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-rw-r--r--arch/s390/include/asm/kvm_host.h6
-rw-r--r--arch/s390/kernel/entry.S2
-rw-r--r--arch/s390/kvm/intercept.c16
-rw-r--r--arch/s390/kvm/interrupt.c90
-rw-r--r--arch/s390/kvm/kvm-s390.c81
-rw-r--r--arch/s390/kvm/kvm-s390.h25
-rw-r--r--arch/s390/kvm/priv.c8
7 files changed, 140 insertions, 88 deletions
diff --git a/arch/s390/include/asm/kvm_host.h b/arch/s390/include/asm/kvm_host.h
index d01fc588b5c3..3024acbe1f9d 100644
--- a/arch/s390/include/asm/kvm_host.h
+++ b/arch/s390/include/asm/kvm_host.h
@@ -80,6 +80,7 @@ struct sca_block {
#define CPUSTAT_MCDS 0x00000100
#define CPUSTAT_SM 0x00000080
#define CPUSTAT_IBS 0x00000040
+#define CPUSTAT_GED2 0x00000010
#define CPUSTAT_G 0x00000008
#define CPUSTAT_GED 0x00000004
#define CPUSTAT_J 0x00000002
@@ -95,7 +96,8 @@ struct kvm_s390_sie_block {
#define PROG_IN_SIE (1<<0)
__u32 prog0c; /* 0x000c */
__u8 reserved10[16]; /* 0x0010 */
-#define PROG_BLOCK_SIE 0x00000001
+#define PROG_BLOCK_SIE (1<<0)
+#define PROG_REQUEST (1<<1)
atomic_t prog20; /* 0x0020 */
__u8 reserved24[4]; /* 0x0024 */
__u64 cputm; /* 0x0028 */
@@ -634,7 +636,7 @@ static inline void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) {}
static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
static inline void kvm_arch_free_memslot(struct kvm *kvm,
struct kvm_memory_slot *free, struct kvm_memory_slot *dont) {}
-static inline void kvm_arch_memslots_updated(struct kvm *kvm) {}
+static inline void kvm_arch_memslots_updated(struct kvm *kvm, struct kvm_memslots *slots) {}
static inline void kvm_arch_flush_shadow_all(struct kvm *kvm) {}
static inline void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
struct kvm_memory_slot *slot) {}
diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S
index 99b44acbfcc7..3238893c9d4f 100644
--- a/arch/s390/kernel/entry.S
+++ b/arch/s390/kernel/entry.S
@@ -1005,7 +1005,7 @@ ENTRY(sie64a)
.Lsie_gmap:
lg %r14,__SF_EMPTY(%r15) # get control block pointer
oi __SIE_PROG0C+3(%r14),1 # we are going into SIE now
- tm __SIE_PROG20+3(%r14),1 # last exit...
+ tm __SIE_PROG20+3(%r14),3 # last exit...
jnz .Lsie_done
LPP __SF_EMPTY(%r15) # set guest id
sie 0(%r14)
diff --git a/arch/s390/kvm/intercept.c b/arch/s390/kvm/intercept.c
index 9e3779e3e496..7365e8a46032 100644
--- a/arch/s390/kvm/intercept.c
+++ b/arch/s390/kvm/intercept.c
@@ -241,21 +241,6 @@ static int handle_prog(struct kvm_vcpu *vcpu)
return kvm_s390_inject_prog_irq(vcpu, &pgm_info);
}
-static int handle_instruction_and_prog(struct kvm_vcpu *vcpu)
-{
- int rc, rc2;
-
- vcpu->stat.exit_instr_and_program++;
- rc = handle_instruction(vcpu);
- rc2 = handle_prog(vcpu);
-
- if (rc == -EOPNOTSUPP)
- vcpu->arch.sie_block->icptcode = 0x04;
- if (rc)
- return rc;
- return rc2;
-}
-
/**
* handle_external_interrupt - used for external interruption interceptions
*
@@ -355,7 +340,6 @@ static const intercept_handler_t intercept_funcs[] = {
[0x00 >> 2] = handle_noop,
[0x04 >> 2] = handle_instruction,
[0x08 >> 2] = handle_prog,
- [0x0C >> 2] = handle_instruction_and_prog,
[0x10 >> 2] = handle_noop,
[0x14 >> 2] = handle_external_interrupt,
[0x18 >> 2] = handle_noop,
diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c
index 0d3deef6edff..c98d89708e99 100644
--- a/arch/s390/kvm/interrupt.c
+++ b/arch/s390/kvm/interrupt.c
@@ -134,6 +134,8 @@ static unsigned long deliverable_irqs(struct kvm_vcpu *vcpu)
active_mask = pending_local_irqs(vcpu);
active_mask |= pending_floating_irqs(vcpu);
+ if (!active_mask)
