From nobody Mon Apr 6 17:42:52 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=quarantine dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1772809468; cv=none; d=zohomail.com; s=zohoarc; b=nKBB157w4i5EVUvjlByT+x/hQpjJ2KfEsqRSWDrA7ZLGIjMbATEXvEDiWRRanm3U30n8CwB9Qc6Cqto+uyjY3hxzeQUHl0tcF/72Wb1jfK0NDG586HGxRx7Bhjh38kU8z9bWjQCrs+nBxsnVuBtyYQlRdHbr9wnEefLezHghqMs= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1772809468; h=Content-Transfer-Encoding:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To:Cc; bh=wECUQICQlfSyJaoevuqfyZMWVbAQ40qS5Z0WmE0SoJw=; b=QY0kvXl+DnYx/6QdVORnrX1jUv0sy0v3pFHulUfDLLCs1v8V6jZLLJ7j9w1AELCYb5de4gTOqWTXIJekqJ0H1dpYecYG78Q7VMM97DZN18JC2S8LPh53mBNzCwd62Dq6lQKL/XazchnribylDRXpd95qG4bf4hlvgI7gDDbhQJQ= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=quarantine dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1772809468754222.51032398985888; Fri, 6 Mar 2026 07:04:28 -0800 (PST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1vyWiV-0006xB-Q5; Fri, 06 Mar 2026 10:03:51 -0500 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 1vyWiO-0006OO-OM for qemu-devel@nongnu.org; Fri, 06 Mar 2026 10:03:46 -0500 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1vyWiK-0003GU-FT for qemu-devel@nongnu.org; Fri, 06 Mar 2026 10:03:44 -0500 Received: from mx-prod-mc-03.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-455-2yXIGyvuOM2EG4vEfwBQIA-1; Fri, 06 Mar 2026 10:03:24 -0500 Received: from mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.4]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 7F69D1955D9C; Fri, 6 Mar 2026 15:03:23 +0000 (UTC) Received: from laptop.redhat.com (unknown [10.44.32.126]) by mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 7341E3003EA4; Fri, 6 Mar 2026 15:03:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1772809409; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=wECUQICQlfSyJaoevuqfyZMWVbAQ40qS5Z0WmE0SoJw=; b=cbK3NUMtW5S9h+pFQB/3kP9icI/sw8M4ZmE++fLkoMzk0+zItRnTaDPY+zDvl/Z5CH37lt 1lyIJAyo0oRm4P92uNWoFuVt0ckPPJewHWvkLn397glgFby0UX36aQXD9c7ElH8pbk1Jkq /wggQD148hJt6SVeP2956pR5DcjW1+o= X-MC-Unique: 2yXIGyvuOM2EG4vEfwBQIA-1 X-Mimecast-MFC-AGG-ID: 2yXIGyvuOM2EG4vEfwBQIA_1772809403 From: Eric Auger To: eric.auger.pro@gmail.com, eric.auger@redhat.com, qemu-devel@nongnu.org, qemu-arm@nongnu.org, peter.maydell@linaro.org, cohuck@redhat.com, sebott@redhat.com, peterx@redhat.com, philmd@linaro.org, alex.bennee@linaro.org Subject: [PATCH v9 4/6] target/arm/cpu64: Define cpreg migration tolerance for KVM_REG_ARM_VENDOR_HYP_BMAP_2 Date: Fri, 6 Mar 2026 16:02:22 +0100 Message-ID: <20260306150302.203112-5-eric.auger@redhat.com> In-Reply-To: <20260306150302.203112-1-eric.auger@redhat.com> References: <20260306150302.203112-1-eric.auger@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.129.124; envelope-from=eric.auger@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -9 X-Spam_score: -1.0 X-Spam_bar: - X-Spam_report: (-1.0 / 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, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.411, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.679, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1772809470544158500 Content-Type: text/plain; charset="utf-8" KVM_REG_ARM_VENDOR_HYP_BMAP_2 pseudo FW register is exposed from v6.15 onwards. Backward migration from a >=3D v6.15 to an older kernel would fail without cpreg migration tolerance definition for this register. Signed-off-by: Eric Auger Reviewed-by: Sebastian Ott --- target/arm/cpu64.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/target/arm/cpu64.c b/target/arm/cpu64.c index 4cfddc6e8c0..abc6b78ef7d 100644 --- a/target/arm/cpu64.c +++ b/target/arm/cpu64.c @@ -833,6 +833,14 @@ static void kvm_arm_set_cpreg_mig_tolerances(ARMCPU *c= pu) 0, 0, ToleranceNotOnBothEnds); arm_register_cpreg_mig_tolerance(cpu, ARM64_SYS_REG(3, 0, 10, 2, 3), 0, 0, ToleranceNotOnBothEnds); + + /* + * KVM_REG_ARM_VENDOR_HYP_BMAP_2 pseudo FW register is exposed + * from v6.15 onwards. Backward migration from a >=3D v6.15 to an older + * kernel would fail without cpreg migration tolerance definition + */ + arm_register_cpreg_mig_tolerance(cpu, KVM_REG_ARM_FW_FEAT_BMAP_REG(3), + 0, 0, ToleranceNotOnBothEnds); } =20 static void aarch64_host_initfn(Object *obj) --=20 2.53.0