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s390x/kvm: Add function for injecting pgm access exceptions 

Program access exceptions are defined to deliver a translation exception
code in the low-core. Add a function trigger_access_exception() that
generates the proper program interrupt on both KVM and non-KVM systems
and switch the existing code to use it.

Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
master
Thomas Huth 2015-02-12 18:09:30 +01:00 committed by Christian Borntraeger
parent 9d77309c9f
commit 801cdd355f
3 changed files with 33 additions and 6 deletions
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5
target-s390x/cpu.h
View File

@ -397,6 +397,7 @@ void kvm_s390_service_interrupt(uint32_t parm);
void kvm_s390_vcpu_interrupt(S390CPU *cpu, struct kvm_s390_irq *irq);
void kvm_s390_floating_interrupt(struct kvm_s390_irq *irq);
int kvm_s390_inject_flic(struct kvm_s390_irq *irq);
void kvm_s390_access_exception(S390CPU *cpu, uint16_t code, uint64_t te_code);
#else
static inline void kvm_s390_virtio_irq(int config_change, uint64_t token)
{
@ -404,6 +405,10 @@ static inline void kvm_s390_virtio_irq(int config_change, uint64_t token)
static inline void kvm_s390_service_interrupt(uint32_t parm)
{
}
static inline void kvm_s390_access_exception(S390CPU *cpu, uint16_t code,
uint64_t te_code)
{
}
#endif
S390CPU *s390_cpu_addr2state(uint16_t cpu_addr);
unsigned int s390_cpu_halt(S390CPU *cpu);

12
target-s390x/kvm.c
View File

@ -757,6 +757,18 @@ static void enter_pgmcheck(S390CPU *cpu, uint16_t code)
kvm_s390_vcpu_interrupt(cpu, &irq);
}
void kvm_s390_access_exception(S390CPU *cpu, uint16_t code, uint64_t te_code)
{
struct kvm_s390_irq irq = {
.type = KVM_S390_PROGRAM_INT,
.u.pgm.code = code,
.u.pgm.trans_exc_code = te_code,
.u.pgm.exc_access_id = te_code & 3,
};
kvm_s390_vcpu_interrupt(cpu, &irq);
}
static int kvm_sclp_service_call(S390CPU *cpu, struct kvm_run *run,
uint16_t ipbh0)
{

22
target-s390x/mmu_helper.c
View File

@ -46,10 +46,23 @@
#define FS_READ 0x800
#define FS_WRITE 0x400
static void trigger_access_exception(CPUS390XState *env, uint32_t type,
uint32_t ilen, uint64_t tec)
{
S390CPU *cpu = s390_env_get_cpu(env);
if (kvm_enabled()) {
kvm_s390_access_exception(cpu, type, tec);
} else {
CPUState *cs = CPU(cpu);
stq_phys(cs->as, env->psa + offsetof(LowCore, trans_exc_code), tec);
trigger_pgm_exception(env, type, ilen);
}
}
static void trigger_prot_fault(CPUS390XState *env, target_ulong vaddr,
uint64_t asc, int rw, bool exc)
{
CPUState *cs = CPU(s390_env_get_cpu(env));
uint64_t tec;
tec = vaddr | (rw == 1 ? FS_WRITE : FS_READ) | 4 | asc >> 46;
@ -60,14 +73,12 @@ static void trigger_prot_fault(CPUS390XState *env, target_ulong vaddr,
return;
}
stq_phys(cs->as, env->psa + offsetof(LowCore, trans_exc_code), tec);
trigger_pgm_exception(env, PGM_PROTECTION, ILEN_LATER_INC);
trigger_access_exception(env, PGM_PROTECTION, ILEN_LATER_INC, tec);
}
static void trigger_page_fault(CPUS390XState *env, target_ulong vaddr,
uint32_t type, uint64_t asc, int rw, bool exc)
{
CPUState *cs = CPU(s390_env_get_cpu(env));
int ilen = ILEN_LATER;
uint64_t tec;
@ -84,8 +95,7 @@ static void trigger_page_fault(CPUS390XState *env, target_ulong vaddr,
ilen = 2;
}
stq_phys(cs->as, env->psa + offsetof(LowCore, trans_exc_code), tec);
trigger_pgm_exception(env, type, ilen);
trigger_access_exception(env, type, ilen, tec);
}
/**