+ return 0;
if (psw_extint_disabled(vcpu))
active_mask &= ~IRQ_PEND_EXT_MASK;
@@ -941,12 +943,9 @@ int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu)
if (cpu_timer_irq_pending(vcpu))
set_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
- do {
- irqs = deliverable_irqs(vcpu);
+ while ((irqs = deliverable_irqs(vcpu)) && !rc) {
/* bits are in the order of interrupt priority */
irq_type = find_first_bit(&irqs, IRQ_PEND_COUNT);
- if (irq_type == IRQ_PEND_COUNT)
- break;
if (is_ioirq(irq_type)) {
rc = __deliver_io(vcpu, irq_type);
} else {
@@ -958,9 +957,7 @@ int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu)
}
rc = func(vcpu);
}
- if (rc)
- break;
- } while (!rc);
+ }
set_intercept_indicators(vcpu);
@@ -1061,7 +1058,7 @@ static int __inject_extcall(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
if (sclp.has_sigpif)
return __inject_extcall_sigpif(vcpu, src_id);
- if (!test_and_set_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs))
+ if (test_and_set_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs))
return -EBUSY;
*extcall = irq->u.extcall;
atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
@@ -1340,12 +1337,54 @@ static int __inject_io(struct kvm *kvm, struct kvm_s390_interrupt_info *inti)
return 0;
}
-static int __inject_vm(struct kvm *kvm, struct kvm_s390_interrupt_info *inti)
+/*
+ * Find a destination VCPU for a floating irq and kick it.
+ */
+static void __floating_irq_kick(struct kvm *kvm, u64 type)
{
+ struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
struct kvm_s390_local_interrupt *li;
+ struct kvm_vcpu *dst_vcpu;
+ int sigcpu, online_vcpus, nr_tries = 0;
+
+ online_vcpus = atomic_read(&kvm->online_vcpus);
+ if (!online_vcpus)
+ return;
+
+ /* find idle VCPUs first, then round robin */
+ sigcpu = find_first_bit(fi->idle_mask, online_vcpus);
+ if (sigcpu == online_vcpus) {
+ do {
+ sigcpu = fi->next_rr_cpu;
+ fi->next_rr_cpu = (fi->next_rr_cpu + 1) % online_vcpus;
+ /* avoid endless loops if all vcpus are stopped */
+ if (nr_tries++ >= online_vcpus)
+ return;
+ } while (is_vcpu_stopped(kvm_get_vcpu(kvm, sigcpu)));
+ }
+ dst_vcpu = kvm_get_vcpu(kvm, sigcpu);
+
+ /* make the VCPU drop out of the SIE, or wake it up if sleeping */
+ li = &dst_vcpu->arch.local_int;
+ spin_lock(&li->lock);
+ switch (type) {
+ case KVM_S390_MCHK:
+ atomic_set_mask(CPUSTAT_STOP_INT, li->cpuflags);
+ break;
+ case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
+ atomic_set_mask(CPUSTAT_IO_INT, li->cpuflags);
+ break;
+ default:
+ atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
+ break;
+ }
+ spin_unlock(&li->lock);
+ kvm_s390_vcpu_wakeup(dst_vcpu);
+}
+
+static int __inject_vm(struct kvm *kvm, struct kvm_s390_interrupt_info *inti)
+{
struct kvm_s390_float_interrupt *fi;
- struct kvm_vcpu *dst_vcpu = NULL;
- int sigcpu;
u64 type = READ_ONCE(inti->type);
int rc;
@@ -1373,32 +1412,8 @@ static int __inject_vm(struct kvm *kvm, struct kvm_s390_interrupt_info *inti)
if (rc)
return rc;
- sigcpu = find_first_bit(fi->idle_mask, KVM_MAX_VCPUS);
- if (sigcpu == KVM_MAX_VCPUS) {
- do {
- sigcpu = fi->next_rr_cpu++;
- if (sigcpu == KVM_MAX_VCPUS)
- sigcpu = fi->next_rr_cpu = 0;
- } while (kvm_get_vcpu(kvm, sigcpu) == NULL);
- }
- dst_vcpu = kvm_get_vcpu(kvm, sigcpu);
- li = &dst_vcpu->arch.local_int;
- spin_lock(&li->lock);
- switch (type) {
- case KVM_S390_MCHK:
- atomic_set_mask(CPUSTAT_STOP_INT, li->cpuflags);
- break;
- case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
- atomic_set_mask(CPUSTAT_IO_INT, li->cpuflags);
