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 8B787D2D10D for ; Tue, 13 Jan 2026 14:21:16 +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-Transfer-Encoding: Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Subject:CC:To: From:Date:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=QuG0Y5tDphbzQVDqJb5GShiSFpO9VPfUhZBFRZWsO8g=; b=NtYy+GYyMTRdBtQWa+5wpeMboF bcUb0oWs45dRnTTNBHD9qDRnnlItmWJ0+XaOQMimeHbfnPyB67tpos6/PHCM9PtXjy3r8MM5kizKi 9v2V3tCFbhCYESfXNlL4Jc/SGU21kcEwHeo0VRkwm9EqlUHYLH4G4iNapaANFJ5yjUEgUWau5FPm6 wiF9FWPLLs5+YUmcEbwcpGlGluYbzHei+9akqzuXx/n3aQZ4z84D4GoPce5R6UYVxii0Ldtip6BdR 2M8x77Rfm9LwSBbGgtvqjTM52qEyefEOLyLMWbego1Pdf4xsGBw9mAe9wQ4Cx58kFupg4f2gG6hsE n+Rx97XA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vffGh-00000007Exz-3LrQ; Tue, 13 Jan 2026 14:21:11 +0000 Received: from frasgout.his.huawei.com ([185.176.79.56]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vffGf-00000007ExU-3329 for linux-arm-kernel@lists.infradead.org; Tue, 13 Jan 2026 14:21:10 +0000 Received: from mail.maildlp.com (unknown [172.18.224.107]) by frasgout.his.huawei.com (SkyGuard) with ESMTPS id 4drBHT5c2LzJ46ZX; Tue, 13 Jan 2026 22:20:53 +0800 (CST) Received: from dubpeml100005.china.huawei.com (unknown [7.214.146.113]) by mail.maildlp.com (Postfix) with ESMTPS id D801340585; Tue, 13 Jan 2026 22:21:06 +0800 (CST) Received: from localhost (10.203.177.15) by dubpeml100005.china.huawei.com (7.214.146.113) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.36; Tue, 13 Jan 2026 14:21:05 +0000 Date: Tue, 13 Jan 2026 14:21:04 +0000 From: Jonathan Cameron To: Ben Horgan CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: Re: [PATCH v3 13/47] KVM: arm64: Use kernel-space partid configuration for hypercalls Message-ID: <20260113142104.00002641@huawei.com> In-Reply-To: <20260112165914.4086692-14-ben.horgan@arm.com> References: <20260112165914.4086692-1-ben.horgan@arm.com> <20260112165914.4086692-14-ben.horgan@arm.com> X-Mailer: Claws Mail 4.3.0 (GTK 3.24.42; x86_64-w64-mingw32) MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit X-Originating-IP: [10.203.177.15] X-ClientProxiedBy: lhrpeml100009.china.huawei.com (7.191.174.83) To dubpeml100005.china.huawei.com (7.214.146.113) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260113_062109_911399_3AB79C47 X-CRM114-Status: UNSURE ( 9.16 ) X-CRM114-Notice: Please train this message. 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 Mon, 12 Jan 2026 16:58:40 +0000 Ben Horgan wrote: > On nVHE systems whether or not MPAM is enabled, EL2 continues to use > partid-0 for hypercalls, even when the host may have configured its kernel > threads to use a different partid. 0 may have been assigned to another > task. Copy the EL1 MPAM register to EL2. This ensures hypercalls use the > same partid as the kernel thread does on the host. > > Signed-off-by: Ben Horgan Reviewed-by: Jonathan Cameron > --- > Changes since v2: > Use mask > Use read_sysreg_el1 to cope with hvhe nvhe