> From: Haiyang Zhang <haiyangz@xxxxxxxxxxxxx> > > > ... > > > - if (gen2vm) { > > > - pot_start = 0; > > > - pot_end = -1; > > > - } else { > > > - if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM) || > > > - pci_resource_len(pdev, 0) < screen_fb_size) { > > > - pr_err("Resource not available or (0x%lx < 0x%lx)\n", > > > - (unsigned long) pci_resource_len(pdev, 0), > > > - (unsigned long) screen_fb_size); > > > - goto err1; > > > > This restriction has been in place since day 1. Haiyang, you wrote this > > driver. Can you comment on whether this change here is sensible? > > When I initially implemented this driver 10 years ago, I believe there > was smaller limit for the fb... But I think this patch is good for the > newer MMIO alloc scheme. I hope to see reviews also from > @Dexuan Cui @Michael Kelley (LINUX) who are more familiar with > the PCI/BAR/MMIO area. > > Thanks, > - Haiyang The patch looks good to me but I suggest we check with the Hyper-V team to figure out how a Gen1 Windows VM supports a higher resolution that needs a VRAM size of more than 64MB. Just in case we miss something.. Thanks, -- Dexuan