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s390x/kvm: run guest triggered resets on the target vcpu thread

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Currently, load_normal_reset() and modified_clear_reset() as triggered
by a guest vcpu will initiate cpu resets on the current vcpu thread for
all cpus. The reset should happen on the individual vcpu thread
instead, so let's use run_on_cpu() for this.

This avoids calls to synchronize_rcu() in the kernel.

Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
This commit is contained in:
David Hildenbrand 2014-08-28 13:58:49 +02:00 • committed by Christian Borntraeger
parent 8b3030114a
commit 85ca3371f6
2 changed files with 23 additions and 22 deletions
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15
target-s390x/cpu.h
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@ -353,6 +353,21 @@ static inline hwaddr decode_basedisp_s(CPUS390XState *env, uint32_t ipb)
/* Base/displacement are at the same locations. */
#define decode_basedisp_rs decode_basedisp_s
/* helper functions for run_on_cpu() */
static inline void s390_do_cpu_reset(void *arg)
{
CPUState *cs = arg;
S390CPUClass *scc = S390_CPU_GET_CLASS(cs);
scc->cpu_reset(cs);
}
static inline void s390_do_cpu_full_reset(void *arg)
{
CPUState *cs = arg;
cpu_reset(cs);
}
void s390x_tod_timer(void *opaque);
void s390x_cpu_timer(void *opaque);