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KVM: PPC: Book3S HV: Use generic kvm module parameters 

The previous patch exported the variables which back the module parameters
of the generic kvm module. Now use these variables in the kvm-hv module
so that any change to the generic module parameters will also have the
same effect for the kvm-hv module. This removes the duplication of the
kvm module parameters which was redundant and should reduce confusion when
tuning them.

Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
This commit is contained in:
Suraj Jitindar Singh 2016-10-14 11:53:20 +11:00 committed by Paul Mackerras
parent ec76d819d2
commit 307d93e476
1 changed files with 6 additions and 23 deletions
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29
arch/powerpc/kvm/book3s_hv.c
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@ -108,23 +108,6 @@ module_param_cb(h_ipi_redirect, &module_param_ops, &h_ipi_redirect,
MODULE_PARM_DESC(h_ipi_redirect, "Redirect H_IPI wakeup to a free host core");
#endif
/* Maximum halt poll interval defaults to KVM_HALT_POLL_NS_DEFAULT */
static unsigned int halt_poll_max_ns = KVM_HALT_POLL_NS_DEFAULT;
module_param(halt_poll_max_ns, uint, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(halt_poll_max_ns, "Maximum halt poll time in ns");
/* Factor by which the vcore halt poll interval is grown, default is to double
*/
static unsigned int halt_poll_ns_grow = 2;
module_param(halt_poll_ns_grow, int, S_IRUGO);
MODULE_PARM_DESC(halt_poll_ns_grow, "Factor halt poll time is grown by");
/* Factor by which the vcore halt poll interval is shrunk, default is to reset
*/
static unsigned int halt_poll_ns_shrink;
module_param(halt_poll_ns_shrink, int, S_IRUGO);
MODULE_PARM_DESC(halt_poll_ns_shrink, "Factor halt poll time is shrunk by");
static void kvmppc_end_cede(struct kvm_vcpu *vcpu);
static int kvmppc_hv_setup_htab_rma(struct kvm_vcpu *vcpu);
@ -2617,8 +2600,8 @@ static void grow_halt_poll_ns(struct kvmppc_vcore *vc)
else
vc->halt_poll_ns *= halt_poll_ns_grow;
if (vc->halt_poll_ns > halt_poll_max_ns)
vc->halt_poll_ns = halt_poll_max_ns;
if (vc->halt_poll_ns > halt_poll_ns)
vc->halt_poll_ns = halt_poll_ns;
}
static void shrink_halt_poll_ns(struct kvmppc_vcore *vc)
@ -2728,15 +2711,15 @@ out:
}
/* Adjust poll time */
if (halt_poll_max_ns) {
if (halt_poll_ns) {
if (block_ns <= vc->halt_poll_ns)
;
/* We slept and blocked for longer than the max halt time */
else if (vc->halt_poll_ns && block_ns > halt_poll_max_ns)
else if (vc->halt_poll_ns && block_ns > halt_poll_ns)
shrink_halt_poll_ns(vc);
/* We slept and our poll time is too small */
else if (vc->halt_poll_ns < halt_poll_max_ns &&
block_ns < halt_poll_max_ns)
else if (vc->halt_poll_ns < halt_poll_ns &&
block_ns < halt_poll_ns)
grow_halt_poll_ns(vc);
} else
vc->halt_poll_ns = 0;