From: Athira Rajeev Date: Tue, 2 Jul 2019 10:58:36 +0000 (+0530) Subject: powerpc/powernv/idle: Fix restore of SPRN_LDBAR for POWER9 stop state. X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=f5a9e488d62360c91c5770bd55a0b40e419a71ce;p=linux.git powerpc/powernv/idle: Fix restore of SPRN_LDBAR for POWER9 stop state. 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") Cc: stable@vger.kernel.org # v5.2+ Signed-off-by: Athira Rajeev Signed-off-by: Madhavan Srinivasan Reviewed-by: Nicholas Piggin Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20190702105836.26695-1-maddy@linux.vnet.ibm.com --- diff --git a/arch/powerpc/platforms/powernv/idle.c b/arch/powerpc/platforms/powernv/idle.c index f9ab895107662..210fb73a5121f 100644 --- a/arch/powerpc/platforms/powernv/idle.c +++ b/arch/powerpc/platforms/powernv/idle.c @@ -762,7 +762,6 @@ 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 */ @@ -794,6 +793,7 @@ core_woken: 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);