[SPARC64]: Pass multiple CPUs at once to hypervisor cross-call API. (d371c0c1) · Commits · e / devices / android_kernel_xiaomi_nabu

arch/sparc64/kernel/smp.c

+0 −54

Original line number	Original line	Diff line number	Diff line
	@@ -557,7 +557,6 @@ static void cheetah_xcall_deliver(u64 data0, u64 data1, u64 data2, cpumask_t mas
	}		}
	}		}

	#if 0
	/* Multi-cpu list version. */		/* Multi-cpu list version. */
	static int init_cpu_list(u16 *list, cpumask_t mask)		static int init_cpu_list(u16 *list, cpumask_t mask)
	{		{
	@@ -631,59 +630,6 @@ static void hypervisor_xcall_deliver(u64 data0, u64 data1, u64 data2, cpumask_t

	put_cpu();		put_cpu();
	}		}
	#else
	/* Single-cpu list version. */
	static void hypervisor_xcall_deliver(u64 data0, u64 data1, u64 data2, cpumask_t mask)
	{
	int this_cpu = get_cpu();
	struct trap_per_cpu *tb = &trap_block[this_cpu];
	u64 *mondo = __va(tb->cpu_mondo_block_pa);
	u16 *cpu_list = __va(tb->cpu_list_pa);
	int i;

	mondo[0] = data0;
	mondo[1] = data1;
	mondo[2] = data2;
	wmb();

	for_each_cpu_mask(i, mask) {
	int retries = 0;

	do {
	register unsigned long func __asm__("%o5");
	register unsigned long arg0 __asm__("%o0");
	register unsigned long arg1 __asm__("%o1");
	register unsigned long arg2 __asm__("%o2");

	cpu_list[0] = i;
	func = HV_FAST_CPU_MONDO_SEND;
	arg0 = 1;
	arg1 = tb->cpu_list_pa;
	arg2 = tb->cpu_mondo_block_pa;

	__asm__ __volatile__("ta %8"
	: "=&r" (func), "=&r" (arg0),
	"=&r" (arg1), "=&r" (arg2)
	: "0" (func), "1" (arg0),
	"2" (arg1), "3" (arg2),
	"i" (HV_FAST_TRAP)
	: "memory");
	if (likely(arg0 == HV_EOK))
	break;

	if (unlikely(++retries > 100)) {
	printk("CPU[%d]: sun4v mondo error %lu\n",
	this_cpu, func);
	break;
	}

	udelay(2 * i);
	} while (1);
	}

	put_cpu();
	}
	#endif

	/* Send cross call to all processors mentioned in MASK		/* Send cross call to all processors mentioned in MASK
	* except self.		* except self.