From patchwork Thu Jun 20 14:37:31 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kirti Wankhede X-Patchwork-Id: 11006895 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 15E56112C for ; Thu, 20 Jun 2019 14:58:01 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0405920502 for ; Thu, 20 Jun 2019 14:58:01 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id EB67722701; Thu, 20 Jun 2019 14:58:00 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.0 required=2.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 6AD7D20502 for ; Thu, 20 Jun 2019 14:58:00 +0000 (UTC) Received: from localhost ([::1]:48800 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hdyVj-0006qY-Cm for patchwork-qemu-devel@patchwork.kernel.org; Thu, 20 Jun 2019 10:57:59 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:37813) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hdyJm-0005ps-8G for qemu-devel@nongnu.org; Thu, 20 Jun 2019 10:45:39 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hdyJk-0005K6-My for qemu-devel@nongnu.org; Thu, 20 Jun 2019 10:45:38 -0400 Received: from hqemgate15.nvidia.com ([216.228.121.64]:6435) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1hdyJk-0005IY-Do for qemu-devel@nongnu.org; Thu, 20 Jun 2019 10:45:36 -0400 Received: from hqpgpgate101.nvidia.com (Not Verified[216.228.121.13]) by hqemgate15.nvidia.com (using TLS: TLSv1.2, DES-CBC3-SHA) id ; Thu, 20 Jun 2019 07:40:18 -0700 Received: from hqmail.nvidia.com ([172.20.161.6]) by hqpgpgate101.nvidia.com (PGP Universal service); Thu, 20 Jun 2019 07:40:17 -0700 X-PGP-Universal: processed; by hqpgpgate101.nvidia.com on Thu, 20 Jun 2019 07:40:17 -0700 Received: from HQMAIL106.nvidia.com (172.18.146.12) by HQMAIL104.nvidia.com (172.18.146.11) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Thu, 20 Jun 2019 14:40:16 +0000 Received: from kwankhede-dev.nvidia.com (172.20.13.39) by HQMAIL.nvidia.com (172.18.146.12) with Microsoft SMTP Server (TLS) id 15.0.1473.3 via Frontend Transport; Thu, 20 Jun 2019 14:40:10 +0000 From: Kirti Wankhede To: , Date: Thu, 20 Jun 2019 20:07:31 +0530 Message-ID: <1561041461-22326-4-git-send-email-kwankhede@nvidia.com> X-Mailer: git-send-email 2.7.0 In-Reply-To: <1561041461-22326-1-git-send-email-kwankhede@nvidia.com> References: <1561041461-22326-1-git-send-email-kwankhede@nvidia.com> X-NVConfidentiality: public MIME-Version: 1.0 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t=1561041618; bh=820//1adwBrsybd0iJJD10rOM2cUvJ+T90dz3F2qvpc=; h=X-PGP-Universal:From:To:CC:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:X-NVConfidentiality:MIME-Version: Content-Type; b=osgsy+Tm16I7Tq/PIriD2F7zqY4SQUtbCutHyactcaKGyXR9CvxmzWeLla5Q3BHiW RQ7ocfkGCMqfj6vYo2LJ4XmVoIXBLgfBQwOipiFavdwL9ErBIdy+3vHuHRpWO9/9qy MD+/B3Knw8IF7sLDSLVkhxRY42Z+NZj9QKqU44Yw4YgkDvO7abtIglcHbJhQMdZYIl DGgqq42eG4sv9N4MuPMEy/311zQHvYZ6PShY6eJgdOh5agtuledZDTIuziAx4j3A8j 