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-rw-r--r--arch/s390/kvm/intercept.c51
-rw-r--r--arch/s390/kvm/interrupt.c123
-rw-r--r--arch/s390/kvm/kvm-s390.c81
-rw-r--r--arch/s390/kvm/kvm-s390.h7
-rw-r--r--arch/s390/kvm/priv.c192
-rw-r--r--arch/s390/kvm/vsie.c20
6 files changed, 273 insertions, 201 deletions
diff --git a/arch/s390/kvm/intercept.c b/arch/s390/kvm/intercept.c
index 9c7d70715862..07c6e81163bf 100644
--- a/arch/s390/kvm/intercept.c
+++ b/arch/s390/kvm/intercept.c
@@ -22,22 +22,6 @@
#include "trace.h"
#include "trace-s390.h"
-
-static const intercept_handler_t instruction_handlers[256] = {
- [0x01] = kvm_s390_handle_01,
- [0x82] = kvm_s390_handle_lpsw,
- [0x83] = kvm_s390_handle_diag,
- [0xaa] = kvm_s390_handle_aa,
- [0xae] = kvm_s390_handle_sigp,
- [0xb2] = kvm_s390_handle_b2,
- [0xb6] = kvm_s390_handle_stctl,
- [0xb7] = kvm_s390_handle_lctl,
- [0xb9] = kvm_s390_handle_b9,
- [0xe3] = kvm_s390_handle_e3,
- [0xe5] = kvm_s390_handle_e5,
- [0xeb] = kvm_s390_handle_eb,
-};
-
u8 kvm_s390_get_ilen(struct kvm_vcpu *vcpu)
{
struct kvm_s390_sie_block *sie_block = vcpu->arch.sie_block;
@@ -129,16 +113,39 @@ static int handle_validity(struct kvm_vcpu *vcpu)
static int handle_instruction(struct kvm_vcpu *vcpu)
{
- intercept_handler_t handler;
-
vcpu->stat.exit_instruction++;
trace_kvm_s390_intercept_instruction(vcpu,
vcpu->arch.sie_block->ipa,
vcpu->arch.sie_block->ipb);
- handler = instruction_handlers[vcpu->arch.sie_block->ipa >> 8];
- if (handler)
- return handler(vcpu);
- return -EOPNOTSUPP;
+
+ switch (vcpu->arch.sie_block->ipa >> 8) {
+ case 0x01:
+ return kvm_s390_handle_01(vcpu);
+ case 0x82:
+ return kvm_s390_handle_lpsw(vcpu);
+ case 0x83:
+ return kvm_s390_handle_diag(vcpu);
+ case 0xaa:
+ return kvm_s390_handle_aa(vcpu);
+ case 0xae:
+ return kvm_s390_handle_sigp(vcpu);
+ case 0xb2:
+ return kvm_s390_handle_b2(vcpu);
+ case 0xb6:
+ return kvm_s390_handle_stctl(vcpu);
+ case 0xb7:
+ return kvm_s390_handle_lctl(vcpu);
+ case 0xb9:
+ return kvm_s390_handle_b9(vcpu);
+ case 0xe3:
+ return kvm_s390_handle_e3(vcpu);
+ case 0xe5:
+ return kvm_s390_handle_e5(vcpu);
+ case 0xeb:
+ return kvm_s390_handle_eb(vcpu);
+ default:
+ return -EOPNOTSUPP;
+ }
}
static int inject_prog_on_prog_intercept(struct kvm_vcpu *vcpu)
diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c
index aabf46f5f883..b04616b57a94 100644
--- a/arch/s390/kvm/interrupt.c
+++ b/arch/s390/kvm/interrupt.c
@@ -169,8 +169,15 @@ static int ckc_interrupts_enabled(struct kvm_vcpu *vcpu)
static int ckc_irq_pending(struct kvm_vcpu *vcpu)
{
- if (vcpu->arch.sie_block->ckc >= kvm_s390_get_tod_clock_fast(vcpu->kvm))
+ const u64 now = kvm_s390_get_tod_clock_fast(vcpu->kvm);
+ const u64 ckc = vcpu->arch.sie_block->ckc;
+
+ if (vcpu->arch.sie_block->gcr[0] & 0x0020000000000000ul) {
