diff options
| -rw-r--r-- | arch/s390/include/asm/gmap.h | 1 | ||||
| -rw-r--r-- | arch/s390/include/asm/kvm_host.h | 2 | ||||
| -rw-r--r-- | arch/s390/kvm/kvm-s390.c | 8 | ||||
| -rw-r--r-- | arch/s390/mm/gmap.c | 11 |
4 files changed, 19 insertions, 3 deletions
diff --git a/arch/s390/include/asm/gmap.h b/arch/s390/include/asm/gmap.h index c67fb854705e..741ddba0bf11 100644 --- a/arch/s390/include/asm/gmap.h +++ b/arch/s390/include/asm/gmap.h @@ -94,6 +94,7 @@ void gmap_put(struct gmap *gmap); void gmap_enable(struct gmap *gmap); void gmap_disable(struct gmap *gmap); +struct gmap *gmap_get_enabled(void); int gmap_map_segment(struct gmap *gmap, unsigned long from, unsigned long to, unsigned long len); int gmap_unmap_segment(struct gmap *gmap, unsigned long to, unsigned long len); diff --git a/arch/s390/include/asm/kvm_host.h b/arch/s390/include/asm/kvm_host.h index 9eed5c18a61c..96bef30e2e33 100644 --- a/arch/s390/include/asm/kvm_host.h +++ b/arch/s390/include/asm/kvm_host.h @@ -551,6 +551,8 @@ struct kvm_vcpu_arch { struct hrtimer ckc_timer; struct kvm_s390_pgm_info pgm; struct gmap *gmap; + /* backup location for the currently enabled gmap when scheduled out */ + struct gmap *enabled_gmap; struct kvm_guestdbg_info_arch guestdbg; unsigned long pfault_token; unsigned long pfault_select; diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index 45a8316ba1eb..a890f7d20711 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -1719,7 +1719,7 @@ void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) save_access_regs(vcpu->arch.host_acrs); restore_access_regs(vcpu->run->s.regs.acrs); - gmap_enable(vcpu->arch.gmap); + gmap_enable(vcpu->arch.enabled_gmap); atomic_or(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); if (vcpu->arch.cputm_enabled && !is_vcpu_idle(vcpu)) __start_cpu_timer_accounting(vcpu); @@ -1732,7 +1732,8 @@ void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) if (vcpu->arch.cputm_enabled && !is_vcpu_idle(vcpu)) __stop_cpu_timer_accounting(vcpu); atomic_andnot(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); - gmap_disable(vcpu->arch.gmap); + vcpu->arch.enabled_gmap = gmap_get_enabled(); + gmap_disable(vcpu->arch.enabled_gmap); /* Save guest register state */ save_fpu_regs(); @@ -1781,7 +1782,8 @@ void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu) vcpu->arch.gmap = vcpu->kvm->arch.gmap; sca_add_vcpu(vcpu); } - + /* make vcpu_load load the right gmap on the first trigger */ + vcpu->arch.enabled_gmap = vcpu->arch.gmap; } static void kvm_s390_vcpu_crypto_setup(struct kvm_vcpu *vcpu) diff --git a/arch/s390/mm/gmap.c b/arch/s390/mm/gmap.c index 738d75495e56..af0ae6d7ac59 100644 --- a/arch/s390/mm/gmap.c +++ b/arch/s390/mm/gmap.c @@ -270,6 +270,17 @@ void gmap_disable(struct gmap *gmap) } EXPORT_SYMBOL_GPL(gmap_disable); +/** + * gmap_get_enabled - get a pointer to the currently enabled gmap + * + * Returns a pointer to the currently enabled gmap. 0 if none is enabled. + */ +struct gmap *gmap_get_enabled(void) +{ + return (struct gmap *) S390_lowcore.gmap; +} +EXPORT_SYMBOL_GPL(gmap_get_enabled); + /* * gmap_alloc_table is assumed to be called with mmap_sem held */ |