From nobody Tue Feb 10 03:44:33 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.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; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1569325571; cv=none; d=zoho.com; s=zohoarc; b=eOgQpoOGvaMQ9FrWZ8MVkhLcoF+zYAgLjjBG6AwCW2O6P+20+MQSDeqwEkgm4bTV806WrDsSaP68qnMegnqqRuYVEK+cMoerC4DHifYgEQlnsyxRHlMy7dmBdAKOFyu59bFnvejkHUjr7VJu/bAnMbAsPCfRWGya5cmB24c2pGk= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com; s=zohoarc; t=1569325571; h=Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To:ARC-Authentication-Results; bh=zitO1AePPcSCGQdNRNW+hsfFYqjsVhvyCKbO+qOLr4w=; b=mPloP3H6SohEJfqd8eydxPm0a2qijG9XzqgpCL+YdvK2HZOLRfDlaRKiiamtvmJsW6/IBWWMZmUUi4IV/npFDGfhhvOV+sfejtawo6DG8Hs2u3NyFY7FGyT3KN8bUVtn5EiaWMkxcphlW7EHSr24TqlA4CX1x2dNFH++MWkp2ko= ARC-Authentication-Results: i=1; mx.zoho.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail header.from= (p=none dis=none) header.from= Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1569325571172279.238152730543; Tue, 24 Sep 2019 04:46:11 -0700 (PDT) Received: from localhost ([::1]:44356 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iCjGd-0007XO-17 for importer@patchew.org; Tue, 24 Sep 2019 07:46:03 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:42475) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iCj2i-0002l5-Au for qemu-devel@nongnu.org; Tue, 24 Sep 2019 07:31:43 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iCj2g-0005Rx-4e for qemu-devel@nongnu.org; Tue, 24 Sep 2019 07:31:39 -0400 Received: from mx1.redhat.com ([209.132.183.28]:54354) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iCj2c-0005Pz-Jw; Tue, 24 Sep 2019 07:31:34 -0400 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id DE3798830A; Tue, 24 Sep 2019 11:31:33 +0000 (UTC) Received: from kamzik.brq.redhat.com (unknown [10.43.2.160]) by smtp.corp.redhat.com (Postfix) with ESMTP id 2B72661F21; Tue, 24 Sep 2019 11:31:29 +0000 (UTC) From: Andrew Jones To: qemu-devel@nongnu.org, qemu-arm@nongnu.org Subject: [PATCH v4 7/9] target/arm/kvm: scratch vcpu: Preserve input kvm_vcpu_init features Date: Tue, 24 Sep 2019 13:31:03 +0200 Message-Id: <20190924113105.19076-8-drjones@redhat.com> In-Reply-To: <20190924113105.19076-1-drjones@redhat.com> References: <20190924113105.19076-1-drjones@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.28]); Tue, 24 Sep 2019 11:31:33 +0000 (UTC) Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, richard.henderson@linaro.org, armbru@redhat.com, eric.auger@redhat.com, imammedo@redhat.com, alex.bennee@linaro.org, Dave.Martin@arm.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Type: text/plain; charset="utf-8" kvm_arm_create_scratch_host_vcpu() takes a struct kvm_vcpu_init parameter. Rather than just using it as an output parameter to pass back the preferred target, use it also as an input parameter, allowing a caller to pass a selected target if they wish and to also pass cpu features. If the caller doesn't want to select a target they can pass -1 for the target which indicates they want to use the preferred target