+ if ((s64)ckc >= (s64)now)
+ return 0;
+ } else if (ckc >= now) {
return 0;
+ }
return ckc_interrupts_enabled(vcpu);
}
@@ -187,12 +194,6 @@ static int cpu_timer_irq_pending(struct kvm_vcpu *vcpu)
return kvm_s390_get_cpu_timer(vcpu) >> 63;
}
-static inline int is_ioirq(unsigned long irq_type)
-{
- return ((irq_type >= IRQ_PEND_IO_ISC_7) &&
- (irq_type <= IRQ_PEND_IO_ISC_0));
-}
-
static uint64_t isc_to_isc_bits(int isc)
{
return (0x80 >> isc) << 24;
@@ -236,10 +237,15 @@ static inline int kvm_s390_gisa_tac_ipm_gisc(struct kvm_s390_gisa *gisa, u32 gis
return test_and_clear_bit_inv(IPM_BIT_OFFSET + gisc, (unsigned long *) gisa);
}
-static inline unsigned long pending_irqs(struct kvm_vcpu *vcpu)
+static inline unsigned long pending_irqs_no_gisa(struct kvm_vcpu *vcpu)
{
return vcpu->kvm->arch.float_int.pending_irqs |
- vcpu->arch.local_int.pending_irqs |
+ vcpu->arch.local_int.pending_irqs;
+}
+
+static inline unsigned long pending_irqs(struct kvm_vcpu *vcpu)
+{
+ return pending_irqs_no_gisa(vcpu) |
kvm_s390_gisa_get_ipm(vcpu->kvm->arch.gisa) << IRQ_PEND_IO_ISC_7;
}
@@ -337,7 +343,7 @@ static void __reset_intercept_indicators(struct kvm_vcpu *vcpu)
static void set_intercept_indicators_io(struct kvm_vcpu *vcpu)
{
- if (!(pending_irqs(vcpu) & IRQ_PEND_IO_MASK))
+ if (!(pending_irqs_no_gisa(vcpu) & IRQ_PEND_IO_MASK))
return;
else if (psw_ioint_disabled(vcpu))
kvm_s390_set_cpuflags(vcpu, CPUSTAT_IO_INT);
@@ -1011,24 +1017,6 @@ out:
return rc;
}
-typedef int (*deliver_irq_t)(struct kvm_vcpu *vcpu);
-
-static const deliver_irq_t deliver_irq_funcs[] = {
- [IRQ_PEND_MCHK_EX] = __deliver_machine_check,
- [IRQ_PEND_MCHK_REP] = __deliver_machine_check,
- [IRQ_PEND_PROG] = __deliver_prog,
- [IRQ_PEND_EXT_EMERGENCY] = __deliver_emergency_signal,
- [IRQ_PEND_EXT_EXTERNAL] = __deliver_external_call,
- [IRQ_PEND_EXT_CLOCK_COMP] = __deliver_ckc,
- [IRQ_PEND_EXT_CPU_TIMER] = __deliver_cpu_timer,
- [IRQ_PEND_RESTART] = __deliver_restart,
- [IRQ_PEND_SET_PREFIX] = __deliver_set_prefix,
- [IRQ_PEND_PFAULT_INIT] = __deliver_pfault_init,
- [IRQ_PEND_EXT_SERVICE] = __deliver_service,
- [IRQ_PEND_PFAULT_DONE] = __deliver_pfault_done,
- [IRQ_PEND_VIRTIO] = __deliver_virtio,
-};
-
/* Check whether an external call is pending (deliverable or not) */
int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu)
{
@@ -1066,13 +1054,19 @@ int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
static u64 __calculate_sltime(struct kvm_vcpu *vcpu)
{
- u64 now, cputm, sltime = 0;
+ const u64 now = kvm_s390_get_tod_clock_fast(vcpu->kvm);
+ const u64 ckc = vcpu->arch.sie_block->ckc;
+ u64 cputm, sltime = 0;
if (ckc_interrupts_enabled(vcpu)) {
- now = kvm_s390_get_tod_clock_fast(vcpu->kvm);
- sltime = tod_to_ns(vcpu->arch.sie_block->ckc - now);
- /* already expired or overflow? */
- if (!sltime || vcpu->arch.sie_block->ckc <= now)
