[PATCH] powerpc/powernv/idle: Fix restore of SPRN_LDBAR for POWER9 stop state.
flat view
STALE2648d
LANDED
From: Madhavan Srinivasan <hidden>
Date: 2019-07-02 11:00:52
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Linus Torvalds
Landed in mainline as f5a9e488d623 on 2019-07-12.
From: Athira Rajeev <redacted>
commit 10d91611f426 ("powerpc/64s: Reimplement book3s idle code in C")
reimplemented book3S code to pltform/powernv/idle.c. But when doing so
missed to add the per-thread LDBAR update in the core_woken path of
the power9_idle_stop(). Patch fixes the same.
Fixes: 10d91611f426 ("powerpc/64s: Reimplement book3s idle code in C")
Signed-off-by: Athira Rajeev <redacted>
Signed-off-by: Madhavan Srinivasan <redacted>
---
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 2f4479b94ac3..fd14a6237954 100644
--- a/arch/powerpc/platforms/powernv/idle.c
+++ b/arch/powerpc/platforms/powernv/idle.c@@ -758,7 +758,6 @@ static unsigned long power9_idle_stop(unsigned long psscr, bool mmu_on) mtspr(SPRN_PTCR, sprs.ptcr); mtspr(SPRN_RPR, sprs.rpr); mtspr(SPRN_TSCR, sprs.tscr); - mtspr(SPRN_LDBAR, sprs.ldbar); if (pls >= pnv_first_tb_loss_level) { /* TB loss */
@@ -790,6 +789,7 @@ static unsigned long power9_idle_stop(unsigned long psscr, bool mmu_on) mtspr(SPRN_MMCR0, sprs.mmcr0); mtspr(SPRN_MMCR1, sprs.mmcr1); mtspr(SPRN_MMCR2, sprs.mmcr2); + mtspr(SPRN_LDBAR, sprs.ldbar); mtspr(SPRN_SPRG3, local_paca->sprg_vdso);
--
2.20.1