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Mon, 27 Jan 2025 07:50:36 -0500 X-MC-Unique: 7x30Q1uBOwWnTcmbkIgsxw-1 X-Mimecast-MFC-AGG-ID: 7x30Q1uBOwWnTcmbkIgsxw Received: from mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.17]) (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-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id B3B0919560B0; Mon, 27 Jan 2025 12:50:33 +0000 (UTC) Received: from localhost (dhcp-192-212.str.redhat.com [10.33.192.212]) by mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 26AAE195608E; Mon, 27 Jan 2025 12:50:31 +0000 (UTC) From: Cornelia Huck To: Shameer Kolothum , kvmarm@lists.linux.dev, maz@kernel.org, oliver.upton@linux.dev Cc: catalin.marinas@arm.com, will@kernel.org, mark.rutland@arm.com, eric.auger@redhat.com, sebott@redhat.com, yuzenghui@huawei.com, wangzhou1@hisilicon.com, jiangkunkun@huawei.com, jonathan.cameron@huawei.com, anthony.jebson@huawei.com, linux-arm-kernel@lists.infradead.org, linuxarm@huawei.com Subject: Re: [PATCH v5 2/4] KVM: arm64: Introduce hypercall support for retrieving target implementations In-Reply-To: <20250124151732.6072-3-shameerali.kolothum.thodi@huawei.com> Organization: "Red Hat GmbH, Sitz: Werner-von-Siemens-Ring 12, D-85630 Grasbrunn, Handelsregister: Amtsgericht =?utf-8?Q?M=C3=BCnchen=2C?= HRB 153243, =?utf-8?Q?Gesch=C3=A4ftsf=C3=BChrer=3A?= Ryan Barnhart, Charles Cachera, Michael O'Neill, Amy Ross" References: <20250124151732.6072-1-shameerali.kolothum.thodi@huawei.com> <20250124151732.6072-3-shameerali.kolothum.thodi@huawei.com> User-Agent: Notmuch/0.38.3 (https://notmuchmail.org) Date: Mon, 27 Jan 2025 13:50:29 +0100 Message-ID: <87zfjc7756.fsf@redhat.com> Precedence: bulk X-Mailing-List: kvmarm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.0 on 10.30.177.17 X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: KU2qvGFvpr5UCsF2mX5dbMiDSLDXQoNvqoKF1tMwQ5Q_1737982234 X-Mimecast-Originator: redhat.com Content-Type: text/plain On Fri, Jan 24 2025, Shameer Kolothum wrote: > If the Guest requires migration to multiple targets, these hypercalls > will provide a way to retrieve the target CPU implementations from > the user space VMM. > > Subsequent patch will use this to enable the associated errata. > > Suggested-by: Oliver Upton > Suggested-by: Marc Zyngier > Signed-off-by: Shameer Kolothum > --- > Documentation/virt/kvm/arm/hypercalls.rst | 59 +++++++++++++++++++++++ > include/linux/arm-smccc.h | 15 ++++++ > 2 files changed, 74 insertions(+) Reviewed-by: Cornelia Huck