+ if (vcpu->arch.sie_block->gcr[0] & 0x0020000000000000ul) {
+ if ((s64)now < (s64)ckc)
+ sltime = tod_to_ns((s64)ckc - (s64)now);
+ } else if (now < ckc) {
+ sltime = tod_to_ns(ckc - now);
+ }
+ /* already expired */
+ if (!sltime)
return 0;
if (cpu_timer_interrupts_enabled(vcpu)) {
cputm = kvm_s390_get_cpu_timer(vcpu);
@@ -1192,7 +1186,6 @@ void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu)
int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu)
{
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
- deliver_irq_t func;
int rc = 0;
unsigned long irq_type;
unsigned long irqs;
@@ -1212,16 +1205,57 @@ int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu)
while ((irqs = deliverable_irqs(vcpu)) && !rc) {
/* bits are in the reverse order of interrupt priority */
irq_type = find_last_bit(&irqs, IRQ_PEND_COUNT);
- if (is_ioirq(irq_type)) {
+ switch (irq_type) {
+ case IRQ_PEND_IO_ISC_0:
+ case IRQ_PEND_IO_ISC_1:
+ case IRQ_PEND_IO_ISC_2:
+ case IRQ_PEND_IO_ISC_3:
+ case IRQ_PEND_IO_ISC_4:
+ case IRQ_PEND_IO_ISC_5:
+ case IRQ_PEND_IO_ISC_6:
+ case IRQ_PEND_IO_ISC_7:
rc = __deliver_io(vcpu, irq_type);
- } else {
- func = deliver_irq_funcs[irq_type];
- if (!func) {
- WARN_ON_ONCE(func == NULL);
- clear_bit(irq_type, &li->pending_irqs);
- continue;
- }
- rc = func(vcpu);
+ break;
+ case IRQ_PEND_MCHK_EX:
+ case IRQ_PEND_MCHK_REP:
+ rc = __deliver_machine_check(vcpu);
+ break;
+ case IRQ_PEND_PROG:
+ rc = __deliver_prog(vcpu);
+ break;
+ case IRQ_PEND_EXT_EMERGENCY:
+ rc = __deliver_emergency_signal(vcpu);
+ break;
+ case IRQ_PEND_EXT_EXTERNAL:
+ rc = __deliver_external_call(vcpu);
+ break;
+ case IRQ_PEND_EXT_CLOCK_COMP:
+ rc = __deliver_ckc(vcpu);
+ break;
+ case IRQ_PEND_EXT_CPU_TIMER:
+ rc = __deliver_cpu_timer(vcpu);
+ break;
+ case IRQ_PEND_RESTART:
+ rc = __deliver_restart(vcpu);
+ break;
+ case IRQ_PEND_SET_PREFIX:
+ rc = __deliver_set_prefix(vcpu);
+ break;
+ case IRQ_PEND_PFAULT_INIT:
+ rc = __deliver_pfault_init(vcpu);
+ break;
+ case IRQ_PEND_EXT_SERVICE:
+ rc = __deliver_service(vcpu);
+ break;
+ case IRQ_PEND_PFAULT_DONE:
+ rc = __deliver_pfault_done(vcpu);
+ break;
+ case IRQ_PEND_VIRTIO:
+ rc = __deliver_virtio(vcpu);
+ break;
+ default:
+ WARN_ONCE(1, "Unknown pending irq type %ld", irq_type);
+ clear_bit(irq_type, &li->pending_irqs);
}
}
@@ -1701,7 +1735,8 @@ static void __floating_irq_kick(struct kvm *kvm, u64 type)
kvm_s390_set_cpuflags(dst_vcpu, CPUSTAT_STOP_INT);
break;
case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
- kvm_s390_set_cpuflags(dst_vcpu, CPUSTAT_IO_INT);
+ if (!(type & KVM_S390_INT_IO_AI_MASK && kvm->arch.gisa))
+ kvm_s390_set_cpuflags(dst_vcpu, CPUSTAT_IO_INT);
break;
default:
kvm_s390_set_cpuflags(dst_vcpu, CPUSTAT_EXT_INT);
