From 1f0ce497433f8944045ee1baae218e31a0d295ee Mon Sep 17 00:00:00 2001 From: Nicholas Piggin Date: Sun, 26 Jul 2020 13:51:53 +1000 Subject: powerpc: Inline doorbell sending functions MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit These are only called in one place for a given platform, so inline them for performance. Signed-off-by: Nicholas Piggin Tested-by: Cédric Le Goater [mpe: Fix build errors related to KVM] Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20200726035155.1424103-2-npiggin@gmail.com --- arch/powerpc/kernel/dbell.c | 55 --------------------------------------------- 1 file changed, 55 deletions(-) (limited to 'arch/powerpc/kernel') diff --git a/arch/powerpc/kernel/dbell.c b/arch/powerpc/kernel/dbell.c index f17ff1200eaa..52680cf07c9d 100644 --- a/arch/powerpc/kernel/dbell.c +++ b/arch/powerpc/kernel/dbell.c @@ -18,61 +18,6 @@ #ifdef CONFIG_SMP -/* - * Doorbells must only be used if CPU_FTR_DBELL is available. - * msgsnd is used in HV, and msgsndp is used in !HV. - * - * These should be used by platform code that is aware of restrictions. - * Other arch code should use ->cause_ipi. - * - * doorbell_global_ipi() sends a dbell to any target CPU. - * Must be used only by architectures that address msgsnd target - * by PIR/get_hard_smp_processor_id. - */ -void doorbell_global_ipi(int cpu) -{ - u32 tag = get_hard_smp_processor_id(cpu); - - kvmppc_set_host_ipi(cpu); - /* Order previous accesses vs. msgsnd, which is treated as a store */ - ppc_msgsnd_sync(); - ppc_msgsnd(PPC_DBELL_MSGTYPE, 0, tag); -} - -/* - * doorbell_core_ipi() sends a dbell to a target CPU in the same core. - * Must be used only by architectures that address msgsnd target - * by TIR/cpu_thread_in_core. - */ -void doorbell_core_ipi(int cpu) -{ - u32 tag = cpu_thread_in_core(cpu); - - kvmppc_set_host_ipi(cpu); - /* Order previous accesses vs. msgsnd, which is treated as a store */ - ppc_msgsnd_sync(); - ppc_msgsnd(PPC_DBELL_MSGTYPE, 0, tag); -} - -/* - * Attempt to cause a core doorbell if destination is on the same core. - * Returns 1 on success, 0 on failure. - */ -int doorbell_try_core_ipi(int cpu) -{ - int this_cpu = get_cpu(); - int ret = 0; - - if (cpumask_test_cpu(cpu, cpu_sibling_mask(this_cpu))) { - doorbell_core_ipi(cpu); - ret = 1; - } - - put_cpu(); - - return ret; -} - void doorbell_exception(struct pt_regs *regs) { struct pt_regs *old_regs = set_irq_regs(regs); -- cgit v1.2.3