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s390x/mmu: Use ioctl for reading and writing from/to guest memory

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Add code to make use of the new ioctl for reading from / writing to
virtual guest memory. By using the ioctl, the memory accesses are now
protected with the so-called ipte-lock in the kernel.

[CH: moved error message into kvm_s390_mem_op()]
Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
This commit is contained in:
Thomas Huth 2015-02-06 15:54:58 +01:00 • committed by Cornelia Huck
parent f07177a559
commit a9bcd1b871
3 changed files with 54 additions and 0 deletions
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7
target-s390x/cpu.h
View file

@ -401,6 +401,8 @@ 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);
int kvm_s390_mem_op(S390CPU *cpu, vaddr addr, void *hostbuf, int len,
bool is_write);
int kvm_s390_get_clock(uint8_t *tod_high, uint64_t *tod_clock);
int kvm_s390_set_clock(uint8_t *tod_high, uint64_t *tod_clock);
#else
@ -418,6 +420,11 @@ static inline int kvm_s390_set_clock(uint8_t *tod_high, uint64_t *tod_low)
{
return -ENOSYS;
}
static inline int kvm_s390_mem_op(S390CPU *cpu, vaddr addr, void *hostbuf,
int len, bool is_write)
{
return -ENOSYS;
}
static inline void kvm_s390_access_exception(S390CPU *cpu, uint16_t code,
uint64_t te_code)
{