#include <linux/slab.h>
#include <linux/timer.h>
#include <linux/vmalloc.h>
+#include <linux/bitmap.h>
#include <asm/asm-offsets.h>
#include <asm/lowcore.h>
#include <asm/etr.h>
#include <asm/switch_to.h>
#include <asm/isc.h>
#include <asm/sclp.h>
+#include <asm/cpacf.h>
+#include <asm/etr.h>
#include "kvm-s390.h"
#include "gaccess.h"
{ "exit_instruction", VCPU_STAT(exit_instruction) },
{ "exit_program_interruption", VCPU_STAT(exit_program_interruption) },
{ "exit_instr_and_program_int", VCPU_STAT(exit_instr_and_program) },
+ { "exit_operation_exception", VCPU_STAT(exit_operation_exception) },
{ "halt_successful_poll", VCPU_STAT(halt_successful_poll) },
{ "halt_attempted_poll", VCPU_STAT(halt_attempted_poll) },
{ "halt_poll_invalid", VCPU_STAT(halt_poll_invalid) },
{ "instruction_stsi", VCPU_STAT(instruction_stsi) },
{ "instruction_stfl", VCPU_STAT(instruction_stfl) },
{ "instruction_tprot", VCPU_STAT(instruction_tprot) },
+ { "instruction_sthyi", VCPU_STAT(instruction_sthyi) },
{ "instruction_sigp_sense", VCPU_STAT(instruction_sigp_sense) },
{ "instruction_sigp_sense_running", VCPU_STAT(instruction_sigp_sense_running) },
{ "instruction_sigp_external_call", VCPU_STAT(instruction_sigp_external_call) },
return ARRAY_SIZE(kvm_s390_fac_list_mask);
}
+/* available cpu features supported by kvm */
+static DECLARE_BITMAP(kvm_s390_available_cpu_feat, KVM_S390_VM_CPU_FEAT_NR_BITS);
+/* available subfunctions indicated via query / "test bit" */
+static struct kvm_s390_vm_cpu_subfunc kvm_s390_available_subfunc;
+
static struct gmap_notifier gmap_notifier;
debug_info_t *kvm_s390_dbf;
return 0;
}
-static void kvm_gmap_notifier(struct gmap *gmap, unsigned long address);
+static void kvm_gmap_notifier(struct gmap *gmap, unsigned long start,
+ unsigned long end);
/*
* This callback is executed during stop_machine(). All CPUs are therefore
&kvm_clock_notifier);
}
+static void allow_cpu_feat(unsigned long nr)
+{
+ set_bit_inv(nr, kvm_s390_available_cpu_feat);
+}
+
+static inline int plo_test_bit(unsigned char nr)
+{
+ register unsigned long r0 asm("0") = (unsigned long) nr | 0x100;
+ int cc = 3; /* subfunction not available */
+
+ asm volatile(
+ /* Parameter registers are ignored for "test bit" */
+ " plo 0,0,0,0(0)\n"
+ " ipm %0\n"
+ " srl %0,28\n"
+ : "=d" (cc)
+ : "d" (r0)
+ : "cc");
+ return cc == 0;
+}
+
+static void kvm_s390_cpu_feat_init(void)
+{
+ int i;
+
+ for (i = 0; i < 256; ++i) {
+ if (plo_test_bit(i))
+ kvm_s390_available_subfunc.plo[i >> 3] |= 0x80 >> (i & 7);
+ }
+
+ if (test_facility(28)) /* TOD-clock steering */
+ etr_ptff(kvm_s390_available_subfunc.ptff, ETR_PTFF_QAF);
+
+ if (test_facility(17)) { /* MSA */
+ __cpacf_query(CPACF_KMAC, kvm_s390_available_subfunc.kmac);
+ __cpacf_query(CPACF_KMC, kvm_s390_available_subfunc.kmc);
+ __cpacf_query(CPACF_KM, kvm_s390_available_subfunc.km);
+ __cpacf_query(CPACF_KIMD, kvm_s390_available_subfunc.kimd);
+ __cpacf_query(CPACF_KLMD, kvm_s390_available_subfunc.klmd);
+ }
+ if (test_facility(76)) /* MSA3 */
+ __cpacf_query(CPACF_PCKMO, kvm_s390_available_subfunc.pckmo);
+ if (test_facility(77)) { /* MSA4 */
+ __cpacf_query(CPACF_KMCTR, kvm_s390_available_subfunc.kmctr);
