diff options
Diffstat (limited to 'kernel/bar_emulation.c')
| -rw-r--r-- | kernel/bar_emulation.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/kernel/bar_emulation.c b/kernel/bar_emulation.c index eaa006c..3448b8c 100644 --- a/kernel/bar_emulation.c +++ b/kernel/bar_emulation.c @@ -280,6 +280,36 @@ int nv_vgpu_bar_emul_init(struct nv_vgpu_device *vgpu) *(u32 *)((u8 *)ctx->bar0_shadow + 0x100ce0) = 0x00000018; /* + * NV_PCFG (BAR0+0x88000) - PCI config space mirror the driver reads + * via gpuReadBusConfigReg_HAL (GPU_BUS_CFG_RD32): + * 0x88084 NV_XVE_LINK_CAPABILITIES: MAX_LINK_SPEED 3:0 = 3 (8 GT/s, + * Gen3), MAX_LINK_WIDTH 9:4 = 0x10 (x16). + * 0x88088 NV_XVE_LINK_CONTROL_STATUS: negotiated speed 19:16 = 3, + * negotiated width 25:20 = 0x10 (x16). + * UVM's nvGpuOpsDeviceCreate -> getPCIELinkRateMBps -> + * kbifControlGetPCIEInfo -> kbifGetGpuLinkCapabilities reads 0x88084; + * zeros make calculatePCIELinkRateMBps log "Unknown PCIe speed" and + * return NV_ERR_INVALID_STATE, which fails cuInit + * (CUDA_ERROR_NOT_INITIALIZED in the guest). + * + * DEVICE_BASE(NV_PCFG) expands to 0 in this driver (nvmisc.h: + * "#define DEVICE_BASE(d) (0?d)"), so the read is actually + * gpuNvAddr + 0x84 - mirror the values at the low alias as well. + */ + *(u32 *)((u8 *)ctx->bar0_shadow + 0x88084) = 0x00000103; + *(u32 *)((u8 *)ctx->bar0_shadow + 0x88088) = 0x01030000; + *(u32 *)((u8 *)ctx->bar0_shadow + 0x00084) = 0x00000103; + *(u32 *)((u8 *)ctx->bar0_shadow + 0x00088) = 0x01030000; + /* Same values under the VF register window aliases, in case this + * driver reaches the config mirror through virtualRegPhysOffset. */ + *(u32 *)((u8 *)ctx->bar0_shadow + 0xB80084) = 0x00000103; + *(u32 *)((u8 *)ctx->bar0_shadow + 0xB80088) = 0x01030000; + *(u32 *)((u8 *)ctx->bar0_shadow + 0xB88084) = 0x00000103; + *(u32 *)((u8 *)ctx->bar0_shadow + 0xB88088) = 0x01030000; + *(u32 *)((u8 *)ctx->bar0_shadow + 0xC08084) = 0x00000103; + *(u32 *)((u8 *)ctx->bar0_shadow + 0xC08088) = 0x01030000; + + /* * Serve a valid VBIOS at the PROM window (BAR0+0x300000). * * The guest driver's physical GSP boot (kgspInitRm -> TU102 path) |