and have it passed back like before. Signed-off-by: Andrew Jones Reviewed-by: Richard Henderson Reviewed-by: Eric Auger --- target/arm/kvm.c | 20 +++++++++++++++----- target/arm/kvm32.c | 6 +++++- target/arm/kvm64.c | 6 +++++- 3 files changed, 25 insertions(+), 7 deletions(-) diff --git a/target/arm/kvm.c b/target/arm/kvm.c index 72569f71236e..7a540d9591f9 100644 --- a/target/arm/kvm.c +++ b/target/arm/kvm.c @@ -66,7 +66,7 @@ bool kvm_arm_create_scratch_host_vcpu(const uint32_t *cpu= s_to_try, int *fdarray, struct kvm_vcpu_init *init) { - int ret, kvmfd =3D -1, vmfd =3D -1, cpufd =3D -1; + int ret =3D 0, kvmfd =3D -1, vmfd =3D -1, cpufd =3D -1; =20 kvmfd =3D qemu_open("/dev/kvm", O_RDWR); if (kvmfd < 0) { @@ -86,7 +86,14 @@ bool kvm_arm_create_scratch_host_vcpu(const uint32_t *cp= us_to_try, goto finish; } =20 - ret =3D ioctl(vmfd, KVM_ARM_PREFERRED_TARGET, init); + if (init->target =3D=3D -1) { + struct kvm_vcpu_init preferred; + + ret =3D ioctl(vmfd, KVM_ARM_PREFERRED_TARGET, &preferred); + if (!ret) { + init->target =3D preferred.target; + } + } if (ret >=3D 0) { ret =3D ioctl(cpufd, KVM_ARM_VCPU_INIT, init); if (ret < 0) { @@ -98,10 +105,12 @@ bool kvm_arm_create_scratch_host_vcpu(const uint32_t *= cpus_to_try, * creating one kind of guest CPU which is its preferred * CPU type. */ + struct kvm_vcpu_init try; + while (*cpus_to_try !=3D QEMU_KVM_ARM_TARGET_NONE) { - init->target =3D *cpus_to_try++; - memset(init->features, 0, sizeof(init->features)); - ret =3D ioctl(cpufd, KVM_ARM_VCPU_INIT, init); + try.target =3D *cpus_to_try++; + memcpy(try.features, init->features, sizeof(init->features)); + ret =3D ioctl(cpufd, KVM_ARM_VCPU_INIT, &try); if (ret >=3D 0) { break; } @@ -109,6 +118,7 @@ bool kvm_arm_create_scratch_host_vcpu(const uint32_t *c= pus_to_try, if (ret < 0) { goto err; } + init->target =3D try.target; } else { /* Treat a NULL cpus_to_try argument the same as an empty * list, which means we will fail the call since this must diff --git a/target/arm/kvm32.c b/target/arm/kvm32.c index 2451a2d4bbef..32bf8d6757c4 100644 --- a/target/arm/kvm32.c +++ b/target/arm/kvm32.c @@ -53,7 +53,11 @@ bool kvm_arm_get_host_cpu_features(ARMHostCPUFeatures *a= hcf) QEMU_KVM_ARM_TARGET_CORTEX_A15, QEMU_KVM_ARM_TARGET_NONE }; - struct kvm_vcpu_init init; + /* + * target =3D -1 informs kvm_arm_create_scratch_host_vcpu() + * to use the preferred target + */ + struct kvm_vcpu_init init =3D { .target =3D -1, }; =20 if (!kvm_arm_create_scratch_host_vcpu(cpus_to_try, fdarray, &init)) { return false; diff --git a/target/arm/kvm64.c b/target/arm/kvm64.c index fc62bab8684e..f96649ae0349 100644 --- a/target/arm/kvm64.c +++ b/target/arm/kvm64.c @@ -502,7 +502,11 @@ bool kvm_arm_get_host_cpu_features(ARMHostCPUFeatures = *ahcf) KVM_ARM_TARGET_CORTEX_A57, QEMU_KVM_ARM_TARGET_NONE }; - struct kvm_vcpu_init init; + /* + * target =3D -1 informs kvm_arm_create_scratch_host_vcpu() + * to use the preferred target + */ + struct kvm_vcpu_init init =3D { .target =3D -1, }; =20 if (!kvm_arm_create_scratch_host_vcpu(cpus_to_try, fdarray, &init)) { return false; --=20 2.20.1