[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v3 3/6] xen/arm: read ACTLR on the pcpu where the vcpu will run
On big.LITTLE systems not all cores have the same ACTLR. Instead of reading ACTLR and setting v->arch.actlr in vcpu_initialise, do it later on the same pcpu where the vcpu will run. This way, assuming that the vcpu has been created with the right pcpu affinity, the guest will be able to read the right ACTLR value, matching the one of the physical cpu. Also move processor_vcpu_initialise(v) to continue_new_vcpu as it can modify v->arch.actlr. Signed-off-by: Stefano Stabellini <sstabellini@xxxxxxxxxx> Reviewed-by: Julien Grall <julien.grall@xxxxxxx> --- Changes in v2: - move processor_vcpu_initialise to continue_new_vcpu - remove inaccurate sentence from commit message --- xen/arch/arm/domain.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/xen/arch/arm/domain.c b/xen/arch/arm/domain.c index a74ff1c..5e76809 100644 --- a/xen/arch/arm/domain.c +++ b/xen/arch/arm/domain.c @@ -314,6 +314,9 @@ static void schedule_tail(struct vcpu *prev) static void continue_new_vcpu(struct vcpu *prev) { + current->arch.actlr = READ_SYSREG32(ACTLR_EL1); + processor_vcpu_initialise(current); + schedule_tail(prev); if ( is_idle_vcpu(current) ) @@ -540,12 +543,8 @@ int vcpu_initialise(struct vcpu *v) v->arch.vmpidr = MPIDR_SMP | vcpuid_to_vaffinity(v->vcpu_id); - v->arch.actlr = READ_SYSREG32(ACTLR_EL1); - v->arch.hcr_el2 = get_default_hcr_flags(); - processor_vcpu_initialise(v); - if ( (rc = vcpu_vgic_init(v)) != 0 ) goto fail; -- 1.9.1 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxxx https://lists.xenproject.org/mailman/listinfo/xen-devel
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