On Thu, Jul 22, 2021 at 11:59:17AM -0500, Sierra Guiza, Alejandro (Alex) wrote: > > On 7/22/2021 7:23 AM, Jason Gunthorpe wrote: > > On Sat, Jul 17, 2021 at 02:21:32PM -0500, Alex Sierra wrote: > > > In order to configure device generic in test_hmm, two > > > module parameters should be passed, which correspon to the > > > SP start address of each device (2) spm_addr_dev0 & > > > spm_addr_dev1. If no parameters are passed, private device > > > type is configured. > > I don't think tests should need configuration like this, is it really > > necessary? How can people with normal HW run this test? > Hi Jason, > The idea was to add an easy way to validate the codepaths touched by this > patch series, which make modifications to the migration helpers for device > generic type pages. We're using CONFIG_EFI_FAKE_MEMMAP to create fake SPM > devices inside system memory. No special HW needed. And passing the kernel > parameter efi_fake_mem. Ex. efi_fake_mem=1G@0x100000000:0x40000. I should > probably need to include a small example of how to set this in the > test_hmm.sh > usage(). I don't think anything about hmm is sensitive to how the pages are acquired - you can't create device generic pages without relying on FAKE_MEMMAP? Jason
