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File _service:tar_scm:vfio-pci-Ascend910-need-4Bytes-quirk-in-bar0.patch of Package qemu
From 5b068100780cf91cc1696589d2115ba3078f9d38 Mon Sep 17 00:00:00 2001 From: Binfeng Wu <wubinfeng@huawei.com> Date: Tue, 8 Feb 2022 19:20:36 +0800 Subject: [PATCH] vfio/pci: Ascend910 need 4Bytes quirk in bar0 --- hw/vfio/pci-quirks.c | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) diff --git a/hw/vfio/pci-quirks.c b/hw/vfio/pci-quirks.c index 9ef4b63e82..ba4d8f020c 100644 --- a/hw/vfio/pci-quirks.c +++ b/hw/vfio/pci-quirks.c @@ -1210,8 +1210,11 @@ int vfio_pci_igd_opregion_init(VFIOPCIDevice *vdev, } #define PCI_VENDOR_ID_HUAWEI 0x19e5 +#define PCI_DEVICE_ID_ASCEND910 0xd801 #define PCI_DEVICE_ID_ASCEND710 0xd500 #define PCI_DEVICE_ID_ASCEND310 0xd100 +#define ASCEND910_XLOADER_SIZE 4 +#define ASCEND910_XLOADER_OFFSET 0x80400 #define ASCEND710_XLOADER_SIZE 4 #define ASCEND710_XLOADER_OFFSET 0x20430 #define ASCEND310_XLOADER_SIZE 4 @@ -1253,6 +1256,39 @@ static const MemoryRegionOps vfio_ascend_intercept_regs_quirk = { .endianness = DEVICE_LITTLE_ENDIAN, }; +static void vfio_probe_ascend910_bar0_quirk(VFIOPCIDevice *vdev, int nr) +{ + VFIOQuirk *quirk; + VFIOAscendBarQuirk *bar0_quirk; + + if (vdev->vendor_id != PCI_VENDOR_ID_HUAWEI || nr != 0 || + vdev->device_id != PCI_DEVICE_ID_ASCEND910) { + return; + } + + quirk = g_malloc0(sizeof(*quirk)); + quirk->nr_mem = 1; + quirk->mem = g_new0(MemoryRegion, quirk->nr_mem); + bar0_quirk = quirk->data = g_new0(typeof(*bar0_quirk), quirk->nr_mem); + bar0_quirk[0].vdev = vdev; + bar0_quirk[0].offset = ASCEND910_XLOADER_OFFSET; + bar0_quirk[0].bar = nr; + + /* + * intercept w/r to the xloader-updating register, + * so the vm can't enable xloader-updating + */ + memory_region_init_io(&quirk->mem[0], OBJECT(vdev), + &vfio_ascend_intercept_regs_quirk, + &bar0_quirk[0], + "vfio-ascend910-bar0-intercept-regs-quirk", + ASCEND910_XLOADER_SIZE); + memory_region_add_subregion_overlap(vdev->bars[nr].region.mem, + bar0_quirk[0].offset, + &quirk->mem[0], 1); + QLIST_INSERT_HEAD(&vdev->bars[nr].quirks, quirk, next); +} + static void vfio_probe_ascend710_bar0_quirk(VFIOPCIDevice *vdev, int nr) { VFIOQuirk *quirk; @@ -1371,6 +1407,7 @@ void vfio_bar_quirk_setup(VFIOPCIDevice *vdev, int nr) #ifdef CONFIG_VFIO_IGD vfio_probe_igd_bar4_quirk(vdev, nr); #endif + vfio_probe_ascend910_bar0_quirk(vdev, nr); vfio_probe_ascend710_bar0_quirk(vdev, nr); vfio_probe_ascend310_bar4_quirk(vdev, nr); } -- 2.27.0
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