David Miller wrote: [Tue Sep 09 2014, 03:17:52PM EDT] > From: Bob Picco <bpicco@xxxxxxxxxx> > Date: Sun, 7 Sep 2014 11:45:07 -0400 > > > From: bob picco <bpicco@xxxxxxxxxx> > > > > This patch attempts to do a few things. The highlights are: 1) provides the > > option to enable SPARSE_IRQ, 2) allocates ivector_table at boot time and > > 3) default to cookie only VIRQ mechanism for supported firmware. The > > first firmware with cookie only support for me appears on T5. You can > > optionally force the HV firmware to not cookie only mode which is the > > sysino support. > > > > The sysino is a deprecated HV mechanism according to the most recent > > SPARC Virtual Machine Specification. HV_GRP_INTR is what controls the > > cookie/sysino firmware versioning. The history appears to be something like > > this: > > major version 2 was dropped. > > major version 3 is where a cookie only VIRQ > > is possible. Using version 3 means ivector_table isn't required. > > > > A new boot option is provided should cookie only HV support have issues. > > hvirq - this is the version for HV_GRP_INTR. This is related to HV API > > versioning. The code attempts major=3 first by default. The option can > > be used to override this default. > > > > I've tested with SPARSE_IRQ on T5-8, M7-4 and T4-X and Ultra 45. I've also > > tested Ultra45 (Jalap?no) with !SPARSE_IRQ. > > > > Cc: sparclinux@xxxxxxxxxxxxxxx > > Signed-off-by: Bob Picco <bob.picco@xxxxxxxxxx> > > Let's just bite the bullet and enable SPARSE_IRQ unconditionally > on SPARC64. Okay. Do you require more from me? > > That will decrease the vmlinux image size and increase the testing > coverage of SPARSE_IRQ. Sounds good. thanx, bob -- To unsubscribe from this list: send the line "unsubscribe sparclinux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
