| Message ID | 20190513053910.19227-1-mikey@neuling.org (mailing list archive) |
|---|---|
| State | Accepted |
| Commit | ba45cff610a4223ce3ad98a700a820e3d60e3f7c |
| Headers | show |
| Series | powerpc: Document xive=off option | expand |
| Context | Check | Description |
|---|---|---|
| snowpatch_ozlabs/apply_patch | success | Successfully applied on branch next (8150a153c013aa2dd1ffae43370b89ac1347a7fb) |
| snowpatch_ozlabs/build-ppc64le | success | Build succeeded |
| snowpatch_ozlabs/build-ppc64be | success | Build succeeded |
| snowpatch_ozlabs/build-ppc64e | success | Build succeeded |
| snowpatch_ozlabs/build-pmac32 | success | Build succeeded |
| snowpatch_ozlabs/checkpatch | success | total: 0 errors, 0 warnings, 0 checks, 15 lines checked |
On 5/13/19 7:39 AM, Michael Neuling wrote: > commit 243e25112d06 ("powerpc/xive: Native exploitation of the XIVE > interrupt controller") added an option to turn off Linux native XIVE > usage via the xive=off kernel command line option. > > This documents this option. > > Signed-off-by: Michael Neuling <mikey@neuling.org> Reviewed-by: Cédric Le Goater <clg@kaod.org> But, We should fix the behavior because xive=off does not work on pseries. This is not handled correctly in prom when CAS negotiates with the hypervisor which interrupt mode is to be used. I haven't tried this option on PowerNV. Cheers, C. > --- > Documentation/admin-guide/kernel-parameters.txt | 9 +++++++++ > 1 file changed, 9 insertions(+) > > diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt > index c45a19d654..ee410d0ef4 100644 > --- a/Documentation/admin-guide/kernel-parameters.txt > +++ b/Documentation/admin-guide/kernel-parameters.txt > @@ -5177,6 +5177,15 @@ > Format: > <irq>,<irq_mask>,<io>,<full_duplex>,<do_sound>,<lockup_hack>[,<irq2>[,<irq3>[,<irq4>]]] > > + xive= [PPC] > + By default on POWER9 and above, the kernel will > + natively use the XIVE interrupt controller. This option > + allows the fallback firmware mode to be used: > + > + off Fallback to firmware control of XIVE interrupt > + controller on both pseries and powernv > + platforms. Only useful on POWER9 and above. > + > xhci-hcd.quirks [USB,KNL] > A hex value specifying bitmask with supplemental xhci > host controller quirks. Meaning of each bit can be >
Michael Neuling <mikey@neuling.org> writes: > commit 243e25112d06 ("powerpc/xive: Native exploitation of the XIVE > interrupt controller") added an option to turn off Linux native XIVE > usage via the xive=off kernel command line option. > > This documents this option. > > Signed-off-by: Michael Neuling <mikey@neuling.org> Acked-by: Stewart Smith <stewart@linux.ibm.com>
On Mon, 2019-05-13 at 05:39:10 UTC, Michael Neuling wrote: > commit 243e25112d06 ("powerpc/xive: Native exploitation of the XIVE > interrupt controller") added an option to turn off Linux native XIVE > usage via the xive=off kernel command line option. > > This documents this option. > > Signed-off-by: Michael Neuling <mikey@neuling.org> > Reviewed-by: Cédric Le Goater <clg@kaod.org> > Acked-by: Stewart Smith <stewart@linux.ibm.com> Applied to powerpc next, thanks. https://git.kernel.org/powerpc/c/ba45cff610a4223ce3ad98a700a820e3d60e3f7c cheers
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index c45a19d654..ee410d0ef4 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -5177,6 +5177,15 @@ Format: <irq>,<irq_mask>,<io>,<full_duplex>,<do_sound>,<lockup_hack>[,<irq2>[,<irq3>[,<irq4>]]] + xive= [PPC] + By default on POWER9 and above, the kernel will + natively use the XIVE interrupt controller. This option + allows the fallback firmware mode to be used: + + off Fallback to firmware control of XIVE interrupt + controller on both pseries and powernv + platforms. Only useful on POWER9 and above. + xhci-hcd.quirks [USB,KNL] A hex value specifying bitmask with supplemental xhci host controller quirks. Meaning of each bit can be
commit 243e25112d06 ("powerpc/xive: Native exploitation of the XIVE interrupt controller") added an option to turn off Linux native XIVE usage via the xive=off kernel command line option. This documents this option. Signed-off-by: Michael Neuling <mikey@neuling.org> --- Documentation/admin-guide/kernel-parameters.txt | 9 +++++++++ 1 file changed, 9 insertions(+)