From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ej1-f73.google.com (mail-ej1-f73.google.com [209.85.218.73]) (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 F0E9943C069 for ; Tue, 16 Jun 2026 10:54:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.218.73 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781607278; cv=none; b=U5GqPbAFLx8N+OE2NQZCaEnY1cdiQ4iUKeDY6h6OYRSAulLk6kPfr9/6eOhua2ALU9gfL57nckUDNDLkD6oIHnMmOzIyEKI/xlCwILu5oJKnuu0XVUwxwMisXYOxATnl08r8CxNgFBcTlp6ABMq0J5lPPTkjp42JzHl4WC7sH9o= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781607278; c=relaxed/simple; bh=pGIm6ajCFKdAmh02tN2y3M1/MFCCXAAzmaRbbmmWEa8=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=u/chjApniDq8HDcu5moQvDEKbpcUP+tCqBudPKhPNvkvfcm0DdfI1dkcHFPFvxp2Zq9zbEi0ckSPw6hyumPGcESnoy+Vfpj93QD9VZ0M+y/R8XirzfGa/3oBN+DIzB9qg+PCfAhAUnrWcBUH3kuzrvxshc3Wx4L6as/ff2I9AJE= 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=WC8S2Inv; arc=none smtp.client-ip=209.85.218.73 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="WC8S2Inv" Received: by mail-ej1-f73.google.com with SMTP id a640c23a62f3a-bee055582b7so338835366b.3 for ; Tue, 16 Jun 2026 03:54:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1781607273; x=1782212073; 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=2TDzPlo+obG7Khugzgn+eWzESFaACPnZFWLiw8gSSDQ=; b=WC8S2InvpZxMwe3KdN3tRGJFPA0uWLida93dkfy4m9DThlrLME12GX948tR+ABPF1p xCU4lOpozOFvyPMoEC/dS/504W6bRAkwXge0omrhm2R3kiHhwTUfhvGA/+hmySEfnDtT g6pz1jozVVAb6+unEdwVLYuoiifxQisafJJF/E4q8dbQqE+xUprj+W4pY/o2SIIQoWhr feGUShqbO06velIWqormpApu5U8EEMLsdGeWDvo/U3VEntPZWoF5ieWEtHkIwrkqtf9v g3fICdeJzvNeNLeve8NKauzfB88qXcwEQHB4MNI89UwIgPTiuLsi3Rn2UU5ZaT5Csrow 3dng== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1781607273; x=1782212073; 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=2TDzPlo+obG7Khugzgn+eWzESFaACPnZFWLiw8gSSDQ=; b=T+czQy50szRFiD5rSTPP3HMFY6uK/yWeqzTD9Jpc1bAPnnVP9b/8R8kKx2QHXNhJIm csvZyo5Lrf8tZ6dqRC7PzSpXmIt6x7gJ5b6fwLYGjiQDRS1l16IMg7i0qlbDRUefx4jv dwSdRt8LG8RxHWqfye0Ipre1k+Rz7Ng4UxzrLgWY+jYDrxK8O3946oyn8XE6lnqJmSsa iawXzcchH3HsQN5tjxMcYNaRV4bhMnS2hPpdoQUlQwcXDt5Tz51/dUtZmfEYnTEq6KeN QZ6mflFqvU83PIW+CAvr3zLsMGsMPrLlgC+DkkQnEoiq7SLJkq9p3nF5lsfFficPEYaV th1Q== X-Forwarded-Encrypted: i=1; AFNElJ/HhB5zCLAtQI0OanKPsOiIgB1GiMkZTnCW6SoUejZY1e/1G6joL+01vdUcgqr6OJpCnUivDjgzOBUcY7I=@vger.kernel.org X-Gm-Message-State: AOJu0YyLBsOAHXs6kCTzB+EOnOynkmTrEXltm/Uj2Stt8ixr8x4gTsWm d89vucWGgb6gtTuVizFbB+yI/c67GzjP23Y261ESBfA5QCVnYHw+/YW9a2vAr2EtH/0GLWW2q5D wo1x2rquBPuRq/uShqvd7EQziS4uNoA== X-Received: from ejcjl3.prod.google.com ([2002:a17:907:75c3:b0:c04:5e68:2b37]) (user=sebastianene job=prod-delivery.src-stubby-dispatcher) by 2002:a17:906:8a72:b0:c00:f408:c8b7 with SMTP id a640c23a62f3a-c043ee23d0emr122018466b.28.1781607272779; Tue, 16 Jun 2026 03:54:32 -0700 (PDT) Date: Tue, 16 Jun 2026 10:54:15 +0000 In-Reply-To: <20260616105417.2578670-1-sebastianene@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260616105417.2578670-1-sebastianene@google.com> X-Mailer: git-send-email 2.54.0.1136.gdb2ca164c4-goog Message-ID: <20260616105417.2578670-9-sebastianene@google.com> Subject: [PATCH v3 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 | 24 +++++++++++++++++++++++- 1 file changed, 23 insertions(+), 1 deletion(-) diff --git a/arch/arm64/kvm/hyp/nvhe/ffa.c b/arch/arm64/kvm/hyp/nvhe/ffa.c index fcfaa441770d..549250ff8f82 100644 --- a/arch/arm64/kvm/hyp/nvhe/ffa.c +++ b/arch/arm64/kvm/hyp/nvhe/ffa.c @@ -715,7 +715,6 @@ 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 +1000,26 @@ static void do_ffa_notif_set(struct arm_smccc_1_2_regs *res, arm_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, flags, ctxt, 2); + struct arm_smccc_1_2_regs *args; + + 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]; + 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; @@ -1072,6 +1091,9 @@ 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