From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wm1-f73.google.com (mail-wm1-f73.google.com [209.85.128.73]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 112DC44E04A for ; Tue, 16 Jun 2026 15:42:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.73 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781624542; cv=none; b=LBiCSEu3jws9zzeZw2JQY+YmYyCQTat8poSEMWVDR9tVuF7Xby0yQ2PlT6sT6AAwyMdybdhaj5VekD43hXp2dsBLlvJ/Zb1iwfXVeATWlflGiMo4KvOAMEm8D8UGqygPOPKR9R7J59QuIW1s7+ZCMddteBfAmQCqNGrDtUbJl3c= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781624542; c=relaxed/simple; bh=13Ul7XISNDju5zRITjTtjr87pKIgUC6qrEq8vBeAHK0=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=nI8hzyuWlP/xIpY0zbK2JKudoeLsHlO4B/WrYgCNTB5KEJuPQScLmPL5K1Pmt933mUQ20JUTr2E2sO9EKbtwMG52k/DKF5UVyCyV17lYASwadz804TalqD0vX4HDE1iV4IoMKYhqRqhKw6LGq4jov/h0kFJwsdSPlmzGv4ybwK8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--sebastianene.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=IqR9voQN; arc=none smtp.client-ip=209.85.128.73 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--sebastianene.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="IqR9voQN" Received: by mail-wm1-f73.google.com with SMTP id 5b1f17b1804b1-490b37e1f47so34549365e9.0 for ; Tue, 16 Jun 2026 08:42:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1781624539; x=1782229339; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=OOaGjTb4ag+IPG6k0DLB6nE7+R/nX4tnydOkOxde2U4=; b=IqR9voQNPDCZF3CoFEH7wdop/d3a+X/lYFQhj0vecoqn+V8xRu44XhrlCSXedSLVa0 dUmbs3tb15uALDC7P8QKRNasG9gXM8ZB7Odsk8uNPAW6Zjgcp3BLGUd4nr0Gn7gBjFlI 7bvV7n4D8ncrF1ImamUGirNTCUvg80YyB4oWv7iSKMoFiwwtlGF0gH24onnR2rhh9pgX NzS8Z1Rafj5MkUvy1Bs6jSdKxOYdE6cwj12HLVPT/P2Yv+9EOXbvnNjNHpZqmD1bJBCe WUTKyfLuSn43hhcKtph9araFu52kPFrHUN8c4Gq3EewYLjWigIWHYa7cDxUBVI5jFJLb 8V2w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1781624539; x=1782229339; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=OOaGjTb4ag+IPG6k0DLB6nE7+R/nX4tnydOkOxde2U4=; b=lvP00sOF6xzyDiqdCRx3uPRcEZt4qMxFi7Bbx3AGO4T0Tcp/lu4RdTBkf9pf/ddkkN Ec+h/R7TQvcT42TpANMoZeCFD0ZgN3TC+LXwG6soAGDWEckjnWA0It4UpjcFyzRGYE9r yiOEThmaf8CzGYn21J4eHotHvEXoafj9+il4ZZV+JGLqCdoAw5ngZWZjGddeg6Xbn2HL VroIokLgVqhHN2x11RZ5Y16XEshXTsjsIZzOOuYxkf2NsN8ZLIaPW5vSBXs+3Na4iGUk Qw/q3NXfDhHJA8KYc0XAbiyQ04PMYuq1L6puuyYT0YmDUwaFM0s2jkHHGUXXBVzU9p5j pHNw== X-Forwarded-Encrypted: i=1; AFNElJ8yIOSSZ8o87vPvQpeG+mydmKP9K+HSM6EglpPvzJkwoKeGUHGV865q/3eLOGwVkCzvwA02aVVwexlMOVU=@vger.kernel.org X-Gm-Message-State: AOJu0Yy4u3dJOF95RzEGhegzCM8dzGpD3JDasIZAZ9g8aKzrHrjD2zop O3fAJXZq3a8w2A1bxnzDJQ59Rr4Jk/tK5M9tJcu3S1YKT/MzQ5IxthlqZx9A+nI+ajWOArzFG+F kUWjcvUjKMHmO6YAtgBhVjxHQy4JcUw== X-Received: from wmxb4-n2.prod.google.com ([2002:a05:600d:8444:20b0:490:4477:50d3]) (user=sebastianene job=prod-delivery.src-stubby-dispatcher) by 