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authorLinus Torvalds <torvalds@linux-foundation.org>2019-03-15 15:00:28 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2019-03-15 15:00:28 -0700
commit636deed6c0bc137a7c4f4a97ae1fcf0ad75323da (patch)
tree7bd27189b8e30e3c1466f7730831a08db65f8646 /arch/s390/kvm
parentaa2e3ac64ace127f403be85aa4d6015b859385f2 (diff)
parent4a605bc08e98381d8df61c30a4acb2eac15eb7da (diff)
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull KVM updates from Paolo Bonzini: "ARM: - some cleanups - direct physical timer assignment - cache sanitization for 32-bit guests s390: - interrupt cleanup - introduction of the Guest Information Block - preparation for processor subfunctions in cpu models PPC: - bug fixes and improvements, especially related to machine checks and protection keys x86: - many, many cleanups, including removing a bunch of MMU code for unnecessary optimizations - AVIC fixes Generic: - memcg accounting" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (147 commits) kvm: vmx: fix formatting of a comment KVM: doc: Document the life cycle of a VM and its resources MAINTAINERS: Add KVM selftests to existing KVM entry Revert "KVM/MMU: Flush tlb directly in the kvm_zap_gfn_range()" KVM: PPC: Book3S: Add count cache flush parameters to kvmppc_get_cpu_char() KVM: PPC: Fix compilation when KVM is not enabled KVM: Minor cleanups for kvm_main.c KVM: s390: add debug logging for cpu model subfunctions KVM: s390: implement subfunction processor calls arm64: KVM: Fix architecturally invalid reset value for FPEXC32_EL2 KVM: arm/arm64: Remove unused timer variable KVM: PPC: Book3S: Improve KVM reference counting KVM: PPC: Book3S HV: Fix build failure without IOMMU support Revert "KVM: Eliminate extra function calls in kvm_get_dirty_log_protect()" x86: kvmguest: use TSC clocksource if invariant TSC is exposed KVM: Never start grow vCPU halt_poll_ns from value below halt_poll_ns_grow_start KVM: Expose the initial start value in grow_halt_poll_ns() as a module parameter KVM: grow_halt_poll_ns() should never shrink vCPU halt_poll_ns KVM: x86/mmu: Consolidate kvm_mmu_zap_all() and kvm_mmu_zap_mmio_sptes() KVM: x86/mmu: WARN if zapping a MMIO spte results in zapping children ...
Diffstat (limited to 'arch/s390/kvm')
-rw-r--r--arch/s390/kvm/interrupt.c431
-rw-r--r--arch/s390/kvm/kvm-s390.c190
-rw-r--r--arch/s390/kvm/kvm-s390.h4
3 files changed, 566 insertions, 59 deletions
diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c
index fcb55b02990e..82162867f378 100644
--- a/arch/s390/kvm/interrupt.c
+++ b/arch/s390/kvm/interrupt.c
@@ -7,6 +7,9 @@
* Author(s): Carsten Otte <cotte@de.ibm.com>
*/
+#define KMSG_COMPONENT "kvm-s390"
+#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+
#include <linux/interrupt.h>
#include <linux/kvm_host.h>
#include <linux/hrtimer.h>
@@ -23,6 +26,7 @@
#include <asm/gmap.h>
#include <asm/switch_to.h>
#include <asm/nmi.h>
+#include <asm/airq.h>
#include "kvm-s390.h"
#include "gaccess.h"
#include "trace-s390.h"
@@ -31,6 +35,8 @@
#define PFAULT_DONE 0x0680
#define VIRTIO_PARAM 0x0d00
+static struct kvm_s390_gib *gib;
+
/* handle external calls via sigp interpretation facility */
static int sca_ext_call_pending(struct kvm_vcpu *vcpu, int *src_id)
{
@@ -217,22 +223,100 @@ static inline u8 int_word_to_isc(u32 int_word)
*/
#define IPM_BIT_OFFSET (offsetof(struct kvm_s390_gisa, ipm) * BITS_PER_BYTE)
-static inline void kvm_s390_gisa_set_ipm_gisc(struct kvm_s390_gisa *gisa, u32 gisc)
+/**
+ * gisa_set_iam - change the GISA interruption alert mask
+ *
+ * @gisa: gisa to operate on
+ * @iam: new IAM value to use
+ *
+ * Change the IAM atomically with the next alert address and the IPM
+ * of the GISA if the GISA is not part of the GIB alert list. All three
+ * fields are located in the first long word of the GISA.
