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[S390] remove kvm mmu reload on s390

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This patch removes the mmu reload logic for kvm on s390. Via Martin's
new gmap interface, we can safely add or remove memory slots while
guest CPUs are in-flight. Thus, the mmu reload logic is not needed
anymore.

Signed-off-by: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Carsten Otte 2011-07-24 10:48:23 +02:00 committed by Martin Schwidefsky
parent 092670cd90
commit f7850c9288
2 changed files with 2 additions and 19 deletions
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17
arch/s390/kvm/kvm-s390.c
View File

@ -294,7 +294,6 @@ static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu)
int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
{
atomic_set(&vcpu->arch.sie_block->cpuflags, CPUSTAT_ZARCH | CPUSTAT_SM);
set_bit(KVM_REQ_MMU_RELOAD, &vcpu->requests);
vcpu->arch.sie_block->ecb = 6;
vcpu->arch.sie_block->eca = 0xC1002001U;
vcpu->arch.sie_block->fac = (int) (long) facilities;
@ -485,10 +484,6 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
sigset_t sigsaved;
rerun_vcpu:
if (vcpu->requests)
if (test_and_clear_bit(KVM_REQ_MMU_RELOAD, &vcpu->requests))
kvm_s390_vcpu_set_mem(vcpu);
if (vcpu->sigset_active)
sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
@ -701,21 +696,13 @@ void kvm_arch_commit_memory_region(struct kvm *kvm,
struct kvm_memory_slot old,
int user_alloc)
{
int i, rc;
struct kvm_vcpu *vcpu;
int rc;
rc = gmap_map_segment(kvm->arch.gmap, mem->userspace_addr,
mem->guest_phys_addr, mem->memory_size);
if (rc)
return;
/* request update of sie control block for all available vcpus */
kvm_for_each_vcpu(i, vcpu, kvm) {
if (test_and_set_bit(KVM_REQ_MMU_RELOAD, &vcpu->requests))
continue;
kvm_s390_inject_sigp_stop(vcpu, ACTION_RELOADVCPU_ON_STOP);
}
printk(KERN_WARNING "kvm-s390: failed to commit memory region\n");
return;
}

4
arch/s390/kvm/kvm-s390.h
View File

@ -58,10 +58,6 @@ int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu,
int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code);
int kvm_s390_inject_sigp_stop(struct kvm_vcpu *vcpu, int action);
static inline void kvm_s390_vcpu_set_mem(struct kvm_vcpu *vcpu)
{
}
/* implemented in priv.c */
int kvm_s390_handle_b2(struct kvm_vcpu *vcpu);
int kvm_s390_handle_e5(struct kvm_vcpu *vcpu);