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 4B092C87FCB for ; Wed, 30 Jul 2025 21:26:40 +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=ImmKDEUtBM7PrK+6wAWvDxz+QwPNzhe7ludYWPWsPTQ=; b=m5ThLZFTkKQmgKVxGV7Qt2wNvu Y94KmdNr5Enw5Rxvw1WOklcHPSkjUSGT1ldHAYCSyLE+OU8jBNPUiMsPoChS20pN7nxroZjqY61qT mqt7AHWrHTZK+LmebHCXZG5Ennu4PJm57U034e9BeYIa/NE1snzxgDlanX3pHi5uwX92e+1bYP8dy CnnykewFm/5jIRkvynWoNlj5ckxBQIaEY1eUqh2aECf4vODQbLCUvGabVsEhMN05Mh2bIyP+4qHAQ jBe1Erl7Y5l0iKhXtsYKcjWFU8exgmOmi50muZJyYFQz18XvYATt8j3tbljh7pLhabUiXncp7v5zp HL316LBQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1uhEJm-00000002Tw9-1SV0; Wed, 30 Jul 2025 21:26:34 +0000 Received: from sea.source.kernel.org ([2600:3c0a:e001:78e:0:1991:8:25]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1uhE8r-00000002Sqq-3ekc for linux-arm-kernel@lists.infradead.org; Wed, 30 Jul 2025 21:15:19 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id 4FB7F46303; Wed, 30 Jul 2025 21:15:17 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPS id 1F211C4AF0D; Wed, 30 Jul 2025 21:15:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1753910117; bh=ehvmTG9QreVlMg6OcuHCCXf3VqnfwjHcKBdR0xt8aDc=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=dBqQimjon9cc9FuTYW+n1MgKyLnBz2rq/EnCOZGPRXbmlJzwEa2EtQz5ee4IQbo4t a/oYOE2p77bxIzjMxX339tI0AJ2T2YCoBconffQYqlxSYWGCVY2O0exH9KZ7oguL0v gNY8Rgpe0HhXTGVsBrqSlFZdbQDYMDasWQQiS8Fzrrq65SChw1ceGX2ohWLSWtm74K 8LH8yI4Pmrs9m32hlT1xqC+UXsCa7EjHZ5s7OILwnSKM0zsbKAGfn3u9W4gSgVvwli RcpeELnrGsZDjm6RiAW9aymeU1BVBeX7mVmw/pcZEUE8OeNfMaQp67a8Vv5rbFFqnA rYnbIk0hOkvzQ== 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 162C4C87FC9; Wed, 30 Jul 2025 21:15:17 +0000 (UTC) From: Per Larsen via B4 Relay Date: Wed, 30 Jul 2025 21:15:08 +0000 Subject: [PATCH v9 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: <20250730-virtio-msg-ffa-v9-5-7f1b55c8d149@google.com> References: <20250730-virtio-msg-ffa-v9-0-7f1b55c8d149@google.com> In-Reply-To: <20250730-virtio-msg-ffa-v9-0-7f1b55c8d149@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=1753910116; l=1404; i=perlarsen@google.com; s=20250508; h=from:subject:message-id; bh=dmZ1vWZl/Z8DB9SSRWT99aiqcW400QLvm9waNv1o6lM=; b=sRoCHIfQXsIH2vwYvzb57woXK8E/mk/95HlK7n8HCQXbVfmha00ufq2QGwvnBeuZDY+siyh6W BliUlx3XlYvAVWOk3fx7g0CEYqej7aqLgCnp+PGIOOxfI3WlJFAhr1l 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-20250730_141517_958933_4B025A22 X-CRM114-Status: GOOD ( 12.60 ) 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 7fe96fe626d630a9009551e8dec1683617acafbd..6afc7e97a1e1e5e23ccf9cc11553b3fdaf8a51e7 100644 --- a/arch/arm64/kvm/hyp/nvhe/ffa.c +++ b/arch/arm64/kvm/hyp/nvhe/ffa.c @@ -737,7 +737,7 @@ 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 { -- 2.50.1.552.g942d659e1b-goog