- break;
- default:
- atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
- break;
- }
- spin_unlock(&li->lock);
- kvm_s390_vcpu_wakeup(kvm_get_vcpu(kvm, sigcpu));
+ __floating_irq_kick(kvm, type);
return 0;
-
}
int kvm_s390_inject_vm(struct kvm *kvm,
@@ -1606,6 +1621,9 @@ void kvm_s390_clear_float_irqs(struct kvm *kvm)
int i;
spin_lock(&fi->lock);
+ fi->pending_irqs = 0;
+ memset(&fi->srv_signal, 0, sizeof(fi->srv_signal));
+ memset(&fi->mchk, 0, sizeof(fi->mchk));
for (i = 0; i < FIRQ_LIST_COUNT; i++)
clear_irq_list(&fi->lists[i]);
for (i = 0; i < FIRQ_MAX_COUNT; i++)
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index c4e81b26c1b0..2078f92d15ac 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -36,6 +36,10 @@
#include "kvm-s390.h"
#include "gaccess.h"
+#define KMSG_COMPONENT "kvm-s390"
+#undef pr_fmt
+#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+
#define CREATE_TRACE_POINTS
#include "trace.h"
#include "trace-s390.h"
@@ -110,7 +114,7 @@ struct kvm_stats_debugfs_item debugfs_entries[] = {
/* upper facilities limit for kvm */
unsigned long kvm_s390_fac_list_mask[] = {
0xffe6fffbfcfdfc40UL,
- 0x005c800000000000UL,
+ 0x005e800000000000UL,
};
unsigned long kvm_s390_fac_list_mask_size(void)
@@ -236,6 +240,7 @@ int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
{
int r;
unsigned long n;
+ struct kvm_memslots *slots;
struct kvm_memory_slot *memslot;
int is_dirty = 0;
@@ -245,7 +250,8 @@ int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
if (log->slot >= KVM_USER_MEM_SLOTS)
goto out;
- memslot = id_to_memslot(kvm->memslots, log->slot);
+ slots = kvm_memslots(kvm);
+ memslot = id_to_memslot(slots, log->slot);
r = -ENOENT;
if (!memslot->dirty_bitmap)
goto out;
@@ -454,10 +460,10 @@ static int kvm_s390_set_tod_low(struct kvm *kvm, struct kvm_device_attr *attr)
mutex_lock(&kvm->lock);
kvm->arch.epoch = gtod - host_tod;
- kvm_for_each_vcpu(vcpu_idx, cur_vcpu, kvm) {
+ kvm_s390_vcpu_block_all(kvm);
+ kvm_for_each_vcpu(vcpu_idx, cur_vcpu, kvm)
cur_vcpu->arch.sie_block->epoch = kvm->arch.epoch;
- exit_sie(cur_vcpu);
- }
+ kvm_s390_vcpu_unblock_all(kvm);
mutex_unlock(&kvm->lock);
return 0;
}
@@ -1311,8 +1317,13 @@ int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
atomic_set(&vcpu->arch.sie_block->cpuflags, CPUSTAT_ZARCH |
CPUSTAT_SM |
- CPUSTAT_STOPPED |
- CPUSTAT_GED);
+ CPUSTAT_STOPPED);
+
+ if (test_kvm_facility(vcpu->kvm, 78))
+ atomic_set_mask(CPUSTAT_GED2, &vcpu->arch.sie_block->cpuflags);
+ else if (test_kvm_facility(vcpu->kvm, 8))
+ atomic_set_mask(CPUSTAT_GED, &vcpu->arch.sie_block->cpuflags);
+
kvm_s390_vcpu_setup_model(vcpu);
vcpu->arch.sie_block->ecb = 6;
@@ -1409,16 +1420,28 @@ int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu)
return kvm_s390_vcpu_has_irq(vcpu, 0);
}
-void s390_vcpu_block(struct kvm_vcpu *vcpu)
+void kvm_s390_vcpu_block(struct kvm_vcpu *vcpu)
{
atomic_set_mask(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20);
+ exit_sie(vcpu);
}
-void s390_vcpu_unblock(struct kvm_vcpu *vcpu)
+void kvm_s390_vcpu_unblock(struct kvm_vcpu *vcpu)
{
atomic_clear_mask(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20);
}
+static void kvm_s390_vcpu_request(struct kvm_vcpu *vcpu)
+{
+ atomic_set_mask(PROG_REQUEST, &vcpu->arch.sie_block->prog20);
+ exit_sie(vcpu);
+}
+
+static void kvm_s390_vcpu_request_handled(struct kvm_vcpu *vcpu)
+{
+ atomic_clear_mask(PROG_REQUEST, &vcpu->arch.sie_block->prog20);
+}
+
/*
* Kick a guest cpu out of SIE and wait until SIE is not running.
