From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wm1-f69.google.com (mail-wm1-f69.google.com [209.85.128.69]) (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 9657851FCCE for ; Mon, 7 Sep 2026 17:19:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.69 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788801584; cv=none; b=WhQTVqQ0I3vH8UhFZ7BCCVi7nw3nZ5mV9UeqU1AyFaPkebxErTlubEjHOA080O4wOqVCKgjotUBtPDZi55MAjR0sevXWyGtqbkOB7Qs3/PwGouUzzyHdF//qWzjmFwTaxHkqBJtTtCrPgqT6PWwW53dCSzk8vG4OUHOjC9vT4jk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788801584; c=relaxed/simple; bh=AWCUXF43ysfgI41lpMKTvK41BHIZRzQWcWHwmf2PRAA=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=ubEcsARS0i2cjHaZ6MjCSjBofcmZQ/jR4mD84lRe3pZCgUVQ0yoBWMl2Xc/DxneOdUI0dktGpOS0o3xSEq7Ot4lJxBo9THoQzV74hMEc64BvmXanYVSsM5LuV2u4ucuVGSnpn7cj7PW9aNFo3ozSUA/Bo3+FAAqOldRjh600DHQ= 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=IxixeWnB; arc=none smtp.client-ip=209.85.128.69 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="IxixeWnB" Received: by mail-wm1-f69.google.com with SMTP id 5b1f17b1804b1-4994aebe932so48238135e9.3 for ; Mon, 07 Sep 2026 10:19:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1788801581; x=1789406381; darn=lists.linux.dev; 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=pNLhfgvrYwznedAczU/yoh7OJ0T71JIKxZfqgfryA8Y=; b=IxixeWnBKPIlrOcR/qKWk2uwiqLFduSilKJ+6TFLdBCimOvV3BzWDHeJ7Hu7oqgo3X hlzhRvK/K5NrhUz9t6afHfOyKxr2haMNNwoCfKQlQwxXT4lFp/WFpqmX27FeJKW7CISG XOcmncX3v6dgNbIY9qz+f0XXnpR6yZi36MyU/ZQrCMnv/sWN4dqXRxlduykOmTnBD2iW 9lKob69rmIfxFE5GBnKQbUBzV0KVS9bdrLqrgN0uu/Fxvc8hBFRz/qx8GKNB7VWpMjqo nQuZFTobHAs4ASNmi6aJA+lZD+LSTYMJmSG2aJ7hTraLUMp4PpQg9lKxmrClFHfm1gDZ i8KA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1788801581; x=1789406381; 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=pNLhfgvrYwznedAczU/yoh7OJ0T71JIKxZfqgfryA8Y=; b=LXhQugTKbTGNGr1mHktsrRx/1MyDDcSHg4gzl84aymxkkX5m8xUvmxYnfcq9Vy53v2 WmUb3MD3sIcMgdQH2sPyHiCKEVwUIWYIgteVvsToZMCqBi2hCzbnPVLGiKK+IoDyBOIQ tU7OflDLqRdNJgbxDraRh7I54Y2003/yrs7Eej3m3G1ftbcMtmSWVvAEz8iz8E/KQfwn 9f84NojqPCkoEXS4aHSc733EOsCgvfmkQEbImz0TROMMqu2x2v4yd+r9iOpsHmE16mnK x642f63bADie/y+q0GXnIKzA5pBRszqzGgnE/UwfUbBJ3+ReAtreA9N3fVsfHzfMmAK9 4qkg== X-Forwarded-Encrypted: i=1; AKwUvBx9hfOTEFypFUCoI88r0EsPOw1LENzSoTrU2OBcsl6ne3AmjSUR75jTUMGFWZa7GyLhy6L+R7E=@lists.linux.dev X-Gm-Message-State: AFuF++msNdGbiKHSDdOovocSp8XEqt1vTQ+4yMCdH9GlX2rZM9+4uDJs DWIwkvr+ArCaUISRwc+X5iOCtE2UPuVkj0tLFGjOB5MeYKGOzhpbL+9eevcN84wUplvJ7E+zUm5 WLd1BqiuMjrKx6qfhmS2jFUmLycUtvQ== X-Received: from wmco24.prod.google.com ([2002:a05:600c:a318:b0:49c:caed:426c]) (user=sebastianene job=prod-delivery.src-stubby-dispatcher) by 2002:a05:600c:6306:b0:49c:f5c0:aa76 with SMTP id 5b1f17b1804b1-49cf81e366amr589515835e9.5.1788801580595; Mon, 07 Sep 2026 10:19:40 -0700 (PDT) Date: Mon, 7 Sep 2026 17:19:25 +0000 In-Reply-To: <20260907171930.4037166-1-sebastianene@google.com> Precedence: bulk X-Mailing-List: kvmarm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260907171930.4037166-1-sebastianene@google.com> X-Mailer: git-send-email 2.55.0.979.g7e5102b832-goog Message-ID: <20260907171930.4037166-4-sebastianene@google.com> Subject: [PATCH v9 3/7] KVM: arm64: Support FFA_NOTIFICATION_UNBIND 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" Verify the arguments of the FF-A notification unbind call and forward the message to Trustzone. 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 89872e12f9d4..a1ba4463d1ef 100644 --- a/arch/arm64/kvm/hyp/nvhe/ffa.c +++ b/arch/arm64/kvm/hyp/nvhe/ffa.c @@ -694,7 +694,6 @@ 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_UNBIND: case FFA_NOTIFICATION_SET: case FFA_NOTIFICATION_GET: case FFA_NOTIFICATION_INFO_GET: @@ -913,6 +912,27 @@ static void do_ffa_notif_bind(struct arm_smccc_1_2_regs *res, hyp_smccc_1_2_smc(args, res); } +static void do_ffa_notif_unbind(struct arm_smccc_1_2_regs *res, + struct kvm_cpu_context *ctxt) +{ + DECLARE_REG(u32, endp_id, ctxt, 1); + DECLARE_REG(u32, reserved, ctxt, 2); + struct arm_smccc_1_2_regs *args; + + if (reserved) { + 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; + } + + 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 = {0}; @@ -978,6 +998,9 @@ bool kvm_host_ffa_handler(struct kvm_cpu_context *host_ctxt, u32 func_id) case FFA_NOTIFICATION_BIND: do_ffa_notif_bind(&res, host_ctxt); goto out_handled; + case FFA_NOTIFICATION_UNBIND: + do_ffa_notif_unbind(&res, host_ctxt); + goto out_handled; } if (ffa_call_supported(func_id)) -- 2.55.0.979.g7e5102b832-goog