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index ba4c7092335a..339ac0964590 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -86,6 +86,7 @@ struct kvm_stats_debugfs_item debugfs_entries[] = {
{ "deliver_prefix_signal", VCPU_STAT(deliver_prefix_signal) },
{ "deliver_restart_signal", VCPU_STAT(deliver_restart_signal) },
{ "deliver_program_interruption", VCPU_STAT(deliver_program_int) },
+ { "deliver_io_interrupt", VCPU_STAT(deliver_io_int) },
{ "exit_wait_state", VCPU_STAT(exit_wait_state) },
{ "instruction_epsw", VCPU_STAT(instruction_epsw) },
{ "instruction_gs", VCPU_STAT(instruction_gs) },
@@ -179,6 +180,28 @@ int kvm_arch_hardware_enable(void)
static void kvm_gmap_notifier(struct gmap *gmap, unsigned long start,
unsigned long end);
+static void kvm_clock_sync_scb(struct kvm_s390_sie_block *scb, u64 delta)
+{
+ u8 delta_idx = 0;
+
+ /*
+ * The TOD jumps by delta, we have to compensate this by adding
+ * -delta to the epoch.
+ */
+ delta = -delta;
+
+ /* sign-extension - we're adding to signed values below */
+ if ((s64)delta < 0)
+ delta_idx = -1;
+
+ scb->epoch += delta;
+ if (scb->ecd & ECD_MEF) {
+ scb->epdx += delta_idx;
+ if (scb->epoch < delta)
+ scb->epdx += 1;
+ }
+}
+
/*
* This callback is executed during stop_machine(). All CPUs are therefore
* temporarily stopped. In order not to change guest behavior, we have to
@@ -194,13 +217,17 @@ static int kvm_clock_sync(struct notifier_block *notifier, unsigned long val,
unsigned long long *delta = v;
list_for_each_entry(kvm, &vm_list, vm_list) {
- kvm->arch.epoch -= *delta;
kvm_for_each_vcpu(i, vcpu, kvm) {
- vcpu->arch.sie_block->epoch -= *delta;
+ kvm_clock_sync_scb(vcpu->arch.sie_block, *delta);
+ if (i == 0) {
+ kvm->arch.epoch = vcpu->arch.sie_block->epoch;
+ kvm->arch.epdx = vcpu->arch.sie_block->epdx;
+ }
if (vcpu->arch.cputm_enabled)
vcpu->arch.cputm_start += *delta;
if (vcpu->arch.vsie_block)
- vcpu->arch.vsie_block->epoch -= *delta;
+ kvm_clock_sync_scb(vcpu->arch.vsie_block,
+ *delta);
}
}
return NOTIFY_OK;
@@ -902,12 +929,9 @@ static int kvm_s390_set_tod_ext(struct kvm *kvm, struct kvm_device_attr *attr)
if (copy_from_user(&gtod, (void __user *)attr->addr, sizeof(gtod)))
return -EFAULT;
- if (test_kvm_facility(kvm, 139))
- kvm_s390_set_tod_clock_ext(kvm, &gtod);
- else if (gtod.epoch_idx == 0)
- kvm_s390_set_tod_clock(kvm, gtod.tod);
- else
+ if (!test_kvm_facility(kvm, 139) && gtod.epoch_idx)
return -EINVAL;
+ kvm_s390_set_tod_clock(kvm, &gtod);
VM_EVENT(kvm, 3, "SET: TOD extension: 0x%x, TOD base: 0x%llx",
gtod.epoch_idx, gtod.tod);
@@ -932,13 +956,14 @@ static int kvm_s390_set_tod_high(struct kvm *kvm, struct kvm_device_attr *attr)
static int kvm_s390_set_tod_low(struct kvm *kvm, struct kvm_device_attr *attr)
{
- u64 gtod;
+ struct kvm_s390_vm_tod_clock gtod = { 0 };
- if (copy_from_user(&gtod, (void __user *)attr->addr, sizeof(gtod)))
