On Thu, Feb 20, 2025 at 6:30 AM Sergio Lopez <slp@xxxxxxxxxx> wrote: [...] > @@ -829,6 +839,7 @@ static int virtio_pci_find_shm_cap(struct pci_dev *dev, u8 required_id, > *bar = res_bar; > *offset = res_offset; > *len = res_length; > + *page_size = 1 << (page_shift + 12); Maybe this should validate that page_shift is in range to avoid any funny business from the device; since page_size is u32, this needs page_shift + 12 < 32. (If it's out of range, I am not sure what this should do; maybe just warn and set it to the default 4096?) Also shifting into the sign bit is technically undefined (or implementation-defined? I don't recall) behavior, so perhaps make the constant unsigned, e.g. `1U << (page_shift + 12)`. Other than that, looks reasonable to me: Reviewed-by: Daniel Verkamp <dverkamp@xxxxxxxxxxxx> Thanks, -- Daniel
