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[S390] cleanup facility list handling

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Store the facility list once at system startup with stfl/stfle and
reuse the result for all facility tests.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Martin Schwidefsky
2010-10-25 16:10:51 +02:00
committed by Martin Schwidefsky
parent eca577ef59
commit 14375bc4eb
12 changed files with 66 additions and 74 deletions
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4
arch/s390/kvm/priv.c
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@@ -154,12 +154,12 @@ static int handle_chsc(struct kvm_vcpu *vcpu)
static int handle_stfl(struct kvm_vcpu *vcpu)
{
unsigned int facility_list = stfl();
unsigned int facility_list;
int rc;
vcpu->stat.instruction_stfl++;
/* only pass the facility bits, which we can handle */
facility_list &= 0xff00fff3;
facility_list = S390_lowcore.stfl_fac_list & 0xff00fff3;
rc = copy_to_guest(vcpu, offsetof(struct _lowcore, stfl_fac_list),
&facility_list, sizeof(facility_list));