From nobody Sun Feb 8 04:31:05 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 14749366FCC; Thu, 30 Oct 2025 15:49:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761839366; cv=none; b=IRoeMVzMOoMB1DTwBC7RRZOwchV6PDfmPtOOrxjNc5XWdmeN/SjbYCCp8aaY7ucu6X+P8O5sntfS3ExdzfRExyfDWmuyy4xzVUzF60gU98rnF2mUkI9zvJOffVr+KvKqm7WMtuMn6Tqfx4puC3vOlVFnNb6stSDZcjq/nbgiKs4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761839366; c=relaxed/simple; bh=CwOIisKHYvAmRG+wWlhNJEzBcAlffhoo6ItwxUKDQVM=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=m8JBUBmHX7WY5vQWSukwMzJD49Ig+LdSD9H5vSI8Rh5hKO1htmjI/ftaOTxhibSNCCVvM+eK4w0065dek0Up++076f/q/mWiMps43iysLbOnTzTzOBluFGe9TE4ivPWA6IBV5I1r+vjGTq1fzCNAzElwBfS7OuLqIPiycWq4sNU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Qih5DTbs; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Qih5DTbs" Received: by smtp.kernel.org (Postfix) with ESMTPS id B048CC4CEFF; Thu, 30 Oct 2025 15:49:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1761839365; bh=CwOIisKHYvAmRG+wWlhNJEzBcAlffhoo6ItwxUKDQVM=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=Qih5DTbs1bmHHQPQGQ/MG61Vcp2HIcGTLEUARlS/AaBvCE8HBt5R4c9ml7aNGj8OV RWFUZKCm1mCNGX04MHtazot94u3ZtiT6vfHMOSzHvUefk98ZcbYArIII1MODFxIRzb jOzVAleuo7WFckrLOX+EOX6dLYUS1t0sSEktiiKhvcyo/oM4Dr/A1QECAdhSJem+Ha mXMbKjX4EoPzEoFtTZJKJ5N0Im9aCN5LtyDqSRT2j729O8DGfXznSOVLcoGyQTsfCn RWgLne2qJQHlQxfbPHHzSJ35EsXpJPlBWbXz+RM6GRipkT9MKNrd+WzOLV0ZIWCWQU xoQYw5VaSQDRA== 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 A644DCCF9E3; Thu, 30 Oct 2025 15:49:25 +0000 (UTC) From: Per Larsen via B4 Relay Date: Thu, 30 Oct 2025 15:49:16 +0000 Subject: [PATCH v2 1/2] KVM: arm64: Support FFA_MSG_SEND_DIRECT_REQ in host handler Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20251030-host-direct-messages-v2-1-9f27cef36730@google.com> References: <20251030-host-direct-messages-v2-0-9f27cef36730@google.com> In-Reply-To: <20251030-host-direct-messages-v2-0-9f27cef36730@google.com> To: Marc Zyngier , Oliver Upton , Joey Gouly , Suzuki K Poulose , Zenghui Yu , Catalin Marinas , Will Deacon , Yeoreum Yun , Ben Horgan Cc: Armelle Laine , Sebastien Ene , linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, linux-kernel@vger.kernel.org, Per Larsen X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1761839364; l=1403; i=perlarsen@google.com; s=20250508; h=from:subject:message-id; bh=0LYGXDdF4rmG4qPqoYjpVqiYwow3EdKdfM03tgJvlB8=; b=98ShcxNmKo+TYyhHfNO6sEe4kutfeS5ubK1MWanjdr47EqL8e72h8ydRgWSNEFMlqezCsPBO9 gQxfzEzc+yRB6NQGIqnuuGjJdqC1lk/wC4Dw7WTINrm0H3gWSPOvvH7 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 Reply-To: perlarsen@google.com From: Sebastian Ene Allow direct messages to be forwarded from the host. Signed-off-by: Sebastian Ene Signed-off-by: Per Larsen Reviewed-by: Yeoreum Yun --- arch/arm64/kvm/hyp/nvhe/ffa.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/arch/arm64/kvm/hyp/nvhe/ffa.c b/arch/arm64/kvm/hyp/nvhe/ffa.c index 4e16f9b96f637599873b16148c6e40cf1210aa3e..bb38ee7c86bad1646c16c562127= eb3bef6297a84 100644 --- a/arch/arm64/kvm/hyp/nvhe/ffa.c +++ b/arch/arm64/kvm/hyp/nvhe/ffa.c @@ -857,6 +857,15 @@ static void do_ffa_part_get(struct arm_smccc_1_2_regs = *res, hyp_spin_unlock(&host_buffers.lock); } =20 +static void do_ffa_direct_msg(struct arm_smccc_1_2_regs *res, + struct kvm_cpu_context *ctxt, + u64 vm_handle) +{ + struct arm_smccc_1_2_regs *args =3D (void *)&ctxt->regs.regs[0]; + + arm_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; @@ -915,6 +924,10 @@ 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, HOST_FFA_ID); + goto out_handled; } =20 if (ffa_call_supported(func_id)) --=20 2.51.1.851.g4ebd6896fd-goog From nobody Sun Feb 8 04:31:05 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3CFC1366FBF; Thu, 30 Oct 2025 15:49:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761839366; cv=none; b=htawwGWumrkPxcdhU4Xn/Ewpn9XnUAC5x5I+/gHyDqr/onv5M3ZJtpZ1Mg8YxUt0qBd6VWRjKD9Rv1c89bylRxlLD5z5EqE9ZhPeqwanroj4S+uWoNrctVeE3uAXfI15xQw8dtR+O6wEL+RdLIt7hvGOja9zo6MJRE7BhqqrEvg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; 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Thu, 30 Oct 2025 15:49:25 +0000 (UTC) From: Per Larsen via B4 Relay Date: Thu, 30 Oct 2025 15:49:17 +0000 Subject: [PATCH v2 2/2] KVM: arm64: Support FFA_MSG_SEND_DIRECT_REQ2 in host handler Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20251030-host-direct-messages-v2-2-9f27cef36730@google.com> References: <20251030-host-direct-messages-v2-0-9f27cef36730@google.com> In-Reply-To: <20251030-host-direct-messages-v2-0-9f27cef36730@google.com> To: Marc Zyngier , Oliver Upton , Joey Gouly , Suzuki K Poulose , Zenghui Yu , Catalin Marinas , Will Deacon , Yeoreum Yun , Ben Horgan Cc: Armelle Laine , Sebastien Ene , linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, linux-kernel@vger.kernel.org, Per Larsen X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1761839365; l=1929; i=perlarsen@google.com; s=20250508; h=from:subject:message-id; bh=9bdBd6zR/vrzbrRhnFCq/xFlDZJ4V6WRjWnGzzMGAW0=; b=fG8i5Y3uwvHySl80k0XI5clMqz5JSg7rKU3ajXxZfswA/pf/+18oowHhiWp9GDxpEj81j2R12 FXSlsvmovVXBV1SqfaJrQPEUeDiy1M2myGl0aMx/64ORRnQZPWX/1fG 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 Reply-To: perlarsen@google.com From: Per Larsen FF-A 1.2 adds the DIRECT_REQ2 messaging interface which is similar to the existing FFA_MSG_SEND_DIRECT_{REQ,RESP} functions and can use the existing handler function. Add support for FFA_MSG_SEND_DIRECT_REQ2 in the host ffa handler. Signed-off-by: Per Larsen Reviewed-by: Yeoreum Yun --- arch/arm64/kvm/hyp/nvhe/ffa.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/arch/arm64/kvm/hyp/nvhe/ffa.c b/arch/arm64/kvm/hyp/nvhe/ffa.c index bb38ee7c86bad1646c16c562127eb3bef6297a84..956c408bdae45b087286d9d3534= 8ef599b83e392 100644 --- a/arch/arm64/kvm/hyp/nvhe/ffa.c +++ b/arch/arm64/kvm/hyp/nvhe/ffa.c @@ -678,8 +678,10 @@ static bool ffa_call_supported(u64 func_id) case FFA_NOTIFICATION_SET: case FFA_NOTIFICATION_GET: case FFA_NOTIFICATION_INFO_GET: + return false; /* Optional interfaces added in FF-A 1.2 */ case FFA_MSG_SEND_DIRECT_REQ2: /* Optional per 7.5.1 */ + return hyp_ffa_version >=3D FFA_VERSION_1_2; case FFA_MSG_SEND_DIRECT_RESP2: /* Optional per 7.5.1 */ case FFA_CONSOLE_LOG: /* Optional per 13.1: not in Table 13.1 */ case FFA_PARTITION_INFO_GET_REGS: /* Optional for virtual instances per 1= 3.1 */ @@ -924,6 +926,10 @@ 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_REQ2: + if (!ffa_call_supported(func_id)) + goto out_not_supported; + fallthrough; case FFA_MSG_SEND_DIRECT_REQ: case FFA_FN64_MSG_SEND_DIRECT_REQ: do_ffa_direct_msg(&res, host_ctxt, HOST_FFA_ID); @@ -933,6 +939,7 @@ bool kvm_host_ffa_handler(struct kvm_cpu_context *host_= ctxt, u32 func_id) if (ffa_call_supported(func_id)) return false; /* Pass through */ =20 +out_not_supported: ffa_to_smccc_error(&res, FFA_RET_NOT_SUPPORTED); out_handled: ffa_set_retval(host_ctxt, &res); --=20 2.51.1.851.g4ebd6896fd-goog