From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ed1-f73.google.com (mail-ed1-f73.google.com [209.85.208.73]) (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 25ED33E5567 for ; Fri, 26 Jun 2026 07:46:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.208.73 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782459967; cv=none; b=EgP2/NjvNDPrNxu0tLBkyOFV9ohTJ03CVccjCyVYSQ3zAqwzXigPEIZhSfzhVsJ3ChGKNqlgLkdNV1cCQdswy6nnMSa0dC+dpEZn62bTJ+qPtaz38P9kLAsNHUiYvzDqv/iuO3si2LU5XVdFLBNz0Z8hRjIepXe+WPYXf9BtoTA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782459967; c=relaxed/simple; bh=A9iEB7RoLYR7o3b9JIWmxzrK9nW9JHyaFAr0Gs34LmA=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=unBYz3IE+8wP6g8K3JkpWgOCU2FIiMDaG2E95+xgabvBCHk/y0R5e0BGdAo+raS21K8QKmLHxCYfiCm0OVxiTBau002cLLUKkVuRsV6C0xg1OycAYlMvyDWE4AUUb9jVzBEyGAcB5ivz9KYeXwc+EhT9xqljysaLlUsdLPrxwOo= 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=DppuBNMN; arc=none smtp.client-ip=209.85.208.73 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="DppuBNMN" Received: by mail-ed1-f73.google.com with SMTP id 4fb4d7f45d1cf-695bbac451bso774100a12.1 for ; Fri, 26 Jun 2026 00:46:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1782459965; x=1783064765; darn=lists.linux.dev; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=mgEdqVZzkg8EdfvsvaTXXYI6aDMdt2t7UIchiBP7OMQ=; b=DppuBNMNc72sLj23LQbsf9zOmbR2czDFcjM1U8ERLcFOoTaczfep5U9ki3TNiKASXX /uFB654qKim+NKeoXcT8e3Prrn8xlJFydQWrqDsYx50ZGLXc0PoFMHk1ol/mDBWBxu2V TJJcBbNuzm/zhl93pXqRearXhYVcin6N5hAmE7E2+fVAVtMoyDJibwvHrb8XrcQ7Laiv 1snuKW906BRcUtb6rbwmrFwKgKHwn9BzOaXfydTles6310Y7ME4NNfwvrXKuD93b+eKa w3OTVcvZBLrDyiu3Y2VNx+jFaGm509KcotjQAJt/xD8QLF7i1pQ1x0KZQiosWaos2GGs nhgw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1782459965; x=1783064765; 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=mgEdqVZzkg8EdfvsvaTXXYI6aDMdt2t7UIchiBP7OMQ=; b=SxMkw1Va+JF/u7OBGmfIlFamEPy40qREzWxeOiN+d4Idp43QTpj5gZeOJLiVRossNO UTcuLRBcGJWjBYbZYg0gT5r/B6SoDYeRAJQRqG8JTdlBLLeHGrNhcRHuuXGyS906kQcu KEyM1X+dzZqqaCLpjzT6cuXkMhvkT3SJnMplpXkLTLTXgvjCn6pvKhy/+8WKLtYYjekw +qfu4X6QiufG8K2zh35Je3j1dHUPoRsIiV7dbGtzAejMy1ExMjkKYKiihORjX8M8lfqg df6r3xC7smWIqDDMWTdDtqadXtQzl2YFya7ojX/ljt7ZBxE5SDwYhb3Gv9RfNECw9zAH 5upg== X-Forwarded-Encrypted: i=1; AHgh+Rq+CBWceCMOrCdYroK5BZQpNaWVO/qufbN1b1j7OiTQnW2L4ixsPDvdZgVHOhO2LmZ/+og/Xfg=@lists.linux.dev X-Gm-Message-State: AOJu0YwGmdjlWOds1RU1HYUyQxZvXit1DUotx4izjmIm5OLaczmGTVYC HoIDvk+VMy3O1VQzpQy9SbCGOSMh2NfD+t4jig0phWMzDhsrAmlhPIX3KRZ5Ckm//NXxqRxIk9r OWPZJtof8IOu2opj2Yikvn8kI0yO5GA== X-Received: from ejeb22.prod.google.com ([2002:a17:906:1956:b0:bef:4b4a:fd4c]) (user=sebastianene job=prod-delivery.src-stubby-dispatcher) by 2002:a17:907:702:b0:c12:1651:17b2 with SMTP id a640c23a62f3a-c1216511edamr222936566b.9.1782459964269; Fri, 26 Jun 2026 00:46:04 -0700 (PDT) Date: Fri, 26 Jun 2026 07:45:42 +0000 In-Reply-To: <20260626074545.433234-1-sebastianene@google.com> Precedence: bulk X-Mailing-List: kvmarm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260626074545.433234-1-sebastianene@google.com> X-Mailer: git-send-email 2.55.0.rc0.799.gd6f94ed593-goog Message-ID: <20260626074545.433234-5-sebastianene@google.com> Subject: [PATCH v6 4/7] 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 verify the arguments. Signed-off-by: Sebastian Ene Reviewed-by: Vincent Donnefort --- arch/arm64/kvm/hyp/nvhe/ffa.c | 26 +++++++++++++++++++++++++- 1 file changed, 25 insertions(+), 1 deletion(-) diff --git a/arch/arm64/kvm/hyp/nvhe/ffa.c b/arch/arm64/kvm/hyp/nvhe/ffa.c index d52d7c4d5e7f..2bb16aa414f9 100644 --- a/arch/arm64/kvm/hyp/nvhe/ffa.c +++ b/arch/arm64/kvm/hyp/nvhe/ffa.c @@ -43,6 +43,7 @@ #define HOST_FFA_ID 0 #define FFA_NOTIF_RECEIVER_ENDP_MASK GENMASK(15, 0) +#define FFA_NOTIF_SENDER_ENDP_MASK GENMASK(31, 16) /* * A buffer to hold the maximum descriptor size we can see from the host, @@ -678,7 +679,6 @@ 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 */ @@ -917,6 +917,27 @@ static void do_ffa_notif_unbind(struct arm_smccc_1_2_regs *res, hyp_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 (flags & GENMASK(15, 2)) { + 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; @@ -985,6 +1006,9 @@ 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)) -- 2.55.0.rc0.799.gd6f94ed593-goog