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 403AD3D47B7 for ; Mon, 8 Jun 2026 16:56:04 +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=1780937766; cv=none; b=JDPDhPckY/AiLrDMBxs4jv/Mq+w13IbZtnfBV+ncoY7gUavHf8KGeTy1OR+xZuKapQtOPvwsze9jD7ygiJAcPB5dyK1hXDtFJ0bRs7O6KNjRVIobQOAGB9+uonbJBSoeNmLCTpj8sn4kOVgAVenB3yG7BUjrcGp2XH9YIat4fk4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780937766; c=relaxed/simple; bh=WvNUZlQdSlrhUEvbk/wqJOmQ5kxvYTykZDwVGfpau8w=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=q/vJNdmGltts5G1B0QjKeI6UeuDlb2KrTQHJ2D6Y91Dhl6WfAicyekFF8oI/M7EKlcLKDtjxAoAcVm338HkjhPwDY6td6C+0CTxmeHlx3dqK72gyiXRe3RrVuG5dxJxguGvMfDmYAcnYQVuqtucP1HNZ8yDtHV5OhK62u+UgAb8= 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=tlqYTUzJ; 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="tlqYTUzJ" Received: by mail-wr1-f74.google.com with SMTP id ffacd0b85a97d-45efb6e60e4so4257173f8f.0 for ; Mon, 08 Jun 2026 09:56:04 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1780937762; x=1781542562; 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=fkWcCN/UbsW6dNVoLGt/rV/ZPDLec4SNUxgFyMxD3Hs=; b=tlqYTUzJgf9Eu6ej+YO6U7zA0Ba9S8dpqQf1bI8yTxxLXFytg4RYyBmN4vmG1DjMTm /ys1xB2wEPEW7a/UxH7/+oSqmsTJrt9dpsLHd2wzfmKO04jF7dq/HuWknWwIvsEi6pyh rCvzzq2Z57NhBsb7H4jkAPIqa5DIuY6inheNHENtd2Rb+dlVoIWtory6flXZgqrRC7o3 zdAYJZGgljAy7m96c5RiHdDsTuTp0/lN0NPYyzkoURXhXwP/oj1qxqMvFYSqiy/vO2WO Xifq544LVJqNaakzTPTlNcYacOoNRwy8t1669N2Bi6icV+whILrVTVRuZOmU6GbHUm19 vmYQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1780937762; x=1781542562; 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=fkWcCN/UbsW6dNVoLGt/rV/ZPDLec4SNUxgFyMxD3Hs=; b=pG6+ncvzlmILkBNEawqkW4xWnFwEpZZ7K79xHMxJ7tPgezsWnTYzV56j4Eyo4eoX5Z nBchSoc9hgAwGKxH4b85Jwd5BjX9rq3GBwmNRsVdaaEoGJ8XtICSBd8FNoqc4GiAL3+h O53IeAbq9EPt/aoYNl2cy1+ZH0J7w7kXza9/Gwj9YFZdGYtDIabvf6U32ep+37+QIOLE uR9wDvS+HjG5YNj9e7Sl5w4yIxg0+Pp6pf0Oq4wpcalzU6XSV7DjCjCBko7WBFzhQ3dR LDJa2DGZx6W/66dmnefINMBCexJh3T4ghyxSQgzjEu0gfM/zW1BKH9Qrry3UJ2tCZyoU pUrg== X-Forwarded-Encrypted: i=1; AFNElJ+bJdk43K8i06nyo8JXzQT+4nctfxT/MeAsap46y7Y5aX254uCJnsDjhrn8PXyRZKo3F7iYvwj62NY3H2s=@vger.kernel.org X-Gm-Message-State: AOJu0YzUAvudDwa9TAX0W4PSAXE5NMA/ND6MBMsXHS7uxtqVFp1IzoJF llv1TPqMf7FzbSBbpPVpFnN3UiR0I8heXJbl4ICiel6Ilo+ry/YYlPsxf65eFuJX3c7BpOVz5lF IERGURMu6YMWZ3UAasyeLUAEe3GIpzg== X-Received: from wroz2.prod.google.com ([2002:adf:f1c2:0:b0:45e:8fa3:14f7]) (user=sebastianene job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6000:4697:b0:45e:739b:3e43 with SMTP id ffacd0b85a97d-46030186d90mr16953340f8f.0.1780937762410; Mon, 08 Jun 2026 09:56:02 -0700 (PDT) Date: Mon, 8 Jun 2026 16:55:48 +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: <20260608165549.1479409-7-sebastianene@google.com> Subject: [PATCH v2 6/7] KVM: arm64: Support FFA_NOTIFICATION_GET 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 GET messages to be proxied from the pKVM hypervisor to Trustzone and enforce MBZ/SBZ fields. Signed-off-by: Sebastian Ene --- arch/arm64/kvm/hyp/nvhe/ffa.c | 24 +++++++++++++++++++++++- 1 file changed, 23 insertions(+), 1 deletion(-) diff --git a/arch/arm64/kvm/hyp/nvhe/ffa.c b/arch/arm64/kvm/hyp/nvhe/ffa.c index 3270381679b4..28b6cb0e14c4 100644 --- a/arch/arm64/kvm/hyp/nvhe/ffa.c +++ b/arch/arm64/kvm/hyp/nvhe/ffa.c @@ -690,7 +690,6 @@ 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_GET: case FFA_NOTIFICATION_INFO_GET: /* Optional interfaces added in FF-A 1.2 */ case FFA_MSG_SEND_DIRECT_REQ2: /* Optional per 7.5.1 */ @@ -984,6 +983,26 @@ static void do_ffa_notif_set(struct arm_smccc_1_2_regs *res, arm_smccc_1_2_smc(args, res); } +static void do_ffa_notif_get(struct arm_smccc_1_2_regs *res, + struct kvm_cpu_context *ctxt) +{ + DECLARE_REG(u32, flags, ctxt, 2); + 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 (flags & GENMASK(31, 4)) { + 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; @@ -1057,6 +1076,9 @@ bool kvm_host_ffa_handler(struct kvm_cpu_context *host_ctxt, u32 func_id) case FFA_NOTIFICATION_SET: do_ffa_notif_set(&res, host_ctxt); goto out_handled; + case FFA_NOTIFICATION_GET: + do_ffa_notif_get(&res, host_ctxt); + goto out_handled; } if (ffa_call_supported(func_id)) -- 2.54.0.1064.gd145956f57-goog