50TqyUvLI/kHjHpAlv1W8B6mh/NttGn9endBr+5lm7VjwoN0XYpkFhScL88DE7ecT3 ctqYKRbVp9Heg== X-detected-operating-system: by eggs.gnu.org: Windows 7 or 8 X-Received-From: 216.228.121.64 Subject: [Qemu-devel] [PATCH v4 03/13] vfio: Add save and load functions for VFIO PCI devices X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kirti Wankhede , Zhengxiao.zx@Alibaba-inc.com, kevin.tian@intel.com, yi.l.liu@intel.com, yan.y.zhao@intel.com, eskultet@redhat.com, ziye.yang@intel.com, qemu-devel@nongnu.org, cohuck@redhat.com, shuangtai.tst@alibaba-inc.com, dgilbert@redhat.com, zhi.a.wang@intel.com, mlevitsk@redhat.com, pasic@linux.ibm.com, aik@ozlabs.ru, yulei.zhang@intel.com, eauger@redhat.com, felipe@nutanix.com, jonathan.davies@nutanix.com, changpeng.liu@intel.com, Ken.Xue@amd.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP These functions save and restore PCI device specific data - config space of PCI device. Tested save and restore with MSI and MSIX type. Signed-off-by: Kirti Wankhede Reviewed-by: Neo Jia --- hw/vfio/pci.c | 112 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ hw/vfio/pci.h | 29 +++++++++++++++ 2 files changed, 141 insertions(+) diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c index ce3fe96efe2c..09a0821a5b1c 100644 --- a/hw/vfio/pci.c +++ b/hw/vfio/pci.c @@ -1187,6 +1187,118 @@ void vfio_pci_write_config(PCIDevice *pdev, } } +void vfio_pci_save_config(VFIODevice *vbasedev, QEMUFile *f) +{ + VFIOPCIDevice *vdev = container_of(vbasedev, VFIOPCIDevice, vbasedev); + PCIDevice *pdev = &vdev->pdev; + uint16_t pci_cmd; + int i; + + for (i = 0; i < PCI_ROM_SLOT; i++) { + uint32_t bar; + + bar = pci_default_read_config(pdev, PCI_BASE_ADDRESS_0 + i * 4, 4); + qemu_put_be32(f, bar); + } + + qemu_put_be32(f, vdev->interrupt); + if (vdev->interrupt == VFIO_INT_MSI) { + uint32_t msi_flags, msi_addr_lo, msi_addr_hi = 0, msi_data; + bool msi_64bit; + + msi_flags = pci_default_read_config(pdev, pdev->msi_cap + PCI_MSI_FLAGS, + 2); + msi_64bit = (msi_flags & PCI_MSI_FLAGS_64BIT); + + msi_addr_lo = pci_default_read_config(pdev, + pdev->msi_cap + PCI_MSI_ADDRESS_LO, 4); + qemu_put_be32(f, msi_addr_lo); + + if (msi_64bit) { + msi_addr_hi = pci_default_read_config(pdev, + pdev->msi_cap + PCI_MSI_ADDRESS_HI, + 4); + } + qemu_put_be32(f, msi_addr_hi); + + msi_data = pci_default_read_config(pdev, + pdev->msi_cap + (msi_64bit ? PCI_MSI_DATA_64 : PCI_MSI_DATA_32), + 2); + qemu_put_be32(f, msi_data); + } else if (vdev->interrupt == VFIO_INT_MSIX) { + uint16_t offset; + + /* save enable bit and maskall bit */ + offset = pci_default_read_config(pdev, + pdev->msix_cap + PCI_MSIX_FLAGS + 1, 2); + qemu_put_be16(f, offset); + msix_save(pdev, f); + } + pci_cmd = pci_default_read_config(pdev, PCI_COMMAND, 2); + qemu_put_be16(f, pci_cmd); +} + +void vfio_pci_load_config(VFIODevice *vbasedev, QEMUFile *f) +{ + VFIOPCIDevice *vdev = container_of(vbasedev, VFIOPCIDevice, vbasedev); + PCIDevice *pdev = &vdev->pdev; + uint32_t interrupt_type; + uint32_t msi_flags, msi_addr_lo, msi_addr_hi = 0, msi_data; + uint16_t pci_cmd; + bool msi_64bit; + int i; + + /* retore pci bar configuration */ + pci_cmd = pci_default_read_config(pdev, PCI_COMMAND, 2); + vfio_pci_write_config(pdev, PCI_COMMAND, + pci_cmd & (!