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 64B22439009 for ; Tue, 16 Jun 2026 10:54:33 +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=1781607278; cv=none; b=CD4zKmnw8COBT3gwDEHJi97faiCeUGtjJdVfQceX6d5i9+5Am9LCemo+a4iEA61SNOuYQu1aMkmrlDUi4I5IqJ94WXXViL2602NFczEO28dWHxz/DB4S41jyvbKjRehjM517/xAJ5GnWkbIet2FtQfhA8k+C6oLaQX95eWZTfbE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781607278; c=relaxed/simple; bh=Agm+Ctlat4H+3Nw+TepLaz7IWysNnstjoNGy/xNkUgc=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=mZVCErF5GUFsR4aNhBVKzKLfd4LkLOYwcwdh/dFoelfFmRNqxrVhcuEvIqhadjlZkrqsVOC4/tW6GDSbl3g/Z8bpT2kUo3A3xnZwpW1PMJdIbtEPLuHSoNAlJW5sbdl7n5Esk4WNXBzWVTF+NQe5tmuIz8cOdcOSu7gE00BXxnI= 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=aUekd8Br; 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="aUekd8Br" Received: by mail-wm1-f74.google.com with SMTP id 5b1f17b1804b1-490bae3a39bso43565785e9.1 for ; Tue, 16 Jun 2026 03:54:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1781607272; x=1782212072; 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=rOHLtsQ7Dkg79lD0jO5Fo0V8aU+vyRvk3bi+qkulMVA=; b=aUekd8Brov4aJBmNZ7lW5rXwY3naNP72eghZgddaWZFFCyooRt7rpFhTLtoaUjvT5z bHey9c5L7OXxXhgN+PZ9zlSdujgmTnaBW0rTldxggp6rxrMIt2TSM26z6mjkgAgs4uRc FRBCFaAws8nSDMgW9LpsMqW/EAP+dGr45iI8Zj7ETty113u4G6ozax3W1+VBDgYZ+hmT V/mPLB9mcsjd/sXCa/pc6Cv0MKxXtuvQbzF1rOQoSJifeqygE+WT9mLRiim8OZftBYGI DUP1rYwlQbExpTs5QTI82yJaqfWVaIh4RzjHrLpuyza0ofC/T5E6rkQwO5zhdpTiiSKR ioxw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1781607272; x=1782212072; 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=rOHLtsQ7Dkg79lD0jO5Fo0V8aU+vyRvk3bi+qkulMVA=; b=BnvmFIhqJEWCXOD4+xjHUF1E4shXvcstqf9R8QLtSIN/3d5XttS6IS3lxAaShWyNv9 qoVkkP/8vkcnrow31QiM9DR3WPXj2hqaIbnewOb/PSP1sn/GXwHqPcrzOW8DrQabKq+A UXSkWie4JZ9cjjBhLYfYAL6UGvXG4cLSO8S5ELWX7HxJPi0rDLjvRABq2lv6IGQRwn5B jJiIR/oFEmdGVVSwE+SI4hrARYdbSRxr19vG3xB7hJlEPkryETBzIe2s8P8lEkvO1MAC 9fxY6L9db1Xmf7x06/t6AiUiTg1TGFMCCw6ozE2RcunYTl+ERDltmrQ1OnkTlJ+3BZNr F1CA== X-Forwarded-Encrypted: i=1; AFNElJ/7CtVWn17oueUs7Zlat7samFY3ZU6wBtoWOFNx/kCS7ozsnHtN70vobi9Un1rmVUDMrkKHiUiISWu/uOc=@vger.kernel.org X-Gm-Message-State: AOJu0YzjFg46Vm8YBRseR5s6DGs8Jo4/W/N8sJNwL3JQ4LdrrPKZYxOL eBGRl67GYrBlCaDDJUUtEKEeDV8uW0pDkhTGdtPFjFBaPWi3RXiX4gWIAcdKDEHqM3gcbjeN4Ik 0fCZrgT/vEpPa6BIt/p9TCRM/zPJefw== X-Received: from wmjq15.prod.google.com ([2002:a7b:ce8f:0:b0:490:7e29:9cea]) (user=sebastianene job=prod-delivery.src-stubby-dispatcher) by 2002:a05:600c:1d08:b0:492:2e93:1199 with SMTP id 5b1f17b1804b1-4922e9311a5mr65735675e9.15.1781607271681; Tue, 16 Jun 2026 03:54:31 -0700 (PDT) Date: Tue, 16 Jun 2026 10:54:14 +0000 In-Reply-To: <20260616105417.2578670-1-sebastianene@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260616105417.2578670-1-sebastianene@google.com> X-Mailer: git-send-email 2.54.0.1136.gdb2ca164c4-goog Message-ID: <20260616105417.2578670-8-sebastianene@google.com> Subject: [PATCH v3 5/7] KVM: arm64: Support FFA_NOTIFICATION_SET 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 SET 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 | 30 +++++++++++++++++++++++++++++- 1 file changed, 29 insertions(+), 1 deletion(-) diff --git a/arch/arm64/kvm/hyp/nvhe/ffa.c b/arch/arm64/kvm/hyp/nvhe/ffa.c index 9ec9bc9a8622..fcfaa441770d 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_SET: case FFA_NOTIFICATION_GET: case FFA_NOTIFICATION_INFO_GET: /* Optional interfaces added in FF-A 1.2 */ @@ -976,6 +975,32 @@ static void do_ffa_notif_unbind(struct arm_smccc_1_2_regs *res, arm_smccc_1_2_smc(args, res); } +static void do_ffa_notif_set(struct arm_smccc_1_2_regs *res, + struct kvm_cpu_context *ctxt) +{ + DECLARE_REG(u32, endp_id, ctxt, 1); + DECLARE_REG(u32, flags, ctxt, 2); + struct arm_smccc_1_2_regs *args; + + if (FIELD_GET(FFA_NOTIF_SENDER_ENDP_MASK, endp_id) != HOST_FFA_ID) { + ffa_to_smccc_res(res, FFA_RET_INVALID_PARAMETERS); + return; + } + + if (ffa_check_unused_args_sbz(ctxt, 5)) { + ffa_to_smccc_res(res, FFA_RET_INVALID_PARAMETERS); + return; + } + + if (flags & GENMASK(15, 2)) { + 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; @@ -1044,6 +1069,9 @@ bool kvm_host_ffa_handler(struct kvm_cpu_context *host_ctxt, u32 func_id) case FFA_NOTIFICATION_UNBIND: do_ffa_notif_unbind(&res, host_ctxt); goto out_handled; + case FFA_NOTIFICATION_SET: + do_ffa_notif_set(&res, host_ctxt); + goto out_handled; } if (ffa_call_supported(func_id)) -- 2.54.0.1136.gdb2ca164c4-goog