2002:a05:600c:628c:b0:48e:6db3:ff2e with SMTP id 5b1f17b1804b1-492333a8f49mr1025675e9.15.1781624538850; Tue, 16 Jun 2026 08:42:18 -0700 (PDT) Date: Tue, 16 Jun 2026 15:41:48 +0000 In-Reply-To: <20260616154149.2763214-1-sebastianene@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260616154149.2763214-1-sebastianene@google.com> X-Mailer: git-send-email 2.54.0.1136.gdb2ca164c4-goog Message-ID: <20260616154149.2763214-7-sebastianene@google.com> Subject: [PATCH v4 6/7] KVM: arm64: Support FFA_NOTIFICATION_GET in host handler From: Sebastian Ene To: catalin.marinas@arm.com, maz@kernel.org, oupton@kernel.org, will@kernel.org Cc: joey.gouly@arm.com, korneld@google.com, kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, android-kvm@google.com, mrigendra.chaubey@gmail.com, perlarsen@google.com, sebastianene@google.com, suzuki.poulose@arm.com, vdonnefort@google.com, yuzenghui@huawei.com Content-Type: text/plain; charset="UTF-8" Allow FF-A notification GET messages to be proxied from the pKVM hypervisor to Trustzone and enforce MBZ/SBZ fields. Signed-off-by: Sebastian Ene --- arch/arm64/kvm/hyp/nvhe/ffa.c | 30 +++++++++++++++++++++++++++++- 1 file changed, 29 insertions(+), 1 deletion(-) diff --git a/arch/arm64/kvm/hyp/nvhe/ffa.c b/arch/arm64/kvm/hyp/nvhe/ffa.c index fdf1e5fb6726..de4794338388 100644 --- a/arch/arm64/kvm/hyp/nvhe/ffa.c +++ b/arch/arm64/kvm/hyp/nvhe/ffa.c @@ -716,7 +716,6 @@ static bool ffa_call_supported(u64 func_id) case FFA_MEM_DONATE: case FFA_MEM_RETRIEVE_REQ: /* Optional notification interfaces added in FF-A 1.1 */ - case FFA_NOTIFICATION_GET: case FFA_NOTIFICATION_INFO_GET: /* Optional interfaces added in FF-A 1.2 */ case FFA_MSG_SEND_DIRECT_REQ2: /* Optional per 7.5.1 */ @@ -1001,6 +1000,32 @@ static void do_ffa_notif_set(struct arm_smccc_1_2_regs *res, hyp_smccc_1_2_smc(args, res); } +static void do_ffa_notif_get(struct arm_smccc_1_2_regs *res, + struct kvm_cpu_context *ctxt) +{ + DECLARE_REG(u32, endp_id, ctxt, 1); + DECLARE_REG(u32, flags, ctxt, 2); + struct arm_smccc_1_2_regs *args; + + if (FIELD_GET(FFA_NOTIF_RECEIVER_ENDP_MASK, endp_id) != HOST_FFA_ID) { + ffa_to_smccc_res(res, FFA_RET_INVALID_PARAMETERS); + return; + } + + if (ffa_check_unused_args_sbz(ctxt, 3)) { + ffa_to_smccc_res(res, FFA_RET_INVALID_PARAMETERS); + return; + } + + if (flags & GENMASK(31, 4)) { + ffa_to_smccc_res(res, FFA_RET_INVALID_PARAMETERS); + return; + } + + args = (void *)&ctxt->regs.regs[0]; + 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; @@ -1072,6 +1097,9 @@ bool kvm_host_ffa_handler(struct kvm_cpu_context *host_ctxt, u32 func_id) case FFA_NOTIFICATION_SET: do_ffa_notif_set(&res, host_ctxt); goto out_handled; + case FFA_NOTIFICATION_GET: + do_ffa_notif_get(&res, host_ctxt); + goto out_handled; } if (ffa_call_supported(func_id)) -- 2.54.0.1136.gdb2ca164c4-goog