From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A92EF606B7AD for ; Thu, 22 Oct 2026 17:35:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=lists.infradead.org header.i=@lists.infradead.org header.a=rsa-sha256 header.s=bombadil.20210309 header.b=uyUp8mFJ; dkim=pass (1024-bit key, unprotected) header.d=linux.dev header.i=@linux.dev header.a=rsa-sha256 header.s=key1 header.b=lebqlN/r 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:Date:Subject:Cc: To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Unsubscribe-Post: List-Owner; bh=UhyAbw4qoriwhozaXu+XfZddUYSkASyU0+JOd2C+mS0=; b=uyUp8mFJU1+Yyq dEYiw/HIUs/7GMjfggs8aVAcfa75AwQ40ILF3WVDxKaV6XeT5O53tF7Lsy+odNLzqEJTFKGMM7ulJ tgeCMEGF2jv+KrRUbwjdTErq4eZjxXrub+tBe26DxHFgfcy9kgA5/DN8DOux8kD2Ac35dWg9o3R/L dYtjjS+A3GWJFFEuBHl9OsfpTQ51DiOD0lgXqBWSADSANRuDfQmIc6kpYyoL+RGvpNvUClaKmpswB NgDIIRGQ6JaPwmV5uojyj55kXoJubq9yU5nMUUkgCInPd4pVJ6QMEX/n1/vIr6Gxwjn+dAA0kFwqd boGWixrHZEvDXZm7EdUw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.100.1 #2 (Red Hat Linux)) id 1xJwh4-0000000EabV-1qM1; Thu, 22 Oct 2026 17:35:10 +0000 Received: from out-11.mta1.migadu.com ([2001:41d0:203:375::b] helo=mta1.migadu.com) by bombadil.infradead.org with esmtps (Exim 4.100.1 #2 (Red Hat Linux)) id 1xJwh1-0000000Eaat-0RuW for linux-arm-kernel@lists.infradead.org; Thu, 22 Oct 2026 17:35:09 +0000 X-Envelope-To: linux-arm-kernel@lists.infradead.org DKIM-Signature: a=rsa-sha256; bh=UhyAbw4qoriwhozaXu+XfZddUYSkASyU0+JOd2C+mS0=; c=simple/simple; d=linux.dev; h=from:to:subject:date:message-id:mime-version:content-type; s=key1; t=1792690504; v=1; x=1793295304; b=lebqlN/rZSsxlA9jgeH5wG+Q4iXisCDTIskkPc699DogTycxxjFuIW4eB1IprKxqe1mzVFaw 4vuY4gCnQkLD1W7tCzdujt8PVzEe9sArx+9qTa2PAOtNO0KFgcDN1oRaya6pHqRb4hxCzpmE+uF YQUyy4ForQ57xq9RUe0MO/P8= X-Envelope-To: linux-arm-kernel@lists.infradead.org Received: by smtp.migadu.com with ESMTPS id 3b6a465357a79fe8; Thu, 22 Oct 2026 17:35:03 +0000 X-Mizu-Trace-ID: 3b6a465357a79fe8 X-Migadu-Flow: FLOW_OUT From: Fuad Tabba To: Vincent Donnefort Cc: maz@kernel.org, oupton@kernel.org, kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org, joey.gouly@arm.com, seiden@linux.ibm.com, suzuki.poulose@arm.com, yuzenghui@huawei.com, catalin.marinas@arm.com, will@kernel.org, kernel-team@android.com, tabba@google.com Subject: Re: [PATCH v2 1/4] KVM: arm64: Make __vgic_v3_init_lrs HVC always available Date: Thu, 22 Oct 2026 18:34:59 +0100 Message-ID: <20261022173459.3692613-1-fuad.tabba@linux.dev> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20261022140048.2522787-2-vdonnefort@google.com> References: <20261022140048.2522787-1-vdonnefort@google.com> <20261022140048.2522787-2-vdonnefort@google.com> X-Archived-By: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20261022_103507_820265_9733E255 X-CRM114-Status: UNSURE ( 7.88 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -2.1 (--) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" X-Spam-Status: No, score=-13.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 Hi Vincent, On Thu, 22 Oct 2026 15:00:45 +0100, Vincent Donnefort wrote: > The __vgic_v3_init_lrs hypercall only resets the vGIC LRs. Those > registers are expected to be 0 when the host is running. As a > consequence, it is completely safe to make it available at all times, > even when pKVM is enabled and the host was deprivileged. Reviewed-by: Fuad Tabba Tested-by: Fuad Tabba Cheers, /fuad