>>> On 24.01.13 at 19:20, Matt Fleming <[email protected]> wrote: > On Fri, 2013-01-18 at 12:35 +0000, Jan Beulich wrote: >> This fixes two issues: >> - wrong memory type used for allocation intended to persist post-boot > > [...] > >> @@ -311,7 +311,7 @@ static efi_status_t setup_efi_pci(struct >> size = pci->romsize + sizeof(*rom); >> >> status = efi_call_phys3(sys_table->boottime->allocate_pool, >> - EFI_LOADER_DATA, size, &rom); >> + EFI_RUNTIME_SERVICES_DATA, size, &rom); >> >> if (status != EFI_SUCCESS) >> continue; > > I'm curious why you made this change. No one should be stealing that > region of memory because that's all handled in parse_e820_ext() - it's > marked as off limits wrt memory for the kernel's use. And the firmware > certainly shouldn't start touching it.
According to my reading of do_add_efi_memmap(), EFI_LOADER_DATA gets treated the same as EFI_CONVENTIONAL_MEMORY, i.e. gets marked as available for allocation. That's also how I'd expect things to be. I don't think parse_e820_ext() matters here at all. > Have you witnessed some case where things explode without your change? No, I didn't. I merely spotted this when evaluating the code for porting over to Xen. Jan -- To unsubscribe from this list: send the line "unsubscribe linux-efi" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
