From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:52501) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gPCqJ-0005tb-6b for qemu-devel@nongnu.org; Tue, 20 Nov 2018 15:41:59 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gPCqE-0003SW-TJ for qemu-devel@nongnu.org; Tue, 20 Nov 2018 15:41:55 -0500 Received: from hqemgate16.nvidia.com ([216.228.121.65]:10903) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1gPCqD-0003Q7-3q for qemu-devel@nongnu.org; Tue, 20 Nov 2018 15:41:50 -0500 From: Kirti Wankhede Date: Wed, 21 Nov 2018 02:09:40 +0530 Message-ID: <1542746383-18288-3-git-send-email-kwankhede@nvidia.com> In-Reply-To: <1542746383-18288-1-git-send-email-kwankhede@nvidia.com> References: <1542746383-18288-1-git-send-email-kwankhede@nvidia.com> MIME-Version: 1.0 Content-Type: text/plain Subject: [Qemu-devel] [PATCH 2/5] Add save and load functions for VFIO PCI devices List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: alex.williamson@redhat.com, cjia@nvidia.com Cc: kevin.tian@intel.com, ziye.yang@intel.com, changpeng.liu@intel.com, yi.l.liu@intel.com, mlevitsk@redhat.com, eskultet@redhat.com, cohuck@redhat.com, dgilbert@redhat.com, jonathan.davies@nutanix.com, eauger@redhat.com, aik@ozlabs.ru, pasic@linux.ibm.com, felipe@nutanix.com, Zhengxiao.zx@Alibaba-inc.com, shuangtai.tst@alibaba-inc.com, Ken.Xue@amd.com, zhi.a.wang@intel.com, qemu-devel@nongnu.org, Kirti Wankhede Save and restore with MSIX type is not tested. Signed-off-by: Kirti Wankhede Reviewed-by: Neo Jia --- hw/vfio/pci.c | 95 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ hw/vfio/pci.h | 29 ++++++++++++++++++ 2 files changed, 124 insertions(+) diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c index 6cbb8fa0549d..72daf1a358a0 100644 --- a/hw/vfio/pci.c +++ b/hw/vfio/pci.c @@ -1234,6 +1234,101 @@ 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; + 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) { + msix_save(pdev, f); + } +} + +void vfio_pci_load_config(VFIODevice *vbasedev, QEMUFile *f) +{ + VFIOPCIDevice *vdev = container_of(vbasedev, VFIOPCIDevice, vbasedev); + PCIDevice *pdev = &vdev->pdev; + uint32_t pci_cmd, interrupt_type; + uint32_t msi_flags, msi_addr_lo, msi_addr_hi = 0, msi_data; + 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(&vdev->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(&vdev->pdev, pdev->msi_cap + PCI_MSI_FLAGS, + msi_flags | PCI_MSI_FLAGS_ENABLE, 2); + } else if (vdev->interrupt == VFIO_INT_MSIX) { + msix_load(pdev, f); + } +} + /* * Interrupt setup */ diff --git a/hw/vfio/pci.h b/hw/vfio/pci.h index 52b065421a68..890d77d66a6b 100644 --- a/hw/vfio/pci.h +++ b/hw/vfio/pci.h @@ -20,6 +20,7 @@ #include "qemu/queue.h" #include "qemu/timer.h" +#ifdef CONFIG_LINUX #define PCI_ANY_ID (~0) struct VFIOPCIDevice; @@ -198,4 +199,32 @@ 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 */ -- 2.7.0