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s390x/kvm: synchronize guest floating point registers

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Add code to kvm_arch_get_registers and kvm_arch_put_registers to
save/restore floating point registers. This missing sync was
unnoticed until migration of userspace that uses fprs.

Signed-off-by: Jason J. Herne <jjherne@us.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
[Update patch to latest upstream]
Cc: qemu-stable@nongnu.org
Reviewed-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
This commit is contained in:
Jason J. Herne 2012-11-29 10:09:42 -05:00 committed by Cornelia Huck
parent ab6d3749c4
commit 85ad6230b3
1 changed files with 23 additions and 0 deletions
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23
target-s390x/kvm.c
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@ -207,6 +207,7 @@ int kvm_arch_put_registers(CPUState *cs, int level)
CPUS390XState *env = &cpu->env;
struct kvm_sregs sregs;
struct kvm_regs regs;
struct kvm_fpu fpu;
int r;
int i;
@ -229,6 +230,17 @@ int kvm_arch_put_registers(CPUState *cs, int level)
}
}
/* Floating point */
for (i = 0; i < 16; i++) {
fpu.fprs[i] = env->fregs[i].ll;
}
fpu.fpc = env->fpc;
r = kvm_vcpu_ioctl(cs, KVM_SET_FPU, &fpu);
if (r < 0) {
return r;
}
/* Do we need to save more than that? */
if (level == KVM_PUT_RUNTIME_STATE) {
return 0;
@ -296,6 +308,7 @@ int kvm_arch_get_registers(CPUState *cs)
CPUS390XState *env = &cpu->env;
struct kvm_sregs sregs;
struct kvm_regs regs;
struct kvm_fpu fpu;
int i, r;
/* get the PSW */
@ -336,6 +349,16 @@ int kvm_arch_get_registers(CPUState *cs)
}
}
/* Floating point */
r = kvm_vcpu_ioctl(cs, KVM_GET_FPU, &fpu);
if (r < 0) {
return r;
}
for (i = 0; i < 16; i++) {
env->fregs[i].ll = fpu.fprs[i];
}
env->fpc = fpu.fpc;
/* The prefix */
if (cap_sync_regs && cs->kvm_run->kvm_valid_regs & KVM_SYNC_PREFIX) {
env->psa = cs->kvm_run->s.regs.prefix;