+ if (copy_from_user(&gtod.tod, (void __user *)attr->addr,
+ sizeof(gtod.tod)))
return -EFAULT;
- kvm_s390_set_tod_clock(kvm, gtod);
- VM_EVENT(kvm, 3, "SET: TOD base: 0x%llx", gtod);
+ kvm_s390_set_tod_clock(kvm, &gtod);
+ VM_EVENT(kvm, 3, "SET: TOD base: 0x%llx", gtod.tod);
return 0;
}
@@ -2122,6 +2147,7 @@ static void sca_add_vcpu(struct kvm_vcpu *vcpu)
/* we still need the basic sca for the ipte control */
vcpu->arch.sie_block->scaoh = (__u32)(((__u64)sca) >> 32);
vcpu->arch.sie_block->scaol = (__u32)(__u64)sca;
+ return;
}
read_lock(&vcpu->kvm->arch.sca_lock);
if (vcpu->kvm->arch.use_esca) {
@@ -2389,6 +2415,7 @@ void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
mutex_lock(&vcpu->kvm->lock);
preempt_disable();
vcpu->arch.sie_block->epoch = vcpu->kvm->arch.epoch;
+ vcpu->arch.sie_block->epdx = vcpu->kvm->arch.epdx;
preempt_enable();
mutex_unlock(&vcpu->kvm->lock);
if (!kvm_is_ucontrol(vcpu->kvm)) {
@@ -3021,8 +3048,8 @@ retry:
return 0;
}
-void kvm_s390_set_tod_clock_ext(struct kvm *kvm,
- const struct kvm_s390_vm_tod_clock *gtod)
+void kvm_s390_set_tod_clock(struct kvm *kvm,
+ const struct kvm_s390_vm_tod_clock *gtod)
{
struct kvm_vcpu *vcpu;
struct kvm_s390_tod_clock_ext htod;
@@ -3034,10 +3061,12 @@ void kvm_s390_set_tod_clock_ext(struct kvm *kvm,
get_tod_clock_ext((char *)&htod);
kvm->arch.epoch = gtod->tod - htod.tod;
- kvm->arch.epdx = gtod->epoch_idx - htod.epoch_idx;
-
- if (kvm->arch.epoch > gtod->tod)
- kvm->arch.epdx -= 1;
+ kvm->arch.epdx = 0;
+ if (test_kvm_facility(kvm, 139)) {
+ kvm->arch.epdx = gtod->epoch_idx - htod.epoch_idx;
+ if (kvm->arch.epoch > gtod->tod)
+ kvm->arch.epdx -= 1;
+ }
kvm_s390_vcpu_block_all(kvm);
kvm_for_each_vcpu(i, vcpu, kvm) {
@@ -3050,22 +3079,6 @@ void kvm_s390_set_tod_clock_ext(struct kvm *kvm,
mutex_unlock(&kvm->lock);
}
-void kvm_s390_set_tod_clock(struct kvm *kvm, u64 tod)
-{
- struct kvm_vcpu *vcpu;
- int i;
-
- mutex_lock(&kvm->lock);
- preempt_disable();
- kvm->arch.epoch = tod - get_tod_clock();
- kvm_s390_vcpu_block_all(kvm);
- kvm_for_each_vcpu(i, vcpu, kvm)
- vcpu->arch.sie_block->epoch = kvm->arch.epoch;
- kvm_s390_vcpu_unblock_all(kvm);
- preempt_enable();
- mutex_unlock(&kvm->lock);
-}
-
/**
* kvm_arch_fault_in_page - fault-in guest page if necessary
* @vcpu: The corresponding virtual cpu
diff --git a/arch/s390/kvm/kvm-s390.h b/arch/s390/kvm/kvm-s390.h
index bd31b37b0e6f..f55ac0ef99ea 100644
--- a/arch/s390/kvm/kvm-s390.h
+++ b/arch/s390/kvm/kvm-s390.h
@@ -19,8 +19,6 @@
#include <asm/processor.h>
#include <asm/sclp.h>
-typedef int (*intercept_handler_t)(struct kvm_vcpu *vcpu);
-
/* Transactional Memory Execution related macros */
#define IS_TE_ENABLED(vcpu) ((vcpu->arch.sie_block->ecb & ECB_TE))
#define TDB_FORMAT1 1
@@ -283,9 +281,8 @@ int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu);
