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s390x: Vector Register IOCTLs

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Handle the actual syncing of the vector registers with kernel space,
via the get/put register IOCTLs.

The vector registers that were introduced with the z13 overlay
the existing floating point registers.  FP registers 0-15 are
the high-halves of vector registers 0-15.  Thus, remove the
freg fields and replace them with the equivalent vector field
to avoid errors in duplication.  Moreover, synchronize either the
vector registers via kvm_sync_regs, or floating point registers
via the GET/SET FPU IOCTLs.

Signed-off-by: Eric Farman <farman@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
This commit is contained in:
Eric Farman 2014-08-18 15:33:39 -04:00 • committed by Cornelia Huck
parent c498d8e36e
commit fcb79802e0
4 changed files with 56 additions and 35 deletions
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49
target-s390x/kvm.c
View file

@ -337,15 +337,24 @@ int kvm_arch_put_registers(CPUState *cs, int level)
}
}
/* Floating point */
for (i = 0; i < 16; i++) {
fpu.fprs[i] = get_freg(env, i)->ll;
}
fpu.fpc = env->fpc;
if (can_sync_regs(cs, KVM_SYNC_VRS)) {
for (i = 0; i < 32; i++) {
cs->kvm_run->s.regs.vrs[i][0] = env->vregs[i][0].ll;
cs->kvm_run->s.regs.vrs[i][1] = env->vregs[i][1].ll;
}
cs->kvm_run->s.regs.fpc = env->fpc;
cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_VRS;
} else {
/* Floating point */
for (i = 0; i < 16; i++) {
fpu.fprs[i] = get_freg(env, i)->ll;
}
fpu.fpc = env->fpc;
r = kvm_vcpu_ioctl(cs, KVM_SET_FPU, &fpu);
if (r < 0) {
return r;
r = kvm_vcpu_ioctl(cs, KVM_SET_FPU, &fpu);
if (r < 0) {
return r;
}
}
/* Do we need to save more than that? */
@ -468,15 +477,23 @@ int kvm_arch_get_registers(CPUState *cs)
}
}
/* Floating point */
r = kvm_vcpu_ioctl(cs, KVM_GET_FPU, &fpu);
if (r < 0) {
return r;
/* Floating point and vector registers */
if (can_sync_regs(cs, KVM_SYNC_VRS)) {
for (i = 0; i < 32; i++) {
env->vregs[i][0].ll = cs->kvm_run->s.regs.vrs[i][0];
env->vregs[i][1].ll = cs->kvm_run->s.regs.vrs[i][1];
}
env->fpc = cs->kvm_run->s.regs.fpc;
} else {
r = kvm_vcpu_ioctl(cs, KVM_GET_FPU, &fpu);
if (r < 0) {
return r;
}
for (i = 0; i < 16; i++) {
get_freg(env, i)->ll = fpu.fprs[i];
}
env->fpc = fpu.fpc;
}
for (i = 0; i < 16; i++) {
get_freg(env, i)->ll = fpu.fprs[i];
}
env->fpc = fpu.fpc;
/* The prefix */
if (can_sync_regs(cs, KVM_SYNC_PREFIX)) {