From patchwork Wed Feb 2 14:10:24 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jonathan Cameron X-Patchwork-Id: 12733062 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 78662C433EF for ; Wed, 2 Feb 2022 14:26:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233378AbiBBO0A (ORCPT ); Wed, 2 Feb 2022 09:26:00 -0500 Received: from frasgout.his.huawei.com ([185.176.79.56]:4647 "EHLO frasgout.his.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231667AbiBBOZ7 (ORCPT ); Wed, 2 Feb 2022 09:25:59 -0500 Received: from fraeml711-chm.china.huawei.com (unknown [172.18.147.201]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4JpkX16G20z67Cqn; Wed, 2 Feb 2022 22:22:09 +0800 (CST) Received: from lhreml710-chm.china.huawei.com (10.201.108.61) by fraeml711-chm.china.huawei.com (10.206.15.60) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.21; Wed, 2 Feb 2022 15:25:57 +0100 Received: from SecurePC-101-06.china.huawei.com (10.122.247.231) by lhreml710-chm.china.huawei.com (10.201.108.61) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.21; Wed, 2 Feb 2022 14:25:56 +0000 From: Jonathan Cameron To: , =?utf-8?q?Alex_Benn=C3=A9e?= , Marcel Apfelbaum , "Michael S . Tsirkin" , Igor Mammedov CC: , Ben Widawsky , "Peter Maydell" , , "Shameerali Kolothum Thodi" , =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , Saransh Gupta1 , Shreyas Shah , Chris Browy , Samarth Saxena , "Dan Williams" Subject: [PATCH v5 30/43] acpi/cxl: Introduce CFMWS structures in CEDT Date: Wed, 2 Feb 2022 14:10:24 +0000 Message-ID: <20220202141037.17352-31-Jonathan.Cameron@huawei.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20220202141037.17352-1-Jonathan.Cameron@huawei.com> References: <20220202141037.17352-1-Jonathan.Cameron@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.122.247.231] X-ClientProxiedBy: lhreml743-chm.china.huawei.com (10.201.108.193) To lhreml710-chm.china.huawei.com (10.201.108.61) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-cxl@vger.kernel.org From: Ben Widawsky The CEDT CXL Fixed Window Memory Window Structures (CFMWs) define regions of the host phyiscal address map which (via an impdef means) are configured such that they have a particular interleave setup across one or more CXL Host Bridges. Reported-by: Alison Schofield Signed-off-by: Ben Widawsky Signed-off-by: Jonathan Cameron --- hw/acpi/cxl.c | 59 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 59 insertions(+) diff --git a/hw/acpi/cxl.c b/hw/acpi/cxl.c index 442f836a3e..50efc7f690 100644 --- a/hw/acpi/cxl.c +++ b/hw/acpi/cxl.c @@ -60,6 +60,64 @@ static void cedt_build_chbs(GArray *table_data, PXBDev *cxl) build_append_int_noprefix(table_data, memory_region_size(mr), 8); } +/* + * CFMWS entries in CXL 2.0 ECN: CEDT CFMWS & QTG _DSM. + * Interleave ways encoding in CXL 2.0 ECN: 3, 6, 12 and 16-way memory + * interleaving. + */ +static void cedt_build_cfmws(GArray *table_data, MachineState *ms) +{ + CXLState *cxls = ms->cxl_devices_state; + GList *it; + + for (it = cxls->fixed_windows; it; it = it->next) { + CXLFixedWindow *fw = it->data; + int i; + + /* Type */ + build_append_int_noprefix(table_data, 1, 1); + + /* Reserved */ + build_append_int_noprefix(table_data, 0, 1); + + /* Record Length */ + build_append_int_noprefix(table_data, 36 + 4 * fw->num_targets, 2); + + /* Reserved */ + build_append_int_noprefix(table_data, 0, 4); + + /* Base HPA */ + build_append_int_noprefix(table_data, fw->mr.addr, 8); + + /* Window Size */ + build_append_int_noprefix(table_data, fw->size, 8); + + /* Host Bridge Interleave Ways */ + build_append_int_noprefix(table_data, fw->enc_int_ways, 1); + + /* Host Bridge Interleave Arithmetic */ + build_append_int_noprefix(table_data, 0, 1); + + /* Reserved */ + build_append_int_noprefix(table_data, 0, 2); + + /* Host Bridge Interleave Granularity */ + build_append_int_noprefix(table_data, fw->enc_int_gran, 4); + + /* Window Restrictions */ + build_append_int_noprefix(table_data, 0x0f, 2); /* No restrictions */ + + /* QTG ID */ + build_append_int_noprefix(table_data, 0, 2); + + /* Host Bridge List (list of UIDs - currently bus_nr) */ + for (i = 0; i < fw->num_targets; i++) { + g_assert(fw->target_hbs[i]); + build_append_int_noprefix(table_data, fw->target_hbs[i]->bus_nr, 4); + } + } +} + static int cxl_foreach_pxb_hb(Object *obj, void *opaque) { Aml *cedt = opaque; @@ -86,6 +144,7 @@ void cxl_build_cedt(MachineState *ms, GArray *table_offsets, GArray *table_data, /* reserve space for CEDT header */ object_child_foreach_recursive(object_get_root(), cxl_foreach_pxb_hb, cedt); + cedt_build_cfmws(cedt->buf, ms); /* copy AML table into ACPI tables blob and patch header there */ g_array_append_vals(table_data, cedt->buf->data, cedt->buf->len);