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Fri, 19 Jun 2020 11:55:15 -0400 Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-232-an-RjqUnOU2a1z51WD2Ghw-1; Fri, 19 Jun 2020 11:54:03 -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 mimecast-mx01.redhat.com (Postfix) with ESMTPS id 79C6C18C6EEA; Fri, 19 Jun 2020 15:53:54 +0000 (UTC) Received: from localhost.localdomain.com (ovpn-112-254.ams2.redhat.com [10.36.112.254]) by smtp.corp.redhat.com (Postfix) with ESMTP id A1DD95BAD3; Fri, 19 Jun 2020 15:53:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1592582112; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=ONVIMPFVgNlQCWartogeNcXUxw3XoJkJEtWznEeVhjk=; b=COyqoN8VhOkGQxSbCY60yzjM7sjnX1NTzXT1cTxFDEb3onBV+1kbVANWoR61QnxzU9z7hU ZanvQ7vRie+47pD5HvO9yNVyRa10m4y8Ad7UN8bC5GjXteBuF5uuC17VBOzjYvKoOz+d1+ nAOaYuiU7LApxQDJdzy2YtPbSSzQ+n4= X-MC-Unique: an-RjqUnOU2a1z51WD2Ghw-1 From: Mohammed Gamal To: qemu-devel@nongnu.org, pbonzini@redhat.com Subject: [PATCH 1/2] kvm: Add support for KVM_CAP_HAS_SMALLER_MAXPHYADDR Date: Fri, 19 Jun 2020 17:53:43 +0200 Message-Id: <20200619155344.79579-2-mgamal@redhat.com> In-Reply-To: <20200619155344.79579-1-mgamal@redhat.com> References: <20200619155344.79579-1-mgamal@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 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=207.211.31.81; envelope-from=mgamal@redhat.com; helo=us-smtp-delivery-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/06/19 01:50:04 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -30 X-Spam_score: -3.1 X-Spam_bar: --- X-Spam_report: (-3.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1, 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=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=_AUTOLEARN X-Spam_action: no action 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: mtosatti@redhat.com, Mohammed Gamal , ehabkost@redhat.com, kvm@vger.kernel.org, rth@twiddle.net Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" This adds the KVM_CAP_HAS_SMALLER_MAXPHYADDR capability and a helper function to check for this capability. This will allow QEMU to decide to what to do if the host CPU can't handle GUEST_MAXPHYADDR < HOST_MAXPHYADDR properly. Signed-off-by: Mohammed Gamal --- linux-headers/linux/kvm.h | 1 + target/i386/kvm.c | 5 +++++ target/i386/kvm_i386.h | 1 + 3 files changed, 7 insertions(+) diff --git a/linux-headers/linux/kvm.h b/linux-headers/linux/kvm.h index 9804495a46..9eb61a303f 100644 --- a/linux-headers/linux/kvm.h +++ b/linux-headers/linux/kvm.h @@ -1017,6 +1017,7 @@ struct kvm_ppc_resize_hpt { #define KVM_CAP_S390_VCPU_RESETS 179 #define KVM_CAP_S390_PROTECTED 180 #define KVM_CAP_PPC_SECURE_GUEST 181 +#define KVM_CAP_SMALLER_MAXPHYADDR 184 =20 #ifdef KVM_CAP_IRQ_ROUTING =20 diff --git a/target/i386/kvm.c b/target/i386/kvm.c index b3c13cb898..01100dbf20 100644 --- a/target/i386/kvm.c +++ b/target/i386/kvm.c @@ -136,6 +136,11 @@ bool kvm_has_smm(void) return kvm_check_extension(kvm_state, KVM_CAP_X86_SMM); } =20 +bool kvm_has_smaller_maxphyaddr(void) +{ + return kvm_check_extension(kvm_state, KVM_CAP_SMALLER_MAXPHYADDR); +} + bool kvm_has_adjust_clock_stable(void) { int ret =3D kvm_check_extension(kvm_state, KVM_CAP_ADJUST_CLOCK); diff --git a/target/i386/kvm_i386.h b/target/i386/kvm_i386.h index 00bde7acaf..513f8eebbb 100644 --- a/target/i386/kvm_i386.h +++ b/target/i386/kvm_i386.h @@ -34,6 +34,7 @@ =20 bool kvm_allows_irq0_override(void); bool kvm_has_smm(void); +bool kvm_has_smaller_maxphyaddr(void); bool kvm_has_adjust_clock_stable(void); bool kvm_has_exception_payload(void); void kvm_synchronize_all_tsc(void); --=20 2.26.2