int kvm_s390_handle_sigp_pei(struct kvm_vcpu *vcpu);
/* implemented in kvm-s390.c */
-void kvm_s390_set_tod_clock_ext(struct kvm *kvm,
- const struct kvm_s390_vm_tod_clock *gtod);
-void kvm_s390_set_tod_clock(struct kvm *kvm, u64 tod);
+void kvm_s390_set_tod_clock(struct kvm *kvm,
+ const struct kvm_s390_vm_tod_clock *gtod);
long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable);
int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long addr);
int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr);
diff --git a/arch/s390/kvm/priv.c b/arch/s390/kvm/priv.c
index c4c4e157c036..f0b4185158af 100644
--- a/arch/s390/kvm/priv.c
+++ b/arch/s390/kvm/priv.c
@@ -85,9 +85,10 @@ int kvm_s390_handle_e3(struct kvm_vcpu *vcpu)
/* Handle SCK (SET CLOCK) interception */
static int handle_set_clock(struct kvm_vcpu *vcpu)
{
+ struct kvm_s390_vm_tod_clock gtod = { 0 };
int rc;
u8 ar;
- u64 op2, val;
+ u64 op2;
vcpu->stat.instruction_sck++;
@@ -97,12 +98,12 @@ static int handle_set_clock(struct kvm_vcpu *vcpu)
op2 = kvm_s390_get_base_disp_s(vcpu, &ar);
if (op2 & 7) /* Operand must be on a doubleword boundary */
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
- rc = read_guest(vcpu, op2, ar, &val, sizeof(val));
+ rc = read_guest(vcpu, op2, ar, &gtod.tod, sizeof(gtod.tod));
if (rc)
return kvm_s390_inject_prog_cond(vcpu, rc);
- VCPU_EVENT(vcpu, 3, "SCK: setting guest TOD to 0x%llx", val);
- kvm_s390_set_tod_clock(vcpu->kvm, val);
+ VCPU_EVENT(vcpu, 3, "SCK: setting guest TOD to 0x%llx", gtod.tod);
+ kvm_s390_set_tod_clock(vcpu->kvm, &gtod);
kvm_s390_set_psw_cc(vcpu, 0);
return 0;
@@ -795,55 +796,60 @@ out:
return rc;
}
-static const intercept_handler_t b2_handlers[256] = {
- [0x02] = handle_stidp,
- [0x04] = handle_set_clock,
- [0x10] = handle_set_prefix,
- [0x11] = handle_store_prefix,
- [0x12] = handle_store_cpu_address,
- [0x14] = kvm_s390_handle_vsie,
- [0x21] = handle_ipte_interlock,
- [0x29] = handle_iske,
- [0x2a] = handle_rrbe,
- [0x2b] = handle_sske,
- [0x2c] = handle_test_block,
- [0x30] = handle_io_inst,
- [0x31] = handle_io_inst,
- [0x32] = handle_io_inst,
- [0x33] = handle_io_inst,
- [0x34] = handle_io_inst,
- [0x35] = handle_io_inst,
- [0x36] = handle_io_inst,
- [0x37] = handle_io_inst,
- [0x38] = handle_io_inst,
- [0x39] = handle_io_inst,
- [0x3a] = handle_io_inst,
- [0x3b] = handle_io_inst,
- [0x3c] = handle_io_inst,
- [0x50] = handle_ipte_interlock,
- [0x56] = handle_sthyi,
- [0x5f] = handle_io_inst,
- [0x74] = handle_io_inst,
- [0x76] = handle_io_inst,
- [0x7d] = handle_stsi,
- [0xb1] = handle_stfl,
- [0xb2] = handle_lpswe,
-};
-
int kvm_s390_handle_b2(struct kvm_vcpu *vcpu)
{
- intercept_handler_t handler;
-
- /*
- * A lot of B2 instructions are priviledged. Here we check for
- * the privileged ones, that we can handle in the kernel.