(PCI_COMMAND_IO | PCI_COMMAND_MEMORY)), 2); + for (i = 0; i < PCI_ROM_SLOT; i++) { + uint32_t bar = qemu_get_be32(f); + + vfio_pci_write_config(pdev, PCI_BASE_ADDRESS_0 + i * 4, bar, 4); + } + vfio_pci_write_config(pdev, PCI_COMMAND, + pci_cmd | PCI_COMMAND_IO | PCI_COMMAND_MEMORY, 2); + + interrupt_type = qemu_get_be32(f); + + if (interrupt_type == VFIO_INT_MSI) { + /* restore msi configuration */ + msi_flags = pci_default_read_config(pdev, + pdev->msi_cap + PCI_MSI_FLAGS, 2); + msi_64bit = (msi_flags & PCI_MSI_FLAGS_64BIT); + + vfio_pci_write_config(pdev, pdev->msi_cap + PCI_MSI_FLAGS, + msi_flags & (!PCI_MSI_FLAGS_ENABLE), 2); + + msi_addr_lo = qemu_get_be32(f); + vfio_pci_write_config(pdev, pdev->msi_cap + PCI_MSI_ADDRESS_LO, + msi_addr_lo, 4); + + msi_addr_hi = qemu_get_be32(f); + if (msi_64bit) { + vfio_pci_write_config(pdev, pdev->msi_cap + PCI_MSI_ADDRESS_HI, + msi_addr_hi, 4); + } + msi_data = qemu_get_be32(f); + vfio_pci_write_config(pdev, + pdev->msi_cap + (msi_64bit ? PCI_MSI_DATA_64 : PCI_MSI_DATA_32), + msi_data, 2); + + vfio_pci_write_config(pdev, pdev->msi_cap + PCI_MSI_FLAGS, + msi_flags | PCI_MSI_FLAGS_ENABLE, 2); + } else if (interrupt_type == VFIO_INT_MSIX) { + uint16_t offset = qemu_get_be16(f); + + /* load enable bit and maskall bit */ + vfio_pci_write_config(pdev, pdev->msix_cap + PCI_MSIX_FLAGS + 1, + offset, 2); + msix_load(pdev, f); + } + pci_cmd = qemu_get_be16(f); + vfio_pci_write_config(pdev, PCI_COMMAND, pci_cmd, 2); +} + /* * Interrupt setup */ diff --git a/hw/vfio/pci.h b/hw/vfio/pci.h index 834a90d64686..847be5f56478 100644 --- a/hw/vfio/pci.h +++ b/hw/vfio/pci.h @@ -19,6 +19,7 @@ #include "qemu/queue.h" #include "qemu/timer.h" +#ifdef CONFIG_LINUX #define PCI_ANY_ID (~0) struct VFIOPCIDevice; @@ -202,4 +203,32 @@ void vfio_display_reset(VFIOPCIDevice *vdev); int vfio_display_probe(VFIOPCIDevice *vdev, Error **errp); void vfio_display_finalize(VFIOPCIDevice *vdev); +void vfio_pci_save_config(VFIODevice *vbasedev, QEMUFile *f); +void vfio_pci_load_config(VFIODevice *vbasedev, QEMUFile *f); + +static inline Object *vfio_pci_get_object(VFIODevice *vbasedev) +{ + VFIOPCIDevice *vdev = container_of(vbasedev, VFIOPCIDevice, vbasedev); + + return OBJECT(vdev); +} + +#else +static inline void vfio_pci_save_config(VFIODevice *vbasedev, QEMUFile *f) +{ + g_assert(false); +} + +static inline void vfio_pci_load_config(VFIODevice *vbasedev, QEMUFile *f) +{ + g_assert(false); +} + +static inline Object *vfio_pci_get_object(VFIODevice *vbasedev) +{ + return NULL; +} + +#endif + #endif /* HW_VFIO_VFIO_PCI_H */