From: Nathan Lynch Date: Fri, 10 Feb 2023 18:41:55 +0000 (-0600) Subject: powerpc/pseries: drop RTAS-based timebase synchronization X-Git-Tag: v6.3-rc1~87^2~29 X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=d6f7fe3b25f26213953066ce8109ea47dbd33cfa;p=linux-2.6-block.git powerpc/pseries: drop RTAS-based timebase synchronization The pseries platform has been LPAR-only for several generations, and the PAPR spec: * Guarantees that timebase synchronization is performed by the platform ("The timebase registers are synchronized by the platform before CPUs are given to the OS" - 7.3.8 SMP Support). * Completely omits the RTAS freeze-time-base and thaw-time-base RTAS functions, which are CHRP artifacts. This code is effectively unused on currently supported models, so drop it. Signed-off-by: Nathan Lynch Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20230125-b4-powerpc-rtas-queue-v3-7-26929c8cce78@linux.ibm.com --- diff --git a/arch/powerpc/platforms/pseries/smp.c b/arch/powerpc/platforms/pseries/smp.c index fd2174edfa1d..2bcfee86ff87 100644 --- a/arch/powerpc/platforms/pseries/smp.c +++ b/arch/powerpc/platforms/pseries/smp.c @@ -278,11 +278,5 @@ void __init smp_init_pseries(void) cpumask_clear_cpu(boot_cpuid, of_spin_mask); } - /* Non-lpar has additional take/give timebase */ - if (rtas_token("freeze-time-base") != RTAS_UNKNOWN_SERVICE) { - smp_ops->give_timebase = rtas_give_timebase; - smp_ops->take_timebase = rtas_take_timebase; - } - pr_debug(" <- smp_init_pSeries()\n"); }