* If the CPU is not running (e.g. waiting as idle) the function will
@@ -1430,11 +1453,11 @@ void exit_sie(struct kvm_vcpu *vcpu)
cpu_relax();
}
-/* Kick a guest cpu out of SIE and prevent SIE-reentry */
-void exit_sie_sync(struct kvm_vcpu *vcpu)
+/* Kick a guest cpu out of SIE to process a request synchronously */
+void kvm_s390_sync_request(int req, struct kvm_vcpu *vcpu)
{
- s390_vcpu_block(vcpu);
- exit_sie(vcpu);
+ kvm_make_request(req, vcpu);
+ kvm_s390_vcpu_request(vcpu);
}
static void kvm_gmap_notifier(struct gmap *gmap, unsigned long address)
@@ -1447,8 +1470,7 @@ static void kvm_gmap_notifier(struct gmap *gmap, unsigned long address)
/* match against both prefix pages */
if (kvm_s390_get_prefix(vcpu) == (address & ~0x1000UL)) {
VCPU_EVENT(vcpu, 2, "gmap notifier for %lx", address);
- kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu);
- exit_sie_sync(vcpu);
+ kvm_s390_sync_request(KVM_REQ_MMU_RELOAD, vcpu);
}
}
}
@@ -1720,8 +1742,10 @@ static bool ibs_enabled(struct kvm_vcpu *vcpu)
static int kvm_s390_handle_requests(struct kvm_vcpu *vcpu)
{
+ if (!vcpu->requests)
+ return 0;
retry:
- s390_vcpu_unblock(vcpu);
+ kvm_s390_vcpu_request_handled(vcpu);
/*
* We use MMU_RELOAD just to re-arm the ipte notifier for the
* guest prefix page. gmap_ipte_notify will wait on the ptl lock.
@@ -1993,12 +2017,14 @@ static int __vcpu_run(struct kvm_vcpu *vcpu)
* As PF_VCPU will be used in fault handler, between
* guest_enter and guest_exit should be no uaccess.
*/
- preempt_disable();
- kvm_guest_enter();
- preempt_enable();
+ local_irq_disable();
+ __kvm_guest_enter();
+ local_irq_enable();
exit_reason = sie64a(vcpu->arch.sie_block,
vcpu->run->s.regs.gprs);
- kvm_guest_exit();
+ local_irq_disable();
+ __kvm_guest_exit();
+ local_irq_enable();
vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
rc = vcpu_post_run(vcpu, exit_reason);
@@ -2068,7 +2094,7 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm)) {
kvm_s390_vcpu_start(vcpu);
} else if (is_vcpu_stopped(vcpu)) {
- pr_err_ratelimited("kvm-s390: can't run stopped vcpu %d\n",
+ pr_err_ratelimited("can't run stopped vcpu %d\n",
vcpu->vcpu_id);
return -EINVAL;
}
@@ -2206,8 +2232,7 @@ int kvm_s390_vcpu_store_adtl_status(struct kvm_vcpu *vcpu, unsigned long addr)
static void __disable_ibs_on_vcpu(struct kvm_vcpu *vcpu)
{
kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu);
- kvm_make_request(KVM_REQ_DISABLE_IBS, vcpu);
- exit_sie_sync(vcpu);
+ kvm_s390_sync_request(KVM_REQ_DISABLE_IBS, vcpu);
}
static void __disable_ibs_on_all_vcpus(struct kvm *kvm)
@@ -2223,8 +2248,7 @@ static void __disable_ibs_on_all_vcpus(struct kvm *kvm)
static void __enable_ibs_on_vcpu(struct kvm_vcpu *vcpu)
{
kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu);
- kvm_make_request(KVM_REQ_ENABLE_IBS, vcpu);
- exit_sie_sync(vcpu);
+ kvm_s390_sync_request(KVM_REQ_ENABLE_IBS, vcpu);
}
void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu)
@@ -2563,7 +2587,7 @@ int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
/* Section: memory related */
int kvm_arch_prepare_memory_region(struct kvm *kvm,
struct kvm_memory_slot *memslot,
- struct kvm_userspace_memory_region *mem,
