On Fri, Aug 19, 2022 at 11:28:24AM -0700, Dave Hansen wrote: > On 8/19/22 09:02, Paul Menzel wrote: > > On the Dell XPS 13 9370, Linux 5.18.16 prints the warning below: > > > > ``` > > [ 0.000000] Linux version 5.18.0-4-amd64 > > (debian-kernel@xxxxxxxxxxxxxxxx) (gcc-11 (Debian 11.3.0-5) 11.3.0, GNU > > ld (GNU Binutils for Debian) 2.38.90.20220713) #1 SMP PREEMPT_DYNAMIC > > Debian 5.18.16-1 (2022-08-10) > > [ 0.000000] Command line: BOOT_IMAGE=/vmlinuz-5.18.0-4-amd64 > > root=UUID=56f398e0-1e25-4fda-aa9f-611dece4b333 ro quiet > > […] > > [ 0.000000] DMI: Dell Inc. XPS 13 9370/0RMYH9, BIOS 1.21.0 07/06/2022 > > […] > > [ 0.235418] sgx: EPC section 0x40200000-0x45f7ffff > > Hi Paul, > > Would you be able to send the entire dmesg, along with: > > cat /proc/iomem # (as root) > and > cpuid -1 --raw > > I'm suspecting either a BIOS problem. Reinette (cc'd) also thought this > might be a case of the SGX initialization getting a bit too far along > when it should have been disabled. > > We had some bugs where we didn't stop fast enough after spitting out the > "SGX Launch Control is locked..." errors. For some reason the pages do not get properly sanitized: /* sanity check: */ WARN_ON(!list_empty(&sgx_dirty_page_list)); EPC should be good, given that EREMOVE does not fail. If SGX would be disabled, also EREMOVE should fail. BR, Jarkko
