From patchwork Sat Mar 9 15:57:27 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Tokarev X-Patchwork-Id: 1909997 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=patchwork.ozlabs.org) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4TsSRY0c2hz1yWx for ; Sun, 10 Mar 2024 03:00:09 +1100 (AEDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1riz5O-0007RS-Kn; Sat, 09 Mar 2024 10:58:10 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1riz5E-0007Lq-MV; Sat, 09 Mar 2024 10:58:01 -0500 Received: from isrv.corpit.ru ([86.62.121.231]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1riz5C-0004Iu-JR; Sat, 09 Mar 2024 10:58:00 -0500 Received: from tsrv.corpit.ru (tsrv.tls.msk.ru [192.168.177.2]) by isrv.corpit.ru (Postfix) with ESMTP id 8682F54531; Sat, 9 Mar 2024 18:58:38 +0300 (MSK) Received: from tls.msk.ru (mjt.wg.tls.msk.ru [192.168.177.130]) by tsrv.corpit.ru (Postfix) with SMTP id 08292944C3; Sat, 9 Mar 2024 18:57:41 +0300 (MSK) Received: (nullmailer pid 1694671 invoked by uid 1000); Sat, 09 Mar 2024 15:57:29 -0000 From: Michael Tokarev To: qemu-devel@nongnu.org Cc: Thomas Huth , qemu-trivial@nongnu.org, Michael Tokarev Subject: [PULL 09/11] hw/pci-bridge/cxl_upstream: Fix problem with g_steal_pointer() Date: Sat, 9 Mar 2024 18:57:27 +0300 Message-Id: <20240309155729.1694607-10-mjt@tls.msk.ru> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240309155729.1694607-1-mjt@tls.msk.ru> References: <20240309155729.1694607-1-mjt@tls.msk.ru> MIME-Version: 1.0 Received-SPF: pass client-ip=86.62.121.231; envelope-from=mjt@tls.msk.ru; helo=isrv.corpit.ru X-Spam_score_int: -68 X-Spam_score: -6.9 X-Spam_bar: ------ X-Spam_report: (-6.9 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_HI=-5, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org From: Thomas Huth When setting GLIB_VERSION_MAX_ALLOWED to GLIB_VERSION_2_58 or higher, glib adds type safety checks to the g_steal_pointer() macro. This triggers errors in the build_cdat_table() function which uses the g_steal_pointer() for type-casting from one pointer type to the other (which also looks quite weird since the local pointers have all been declared with g_autofree though they are never freed here). Let's fix it by using a proper typecast instead. For making this possible, we have to remove the QEMU_PACKED attribute from some structs since GCC otherwise complains that the source and destination pointer might have different alignment restrictions. Removing the QEMU_PACKED should be fine here since the structs are already naturally aligned. Anyway, add some QEMU_BUILD_BUG_ON() statements to make sure that we've got the right sizes (without padding in the structs). Signed-off-by: Thomas Huth Reviewed-by: Jonathan Cameron Reviewed-by: Michael Tokarev Signed-off-by: Michael Tokarev --- hw/pci-bridge/cxl_upstream.c | 8 ++++---- include/hw/cxl/cxl_cdat.h | 8 +++++--- 2 files changed, 9 insertions(+), 7 deletions(-) diff --git a/hw/pci-bridge/cxl_upstream.c b/hw/pci-bridge/cxl_upstream.c index e87eb40177..537f9affb8 100644 --- a/hw/pci-bridge/cxl_upstream.c +++ b/hw/pci-bridge/cxl_upstream.c @@ -192,8 +192,8 @@ enum { static int build_cdat_table(CDATSubHeader ***cdat_table, void *priv) { - g_autofree CDATSslbis *sslbis_latency = NULL; - g_autofree CDATSslbis *sslbis_bandwidth = NULL; + CDATSslbis *sslbis_latency; + CDATSslbis *sslbis_bandwidth; CXLUpstreamPort *us = CXL_USP(priv); PCIBus *bus = &PCI_BRIDGE(us)->sec_bus; int devfn, sslbis_size, i; @@ -270,8 +270,8 @@ static int build_cdat_table(CDATSubHeader ***cdat_table, void *priv) *cdat_table = g_new0(CDATSubHeader *, CXL_USP_CDAT_NUM_ENTRIES); /* Header always at start of structure */ - (*cdat_table)[CXL_USP_CDAT_SSLBIS_LAT] = g_steal_pointer(&sslbis_latency); - (*cdat_table)[CXL_USP_CDAT_SSLBIS_BW] = g_steal_pointer(&sslbis_bandwidth); + (*cdat_table)[CXL_USP_CDAT_SSLBIS_LAT] = (CDATSubHeader *)sslbis_latency; + (*cdat_table)[CXL_USP_CDAT_SSLBIS_BW] = (CDATSubHeader *)sslbis_bandwidth; return CXL_USP_CDAT_NUM_ENTRIES; } diff --git a/include/hw/cxl/cxl_cdat.h b/include/hw/cxl/cxl_cdat.h index 8e3d094608..b44cefaad6 100644 --- a/include/hw/cxl/cxl_cdat.h +++ b/include/hw/cxl/cxl_cdat.h @@ -130,7 +130,8 @@ typedef struct CDATSslbisHeader { uint8_t data_type; uint8_t reserved[3]; uint64_t entry_base_unit; -} QEMU_PACKED CDATSslbisHeader; +} CDATSslbisHeader; +QEMU_BUILD_BUG_ON(sizeof(CDATSslbisHeader) != 16); #define CDAT_PORT_ID_USP 0x100 /* Switch Scoped Latency and Bandwidth Entry - CDAT Table 10 */ @@ -139,12 +140,13 @@ typedef struct CDATSslbe { uint16_t port_y_id; uint16_t latency_bandwidth; uint16_t reserved; -} QEMU_PACKED CDATSslbe; +} CDATSslbe; +QEMU_BUILD_BUG_ON(sizeof(CDATSslbe) != 8); typedef struct CDATSslbis { CDATSslbisHeader sslbis_header; CDATSslbe sslbe[]; -} QEMU_PACKED CDATSslbis; +} CDATSslbis; typedef struct CDATEntry { void *base;