.55983.97712 (Exim 4.92) (envelope-from ) id 1kpvQS-0004T1-Tf; Thu, 17 Dec 2020 15:42:44 +0000 Received: by outflank-mailman (output) from mailman id 55983.97712; Thu, 17 Dec 2020 15:42:44 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kpvQS-0004Ss-Px; Thu, 17 Dec 2020 15:42:44 +0000 Received: by outflank-mailman (input) for mailman id 55983; Thu, 17 Dec 2020 15:42:42 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kpvQQ-0004G9-SH for xen-devel@lists.xenproject.org; Thu, 17 Dec 2020 15:42:42 +0000 Received: from foss.arm.com (unknown [217.140.110.172]) by us1-rack-iad1.inumbo.com (Halon) with ESMTP id e99d0a0f-ebf0-460c-b3a9-5ba4df1b471f; Thu, 17 Dec 2020 15:42:36 +0000 (UTC) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 08A19101E; Thu, 17 Dec 2020 07:42:36 -0800 (PST) Received: from e109506-lin.cambridge.arm.com (e109506-lin.cambridge.arm.com [10.1.199.1]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 46A263F66B; Thu, 17 Dec 2020 07:42:35 -0800 (PST) X-Outflank-Mailman: Message body and most headers restored to incoming version X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: e99d0a0f-ebf0-460c-b3a9-5ba4df1b471f From: Bertrand Marquis To: xen-devel@lists.xenproject.org Cc: Stefano Stabellini , Julien Grall , Volodymyr Babchuk Subject: [PATCH v4 5/8] xen/arm: Add handler for ID registers on arm64 Date: Thu, 17 Dec 2020 15:38:05 +0000 Message-Id: <46c4c7e8ec64a48ecefd894d436c116bab5d4a86.1608214355.git.bertrand.marquis@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: References: In-Reply-To: References: Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Add vsysreg emulation for registers trapped when TID3 bit is activated in HSR. The emulation is returning the value stored in cpuinfo_guest structure for know registers and is handling reserved registers as RAZ. Signed-off-by: Bertrand Marquis Reviewed-by: Stefano Stabellini --- Changes in V2: Rebase Changes in V3: Fix commit message Fix code style for GENERATE_TID3_INFO declaration Add handling of reserved registers as RAZ. Changes in V4: Fix indentation in GENERATE_TID3_INFO macro Add explicit case code for reserved registers --- xen/arch/arm/arm64/vsysreg.c | 82 ++++++++++++++++++++++++++++++++++++ 1 file changed, 82 insertions(+) diff --git a/xen/arch/arm/arm64/vsysreg.c b/xen/arch/arm/arm64/vsysreg.c index 8a85507d9d..41f18612c6 100644 --- a/xen/arch/arm/arm64/vsysreg.c +++ b/xen/arch/arm/arm64/vsysreg.c @@ -69,6 +69,14 @@ TVM_REG(CONTEXTIDR_EL1) break; \ } =20 +/* Macro to generate easily case for ID co-processor emulation */ +#define GENERATE_TID3_INFO(reg, field, offset) \ + case HSR_SYSREG_##reg: \ + { \ + return handle_ro_read_val(regs, regidx, hsr.sysreg.read, hsr, \ + 1, guest_cpuinfo.field.bits[offset]); \ + } + void do_sysreg(struct cpu_user_regs *regs, const union hsr hsr) { @@ -259,6 +267,80 @@ void do_sysreg(struct cpu_user_regs *regs, */ return handle_raz_wi(regs, regidx, hsr.sysreg.read, hsr, 