+ __cpacf_query(CPACF_KMF, kvm_s390_available_subfunc.kmf);
+ __cpacf_query(CPACF_KMO, kvm_s390_available_subfunc.kmo);
+ __cpacf_query(CPACF_PCC, kvm_s390_available_subfunc.pcc);
+ }
+ if (test_facility(57)) /* MSA5 */
+ __cpacf_query(CPACF_PPNO, kvm_s390_available_subfunc.ppno);
+
+ if (MACHINE_HAS_ESOP)
+ allow_cpu_feat(KVM_S390_VM_CPU_FEAT_ESOP);
+}
+
int kvm_arch_init(void *opaque)
{
kvm_s390_dbf = debug_register("kvm-trace", 32, 1, 7 * sizeof(long));
return -ENOMEM;
}
+ kvm_s390_cpu_feat_init();
+
/* Register floating interrupt controller interface. */
return kvm_register_device_ops(&kvm_flic_ops, KVM_DEV_TYPE_FLIC);
}
break;
case KVM_CAP_NR_VCPUS:
case KVM_CAP_MAX_VCPUS:
- r = sclp.has_esca ? KVM_S390_ESCA_CPU_SLOTS
- : KVM_S390_BSCA_CPU_SLOTS;
+ r = KVM_S390_BSCA_CPU_SLOTS;
+ if (sclp.has_esca && sclp.has_64bscao)
+ r = KVM_S390_ESCA_CPU_SLOTS;
break;
case KVM_CAP_NR_MEMSLOTS:
r = KVM_USER_MEM_SLOTS;
break;
case KVM_CAP_S390_VECTOR_REGISTERS:
mutex_lock(&kvm->lock);
- if (atomic_read(&kvm->online_vcpus)) {
+ if (kvm->created_vcpus) {
r = -EBUSY;
} else if (MACHINE_HAS_VX) {
set_kvm_facility(kvm->arch.model.fac_mask, 129);
case KVM_CAP_S390_RI:
r = -EINVAL;
mutex_lock(&kvm->lock);
- if (atomic_read(&kvm->online_vcpus)) {
+ if (kvm->created_vcpus) {
r = -EBUSY;
} else if (test_facility(64)) {
set_kvm_facility(kvm->arch.model.fac_mask, 64);
unsigned int idx;
switch (attr->attr) {
case KVM_S390_VM_MEM_ENABLE_CMMA:
- /* enable CMMA only for z10 and later (EDAT_1) */
- ret = -EINVAL;
- if (!MACHINE_IS_LPAR || !MACHINE_HAS_EDAT1)
+ ret = -ENXIO;
+ if (!sclp.has_cmma)
break;
ret = -EBUSY;
VM_EVENT(kvm, 3, "%s", "ENABLE: CMMA support");
mutex_lock(&kvm->lock);
- if (atomic_read(&kvm->online_vcpus) == 0) {
+ if (!kvm->created_vcpus) {
kvm->arch.use_cmma = 1;
ret = 0;
}
mutex_unlock(&kvm->lock);
break;
case KVM_S390_VM_MEM_CLR_CMMA:
+ ret = -ENXIO;
+ if (!sclp.has_cmma)
+ break;
ret = -EINVAL;
if (!kvm->arch.use_cmma)
break;
ret = -EBUSY;
mutex_lock(&kvm->lock);
- if (atomic_read(&kvm->online_vcpus) == 0) {
+ if (!kvm->created_vcpus) {
/* gmap_alloc will round the limit up */
struct gmap *new = gmap_alloc(current->mm, new_limit);
int ret = 0;
mutex_lock(&kvm->lock);
- if (atomic_read(&kvm->online_vcpus)) {
+ if (kvm->created_vcpus) {
ret = -EBUSY;
goto out;
}
return ret;
}
+static int kvm_s390_set_processor_feat(struct kvm *kvm,
+ struct kvm_device_attr *attr)
+{
+ struct kvm_s390_vm_cpu_feat data;
+ int ret = -EBUSY;
+
+ if (copy_from_user(&data, (void __user *)attr->addr, sizeof(data)))
+ return -EFAULT;
+ if (!bitmap_subset((unsigned long *) data.feat,
+ kvm_s390_available_cpu_feat,
+ KVM_S390_VM_CPU_FEAT_NR_BITS))
+ return -EINVAL;
+
+ mutex_lock(&kvm->lock);
+ if (!atomic_read(&kvm->online_vcpus)) {
+ bitmap_copy(kvm->arch.cpu_feat, (unsigned long *) data.feat,
+ KVM_S390_VM_CPU_FEAT_NR_BITS);
+ ret = 0;
+ }
+ mutex_unlock(&kvm->lock);
+ return ret;
+}
+
+static int kvm_s390_set_processor_subfunc(struct kvm *kvm,
+ struct kvm_device_attr *attr)
+{
+ /*
+ * Once supported by kernel + hw, we have to store the subfunctions
+ * in kvm->arch and remember that user space configured them.
