From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wm1-f74.google.com (mail-wm1-f74.google.com [209.85.128.74]) (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 1EE3B3D47C0 for ; Mon, 8 Jun 2026 16:55:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.74 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780937759; cv=none; b=H6eaW3Zs7Elb13B/NaPRqSBAZ5S55wM/po+S8uuQeEhkkWh21iDXUaJbEiFbZ97UpBzAfftsX5Zu3gPu8k37vDRD89pjbXx1FBzxQTB0XF+0iy6Z1f7niSRHXuh59/jtAotXZoz7PXLHxtY47RDrVok0HcE5wGptKDNzqr6Xb7w= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780937759; c=relaxed/simple; bh=ZSf1agfoztRze1vMk/U42ZW5zDEwC5EzHMFs8OfgvCA=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=tVyhT2hYJtmy8Ip3d45p39ihUxBo9DMxSXnx1vpj2ShOg+cFCIePNBkNF1x9JMNjFr4bjug3R6/RBkx+sMQJ4ltKd08Q5y5NyosEZ5sPr1kYUJ6kVhbQxdd+uRyRx/NSsQMDIdAYurQj7OBn3h/zL8oluMjDUoERxX2xBEJ3p7Y= 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=d8qatfPU; arc=none smtp.client-ip=209.85.128.74 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="d8qatfPU" Received: by mail-wm1-f74.google.com with SMTP id 5b1f17b1804b1-490b37e1f47so40638445e9.0 for ; Mon, 08 Jun 2026 09:55:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1780937756; x=1781542556; 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=SgnNHCiglWyE1dRfo9bMlmn2W0ut6mUT68P6HrXKuCQ=; b=d8qatfPUVbJem/v1JpTQZsuxuBd7fdvGnhVXG+KiFX8kE4EWcdauBpM/Vgs3QXNLNH Dhleu8Ze80WkB/RWFQgtw6FKQLNdQnkQdX/SkR4M41fqbbgT8D6F3VSdVfBEiOnpIJ6t vny0IBtsreKiT8Og/jB7IRJrywgS/jzNsAYdgt4+90sx31wEtNv1DRDY9Aq1BBOVoRJG TbxFFjzqzQYMAfgYpmymsaa8CJXBjuu3iiOjusdx5xD2BpI2DEUxSaHhsi4UewdoTPft tEMi44exBIF0/3/fMRDQfmFHlnJwiboXxvItAx3yomRM/F6VTxgY1J5hmmzHWhQIFRod hHqQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1780937756; x=1781542556; 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=SgnNHCiglWyE1dRfo9bMlmn2W0ut6mUT68P6HrXKuCQ=; b=OQK7uVtOnGoNvvPri2t2j4u/aQnA0Voqtqc5/lnFKosQ6C4dYpkilkDeA/m93Wc4cs 2sj8A4smYE/NgTBDShzRQGqqQIAzO3y88bpPY3Z5Z/8/zM19pykkv7AJrWznRm/IbvDV /tTtmcb8iIuSYq84butrUcEYMmkN85s/ALLl0WdCcvB0+/3c0HdjP49hSK5nAL5biZNq nyQM6AmUU5GxgDk4xiIT2pX+uyR1D34T5iBnK3bzA0vrI0xCHL/Y55oQpfIBsgOOBBYQ rTEvRDKsWIdEK4wVPikfasRrwkHddMyuUwsbaPZOjs/fl6Bak1enPolvhJ7QocUkLn7Q a8Bw== X-Forwarded-Encrypted: i=1; AFNElJ+aTsFcnO+6wsAVdNjmuvCw65BNaOZjDSAS0J9vG9XlErpU9kNPvFba/K4eUwJ/DV5FU+Opfi0cCUjpqps=@vger.kernel.org X-Gm-Message-State: AOJu0YyLz34SoljTyKj5zwDpnmYGasuF9jadwsFt4ZJ2amZn1OQdtdMW ZCodp8YIu8ejaJRD+pu2i2uE+Fvf5UjjI0lrF9TQr0m/wGz6f/oZrgoxMVX+1QXj4AUgtMFt6y4 P/uwAFwfB/w5Rj7Z1o+SFnoJJJ7LNZQ== X-Received: from wmxb10-n1.prod.google.com ([2002:a05:600d:844a:10b0:490:bb60:cdf4]) (user=sebastianene job=prod-delivery.src-stubby-dispatcher) by 2002:a05:600c:620f:b0:490:b2c9:e284 with SMTP id 5b1f17b1804b1-490c2612c43mr262310685e9.30.1780937756547; Mon, 08 Jun 2026 09:55:56 -0700 (PDT) Date: Mon, 8 Jun 2026 16:55:43 +0000 In-Reply-To: <20260608165549.1479409-1-sebastianene@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260608165549.1479409-1-sebastianene@google.com> X-Mailer: git-send-email 2.54.0.1064.gd145956f57-goog Message-ID: <20260608165549.1479409-2-sebastianene@google.com> Subject: [PATCH v2 1/7] KVM: arm64: Support FFA_NOTIFICATION_BITMAP_CREATE 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 bitmap creation messages to be forwarded to Trustzone from the host and introduce a helper to check for SBZ register fields. Signed-off-by: Sebastian Ene --- arch/arm64/kvm/hyp/nvhe/ffa.c | 36 ++++++++++++++++++++++++++++++++++- 1 file changed, 35 insertions(+), 1 deletion(-) diff --git a/arch/arm64/kvm/hyp/nvhe/ffa.c b/arch/arm64/kvm/hyp/nvhe/ffa.c index 1af722771178..c20d45191085 100644 --- a/arch/arm64/kvm/hyp/nvhe/ffa.c +++ b/arch/arm64/kvm/hyp/nvhe/ffa.c @@ -71,6 +71,18 @@ static u32 hyp_ffa_version; static bool has_version_negotiated; static hyp_spinlock_t version_lock; +static bool ffa_check_unused_args_sbz(struct kvm_cpu_context *ctxt, int first_reg) +{ + int reg; + + for (reg = first_reg; reg < 17; reg++) { + if (cpu_reg(ctxt, reg)) + return true; + } + + return false; +} + static void ffa_to_smccc_error(struct arm_smccc_1_2_regs *res, u64 ffa_errno) { *res = (struct arm_smccc_1_2_regs) { @@ -676,7 +688,6 @@ 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_BITMAP_CREATE: case FFA_NOTIFICATION_BITMAP_DESTROY: case FFA_NOTIFICATION_BIND: case FFA_NOTIFICATION_UNBIND: @@ -862,6 +873,26 @@ static void do_ffa_part_get(struct arm_smccc_1_2_regs *res, hyp_spin_unlock(&host_buffers.lock); } +static void do_ffa_notif_bitmap_create(struct arm_smccc_1_2_regs *res, + struct kvm_cpu_context *ctxt) +{ + DECLARE_REG(u32, vmid, ctxt, 1); + 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 (vmid != HOST_FFA_ID) { + 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; @@ -920,6 +951,9 @@ 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_NOTIFICATION_BITMAP_CREATE: + do_ffa_notif_bitmap_create(&res, host_ctxt); + goto out_handled; } if (ffa_call_supported(func_id)) -- 2.54.0.1064.gd145956f57-goog