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Diffstat (limited to 'arch/s390/kvm/kvm-s390.c')
-rw-r--r--arch/s390/kvm/kvm-s390.c78
1 files changed, 33 insertions, 45 deletions
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index 90d9d1ba258b..07ced89740d7 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -1,7 +1,7 @@
/*
* s390host.c -- hosting zSeries kernel virtual machines
*
- * Copyright IBM Corp. 2008
+ * Copyright IBM Corp. 2008,2009
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License (version 2 only)
@@ -10,6 +10,7 @@
* Author(s): Carsten Otte <cotte@de.ibm.com>
* Christian Borntraeger <borntraeger@de.ibm.com>
* Heiko Carstens <heiko.carstens@de.ibm.com>
+ * Christian Ehrhardt <ehrhardt@de.ibm.com>
*/
#include <linux/compiler.h>
@@ -210,13 +211,17 @@ void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
static void kvm_free_vcpus(struct kvm *kvm)
{
unsigned int i;
+ struct kvm_vcpu *vcpu;
- for (i = 0; i < KVM_MAX_VCPUS; ++i) {
- if (kvm->vcpus[i]) {
- kvm_arch_vcpu_destroy(kvm->vcpus[i]);
- kvm->vcpus[i] = NULL;
- }
- }
+ kvm_for_each_vcpu(i, vcpu, kvm)
+ kvm_arch_vcpu_destroy(vcpu);
+
+ mutex_lock(&kvm->lock);
+ for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
+ kvm->vcpus[i] = NULL;
+
+ atomic_set(&kvm->online_vcpus, 0);
+ mutex_unlock(&kvm->lock);
}
void kvm_arch_sync_events(struct kvm *kvm)
@@ -278,16 +283,10 @@ static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu)
vcpu->arch.sie_block->gbea = 1;
}
-/* The current code can have up to 256 pages for virtio */
-#define VIRTIODESCSPACE (256ul * 4096ul)
-
int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
{
atomic_set(&vcpu->arch.sie_block->cpuflags, CPUSTAT_ZARCH);
- vcpu->arch.sie_block->gmslm = vcpu->kvm->arch.guest_memsize +
- vcpu->kvm->arch.guest_origin +
- VIRTIODESCSPACE - 1ul;
- vcpu->arch.sie_block->gmsor = vcpu->kvm->arch.guest_origin;
+ set_bit(KVM_REQ_MMU_RELOAD, &vcpu->requests);
vcpu->arch.sie_block->ecb = 2;
vcpu->arch.sie_block->eca = 0xC1002001U;
vcpu->arch.sie_block->fac = (int) (long) facilities;
@@ -319,8 +318,6 @@ struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm,
BUG_ON(!kvm->arch.sca);
if (!kvm->arch.sca->cpu[id].sda)
kvm->arch.sca->cpu[id].sda = (__u64) vcpu->arch.sie_block;
- else
- BUG_ON(!kvm->vcpus[id]); /* vcpu does already exist */
vcpu->arch.sie_block->scaoh = (__u32)(((__u64)kvm->arch.sca) >> 32);
vcpu->arch.sie_block->scaol = (__u32)(__u64)kvm->arch.sca;
@@ -490,9 +487,15 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
vcpu_load(vcpu);
+rerun_vcpu:
+ if (vcpu->requests)
+ if (test_and_clear_bit(KVM_REQ_MMU_RELOAD, &vcpu->requests))
+ kvm_s390_vcpu_set_mem(vcpu);
+
/* verify, that memory has been registered */
- if (!vcpu->kvm->arch.guest_memsize) {
+ if (!vcpu->arch.sie_block->gmslm) {
vcpu_put(vcpu);
+ VCPU_EVENT(vcpu, 3, "%s", "no memory registered to run vcpu");
return -EINVAL;
}
@@ -509,6 +512,7 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
vcpu->arch.sie_block->gpsw.addr = kvm_run->s390_sieic.addr;
break;
case KVM_EXIT_UNKNOWN:
+ case KVM_EXIT_INTR:
case KVM_EXIT_S390_RESET:
break;
default:
@@ -522,8 +526,13 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
rc = kvm_handle_sie_intercept(vcpu);
} while (!signal_pending(current) && !rc);
- if (signal_pending(current) && !rc)
+ if (rc == SIE_INTERCEPT_RERUNVCPU)
+ goto rerun_vcpu;
+
+ if (signal_pending(current) && !rc) {
+ kvm_run->exit_reason = KVM_EXIT_INTR;
rc = -EINTR;
+ }
if (rc == -ENOTSUPP) {
/* intercept cannot be handled in-kernel, prepare kvm-run */
@@ -676,6 +685,7 @@ int kvm_arch_set_memory_region(struct kvm *kvm,
int user_alloc)
{
int i;
+ struct kvm_vcpu *vcpu;
/* A few sanity checks. We can have exactly one memory slot which has
to start at guest virtual zero and which has to be located at a
@@ -684,7 +694,7 @@ int kvm_arch_set_memory_region(struct kvm *kvm,
vmas. It is okay to mmap() and munmap() stuff in this slot after
doing this call at any time */
- if (mem->slot || kvm->arch.guest_memsize)
+ if (mem->slot)
return -EINVAL;
if (mem->guest_phys_addr)
@@ -699,36 +709,14 @@ int kvm_arch_set_memory_region(struct kvm *kvm,
if (!user_alloc)
return -EINVAL;
- /* lock all vcpus */
- for (i = 0; i < KVM_MAX_VCPUS; ++i) {
- if (!kvm->vcpus[i])
+ /* 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;
- if (!mutex_trylock(&kvm->vcpus[i]->mutex))
- goto fail_out;
- }
-
- kvm->arch.guest_origin = mem->userspace_addr;
- kvm->arch.guest_memsize = mem->memory_size;
-
- /* update sie control blocks, and unlock all vcpus */
- for (i = 0; i < KVM_MAX_VCPUS; ++i) {
- if (kvm->vcpus[i]) {
- kvm->vcpus[i]->arch.sie_block->gmsor =
- kvm->arch.guest_origin;
- kvm->vcpus[i]->arch.sie_block->gmslm =
- kvm->arch.guest_memsize +
- kvm->arch.guest_origin +
- VIRTIODESCSPACE - 1ul;
- mutex_unlock(&kvm->vcpus[i]->mutex);
- }
+ kvm_s390_inject_sigp_stop(vcpu, ACTION_RELOADVCPU_ON_STOP);
}
return 0;
-
-fail_out:
- for (; i >= 0; i--)
- mutex_unlock(&kvm->vcpus[i]->mutex);
- return -EINVAL;
}
void kvm_arch_flush_shadow(struct kvm *kvm)