+ */
+ return -ENXIO;
+}
+
static int kvm_s390_set_cpu_model(struct kvm *kvm, struct kvm_device_attr *attr)
{
int ret = -ENXIO;
case KVM_S390_VM_CPU_PROCESSOR:
ret = kvm_s390_set_processor(kvm, attr);
break;
+ case KVM_S390_VM_CPU_PROCESSOR_FEAT:
+ ret = kvm_s390_set_processor_feat(kvm, attr);
+ break;
+ case KVM_S390_VM_CPU_PROCESSOR_SUBFUNC:
+ ret = kvm_s390_set_processor_subfunc(kvm, attr);
+ break;
}
return ret;
}
return ret;
}
+static int kvm_s390_get_processor_feat(struct kvm *kvm,
+ struct kvm_device_attr *attr)
+{
+ struct kvm_s390_vm_cpu_feat data;
+
+ bitmap_copy((unsigned long *) data.feat, kvm->arch.cpu_feat,
+ KVM_S390_VM_CPU_FEAT_NR_BITS);
+ if (copy_to_user((void __user *)attr->addr, &data, sizeof(data)))
+ return -EFAULT;
+ return 0;
+}
+
+static int kvm_s390_get_machine_feat(struct kvm *kvm,
+ struct kvm_device_attr *attr)
+{
+ struct kvm_s390_vm_cpu_feat data;
+
+ bitmap_copy((unsigned long *) data.feat,
+ kvm_s390_available_cpu_feat,
+ KVM_S390_VM_CPU_FEAT_NR_BITS);
+ if (copy_to_user((void __user *)attr->addr, &data, sizeof(data)))
+ return -EFAULT;
+ return 0;
+}
+
+static int kvm_s390_get_processor_subfunc(struct kvm *kvm,
+ struct kvm_device_attr *attr)
+{
+ /*
+ * Once we can actually configure subfunctions (kernel + hw support),
+ * we have to check if they were already set by user space, if so copy
+ * them from kvm->arch.
+ */
+ return -ENXIO;
+}
+
+static int kvm_s390_get_machine_subfunc(struct kvm *kvm,
+ struct kvm_device_attr *attr)
+{
+ if (copy_to_user((void __user *)attr->addr, &kvm_s390_available_subfunc,
+ sizeof(struct kvm_s390_vm_cpu_subfunc)))
+ return -EFAULT;
+ return 0;
+}
static int kvm_s390_get_cpu_model(struct kvm *kvm, struct kvm_device_attr *attr)
{
int ret = -ENXIO;
case KVM_S390_VM_CPU_MACHINE:
ret = kvm_s390_get_machine(kvm, attr);
break;
+ case KVM_S390_VM_CPU_PROCESSOR_FEAT:
+ ret = kvm_s390_get_processor_feat(kvm, attr);
+ break;
+ case KVM_S390_VM_CPU_MACHINE_FEAT:
+ ret = kvm_s390_get_machine_feat(kvm, attr);
+ break;
+ case KVM_S390_VM_CPU_PROCESSOR_SUBFUNC:
+ ret = kvm_s390_get_processor_subfunc(kvm, attr);
+ break;
+ case KVM_S390_VM_CPU_MACHINE_SUBFUNC:
+ ret = kvm_s390_get_machine_subfunc(kvm, attr);
+ break;
}
return ret;
}
switch (attr->attr) {
case KVM_S390_VM_MEM_ENABLE_CMMA:
case KVM_S390_VM_MEM_CLR_CMMA:
+ ret = sclp.has_cmma ? 0 : -ENXIO;
+ break;
case KVM_S390_VM_MEM_LIMIT_SIZE:
ret = 0;
break;
switch (attr->attr) {
case KVM_S390_VM_CPU_PROCESSOR:
case KVM_S390_VM_CPU_MACHINE:
+ case KVM_S390_VM_CPU_PROCESSOR_FEAT:
+ case KVM_S390_VM_CPU_MACHINE_FEAT:
+ case KVM_S390_VM_CPU_MACHINE_SUBFUNC:
