On Thu, 2017-06-08 at 10:34 -0700, Dan Williams wrote: > On Thu, Jun 8, 2017 at 10:30 AM, Linda Knippers <[email protected] > om> wrote: > [..] > > Wasn't Dan concerned about how the OS can know whether the FW > > supports that bit in the Start ARS? > > > > The Query ARS Capabilities DSM has a bit that tells the OS whether > > the platform supports the notification and the point of the > > notification was to tell the OS it could do a Start ARS with bit 1 > > set. Of course, if you get the notification then that means the > > platform has the capability to deliver it, but it might not hurt to > > check the flag from the Query Capabilities bit. > > Good point, yes, I think it is safe to assume that a BIOS that claims > to support un-correctable error notification also supports this Start > ARS flag.
Yes, ACPI 6.2, section 9.20.7.2, defines that: Upon receiving the notification, the OSPM may decide to issue a Start ARS with Flags Bit [1] set to prepare for the retrieval of existing records and issue the Query ARS Status function to retrieve the records. So, I believe it is safe to assume that BIOS supporting 0x81 also supports flags Big [1]. Sorry, this is what I should have said in my previous email... Thanks, -Toshi
