From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wr1-f74.google.com (mail-wr1-f74.google.com [209.85.221.74]) (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 1128244E02C for ; Tue, 16 Jun 2026 15:42:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.221.74 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781624537; cv=none; b=dquO4p+z+ZPTMI+idCU5QNMaaSr+FnvtHUQfPqAHTP3x/y4EJKpyMpmowENPtXMh0zu6fh5JU9dt8alTQ7jaIIuLPd8qevolITPSSHgNp6enjiS29pJoc/RDUSaSD86zWqh5DSWi0NmMqY3l1F5cd1qR1a/Faq7xq3bc9fcyNRM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781624537; c=relaxed/simple; bh=zptgevR25CiCiySQHvfLxICZuFBXFFtymGqkQC9bt6w=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=GlluWrXmHFam5lQadk8MmL9lqko3VPhp6TgzOxfVq9hnVxdGw8T766v8/EIGfwWdBcNm0CxcvePyTK0tdkjxna0Wdp/nnLl1RF03RB/QmJnrcnAcwMb3MzY8UgHnl63jXWc/BEbzcJtYF+t0tjvjoVEDJOvGxOYQFW26NTQk4Pc= 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=emxIK7f5; arc=none smtp.client-ip=209.85.221.74 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="emxIK7f5" Received: by mail-wr1-f74.google.com with SMTP id ffacd0b85a97d-461a15b716fso476324f8f.2 for ; Tue, 16 Jun 2026 08:42:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1781624534; x=1782229334; 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=wKil37HAzALzonWw/7fqaOm1BrpCO8SF3FKst/evun4=; b=emxIK7f5TgZYeuHXSItwOQYE51VoihMeRB7WYduaGv0g2a0wwdZkCyDGeXHZ98orFK QFbBCsrD1d+/TERE8CHlx2PhS7ugvdnezaiyB3ttlzep+Oi4KLya3vGwvTr11sZquO0+ bQiDgz5jIiQApjOVhzwfbVtSiRKYPCyu8LPz2sm3aCCN1LUdR8eIgNUn/3v4yB6F7H0B IbNqvFcOtQ+Nzz8vTMILhaex3hfw6lKRb+e6zdoxJp2obLOJcd7V3WsEuoeyjsMLx+ne +qXyGNxCklr9NiT7YiuNrLJycQMUkXO5lUgJ3zZmH9KtXsFlDy06xXzTH0D6L33jkVo0 mxvw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1781624534; x=1782229334; 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=wKil37HAzALzonWw/7fqaOm1BrpCO8SF3FKst/evun4=; b=BnDENA/R45lF/x4KmHJaRjdk+Ca3B8A88KqW+r/nHEi61QQ/n0RiJHTMiquXYSx/Qi D4FB4h4nI7reaxb4KL7C3Z/O40E64tThX2FIiE7IourdgVOFLM8HstoOUGMH9P0VHT04 TPmywt+4ZE/o2W7B0nPLMiYENSQHO4dXRfo2I6ehftK3U4vUeFRwX7SCJ0IJqeIsiwDw KwdXv8cXwzxlU+/T6iExHqex5Hj6dASE10UGIBy7AdufWAqGRlcdD9SnEWC1vnrnaDNN Hi4bsiQRvSYP/MGXZWVI5TBGl6iWdz/BEA1yFKBguKQJWuuxfzQviijpiBKVOaQVTp1T P9JQ== X-Forwarded-Encrypted: i=1; AFNElJ9rXdLxT82h3XtIPGjLN4ECYByKxSc8Z/dUBLete5lOuJ2JrIaYrt6K5BTWKjWlszRbyW4l2zGYhUoxBa0=@vger.kernel.org X-Gm-Message-State: AOJu0YyRB/YdzRZLo2Eq8E6VKEY5O9fImgCs0FQKhf9ulW44YBVAj+V8 JfGxB8YLPmSN/IUphf3SjbeuNA0JWRS7m91qEdHfVN5g2w9/o41LyzjZbFRTRfLY3uYikx6ZsGS LUj9r2disag2RXBeo987G6jyaYNOltg== 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:c0c8:b0:490:b446:fb8 with SMTP id 5b1f17b1804b1-492333af102mr792995e9.11.1781624534173; Tue, 16 Jun 2026 08:42:14 -0700 (PDT) Date: Tue, 16 Jun 2026 15:41:46 +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: <20260616154149.2763214-5-sebastianene@google.com> Subject: [PATCH v4 4/7] KVM: arm64: Support FFA_NOTIFICATION_UNBIND 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 unbind call and forward the message to Trustzone. 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 1f38ad008675..adf8680f3266 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_UNBIND: case FFA_NOTIFICATION_SET: case FFA_NOTIFICATION_GET: case FFA_NOTIFICATION_INFO_GET: @@ -955,6 +954,27 @@ 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 (ffa_check_unused_args_sbz(ctxt, 5) || 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; @@ -1020,6 +1040,9 @@ 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)) -- 2.54.0.1136.gdb2ca164c4-goog