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When cpus != maxcpus cpuidle-haltpoll will fail to register all vcpus
past the online ones and thus fail to register the idle driver.
This is because cpuidle_add_sysfs() will return with -ENODEV as a
consequence from get_cpu_device() return no device for a non-existing
CPU.
Instead switch to cpuidle_register_driver() and manually register each
of the present cpus through cpuhp_setup_state() callbacks and future
ones that get onlined or offlined. This mimmics similar logic that
intel_idle does.
Fixes: fa86ee90eb ("add cpuidle-haltpoll driver")
Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
17 lines
312 B
C
17 lines
312 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _CPUIDLE_HALTPOLL_H
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#define _CPUIDLE_HALTPOLL_H
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#ifdef CONFIG_ARCH_CPUIDLE_HALTPOLL
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#include <asm/cpuidle_haltpoll.h>
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#else
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static inline void arch_haltpoll_enable(unsigned int cpu)
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{
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}
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static inline void arch_haltpoll_disable(unsigned int cpu)
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{
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}
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#endif
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#endif
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