+ *
+ * Returns: 0 on success
+ * -EBUSY in case the gisa is part of the alert list
+ */
+static inline int gisa_set_iam(struct kvm_s390_gisa *gisa, u8 iam)
+{
+ u64 word, _word;
+
+ do {
+ word = READ_ONCE(gisa->u64.word[0]);
+ if ((u64)gisa != word >> 32)
+ return -EBUSY;
+ _word = (word & ~0xffUL) | iam;
+ } while (cmpxchg(&gisa->u64.word[0], word, _word) != word);
+
+ return 0;
+}
+
+/**
+ * gisa_clear_ipm - clear the GISA interruption pending mask
+ *
+ * @gisa: gisa to operate on
+ *
+ * Clear the IPM atomically with the next alert address and the IAM
+ * of the GISA unconditionally. All three fields are located in the
+ * first long word of the GISA.
+ */
+static inline void gisa_clear_ipm(struct kvm_s390_gisa *gisa)
+{
+ u64 word, _word;
+
+ do {
+ word = READ_ONCE(gisa->u64.word[0]);
+ _word = word & ~(0xffUL << 24);
+ } while (cmpxchg(&gisa->u64.word[0], word, _word) != word);
+}
+
+/**
+ * gisa_get_ipm_or_restore_iam - return IPM or restore GISA IAM
+ *
+ * @gi: gisa interrupt struct to work on
+ *
+ * Atomically restores the interruption alert mask if none of the
+ * relevant ISCs are pending and return the IPM.
+ *
+ * Returns: the relevant pending ISCs
+ */
+static inline u8 gisa_get_ipm_or_restore_iam(struct kvm_s390_gisa_interrupt *gi)
+{
+ u8 pending_mask, alert_mask;
+ u64 word, _word;
+
+ do {
+ word = READ_ONCE(gi->origin->u64.word[0]);
+ alert_mask = READ_ONCE(gi->alert.mask);
+ pending_mask = (u8)(word >> 24) & alert_mask;
+ if (pending_mask)
+ return pending_mask;
+ _word = (word & ~0xffUL) | alert_mask;
+ } while (cmpxchg(&gi->origin->u64.word[0], word, _word) != word);
+
+ return 0;
+}
+
+static inline int gisa_in_alert_list(struct kvm_s390_gisa *gisa)
+{
+ return READ_ONCE(gisa->next_alert) != (u32)(u64)gisa;
+}
+
+static inline void gisa_set_ipm_gisc(struct kvm_s390_gisa *gisa, u32 gisc)
{
set_bit_inv(IPM_BIT_OFFSET + gisc, (unsigned long *) gisa);
}
-static inline u8 kvm_s390_gisa_get_ipm(struct kvm_s390_gisa *gisa)
+static inline u8 gisa_get_ipm(struct kvm_s390_gisa *gisa)
{
return READ_ONCE(gisa->ipm);
}
-static inline void kvm_s390_gisa_clear_ipm_gisc(struct kvm_s390_gisa *gisa, u32 gisc)
+static inline void gisa_clear_ipm_gisc(struct kvm_s390_gisa *gisa, u32 gisc)
{
clear_bit_inv(IPM_BIT_OFFSET + gisc, (unsigned long *) gisa);
}
-static inline int kvm_s390_gisa_tac_ipm_gisc(struct kvm_s390_gisa *gisa, u32 gisc)
+static inline int gisa_tac_ipm_gisc(struct kvm_s390_gisa *gisa, u32 gisc)
{
return test_and_clear_bit_inv(IPM_BIT_OFFSET + gisc, (unsigned long *) gisa);
