提交 1fcf7ce0 编写于 作者: L Lorenzo Pieralisi

arm: kvm: implement CPU PM notifier

Upon CPU shutdown and consequent warm-reboot, the hypervisor CPU state
must be re-initialized. This patch implements a CPU PM notifier that
upon warm-boot calls a KVM hook to reinitialize properly the hypervisor
state so that the CPU can be safely resumed.
Acked-by: NMarc Zyngier <marc.zyngier@arm.com>
Acked-by: NChristoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: NLorenzo Pieralisi <lorenzo.pieralisi@arm.com>
上级 fb1ab1ab
......@@ -17,6 +17,7 @@
*/
#include <linux/cpu.h>
#include <linux/cpu_pm.h>
#include <linux/errno.h>
#include <linux/err.h>
#include <linux/kvm_host.h>
......@@ -853,6 +854,33 @@ static struct notifier_block hyp_init_cpu_nb = {
.notifier_call = hyp_init_cpu_notify,
};
#ifdef CONFIG_CPU_PM
static int hyp_init_cpu_pm_notifier(struct notifier_block *self,
unsigned long cmd,
void *v)
{
if (cmd == CPU_PM_EXIT) {
cpu_init_hyp_mode(NULL);
return NOTIFY_OK;
}
return NOTIFY_DONE;
}
static struct notifier_block hyp_init_cpu_pm_nb = {
.notifier_call = hyp_init_cpu_pm_notifier,
};
static void __init hyp_cpu_pm_init(void)
{
cpu_pm_register_notifier(&hyp_init_cpu_pm_nb);
}
#else
static inline void hyp_cpu_pm_init(void)
{
}
#endif
/**
* Inits Hyp-mode on all online CPUs
*/
......@@ -1013,6 +1041,8 @@ int kvm_arch_init(void *opaque)
goto out_err;
}
hyp_cpu_pm_init();
kvm_coproc_table_init();
return 0;
out_err:
......
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