ret = 0;
break;
+ /* configuring subfunctions is not supported yet */
+ case KVM_S390_VM_CPU_PROCESSOR_SUBFUNC:
default:
ret = -ENXIO;
break;
{
uint8_t *keys;
uint64_t hva;
- unsigned long curkey;
int i, r = 0;
if (args->flags != 0)
if (!keys)
return -ENOMEM;
+ down_read(¤t->mm->mmap_sem);
for (i = 0; i < args->count; i++) {
hva = gfn_to_hva(kvm, args->start_gfn + i);
if (kvm_is_error_hva(hva)) {
r = -EFAULT;
- goto out;
+ break;
}
- curkey = get_guest_storage_key(current->mm, hva);
- if (IS_ERR_VALUE(curkey)) {
- r = curkey;
- goto out;
- }
- keys[i] = curkey;
+ r = get_guest_storage_key(current->mm, hva, &keys[i]);
+ if (r)
+ break;
+ }
+ up_read(¤t->mm->mmap_sem);
+
+ if (!r) {
+ r = copy_to_user((uint8_t __user *)args->skeydata_addr, keys,
+ sizeof(uint8_t) * args->count);
+ if (r)
+ r = -EFAULT;
}
- r = copy_to_user((uint8_t __user *)args->skeydata_addr, keys,
- sizeof(uint8_t) * args->count);
- if (r)
- r = -EFAULT;
-out:
kvfree(keys);
return r;
}
if (r)
goto out;
+ down_read(¤t->mm->mmap_sem);
for (i = 0; i < args->count; i++) {
hva = gfn_to_hva(kvm, args->start_gfn + i);
if (kvm_is_error_hva(hva)) {
r = -EFAULT;
- goto out;
+ break;
}
/* Lowest order bit is reserved */
if (keys[i] & 0x01) {
r = -EINVAL;
- goto out;
+ break;
}
- r = set_guest_storage_key(current->mm, hva,
- (unsigned long)keys[i], 0);
+ r = set_guest_storage_key(current->mm, hva, keys[i], 0);
if (r)
- goto out;
+ break;
}
+ up_read(¤t->mm->mmap_sem);
out:
kvfree(keys);
return r;
int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
{
+ gfp_t alloc_flags = GFP_KERNEL;
int i, rc;
char debug_name[16];
static unsigned long sca_offset;
rc = -ENOMEM;
+ ratelimit_state_init(&kvm->arch.sthyi_limit, 5 * HZ, 500);
+
kvm->arch.use_esca = 0; /* start with basic SCA */
+ if (!sclp.has_64bscao)
+ alloc_flags |= GFP_DMA;
rwlock_init(&kvm->arch.sca_lock);
- kvm->arch.sca = (struct bsca_block *) get_zeroed_page(GFP_KERNEL);
+ kvm->arch.sca = (struct bsca_block *) get_zeroed_page(alloc_flags);
if (!kvm->arch.sca)
goto out_err;
spin_lock(&kvm_lock);
memcpy(kvm->arch.model.fac_list, kvm->arch.model.fac_mask,
S390_ARCH_FAC_LIST_SIZE_BYTE);
+ set_kvm_facility(kvm->arch.model.fac_mask, 74);
+ set_kvm_facility(kvm->arch.model.fac_list, 74);
+
kvm->arch.model.cpuid = kvm_s390_get_initial_cpuid();
kvm->arch.model.ibc = sclp.ibc & 0x0fff;
if (id < KVM_S390_BSCA_CPU_SLOTS)
return true;
- if (!sclp.has_esca)
+ if (!sclp.has_esca || !sclp.has_64bscao)
return false;
mutex_lock(&kvm->lock);
kvm_s390_vcpu_setup_model(vcpu);
- vcpu->arch.sie_block->ecb = 0x02;
+ /* pgste_set_pte has special handling for !MACHINE_HAS_ESOP */
