[SPARC64]: Do not try to write to %tick or %stick on SUN4V. (7aa62645) · Commits · 戴 / test

arch/sparc64/kernel/time.c

+16 −10

Original line number	Diff line number	Diff line
		@@ -193,6 +193,11 @@ struct sparc64_tick_ops *tick_ops __read_mostly = &tick_operations;

		static void stick_init_tick(unsigned long offset)
		{
		/* Writes to the %tick and %stick register are not
		* allowed on sun4v. The Hypervisor controls that
		* bit, per-strand.
		*/
		if (tlb_type != hypervisor) {
		tick_disable_protection();

		/* Let the user get at STICK too. */
		@@ -203,6 +208,7 @@ static void stick_init_tick(unsigned long offset)
		: /* no outputs */
		: "r" (TICK_PRIV_BIT)
		: "g1", "g2");
		}

		__asm__ __volatile__(
		" rd %%asr24, %%g1\n"