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 6FA65CA0EEB for ; Wed, 20 Aug 2025 01:18:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:Reply-To:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:Cc:To:In-Reply-To: References:Message-Id:Content-Transfer-Encoding:Content-Type:MIME-Version: Subject:Date:From:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=BG07oObwpnHX++9CfQhH6wZ/a+w4sYfCS7nQGuftgVY=; b=xS/M+s/NLYXoQmyvYxVGnVX+qF RZbApPMxTrIl69bqOPMT4qOBEh6Irmb02NxSvvd+kaZkocq2vvev9wA/0mdYX4ickEg4cfEy55llO hscNp5PdSXaLl4bWjv4v1qgUFyDn9P/b0x7DdQM2Slv+4+PbgxRnm4wtYx6q+IXWBwmYTyZbybF4M ULtWRFd0emyzGaleac/hP/Yr6FsXdUwv691jJglWYSoyClEYO8d/vpiFRaxO9XIThaqYsvVNMoGUK 5xwt20YFFUgogywggZwYF+CcBpjFwbxaz8FKRlVAD00u6fjFto37aqp4GZn4xgVnDVQe1k2UBFTZ3 g2PioOCA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1uoXT7-0000000C4J1-1EZW; Wed, 20 Aug 2025 01:18:25 +0000 Received: from sea.source.kernel.org ([172.234.252.31]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1uoXLB-0000000C30M-3ypE for linux-arm-kernel@lists.infradead.org; Wed, 20 Aug 2025 01:10:16 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id 04532464F9; Wed, 20 Aug 2025 01:10:13 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPS id 8DA43C116D0; Wed, 20 Aug 2025 01:10:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1755652212; bh=4aIBTPvj3mlS0mFSQkiL9HbPQJIP8JJJzPIipzWkWOk=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=GzaaHHDLfhUnLJbQKiPeZehfprLhYrBCe9jn1LXOT2K5sveDm0/Qfgc8Fq0bbM0KF qyEkgfEnDH43srRVKQ/Kks6V3HpF9Z/9tnj3tHjDH5yaecrgS4usH/ufgz51IqsENi /9TzQVcx9RO/9OhKV2DnK5rxOfQuhMXdToRGFB5GcYHmHtPFmvfJc5q1rlpd6Zrqn5 +NCyDVEgC7awb+YTNmPr7OjtdeVvipcjyUK7xnFpqzeKeenfTeENL8iE8UNLuvb6B+ 4HD4Fs/Cy6NCaRI0qRhIe7/7RKw+CBnZar5jxENas5KSgnPyFILOsESCrnJUY2MVAf 8V0QoOXasfcPw== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id 85674CA0EEB; Wed, 20 Aug 2025 01:10:12 +0000 (UTC) From: Per Larsen via B4 Relay Date: Wed, 20 Aug 2025 01:10:09 +0000 Subject: [PATCH v11 5/6] KVM: arm64: Mask response to FFA_FEATURE call MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20250820-virtio-msg-ffa-v11-5-497ef43550a3@google.com> References: <20250820-virtio-msg-ffa-v11-0-497ef43550a3@google.com> In-Reply-To: <20250820-virtio-msg-ffa-v11-0-497ef43550a3@google.com> To: Marc Zyngier , Oliver Upton , Joey Gouly , Suzuki K Poulose , Zenghui Yu , Catalin Marinas , Will Deacon , Sudeep Holla Cc: linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, linux-kernel@vger.kernel.org, ahomescu@google.com, armellel@google.com, arve@android.com, ayrton@google.com, qperret@google.com, sebastianene@google.com, qwandor@google.com, Per Larsen X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1755652211; l=1408; i=perlarsen@google.com; s=20250508; h=from:subject:message-id; bh=3+r7TtwJ1pvrBzvbuh6WKHBBgdJuz5zMPQcaMPudbmc=; b=oL6lSKpTwfPP5RproVmd6Kyn1Qhr93I9kYWFlPEIJc4+cwaIz9LywwGKcsoEfOCO0kfbPhwLx Hrsx9+U9Gk4Dw99/TMvf1seMeHsl8tP6wke67qGrvkKpYwqBYeNrBA7 X-Developer-Key: i=perlarsen@google.com; a=ed25519; pk=jjc/Ta4VmrLRmMoahP6d1mBcKzvWU+nsmdtYe2oS2kQ= X-Endpoint-Received: by B4 Relay for perlarsen@google.com/20250508 with auth_id=402 X-Original-From: Per Larsen X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250819_181014_041950_EB1371F4 X-CRM114-Status: GOOD ( 12.52 ) 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: , Reply-To: perlarsen@google.com Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Per Larsen The minimum size and alignment boundary for FFA_RXTX_MAP is returned in bit[1:0]. Mask off any other bits in w2 when reading the minimum buffer size in hyp_ffa_post_init. Acked-by: Will Deacon Signed-off-by: Per Larsen --- arch/arm64/kvm/hyp/nvhe/ffa.c | 2 +- include/linux/arm_ffa.h | 1 + 2 files changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/arm64/kvm/hyp/nvhe/ffa.c b/arch/arm64/kvm/hyp/nvhe/ffa.c index 96109aa99c48741e45a2b85d8e7bf26440597398..a8ec1a94f3f8a86551895f4606918246c4ac1f39 100644 --- a/arch/arm64/kvm/hyp/nvhe/ffa.c +++ b/arch/arm64/kvm/hyp/nvhe/ffa.c @@ -739,7 +739,7 @@ static int hyp_ffa_post_init(void) if (res.a0 != FFA_SUCCESS) return -EOPNOTSUPP; - switch (res.a2) { + switch (res.a2 & FFA_FEAT_RXTX_MIN_SZ_MASK) { case FFA_FEAT_RXTX_MIN_SZ_4K: min_rxtx_sz = SZ_4K; break; diff --git a/include/linux/arm_ffa.h b/include/linux/arm_ffa.h index e1634897e159cdc208931938649eb0fb04d5a070..cd7ee4df9045dceca1c4e0dca2d533b770b1b056 100644 --- a/include/linux/arm_ffa.h +++ b/include/linux/arm_ffa.h @@ -128,6 +128,7 @@ #define FFA_FEAT_RXTX_MIN_SZ_4K 0 #define FFA_FEAT_RXTX_MIN_SZ_64K 1 #define FFA_FEAT_RXTX_MIN_SZ_16K 2 +#define FFA_FEAT_RXTX_MIN_SZ_MASK GENMASK(1, 0) /* FFA Bus/Device/Driver related */ struct ffa_device { -- 2.51.0.rc1.167.g924127e9c0-goog