v3: https://lkml.org/lkml/2020/7/17/1093
Changelog v3-->v4:
Based on comments from Nicholas Piggin and Gautham Shenoy,
1. Changed the naming of pnv_first_spr_loss_level from
pnv_first_fullstate_loss_level to deep_spr_loss_state
2. Make the P9 PVR check only on the top level function
pnv_probe_idle_states and let the rest of the checks be DT based because
it is faster to do so
Pratik Rajesh Sampat (3):
powerpc/powernv/idle: Replace CPU features check with PVR check
powerpc/powernv/idle: Rename pnv_first_spr_loss_level variable
powerpc/powernv/idle: Exclude mfspr on HID1,4,5 on P9 and above
arch/powerpc/platforms/powernv/idle.c | 26 +++++++++++++-------------
1 file changed, 13 insertions(+), 13 deletions(-)
--
2.25.4
As the idle framework's architecture is incomplete, hence instead of
checking for just the processor type advertised in the device tree CPU
features; check for the Processor Version Register (PVR) so that finer
granularity can be leveraged while making processor checks.
Hence, making the PVR check on the outer level function, subsequently in
the hierarchy keeping the CPU_FTR_ARCH_300 check intact as it is a
faster check to do because of static branches
Signed-off-by: Pratik Rajesh Sampat <[email protected]>
---
arch/powerpc/platforms/powernv/idle.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/powerpc/platforms/powernv/idle.c b/arch/powerpc/platforms/powernv/idle.c
index 2dd467383a88..642abf0b8329 100644
--- a/arch/powerpc/platforms/powernv/idle.c
+++ b/arch/powerpc/platforms/powernv/idle.c
@@ -1205,7 +1205,7 @@ static void __init pnv_probe_idle_states(void)
return;
}
- if (cpu_has_feature(CPU_FTR_ARCH_300))
+ if (pvr_version_is(PVR_POWER9))
pnv_power9_idle_init();
for (i = 0; i < nr_pnv_idle_states; i++)
--
2.25.4
On Tue, 21 Jul 2020 21:07:05 +0530, Pratik Rajesh Sampat wrote:
> v3: https://lkml.org/lkml/2020/7/17/1093
> Changelog v3-->v4:
> Based on comments from Nicholas Piggin and Gautham Shenoy,
> 1. Changed the naming of pnv_first_spr_loss_level from
> pnv_first_fullstate_loss_level to deep_spr_loss_state
> 2. Make the P9 PVR check only on the top level function
> pnv_probe_idle_states and let the rest of the checks be DT based because
> it is faster to do so
>
> [...]
Applied to powerpc/next.
[1/3] powerpc/powernv/idle: Replace CPU feature check with PVR check
https://git.kernel.org/powerpc/c/8747bf36f312356f8a295a0c39ff092d65ce75ae
[2/3] powerpc/powernv/idle: Rename pnv_first_spr_loss_level variable
https://git.kernel.org/powerpc/c/dcbbfa6b05daca94ebcdbce80a7cf05c717d2942
[3/3] powerpc/powernv/idle: Exclude mfspr on HID1, 4, 5 on P9 and above
https://git.kernel.org/powerpc/c/5c92fb1b46102e1efe0eed69e743f711bc1c7d2e
cheers