From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wm1-f71.google.com (mail-wm1-f71.google.com [209.85.128.71]) (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 013BA47D475 for ; Wed, 29 Jul 2026 12:13:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.71 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785327225; cv=none; b=TIlgR/XFOtPlawSQc4B7jCP6oYuCYRPS/NSg7LJYiCc1I/UZZqW3yqahd/A/uKfT9rdtZ2VxFKQ6QJ6RaDxaYDXke1KY84bGaIFLzl+zTp/evQdME4JBWQGw3ujtUDEu/SXMuY61ck2YjDE3xjdna6s6wikdY5DhkGQNOuUmJtU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785327225; c=relaxed/simple; bh=3FzMbyoVgcn9kaVOFbhZbsOMdz9Y6Ef7VAmdCGaY4Qg=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=pUmYnqZ0tdbpCj2AiloZO3Ibw8mrlFExeGpA6C0pEDUb+XWRkSRB+Neju4ZoqGfNfUIcsFaPPOZVnkuOJ9TBLhM9/mDG2aTu4YUyye2pmDutHX+U4ejiaKiyvkFbczmU6+OuI8an7IyGRp1Xzjhyettjt5VVGuZLB5DptM+mF7U= 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=ImEbauzj; arc=none smtp.client-ip=209.85.128.71 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="ImEbauzj" Received: by mail-wm1-f71.google.com with SMTP id 5b1f17b1804b1-4954fd771baso13035475e9.0 for ; Wed, 29 Jul 2026 05:13:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1785327222; x=1785932022; darn=vger.kernel.org; h=content-type:cc:to:from:subject:message-id:references:mime-version :in-reply-to:date:from:to:cc:subject:date:message-id:reply-to :content-type; bh=ZrVadIZuKWV0X7sTw0kh2j8tsXk6grXgxs5xYjL8YJ8=; b=ImEbauzjRJZFd3/yUHGNSqQYHhV8MEZl1A1VCgZ9R9mGbqCt06BJZmHv5HEzkr7ue5 J0T991kXEqD6Cc6ZM+WQDRYH5v//zUa5w7T1g6Z3fVKBYL+/G/autnbARc3i/HT3Q0iI pLsezs0a26fTAGG5J6UE9n/e0clQzd7jGzMr5iAm1CmWfQFKI1nPW43FyyCtpeTRUOrF j5FcSy2ThHI73V7d+6XNouC6Vyfz0Pvr/Du0/iXiHypHZ0dRLju5qP8w7LqDCfjdklrS HAWKMRJ1/VNoetRrYUl7jaLj2m0dVejRj1sjMjTz4CfPgSltLS0yOe7uxpSEcircfwGK Y30Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1785327222; x=1785932022; h=content-type: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:content-type; bh=ZrVadIZuKWV0X7sTw0kh2j8tsXk6grXgxs5xYjL8YJ8=; b=jTqwRh4aSg7NJvSUKV9AWYel4qmdJDrd4PM6LdeIf9PXxQLbHoR2UFpBuFQ9IxLyRj eAS/hLGPcxMMNDKiAVAjnLVgCP6J1Im7eJ0L1FxguPOVXiCe4ZRpOBYGv+RLWAj8Vk4E b5B4q3MblzaZDSVSoaqbxY6hPIoxohbPDxjD1M8geUaae7mOf3aFgAptVlVPql4CdXcB HdsKE1e8NXwwCgDNizT63Uym3qRdp90Z0b8hHpqe+YRXYCYtuVLJDz0dy2UhJBF3bipR I6H0Gpeo/wPbwSlSnnY+oHb3AmRasqWQ3fUH7Oef3/as99Ehz5b+VW9GppexzOExKMQ8 pE8g== X-Forwarded-Encrypted: i=1; AHgh+RrMG3L2C5gQFVijLZmA7GpfRVG7Rd4cKPF7cyKrW9xaQbb4c3P2XRUqi3D/Jj5RBF3xalpeZFPQIa9bglA=@vger.kernel.org X-Gm-Message-State: AOJu0YwgLBlhpGd44Fm9LFUUYa1dTeXmuUoYCzaiW03QQLAVX2x6D8Hs BAAvsDb1/cHpqrJEvf24knAytDYvscGuEK+Zr1qQ0q8RCtIx/TdP5Hr5PRQrDUiLnSocCk4Hh+3 GRYqRDTSBMcxcVZq26SdlwNkhBD1VkA== X-Received: from wmfq2.prod.google.com ([2002:a05:600c:2e42:b0:493:dccc:9e0c]) (user=sebastianene job=prod-delivery.src-stubby-dispatcher) by 2002:a05:600c:4e89:b0:493:f783:c46a with SMTP id 5b1f17b1804b1-497fd2fa920mr22738175e9.6.1785327221965; Wed, 29 Jul 2026 05:13:41 -0700 (PDT) Date: Wed, 29 Jul 2026 12:13:05 +0000 In-Reply-To: <20260729121306.1519473-2-sebastianene@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260729121306.1519473-2-sebastianene@google.com> X-Mailer: git-send-email 2.55.0.487.gaf234c4eb3-goog Message-ID: <20260729121306.1519473-7-sebastianene@google.com> Subject: [PATCH v8 5/7] KVM: arm64: Support FFA_NOTIFICATION_GET in host handler From: Sebastian Ene To: catalin.marinas@arm.com, maz@kernel.org, oupton@kernel.org, fuad.tabba@linux.dev, 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 verify the arguments sent from the host driver. Reviewed-by: Vincent Donnefort Signed-off-by: Sebastian Ene --- arch/arm64/kvm/hyp/nvhe/ffa.c | 25 ++++++++++++++++++++++++- 1 file changed, 24 insertions(+), 1 deletion(-) diff --git a/arch/arm64/kvm/hyp/nvhe/ffa.c b/arch/arm64/kvm/hyp/nvhe/ffa.c index 2bb16aa414f9..c22fe4514741 100644 --- a/arch/arm64/kvm/hyp/nvhe/ffa.c +++ b/arch/arm64/kvm/hyp/nvhe/ffa.c @@ -679,7 +679,6 @@ 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 */ @@ -938,6 +937,27 @@ 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 (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; @@ -1009,6 +1029,9 @@ 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)) -- 2.55.0.487.gaf234c4eb3-goog