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 1FEFA466B52 for ; Tue, 16 Jun 2026 15:42:12 +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=1781624534; cv=none; b=r+TOoMBWg/7MPHTWy9+2uA9vfDX5nDzUtpGO0dhMdonHBKBAYzhftRDx0Cv7iKMItkVAHILjxt2OpFdJYMnKLKQP18kokPQVc7t0HrbALm2m6VDSCrtP7siKOVhIUwf2eJPr2fYJatHHhx7qufICqxD666cJjPtPSTbSoQ773aY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781624534; c=relaxed/simple; bh=wwyBxT7BxvbWIoa11wxvc9tE42KGmuMi8OH5wpEcHg8=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=hf4aHLHqDRf9MUPZNw8LJoYaXweDlLMK0D7eCy/e0aPjY8KSW2fsCqWKoNFHHlPHKPF22qObdBNdE0YCMAuyD4w1MaeqN2xAbQ/vttaZbWYysvxVJYLLHVi/tpH7jHd425q1v+fRdBONHMXuBK38zFk+JdzzIef2swjyKo9FWE0= 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=RYEpvDrY; 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="RYEpvDrY" Received: by mail-wm1-f73.google.com with SMTP id 5b1f17b1804b1-490ace40f13so20563665e9.3 for ; Tue, 16 Jun 2026 08:42:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1781624531; x=1782229331; 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=edc7Ld3Q1CWSVNPfr5TXV9CytVBJ6mK62PgjuDOMsL0=; b=RYEpvDrY1i9A5RMkdQFrFtikNCkEBbhiKVe6GSPDUuoyM7s5+zaei5bd+AToRvK4rg zezFIr0c7t8doOvXa7Dm5Ju39AIfQCS9XLAzLkKtFB38RxS08LcTPS2Uek7KOCEaE/+m bqwTkjN22Bd2zqay7ycw7FDOj8mlcQ6A49asNu/xuvhvJgzpJJILRvDHGjvAhjTd77rp z7cM/YVXfrw6PuVk2G+8p/xP/UoUk/p+V6yBrQqZ3bvP7XSfxvemkflIHnAYQe3TUfyZ w6OY7n2X0U6aDUiwxIUBtBTi5Q8TR3aYhx1aI+dGptcZRWDcxSJNEFvdgd2HvfADTeXF VVVg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1781624531; x=1782229331; 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=edc7Ld3Q1CWSVNPfr5TXV9CytVBJ6mK62PgjuDOMsL0=; b=C/Qw5oCsWISd94DxEtisYwjAiW2GbR9yo/ezWQGvcEPXt09fWkHHrMtl2/JiTQUJ3G H1DV6iXD88Rt+3QdmXA/7AEWbNg74FQX1A+Q7K0iV0X5tcUnwSfNDsd/ds2mKURvDHXm iA0d18rZ7W8Fbb38+0Tf78EsxV7sNOuu3IyFQFHIwrxslHUndt8GHzEPFi5H63QmoMIa MX7bKZqF724ao07DnJupimWI9oMvqfN39hLRr/beEtZcmvTpiFzvkyCnyvlEZpnnaJ7L ctFq83Obd7VgAWxdit9o/Qdhr4GCXqPceKmKOEDJbavFEBGxdU2T6vBDuKAojGnNdfuU 6M7w== X-Forwarded-Encrypted: i=1; AFNElJ+dtjc4AdJm5BW3QNi1fZQrbsO9c3YkVrg7lxSC1Whj0UXYeYrkHi9uN3pCvjPh5h16hy/xVksjwvS0CNI=@vger.kernel.org X-Gm-Message-State: AOJu0YyspI1QKWYaDyB6XUZkYAWnYrykNK6NfqmuysLULNSTh8EUCZPn FnZO5ICD5CisWiuN+1L2a3pLUh6klO3UR5yeVSqmfv6xeMzC5WJLK7bQYx+asdwUQL5tc68LJc+ CIo+Gs3/q2TisfzGnQ6PT45oEyRY3/A== X-Received: from wmv21.prod.google.com ([2002:a05:600c:26d5:b0:48a:79a9:335c]) (user=sebastianene job=prod-delivery.src-stubby-dispatcher) by 2002:a05:600c:8a1b:20b0:48e:7854:1608 with SMTP id 5b1f17b1804b1-492333ecc7fmr75895e9.25.1781624531168; Tue, 16 Jun 2026 08:42:11 -0700 (PDT) Date: Tue, 16 Jun 2026 15:41:45 +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: <20260616154149.2763214-4-sebastianene@google.com> Subject: [PATCH v4 3/7] KVM: arm64: Support FFA_NOTIFICATION_BIND 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" Verify the arguments of the FF-A notification bind call and forward the message to Trustzone. Signed-off-by: Sebastian Ene --- arch/arm64/kvm/hyp/nvhe/ffa.c | 32 +++++++++++++++++++++++++++++++- 1 file changed, 31 insertions(+), 1 deletion(-) diff --git a/arch/arm64/kvm/hyp/nvhe/ffa.c b/arch/arm64/kvm/hyp/nvhe/ffa.c index a72f6d4b62f0..1f38ad008675 100644 --- a/arch/arm64/kvm/hyp/nvhe/ffa.c +++ b/arch/arm64/kvm/hyp/nvhe/ffa.c @@ -42,6 +42,8 @@ */ #define HOST_FFA_ID 0 +#define FFA_NOTIF_RECEIVER_ENDP_MASK GENMASK(15, 0) + /* * A buffer to hold the maximum descriptor size we can see from the host, * which is required when the SPMD returns a fragmented FFA_MEM_RETRIEVE_RESP @@ -713,7 +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_BIND: case FFA_NOTIFICATION_UNBIND: case FFA_NOTIFICATION_SET: case FFA_NOTIFICATION_GET: @@ -928,6 +929,32 @@ static void do_ffa_notif_bitmap(struct arm_smccc_1_2_regs *res, hyp_smccc_1_2_smc(args, res); } +static void do_ffa_notif_bind(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 (ffa_check_unused_args_sbz(ctxt, 5)) { + ffa_to_smccc_res(res, FFA_RET_INVALID_PARAMETERS); + return; + } + + 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 > 1) { + 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; @@ -990,6 +1017,9 @@ bool kvm_host_ffa_handler(struct kvm_cpu_context *host_ctxt, u32 func_id) case FFA_NOTIFICATION_BITMAP_DESTROY: do_ffa_notif_bitmap(&res, host_ctxt); goto out_handled; + case FFA_NOTIFICATION_BIND: + do_ffa_notif_bind(&res, host_ctxt); + goto out_handled; } if (ffa_call_supported(func_id)) -- 2.54.0.1136.gdb2ca164c4-goog