+ if (MACHINE_HAS_ESOP)
+ vcpu->arch.sie_block->ecb |= 0x02;
if (test_kvm_facility(vcpu->kvm, 9))
vcpu->arch.sie_block->ecb |= 0x04;
- if (test_kvm_facility(vcpu->kvm, 50) && test_kvm_facility(vcpu->kvm, 73))
+ if (test_kvm_facility(vcpu->kvm, 73))
vcpu->arch.sie_block->ecb |= 0x10;
- if (test_kvm_facility(vcpu->kvm, 8))
+ if (test_kvm_facility(vcpu->kvm, 8) && sclp.has_pfmfi)
vcpu->arch.sie_block->ecb2 |= 0x08;
- vcpu->arch.sie_block->eca = 0xC1002000U;
+ vcpu->arch.sie_block->eca = 0x1002000U;
+ if (sclp.has_cei)
+ vcpu->arch.sie_block->eca |= 0x80000000U;
+ if (sclp.has_ib)
+ vcpu->arch.sie_block->eca |= 0x40000000U;
if (sclp.has_siif)
vcpu->arch.sie_block->eca |= 1;
if (sclp.has_sigpif)
}
vcpu->arch.sie_block->riccbd = (unsigned long) &vcpu->run->s.regs.riccb;
vcpu->arch.sie_block->ictl |= ICTL_ISKE | ICTL_SSKE | ICTL_RRBE;
+ if (test_kvm_facility(vcpu->kvm, 74))
+ vcpu->arch.sie_block->ictl |= ICTL_OPEREXC;
if (vcpu->kvm->arch.use_cmma) {
rc = kvm_s390_vcpu_setup_cmma(vcpu);
vcpu->arch.sie_block = &sie_page->sie_block;
vcpu->arch.sie_block->itdba = (unsigned long) &sie_page->itdb;
+ /* the real guest size will always be smaller than msl */
+ vcpu->arch.sie_block->mso = 0;
+ vcpu->arch.sie_block->msl = sclp.hamax;
+
vcpu->arch.sie_block->icpua = id;
spin_lock_init(&vcpu->arch.local_int.lock);
vcpu->arch.local_int.float_int = &kvm->arch.float_int;
kvm_s390_vcpu_request(vcpu);
}
-static void kvm_gmap_notifier(struct gmap *gmap, unsigned long address)
+static void kvm_gmap_notifier(struct gmap *gmap, unsigned long start,
+ unsigned long end)
{
- int i;
struct kvm *kvm = gmap->private;
struct kvm_vcpu *vcpu;
+ unsigned long prefix;
+ int i;
+ if (start >= 1UL << 31)
+ /* We are only interested in prefix pages */
+ return;
kvm_for_each_vcpu(i, vcpu, kvm) {
/* match against both prefix pages */
- if (kvm_s390_get_prefix(vcpu) == (address & ~0x1000UL)) {
- VCPU_EVENT(vcpu, 2, "gmap notifier for %lx", address);
+ prefix = kvm_s390_get_prefix(vcpu);
+ if (prefix <= end && start <= prefix + 2*PAGE_SIZE - 1) {
+ VCPU_EVENT(vcpu, 2, "gmap notifier for %lx-%lx",
+ start, end);
kvm_s390_sync_request(KVM_REQ_MMU_RELOAD, vcpu);
}
}
if (dbg->control & ~VALID_GUESTDBG_FLAGS)
return -EINVAL;
+ if (!sclp.has_gpere)
+ return -EINVAL;
if (dbg->control & KVM_GUESTDBG_ENABLE) {
vcpu->guest_debug = dbg->control;
static void __enable_ibs_on_vcpu(struct kvm_vcpu *vcpu)
{
+ if (!sclp.has_ibs)
+ return;
kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu);
kvm_s390_sync_request(KVM_REQ_ENABLE_IBS, vcpu);
}
projects / deliverable / linux.git / blobdiff