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 855A147D475 for ; Wed, 29 Jul 2026 12:13:39 +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=1785327221; cv=none; b=Qd5tCnasULv0DHSV/67zmfJTfOJA5H8NNmk1tTq0KUPs8LYGw8r18GeQBxw+yqC3/0gP9YxUii2rwRY5+JjU7pt4fpXJ3hVgi+WQsyFv2ScvRy3SMTuxVyKjmfcw8xi+7Tnn93cJ4a2/JiCt9CbaMCAPK1v2eW7hSvKLm6h/Ul8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785327221; c=relaxed/simple; bh=Jkw47WRh/Cipe9xC+lqagrk1iJneUP0l20wKcgRJvZI=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=XqibWIxmv+PvHT/Hawp2X3TclPg76JFpKBbPOJSbT/n9TEaG2qeQi7bRtMdfB9vEs1aNqhXnNTB3IIFgbULk68WoHT+XFHANd0GeRdaaVsnFqluSZkIPSIVhA0ae2eD8xn4N2thtdDsElxVkrEWaHv1UCCWEB/xtSXyrTH0O76k= 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=NYL7b3iP; 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="NYL7b3iP" Received: by mail-wm1-f71.google.com with SMTP id 5b1f17b1804b1-496b408a5c0so4991975e9.0 for ; Wed, 29 Jul 2026 05:13:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1785327218; x=1785932018; 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=6ZPPlW5g4w1AsF53iFpKYDXkhl/izo/iIyII9m7u4XM=; b=NYL7b3iPkpFrJyf1vY+3sbhD7DBIPjoKF9zeSTSb/3GDB2r+M4WI1cxuUhN5N/s3DA UcGmymYUT+8OWLFOxedyEiPTDxuTXDVsUhT+U2wlA+4vthi6IkjjuxA0OAKMvnHFyk0j nkiaPohT0VpamLS1ZJ/DS9fTr76sSA35+Ere9Gqtk/VOXQ/Ja/2Crp7J5JH2ajEzuNes p+eKCs8nMeYf094MJjZFu4NmuYYinnwtFnKrYde0oZgXdUizgY9VVDDcGvuwb6YT98yX pO4ykBo2BatpsyJB8gLjpAims9SvjL5PHHNMrRxCARpyOwSiGcRn4SJBaa9cVMULozEh TsgA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1785327218; x=1785932018; 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=6ZPPlW5g4w1AsF53iFpKYDXkhl/izo/iIyII9m7u4XM=; b=r5ed7KOF4Y8TqtJDLBBe3GCCYKsCHZPu4lKxsYETBkDFamknyvNLSkFolPsfJsE/TE XtOXytOq2Sz037UJFuHhOaIc6GvUvqrdixrWBYy5An8b0Am8DWvXifcIt7MkAxFR4dbg o1wPM8+PoxueCi/DOlqSXRGg2siZO6n9kweCxEgKTUtLbnX5kvadljkhRL5RqCljkvnH t4en0MOXtmeQjWie6d9OXolijZ+i2s2NLJN0vM/vil91lBYAtw6q2PPqQLoEdeoAB1Ux LpU2WHK9dRqoU3coYqBBSoZMCZsrE64k4C2TdHP4eCevobLfDhd+vMz9lB5u0wRy3URt gOwg== X-Forwarded-Encrypted: i=1; AHgh+Rr4A8m/kYZ+sVCpk6L0CELGT/vQV90aXDIuVDK6i/7k2eiRCB6zk+ZCBi59czdXpkw3tsPsE+122hlU8lE=@vger.kernel.org X-Gm-Message-State: AOJu0Yxa64fdIGgMufJuQPjd51sWciYgWa8Yw4wXf7tYLgHuYaa3Zjhz re/zWIRNgrUMxjBBsjccD0zUlHTc+/+SmogFCRcE2pSUCHQVfKfNkyQ3rEJp/kwTayWr48oHnqC rqCQN7CPndL83dvYI0O6yj2y/0HzvtQ== X-Received: from wmoi21.prod.google.com ([2002:a05:600c:4815:b0:495:5890:8f69]) (user=sebastianene job=prod-delivery.src-stubby-dispatcher) by 2002:a05:600c:b85:b0:496:c0f6:78d6 with SMTP id 5b1f17b1804b1-496c653e5e2mr81145145e9.2.1785327217395; Wed, 29 Jul 2026 05:13:37 -0700 (PDT) Date: Wed, 29 Jul 2026 12:13:03 +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: <20260729121306.1519473-5-sebastianene@google.com> Subject: [PATCH v8 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 331d9d0d8287..d52d7c4d5e7f 100644 --- a/arch/arm64/kvm/hyp/nvhe/ffa.c +++ b/arch/arm64/kvm/hyp/nvhe/ffa.c @@ -678,7 +678,6 @@ 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: @@ -897,6 +896,27 @@ 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; @@ -962,6 +982,9 @@ 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)) -- 2.55.0.487.gaf234c4eb3-goog