From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 35533C0218A for ; Mon, 27 Jan 2025 13:10:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type:MIME-Version: Message-ID:Date:References:In-Reply-To:Subject:Cc:To:From:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=fxX+mEqKJD0CHD6qtOyAAeaxEGqT+AqliDTEYbLd0Ro=; b=NGs92vp55PZ8Uyba3V5aD2B7+y 2O0bnc9r+S54Z49gbb25nICjJCdrlMUYyONd+XuzfiuLQnzi/Iy49zkE/I/hevRkqF+JCPcwc8eMU L40/fyZeOmRl+/rEpIjLrfsMoFB+dR4pbhY52+fgZ4+y15upesujaf7yVSjn5Nv9AJP/p5UOnTpkE WbZQtMisICnz2abQlTJbWdySKi0ZsURWvP0qRxokIIyusTpk4y/3PQgmunfUhZh3Rlm5a23dT9LL1 9oPJ+8M7gAHoFs6Qvrzxf5ro96vRK8DrNsgaeBt/ajQOcKGmRKhPe9cGSXYDGTsSH7CiFPnOqlXl1 LmPc2Lww==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tcOsG-00000002LP5-2dOq; Mon, 27 Jan 2025 13:09:56 +0000 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tcOZd-00000002JH9-23X1 for linux-arm-kernel@lists.infradead.org; Mon, 27 Jan 2025 12:50:42 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1737982240; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=fxX+mEqKJD0CHD6qtOyAAeaxEGqT+AqliDTEYbLd0Ro=; b=eQCeAFCyRcWsTqDKjeNdqk/xvL+nioW+nIbImOTG/oJKm34yHZUE+JSAlKtsrU+TopRyx4 kP8Ccl1UAd7wdulc1JsopCcc3FJ0pwdnW2kyRyBE0qUxz4oe6d4O/ZunrvDnk9hLrut4nu DNetqWhGrPWCDWCPEOOJPcPtEqSl8J0= Received: from mx-prod-mc-01.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-197-7x30Q1uBOwWnTcmbkIgsxw-1; 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> 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: rLu5wL-ni_IWUpfR0v6VALnp6N9M3cFqTWY1rTX0QhA_1737982234 X-Mimecast-Originator: redhat.com Content-Type: text/plain X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250127_045041_602984_1B6EF8AD X-CRM114-Status: GOOD ( 10.23 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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