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kvm: make one_reg helpers available for everyone

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s390x introduced helper functions for getting/setting one_regs with
commit 860643bc. However, nothing about these is s390-specific.

Alexey Kardashevskiy had already posted a general version, so let's
merge the two patches and massage the code a bit.

CC: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Cornelia Huck 2014-05-09 10:06:46 +02:00 committed by Paolo Bonzini
parent 8e03c100a7
commit ada4135f84
4 changed files with 50 additions and 33 deletions
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20
include/sysemu/kvm.h
View file

@ -383,4 +383,24 @@ void kvm_init_irq_routing(KVMState *s);
* > 0: irq chip was created
*/
int kvm_arch_irqchip_create(KVMState *s);
/**
* kvm_set_one_reg - set a register value in KVM via KVM_SET_ONE_REG ioctl
* @id: The register ID
* @source: The pointer to the value to be set. It must point to a variable
* of the correct type/size for the register being accessed.
*
* Returns: 0 on success, or a negative errno on failure.
*/
int kvm_set_one_reg(CPUState *cs, uint64_t id, void *source);
/**
* kvm_get_one_reg - get a register value from KVM via KVM_GET_ONE_REG ioctl
* @id: The register ID
* @target: The pointer where the value is to be stored. It must point to a
* variable of the correct type/size for the register being accessed.
*
* Returns: 0 on success, or a negative errno on failure.
*/
int kvm_get_one_reg(CPUState *cs, uint64_t id, void *target);
#endif

28
kvm-all.c
View file

@ -2114,3 +2114,31 @@ int kvm_create_device(KVMState *s, uint64_t type, bool test)
return test ? 0 : create_dev.fd;
}
int kvm_set_one_reg(CPUState *cs, uint64_t id, void *source)
{
struct kvm_one_reg reg;
int r;
reg.id = id;
reg.addr = (uintptr_t) source;
r = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, &reg);
if (r) {
trace_kvm_failed_reg_set(id, strerror(r));
}
return r;
}
int kvm_get_one_reg(CPUState *cs, uint64_t id, void *target)
{
struct kvm_one_reg reg;
int r;
reg.id = id;
reg.addr = (uintptr_t) target;
r = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, &reg);
if (r) {
trace_kvm_failed_reg_get(id, strerror(r));
}
return r;
}

29
target-s390x/kvm.c
View file

@ -129,35 +129,6 @@ void kvm_arch_reset_vcpu(CPUState *cpu)
}
}
static int kvm_set_one_reg(CPUState *cs, uint64_t id, void *source)
{
struct kvm_one_reg reg;
int r;
reg.id = id;
reg.addr = (uint64_t) source;
r = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, &reg);
if (r) {
trace_kvm_failed_reg_set(id, strerror(errno));
}
return r;
}
static int kvm_get_one_reg(CPUState *cs, uint64_t id, void *target)
{
struct kvm_one_reg reg;
int r;
reg.id = id;
reg.addr = (uint64_t) target;
r = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, &reg);
if (r) {
trace_kvm_failed_reg_get(id, strerror(errno));
}
return r;
}
int kvm_arch_put_registers(CPUState *cs, int level)
{
S390CPU *cpu = S390_CPU(cs);

6
trace-events
View file

@ -1230,6 +1230,8 @@ kvm_run_exit(int cpu_index, uint32_t reason) "cpu_index %d, reason %d"
kvm_device_ioctl(int fd, int type, void *arg) "dev fd %d, type 0x%x, arg %p"
kvm_failed_spr_set(int str, const char *msg) "Warning: Unable to set SPR %d to KVM: %s"
kvm_failed_spr_get(int str, const char *msg) "Warning: Unable to retrieve SPR %d from KVM: %s"
kvm_failed_reg_get(uint64_t id, const char *msg) "Warning: Unable to retrieve ONEREG %" PRIu64 " from KVM: %s"
kvm_failed_reg_set(uint64_t id, const char *msg) "Warning: Unable to set ONEREG %" PRIu64 " to KVM: %s"
# memory.c
memory_region_ops_read(void *mr, uint64_t addr, uint64_t value, unsigned size) "mr %p addr %#"PRIx64" value %#"PRIx64" size %u"
@ -1246,7 +1248,3 @@ xen_pv_mmio_write(uint64_t addr) "WARNING: write to Xen PV Device MMIO space (ad
# hw/pci/pci_host.c
pci_cfg_read(const char *dev, unsigned devid, unsigned fnid, unsigned offs, unsigned val) "%s %02u:%u @0x%x -> 0x%x"
pci_cfg_write(const char *dev, unsigned devid, unsigned fnid, unsigned offs, unsigned val) "%s %02u:%u @0x%x <- 0x%x"
# target-s390/kvm.c
kvm_failed_reg_get(uint64_t id, const char *msg) "Warning: Unable to retrieve ONEREG %" PRIu64 " from KVM: %s"
kvm_failed_reg_set(uint64_t id, const char *msg) "Warning: Unable to set ONEREG %" PRIu64 " to KVM: %s"