- * Anything else goes to userspace.
- */
- handler = b2_handlers[vcpu->arch.sie_block->ipa & 0x00ff];
- if (handler)
- return handler(vcpu);
-
- return -EOPNOTSUPP;
+ switch (vcpu->arch.sie_block->ipa & 0x00ff) {
+ case 0x02:
+ return handle_stidp(vcpu);
+ case 0x04:
+ return handle_set_clock(vcpu);
+ case 0x10:
+ return handle_set_prefix(vcpu);
+ case 0x11:
+ return handle_store_prefix(vcpu);
+ case 0x12:
+ return handle_store_cpu_address(vcpu);
+ case 0x14:
+ return kvm_s390_handle_vsie(vcpu);
+ case 0x21:
+ case 0x50:
+ return handle_ipte_interlock(vcpu);
+ case 0x29:
+ return handle_iske(vcpu);
+ case 0x2a:
+ return handle_rrbe(vcpu);
+ case 0x2b:
+ return handle_sske(vcpu);
+ case 0x2c:
+ return handle_test_block(vcpu);
+ case 0x30:
+ case 0x31:
+ case 0x32:
+ case 0x33:
+ case 0x34:
+ case 0x35:
+ case 0x36:
+ case 0x37:
+ case 0x38:
+ case 0x39:
+ case 0x3a:
+ case 0x3b:
+ case 0x3c:
+ case 0x5f:
+ case 0x74:
+ case 0x76:
+ return handle_io_inst(vcpu);
+ case 0x56:
+ return handle_sthyi(vcpu);
+ case 0x7d:
+ return handle_stsi(vcpu);
+ case 0xb1:
+ return handle_stfl(vcpu);
+ case 0xb2:
+ return handle_lpswe(vcpu);
+ default:
+ return -EOPNOTSUPP;
+ }
}
static int handle_epsw(struct kvm_vcpu *vcpu)
@@ -1105,25 +1111,22 @@ static int handle_essa(struct kvm_vcpu *vcpu)
return 0;
}
-static const intercept_handler_t b9_handlers[256] = {
- [0x8a] = handle_ipte_interlock,
- [0x8d] = handle_epsw,
- [0x8e] = handle_ipte_interlock,
- [0x8f] = handle_ipte_interlock,
- [0xab] = handle_essa,
- [0xaf] = handle_pfmf,
-};
-
int kvm_s390_handle_b9(struct kvm_vcpu *vcpu)
{
- intercept_handler_t handler;
-
- /* This is handled just as for the B2 instructions. */
- handler = b9_handlers[vcpu->arch.sie_block->ipa & 0x00ff];
- if (handler)
- return handler(vcpu);
-
- return -EOPNOTSUPP;
+ switch (vcpu->arch.sie_block->ipa & 0x00ff) {
+ case 0x8a:
+ case 0x8e:
+ case 0x8f:
+ return handle_ipte_interlock(vcpu);
+ case 0x8d:
+ return handle_epsw(vcpu);
+ case 0xab:
+ return handle_essa(vcpu);
+ case 0xaf:
+ return handle_pfmf(vcpu);
+ default:
+ return -EOPNOTSUPP;
+ }
}
int kvm_s390_handle_lctl(struct kvm_vcpu *vcpu)
@@ -1271,22 +1274,20 @@ static int handle_stctg(struct kvm_vcpu *vcpu)
return rc ? kvm_s390_inject_prog_cond(vcpu, rc) : 0;
}
-static const intercept_handler_t eb_handlers[256] = {
- [0x2f] = handle_lctlg,
- [0x25] = handle_stctg,
- [0x60] = handle_ri,
- [0x61] = handle_ri,
- [0x62] = handle_ri,
-};
-
int kvm_s390_handle_eb(struct kvm_vcpu *vcpu)
{
- intercept_handler_t handler;
-
- handler = eb_handlers[vcpu->arch.sie_block->ipb & 0xff];
- if (handler)
- return handler(vcpu);
- return -EOPNOTSUPP;
+ switch (vcpu->arch.sie_block->ipb & 0x000000ff) {
+ case 0x25:
+ return handle_stctg(vcpu);