+ const struct kvm_userspace_memory_region *mem,
enum kvm_mr_change change)
{
/* A few sanity checks. We can have memory slots which have to be
@@ -2581,8 +2605,9 @@ int kvm_arch_prepare_memory_region(struct kvm *kvm,
}
void kvm_arch_commit_memory_region(struct kvm *kvm,
- struct kvm_userspace_memory_region *mem,
+ const struct kvm_userspace_memory_region *mem,
const struct kvm_memory_slot *old,
+ const struct kvm_memory_slot *new,
enum kvm_mr_change change)
{
int rc;
@@ -2601,7 +2626,7 @@ void kvm_arch_commit_memory_region(struct kvm *kvm,
rc = gmap_map_segment(kvm->arch.gmap, mem->userspace_addr,
mem->guest_phys_addr, mem->memory_size);
if (rc)
- printk(KERN_WARNING "kvm-s390: failed to commit memory region\n");
+ pr_warn("failed to commit memory region\n");
return;
}
diff --git a/arch/s390/kvm/kvm-s390.h b/arch/s390/kvm/kvm-s390.h
index ca108b90ae56..c5704786e473 100644
--- a/arch/s390/kvm/kvm-s390.h
+++ b/arch/s390/kvm/kvm-s390.h
@@ -211,10 +211,10 @@ int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr);
int kvm_s390_vcpu_store_adtl_status(struct kvm_vcpu *vcpu, unsigned long addr);
void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu);
void kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu);
-void s390_vcpu_block(struct kvm_vcpu *vcpu);
-void s390_vcpu_unblock(struct kvm_vcpu *vcpu);
+void kvm_s390_vcpu_block(struct kvm_vcpu *vcpu);
+void kvm_s390_vcpu_unblock(struct kvm_vcpu *vcpu);
void exit_sie(struct kvm_vcpu *vcpu);
-void exit_sie_sync(struct kvm_vcpu *vcpu);
+void kvm_s390_sync_request(int req, struct kvm_vcpu *vcpu);
int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu);
void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu);
/* is cmma enabled */
@@ -228,6 +228,25 @@ int kvm_s390_handle_diag(struct kvm_vcpu *vcpu);
int kvm_s390_inject_prog_irq(struct kvm_vcpu *vcpu,
struct kvm_s390_pgm_info *pgm_info);
+static inline void kvm_s390_vcpu_block_all(struct kvm *kvm)
+{
+ int i;
+ struct kvm_vcpu *vcpu;
+
+ WARN_ON(!mutex_is_locked(&kvm->lock));
+ kvm_for_each_vcpu(i, vcpu, kvm)
+ kvm_s390_vcpu_block(vcpu);
+}
+
+static inline void kvm_s390_vcpu_unblock_all(struct kvm *kvm)
+{
+ int i;
+ struct kvm_vcpu *vcpu;
+
+ kvm_for_each_vcpu(i, vcpu, kvm)
+ kvm_s390_vcpu_unblock(vcpu);
+}
+
/**
* kvm_s390_inject_prog_cond - conditionally inject a program check
* @vcpu: virtual cpu
diff --git a/arch/s390/kvm/priv.c b/arch/s390/kvm/priv.c
index d22d8ee1ff9d..ad4242245771 100644
--- a/arch/s390/kvm/priv.c
+++ b/arch/s390/kvm/priv.c
@@ -698,10 +698,14 @@ static int handle_pfmf(struct kvm_vcpu *vcpu)
case 0x00001000:
end = (start + (1UL << 20)) & ~((1UL << 20) - 1);
break;
- /* We dont support EDAT2
case 0x00002000:
+ /* only support 2G frame size if EDAT2 is available and we are
+ not in 24-bit addressing mode */
+ if (!test_kvm_facility(vcpu->kvm, 78) ||
+ psw_bits(vcpu->arch.sie_block->gpsw).eaba == PSW_AMODE_24BIT)
+ return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
end = (start + (1UL << 31)) & ~((1UL << 31) - 1);
- break;*/
+ break;
default:
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
}
generated by cgit v1.2.3 (git 2.0.4) at 2024-11-16 22:31:19 +0000