1); =20 + /* + * HCR_EL2.TID3 + * + * This is trapping most Identification registers used by a guest + * to identify the processor features + */ + GENERATE_TID3_INFO(ID_PFR0_EL1, pfr32, 0) + GENERATE_TID3_INFO(ID_PFR1_EL1, pfr32, 1) + GENERATE_TID3_INFO(ID_PFR2_EL1, pfr32, 2) + GENERATE_TID3_INFO(ID_DFR0_EL1, dbg32, 0) + GENERATE_TID3_INFO(ID_DFR1_EL1, dbg32, 1) + GENERATE_TID3_INFO(ID_AFR0_EL1, aux32, 0) + GENERATE_TID3_INFO(ID_MMFR0_EL1, mm32, 0) + GENERATE_TID3_INFO(ID_MMFR1_EL1, mm32, 1) + GENERATE_TID3_INFO(ID_MMFR2_EL1, mm32, 2) + GENERATE_TID3_INFO(ID_MMFR3_EL1, mm32, 3) + GENERATE_TID3_INFO(ID_MMFR4_EL1, mm32, 4) + GENERATE_TID3_INFO(ID_MMFR5_EL1, mm32, 5) + GENERATE_TID3_INFO(ID_ISAR0_EL1, isa32, 0) + GENERATE_TID3_INFO(ID_ISAR1_EL1, isa32, 1) + GENERATE_TID3_INFO(ID_ISAR2_EL1, isa32, 2) + GENERATE_TID3_INFO(ID_ISAR3_EL1, isa32, 3) + GENERATE_TID3_INFO(ID_ISAR4_EL1, isa32, 4) + GENERATE_TID3_INFO(ID_ISAR5_EL1, isa32, 5) + GENERATE_TID3_INFO(ID_ISAR6_EL1, isa32, 6) + GENERATE_TID3_INFO(MVFR0_EL1, mvfr, 0) + GENERATE_TID3_INFO(MVFR1_EL1, mvfr, 1) + GENERATE_TID3_INFO(MVFR2_EL1, mvfr, 2) + GENERATE_TID3_INFO(ID_AA64PFR0_EL1, pfr64, 0) + GENERATE_TID3_INFO(ID_AA64PFR1_EL1, pfr64, 1) + GENERATE_TID3_INFO(ID_AA64DFR0_EL1, dbg64, 0) + GENERATE_TID3_INFO(ID_AA64DFR1_EL1, dbg64, 1) + GENERATE_TID3_INFO(ID_AA64ISAR0_EL1, isa64, 0) + GENERATE_TID3_INFO(ID_AA64ISAR1_EL1, isa64, 1) + GENERATE_TID3_INFO(ID_AA64MMFR0_EL1, mm64, 0) + GENERATE_TID3_INFO(ID_AA64MMFR1_EL1, mm64, 1) + GENERATE_TID3_INFO(ID_AA64MMFR2_EL1, mm64, 2) + GENERATE_TID3_INFO(ID_AA64AFR0_EL1, aux64, 0) + GENERATE_TID3_INFO(ID_AA64AFR1_EL1, aux64, 1) + GENERATE_TID3_INFO(ID_AA64ZFR0_EL1, zfr64, 0) + + /* + * Those cases are catching all Reserved registers trapped by TID3 whi= ch + * currently have no assignment. + * HCR.TID3 is trapping all registers in the group 3: + * Op0 =3D=3D 3, op1 =3D=3D 0, CRn =3D=3D c0,CRm =3D=3D {c1-c7}, op2 = =3D=3D {0-7}. + * Those registers are defined as being RO in the Arm Architecture + * Reference manual Armv8 (Chapter D12.3.2 of issue F.c) so handle them + * as Read-only read as zero. + */ + case HSR_SYSREG(3,0,c0,c3,3): + case HSR_SYSREG(3,0,c0,c3,7): + case HSR_SYSREG(3,0,c0,c4,2): + case HSR_SYSREG(3,0,c0,c4,3): + case HSR_SYSREG(3,0,c0,c4,5): + case HSR_SYSREG(3,0,c0,c4,6): + case HSR_SYSREG(3,0,c0,c4,7): + case HSR_SYSREG(3,0,c0,c5,2): + case HSR_SYSREG(3,0,c0,c5,3): + case HSR_SYSREG(3,0,c0,c5,6): + case HSR_SYSREG(3,0,c0,c5,7): + case HSR_SYSREG(3,0,c0,c6,2): + case HSR_SYSREG(3,0,c0,c6,3): + case HSR_SYSREG(3,0,c0,c6,4): + case HSR_SYSREG(3,0,c0,c6,5): + case HSR_SYSREG(3,0,c0,c6,6): + case HSR_SYSREG(3,0,c0,c6,7): + case HSR_SYSREG(3,0,c0,c7,3): + case HSR_SYSREG(3,0,c0,c7,4): + case HSR_SYSREG(3,0,c0,c7,5): + case HSR_SYSREG(3,0,c0,c7,6): + case HSR_SYSREG(3,0,c0,c7,7): + return handle_ro_raz(regs, regidx, hsr.sysreg.read, hsr, 1); + /* * HCR_EL2.TIDCP * --=20 2.17.1