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 16340C61DE2 for ; Sun, 30 Aug 2026 23:09:06 +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=noF3/eViW3koYgLiNyJQ/9dElaUy7ttZb9BVjDl8RJ8=; b=RPrBcs0ZKaluVIrniI8u7vJ42S iX8v5nV8h2l5NO1twlSt/21FMALjMLLbSHoTG+52AA1G59swDDXEigRceMW+ikZ7tGjJH4nnKMHXJ uy7/8QhSoOHomzxZwhf69M09xYu1n8wY1qN9/x6uLv0w3J4N27iwmC/4oyH/+yhqkDZRj8LcSDRmo njriD2fxkzFRJ8KUr7EO35VmjZHvF1lfIknsaamim6uze01oa0D7bof3dIryqN2mnw61PZ21DSUlR ImhTol2LX/Z1bSMcAETKRlG3PjPghCJzSMwiKFj06Vi00ARA2p4C4ROliIRTBaXBFHiaJk/QpEdLN 0ZSmCKsQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1x0odi-00000008Cl4-1Mvc; Sun, 30 Aug 2026 23:08:38 +0000 Received: from sea.source.kernel.org ([2600:3c0a:e001:78e:0:1991:8:25]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1x0odg-00000008Ckc-2nf4 for linux-arm-kernel@lists.infradead.org; Sun, 30 Aug 2026 23:08:36 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id 3C98643EAB; Sun, 30 Aug 2026 23:08:36 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPS id 00A84C2BCF5; Sun, 30 Aug 2026 23:08:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1788131316; bh=jYdFQnr3uAVSj9mc50d5zTs1vATwWNTAp1myXgkY79g=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=Q1vIXEZmkF3DTjlGRcZVUHu1S1WFcnnQJO0RIJk9ZztwUgVlkw0Qk1kIdsxpHMb99 HWzUlx5cxjV6wPDtW2edfage8187gvcvnAk+weXdkas5Vj9/RT7Q35Iinx43eDLesW igYg+mKGTec7FSA0RGTPGB6ATxf/hFZQG8nessEYS3OpaZUKnmyApG9S4iLQEIXHeE GDDjbDcI3CP0hu6IzHR6ely9Wwb0Cv9iCE2oa7FEQpP0URAwKMt0lDegdMZKusGRBY SxB1tXDqWDwUXT3A9/x2lyUx6trDkKmujykfoGKU/9ael49eZjxwgIDF4AP9eBN/qi gNja4XUj/gNFQ== 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 D3FABC61DE8; Sun, 30 Aug 2026 23:08:35 +0000 (UTC) From: Per Larsen via B4 Relay Date: Sun, 30 Aug 2026 23:08:14 +0000 Subject: [PATCH v7 2/3] KVM: arm64: Support FFA_MSG_SEND_DIRECT_REQ in host handler MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260830-host-direct-messages-v7-2-45f6e6db72c2@google.com> References: <20260830-host-direct-messages-v7-0-45f6e6db72c2@google.com> In-Reply-To: <20260830-host-direct-messages-v7-0-45f6e6db72c2@google.com> To: Marc Zyngier , Joey Gouly , Suzuki K Poulose , Zenghui Yu , Catalin Marinas , Will Deacon , Yeoreum Yun , Ben Horgan , Oliver Upton Cc: Sebastien Ene , linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, linux-kernel@vger.kernel.org, Per Larsen , Fuad Tabba X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1788131315; l=2460; i=perlarsen@google.com; s=20250508; h=from:subject:message-id; bh=rJjD1X1aOzt7FsDkT8i5+1EQ5DBJ0OYaQuGPIhMalLI=; b=12JfTKZC/AlyFM8O1hZTlg+a8bQsSTxyTqDgAARC3BvK9OyL0XQ5YQCq0eAlC0nYBtVEM4AA9 HQrKhzr23/PDnFpQ0G4qN4zlZeQILKjGmMf2F6pwL87eDwCOcQUZrVi 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-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: Sebastian Ene Allow direct messages to be forwarded from the host. The host should not be sending framework messages so they are filtered out. Signed-off-by: Sebastian Ene Reviewed-by: Yeoreum Yun Signed-off-by: Per Larsen --- arch/arm64/kvm/hyp/nvhe/ffa.c | 27 +++++++++++++++++++++++++++ include/linux/arm_ffa.h | 2 ++ 2 files changed, 29 insertions(+) diff --git a/arch/arm64/kvm/hyp/nvhe/ffa.c b/arch/arm64/kvm/hyp/nvhe/ffa.c index 9e8bb95e8845..96cf6be969de 100644 --- a/arch/arm64/kvm/hyp/nvhe/ffa.c +++ b/arch/arm64/kvm/hyp/nvhe/ffa.c @@ -880,6 +880,29 @@ static void do_ffa_part_get(struct arm_smccc_1_2_regs *res, hyp_spin_unlock(&host_buffers.lock); } +static void do_ffa_direct_msg(struct arm_smccc_1_2_regs *res, + struct kvm_cpu_context *ctxt) +{ + DECLARE_REG(u64, endp, ctxt, 1); + DECLARE_REG(u64, flags, ctxt, 2); + + struct arm_smccc_1_2_regs *args = (void *)&ctxt->regs.regs[0]; + + if (upper_32_bits(endp) || + FIELD_GET(FFA_SRC_ENDPOINT_MASK, endp) != HOST_FFA_ID) { + ffa_to_smccc_error(res, FFA_RET_INVALID_PARAMETERS); + return; + } + + /* filter out framework messages and validate SBZ/MBZ bits */ + if (flags) { + ffa_to_smccc_error(res, FFA_RET_INVALID_PARAMETERS); + return; + } + + hyp_smccc_1_2_smc(args, res); +} + bool kvm_host_ffa_handler(struct kvm_cpu_context *host_ctxt, u32 func_id) { struct arm_smccc_1_2_regs res = {0}; @@ -938,6 +961,10 @@ bool kvm_host_ffa_handler(struct kvm_cpu_context *host_ctxt, u32 func_id) case FFA_PARTITION_INFO_GET: do_ffa_part_get(&res, host_ctxt); goto out_handled; + case FFA_MSG_SEND_DIRECT_REQ: + case FFA_FN64_MSG_SEND_DIRECT_REQ: + do_ffa_direct_msg(&res, host_ctxt); + goto out_handled; } if (ffa_call_supported(func_id)) diff --git a/include/linux/arm_ffa.h b/include/linux/arm_ffa.h index e71d83ee0aef..a3f44e7c08de 100644 --- a/include/linux/arm_ffa.h +++ b/include/linux/arm_ffa.h @@ -269,6 +269,8 @@ bool ffa_partition_check_property(struct ffa_device *dev, u32 property) (ffa_partition_check_property(dev, FFA_PARTITION_DIRECT_REQ2_RECV) && \ !dev->mode_32bit) +#define FFA_SRC_ENDPOINT_MASK GENMASK(31, 16) + /* For use with FFA_MSG_SEND_DIRECT_{REQ,RESP} which pass data via registers */ struct ffa_send_direct_data { unsigned long data0; /* w3/x3 */ -- 2.55.0.897.gb25b4bd76c-goog