Hi Dongjiu Geng, On 09/04/18 22:36, Dongjiu Geng wrote: > 1. Detect whether KVM can set set guest SError syndrome > 2. Support to Set VSESR_EL2 and inject SError by user space. > 3. Support live migration to keep SError pending state and VSESR_EL2 value. > 4. ACPI 6.1 adds support for NOTIFY_SEI as a GHES notification mechanism, so support this > notification in software, KVM or kernel ARCH code call handle_guest_sei() to let ACP driver > to handle this notification. Please don't post code during the merge-window, will this apply to v4.17-rc1? We can't know until its tagged. This series is doing two separate things, please split it into two series. But on the ACPI front: I don't see how any OS can support your NOTIFY_SEI when firmware is ignoring the normal world's PSTATE.A. The latest lobe of that discussion was on the list here: https://www.mail-archive.com/linux-kernel@xxxxxxxxxxxxxxx/msg1611496.html As it is, we would need to spot SError being delivered while SError is masked, spray nasty messages about firmware being horrifically buggy, then panic(). For a corrected error, this looks bad, but its preferable to letting firmware silently overwrite the exception registers, causing linux to spin through the vectors 'eret' with all exceptions masked. I still think its best to wait for firmware that does the right thing. Thanks, James
