From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id E227F46A608; Mon, 7 Sep 2026 10:00:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788775216; cv=none; b=oQ05wn4yBSS7P4IbrruVsMxUHxp3hDyueXQNyrfvcmbpUJSqpZ41KJ9fCvO57i2Hj8qihBv7UmfQstnEUA97R/fEnC8kEhkGTO0a1lzkHRzdckgroUEg2zP+zW06EvXRYHKMM9Hgz9T1MaxGrKjbcGiCWwE2S7X9eWR4PqRbavc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788775216; c=relaxed/simple; bh=3REQ5jWF12CkaqiVLtnquClwniilkFTh6i4V9X/W8Gs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=NSgfLDrPxR9LeECGIBhISVbLRBwCv+a6jf7juqlBqO9F9uTZ1ImwlgDKAwA4TK3HQqcBljFhN2W+v3KTdDEpkDw+TWq5pOD8CovISBvPZXx1t7aBTDDOyIT6gmz1WIA/VFN7PZsaW+1M+und84pq7paFAUkx3HdFLsRypM7ewKQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b=o0NNnupV; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b="o0NNnupV" Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 915ED1476; Mon, 7 Sep 2026 03:00:10 -0700 (PDT) Received: from ewhatever.cambridge.arm.com (ewhatever.cambridge.arm.com [10.2.197.99]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 805B03F7B4; Mon, 7 Sep 2026 03:00:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1788775214; bh=3REQ5jWF12CkaqiVLtnquClwniilkFTh6i4V9X/W8Gs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=o0NNnupVWVetQC/vx9RJ9UwpkUGwpzRnsMh/ZRIvgHt+mOk9nl819dKIE+ZvGQhUy BQply/fsvQkQWNz+OxKAzFYILQkAcFFFc62hn3afjNrGmhfiyPdqPrmw4a1knt1Oo8 +EeUQ0bCZdi67lxEO0ZhxGXTqxCelNU1w59Qv6Js= From: Suzuki K Poulose To: kvm@vger.kernel.org, kvmarm@lists.linux.dev Cc: maz@kernel.org, will@kernel.org, catalin.marinas@arm.com, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, steven.price@arm.com, aneesh.kumar@kernel.org, oupton@kernel.org, gshan@redhat.com, joey.gouly@arm.com, tabba@google.com, yuzenghui@huawei.com, linux-coco@lists.linux.dev, gankulkarni@os.amperecomputing.com, sdonthineni@nvidia.com, alpergun@google.com, fj0570is@fujitsu.com, WeiLin.Chang@arm.com, lpieralisi@kernel.org, enju.kohei@fujitsu.com, Suzuki K Poulose Subject: [PATCH v17 5/7] firmware: arm_rmm: Activate the RMM Date: Mon, 7 Sep 2026 10:59:39 +0100 Message-ID: <20260907095942.1140734-6-suzuki.poulose@arm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260907095942.1140734-1-suzuki.poulose@arm.com> References: <20260907095942.1140734-1-suzuki.poulose@arm.com> Precedence: bulk X-Mailing-List: linux-coco@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Steven Price Activate the RMM after the basic configuration. This is a memory transferring, stateful operation. Signed-off-by: Steven Price Signed-off-by: Suzuki K Poulose --- Changes since v16: * Split into a new patch --- drivers/firmware/arm_rmm/rmi.c | 17 +++++++++++++++-- include/linux/arm-rmi-cmds.h | 11 +++++++++++ 2 files changed, 26 insertions(+), 2 deletions(-) diff --git a/drivers/firmware/arm_rmm/rmi.c b/drivers/firmware/arm_rmm/rmi.c index 42c973c3a98bb..d969c8738efde 100644 --- a/drivers/firmware/arm_rmm/rmi.c +++ b/drivers/firmware/arm_rmm/rmi.c @@ -641,7 +641,8 @@ static int rmi_configure(void) static int __init arm64_init_rmi(void) { - int ret; + int ret = 0; + struct rmi_sro_state *sro = NULL; /* Continue without realm support if we can't agree on a version */ ret = rmi_check_version(); @@ -656,7 +657,19 @@ static int __init arm64_init_rmi(void) if (ret) return ret; - return 0; + /* Activate the RMM */ + sro = kmalloc_obj(*sro); + if (!sro) + return -ENOMEM; + + ret = rmi_rmm_activate(sro); + if (ret) { + pr_err("RMM activate failed\n"); + ret = ret < 0 ? ret : -ENXIO; + } + + kfree(sro); + return ret; } /* diff --git a/include/linux/arm-rmi-cmds.h b/include/linux/arm-rmi-cmds.h index fed0f3421895d..dea7c7004d35f 100644 --- a/include/linux/arm-rmi-cmds.h +++ b/include/linux/arm-rmi-cmds.h @@ -64,6 +64,17 @@ static inline int rmi_rmm_config_set(unsigned long cfg_ptr) return res.a0; } +/** + * rmi_rmm_activate() - Activate the RMM + * @sro: Preallocated SRO context to be used + * + * Return: 0 on success, positive RMI result code or negative Linux error code + */ +static inline long rmi_rmm_activate(struct rmi_sro_state *sro) +{ + return rmi_sro_memxfer_cmd(sro, GFP_KERNEL, SMC_RMI_RMM_ACTIVATE); +} + /** * rmi_features() - Read feature register * @index: Feature register index -- 2.43.0