[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v18 04/13] x86/hvm: Introduce hvm_save_cpu_xsave_states_one
This is used to save data from a single instance. Signed-off-by: Alexandru Isaila <aisaila@xxxxxxxxxxxxxxx> Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx> --- Changes since V14: - Remove err init - Add blank line ahead of return - Move xsave_enabled() check to the save_one func. --- xen/arch/x86/hvm/hvm.c | 47 +++++++++++++++++++++++++++++------------------ 1 file changed, 29 insertions(+), 18 deletions(-) diff --git a/xen/arch/x86/hvm/hvm.c b/xen/arch/x86/hvm/hvm.c index 333c342..5b0820e 100644 --- a/xen/arch/x86/hvm/hvm.c +++ b/xen/arch/x86/hvm/hvm.c @@ -1187,35 +1187,46 @@ HVM_REGISTER_SAVE_RESTORE(CPU, hvm_save_cpu_ctxt, hvm_load_cpu_ctxt, save_area) + \ xstate_ctxt_size(xcr0)) -static int hvm_save_cpu_xsave_states(struct domain *d, hvm_domain_context_t *h) +static int hvm_save_cpu_xsave_states_one(struct vcpu *v, hvm_domain_context_t *h) { - struct vcpu *v; struct hvm_hw_cpu_xsave *ctxt; + unsigned int size = HVM_CPU_XSAVE_SIZE(v->arch.xcr0_accum); + int err; - if ( !cpu_has_xsave ) + if ( !cpu_has_xsave || !xsave_enabled(v) ) return 0; /* do nothing */ - for_each_vcpu ( d, v ) - { - unsigned int size = HVM_CPU_XSAVE_SIZE(v->arch.xcr0_accum); + err = _hvm_init_entry(h, CPU_XSAVE_CODE, v->vcpu_id, size); + if ( err ) + return err; - if ( !xsave_enabled(v) ) - continue; - if ( _hvm_init_entry(h, CPU_XSAVE_CODE, v->vcpu_id, size) ) - return 1; - ctxt = (struct hvm_hw_cpu_xsave *)&h->data[h->cur]; - h->cur += size; + ctxt = (struct hvm_hw_cpu_xsave *)&h->data[h->cur]; + h->cur += size; + ctxt->xfeature_mask = xfeature_mask; + ctxt->xcr0 = v->arch.xcr0; + ctxt->xcr0_accum = v->arch.xcr0_accum; - ctxt->xfeature_mask = xfeature_mask; - ctxt->xcr0 = v->arch.xcr0; - ctxt->xcr0_accum = v->arch.xcr0_accum; - expand_xsave_states(v, &ctxt->save_area, - size - offsetof(typeof(*ctxt), save_area)); - } + expand_xsave_states(v, &ctxt->save_area, + size - offsetof(typeof(*ctxt), save_area)); return 0; } +static int hvm_save_cpu_xsave_states(struct domain *d, hvm_domain_context_t *h) +{ + struct vcpu *v; + int err = 0; + + for_each_vcpu ( d, v ) + { + err = hvm_save_cpu_xsave_states_one(v, h); + if ( err ) + break; + } + + return err; +} + /* * Structure layout conformity checks, documenting correctness of the cast in * the invocation of validate_xstate() below. -- 2.7.4 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxxx https://lists.xenproject.org/mailman/listinfo/xen-devel
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