[PATCH v3 06/11] s390/kvm: Stop using gmap_{en,dis}able()

Claudio Imbrenda
2024-10-15T16:43:33Z

Stop using gmap_enable(), gmap_disable(), gmap_get_enabled().

The correct guest ASCE is passed as a parameter of sie64a(), there is
no need to save the current gmap in lowcore.

Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Acked-by: Steffen Eiden <seiden@linux.ibm.com>
---
arch/s390/kvm/kvm-s390.c | 7 +------
arch/s390/kvm/vsie.c | 4 +---
2 files changed, 2 insertions(+), 9 deletions(-)

diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index cfe3f8182aa5..df778a4a011d 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -3719,7 +3719,6 @@ __u64 kvm_s390_get_cpu_timer(struct kvm_vcpu *vcpu)
void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
{

- gmap_enable(vcpu->arch.enabled_gmap);
kvm_s390_set_cpuflags(vcpu, CPUSTAT_RUNNING);
if (vcpu->arch.cputm_enabled && !is_vcpu_idle(vcpu))
__start_cpu_timer_accounting(vcpu);
@@ -3732,8 +3731,6 @@ void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
if (vcpu->arch.cputm_enabled && !is_vcpu_idle(vcpu))
__stop_cpu_timer_accounting(vcpu);
kvm_s390_clear_cpuflags(vcpu, CPUSTAT_RUNNING);
- vcpu->arch.enabled_gmap = gmap_get_enabled();
- gmap_disable(vcpu->arch.enabled_gmap);

}

@@ -3751,8 +3748,6 @@ void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
}
if (test_kvm_facility(vcpu->kvm, 74) || vcpu->kvm->arch.user_instr0)
vcpu->arch.sie_block->ictl |= ICTL_OPEREXC;
- /* make vcpu_load load the right gmap on the first trigger */
- vcpu->arch.enabled_gmap = vcpu->arch.gmap;
}

static bool kvm_has_pckmo_subfunc(struct kvm *kvm, unsigned long nr)
@@ -4891,7 +4886,7 @@ static int __vcpu_run(struct kvm_vcpu *vcpu)
}
exit_reason = sie64a(vcpu->arch.sie_block,
vcpu->run->s.regs.gprs,
- gmap_get_enabled()->asce);
+ vcpu->arch.gmap->asce);
if (kvm_s390_pv_cpu_is_protected(vcpu)) {
memcpy(vcpu->run->s.regs.gprs,
sie_page->pv_grregs,
diff --git a/arch/s390/kvm/vsie.c b/arch/s390/kvm/vsie.c
index 35e7dd882148..d03f95e528fe 100644
--- a/arch/s390/kvm/vsie.c
+++ b/arch/s390/kvm/vsie.c
@@ -1151,7 +1151,7 @@ static int do_vsie_run(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page)
current->thread.gmap_int_code = 0;
barrier();
if (!kvm_s390_vcpu_sie_inhibited(vcpu))
- rc = sie64a(scb_s, vcpu->run->s.regs.gprs, gmap_get_enabled()->asce);
+ rc = sie64a(scb_s, vcpu->run->s.regs.gprs, vsie_page->gmap->asce);
barrier();
vcpu->arch.sie_block->prog0c &= ~PROG_IN_SIE;

@@ -1296,10 +1296,8 @@ static int vsie_run(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page)
if (!rc)
rc = map_prefix(vcpu, vsie_page);
if (!rc) {
- gmap_enable(vsie_page->gmap);
update_intervention_requests(vsie_page);
rc = do_vsie_run(vcpu, vsie_page);
- gmap_enable(vcpu->arch.gmap);
}
atomic_andnot(PROG_BLOCK_SIE, &scb_s->prog20);

--
2.47.0