+ case 0x2f:
+ return handle_lctlg(vcpu);
+ case 0x60:
+ case 0x61:
+ case 0x62:
+ return handle_ri(vcpu);
+ default:
+ return -EOPNOTSUPP;
+ }
}
static int handle_tprot(struct kvm_vcpu *vcpu)
@@ -1346,10 +1347,12 @@ out_unlock:
int kvm_s390_handle_e5(struct kvm_vcpu *vcpu)
{
- /* For e5xx... instructions we only handle TPROT */
- if ((vcpu->arch.sie_block->ipa & 0x00ff) == 0x01)
+ switch (vcpu->arch.sie_block->ipa & 0x00ff) {
+ case 0x01:
return handle_tprot(vcpu);
- return -EOPNOTSUPP;
+ default:
+ return -EOPNOTSUPP;
+ }
}
static int handle_sckpf(struct kvm_vcpu *vcpu)
@@ -1380,17 +1383,14 @@ static int handle_ptff(struct kvm_vcpu *vcpu)
return 0;
}
-static const intercept_handler_t x01_handlers[256] = {
- [0x04] = handle_ptff,
- [0x07] = handle_sckpf,
-};
-
int kvm_s390_handle_01(struct kvm_vcpu *vcpu)
{
- intercept_handler_t handler;
-
- handler = x01_handlers[vcpu->arch.sie_block->ipa & 0x00ff];
- if (handler)
- return handler(vcpu);
- return -EOPNOTSUPP;
+ switch (vcpu->arch.sie_block->ipa & 0x00ff) {
+ case 0x04:
+ return handle_ptff(vcpu);
+ case 0x07:
+ return handle_sckpf(vcpu);
+ default:
+ return -EOPNOTSUPP;
+ }
}
diff --git a/arch/s390/kvm/vsie.c b/arch/s390/kvm/vsie.c
index ec772700ff96..8961e3970901 100644
--- a/arch/s390/kvm/vsie.c
+++ b/arch/s390/kvm/vsie.c
@@ -821,6 +821,7 @@ static int do_vsie_run(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page)
{
struct kvm_s390_sie_block *scb_s = &vsie_page->scb_s;
struct kvm_s390_sie_block *scb_o = vsie_page->scb_o;
+ int guest_bp_isolation;
int rc;
handle_last_fault(vcpu, vsie_page);
@@ -831,6 +832,20 @@ static int do_vsie_run(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page)
s390_handle_mcck();
srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
+
+ /* save current guest state of bp isolation override */
+ guest_bp_isolation = test_thread_flag(TIF_ISOLATE_BP_GUEST);
+
+ /*
+ * The guest is running with BPBC, so we have to force it on for our
+ * nested guest. This is done by enabling BPBC globally, so the BPBC
+ * control in the SCB (which the nested guest can modify) is simply
+ * ignored.
+ */
+ if (test_kvm_facility(vcpu->kvm, 82) &&
+ vcpu->arch.sie_block->fpf & FPF_BPBC)
+ set_thread_flag(TIF_ISOLATE_BP_GUEST);
+
local_irq_disable();
guest_enter_irqoff();
local_irq_enable();
@@ -840,6 +855,11 @@ static int do_vsie_run(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page)
local_irq_disable();
guest_exit_irqoff();
local_irq_enable();
+
+ /* restore guest state for bp isolation override */
+ if (!guest_bp_isolation)
+ clear_thread_flag(TIF_ISOLATE_BP_GUEST);
+
vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
if (rc == -EINTR) {
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-21 01:25:47 +0100