}
@@ -245,8 +329,13 @@ static inline unsigned long pending_irqs_no_gisa(struct kvm_vcpu *vcpu)
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;
+ struct kvm_s390_gisa_interrupt *gi = &vcpu->kvm->arch.gisa_int;
+ unsigned long pending_mask;
+
+ pending_mask = pending_irqs_no_gisa(vcpu);
+ if (gi->origin)
+ pending_mask |= gisa_get_ipm(gi->origin) << IRQ_PEND_IO_ISC_7;
+ return pending_mask;
}
static inline int isc_to_irq_type(unsigned long isc)
@@ -318,13 +407,13 @@ static unsigned long deliverable_irqs(struct kvm_vcpu *vcpu)
static void __set_cpu_idle(struct kvm_vcpu *vcpu)
{
kvm_s390_set_cpuflags(vcpu, CPUSTAT_WAIT);
- set_bit(vcpu->vcpu_id, vcpu->kvm->arch.float_int.idle_mask);
+ set_bit(vcpu->vcpu_id, vcpu->kvm->arch.idle_mask);
}
static void __unset_cpu_idle(struct kvm_vcpu *vcpu)
{
kvm_s390_clear_cpuflags(vcpu, CPUSTAT_WAIT);
- clear_bit(vcpu->vcpu_id, vcpu->kvm->arch.float_int.idle_mask);
+ clear_bit(vcpu->vcpu_id, vcpu->kvm->arch.idle_mask);
}
static void __reset_intercept_indicators(struct kvm_vcpu *vcpu)
@@ -345,7 +434,7 @@ static void set_intercept_indicators_io(struct kvm_vcpu *vcpu)
{
if (!(pending_irqs_no_gisa(vcpu) & IRQ_PEND_IO_MASK))
return;
- else if (psw_ioint_disabled(vcpu))
+ if (psw_ioint_disabled(vcpu))
kvm_s390_set_cpuflags(vcpu, CPUSTAT_IO_INT);
else
vcpu->arch.sie_block->lctl |= LCTL_CR6;
@@ -353,7 +442,7 @@ static void set_intercept_indicators_io(struct kvm_vcpu *vcpu)
static void set_intercept_indicators_ext(struct kvm_vcpu *vcpu)
{
- if (!(pending_irqs(vcpu) & IRQ_PEND_EXT_MASK))
+ if (!(pending_irqs_no_gisa(vcpu) & IRQ_PEND_EXT_MASK))
return;
if (psw_extint_disabled(vcpu))
kvm_s390_set_cpuflags(vcpu, CPUSTAT_EXT_INT);
@@ -363,7 +452,7 @@ static void set_intercept_indicators_ext(struct kvm_vcpu *vcpu)
static void set_intercept_indicators_mchk(struct kvm_vcpu *vcpu)
{
- if (!(pending_irqs(vcpu) & IRQ_PEND_MCHK_MASK))
+ if (!(pending_irqs_no_gisa(vcpu) & IRQ_PEND_MCHK_MASK))
return;
if (psw_mchk_disabled(vcpu))
vcpu->arch.sie_block->ictl |= ICTL_LPSW;
@@ -956,6 +1045,7 @@ static int __must_check __deliver_io(struct kvm_vcpu *vcpu,
{
struct list_head *isc_list;
struct kvm_s390_float_interrupt *fi;
+ struct kvm_s390_gisa_interrupt *gi = &vcpu->kvm->arch.gisa_int;
struct kvm_s390_interrupt_info *inti = NULL;
struct kvm_s390_io_info io;
u32 isc;
@@ -998,8 +1088,7 @@ static int __must_check __deliver_io(struct kvm_vcpu *vcpu,
goto out;
}
- if (vcpu->kvm->arch.gisa &&
- kvm_s390_gisa_tac_ipm_gisc(vcpu->kvm->arch.gisa, isc)) {
+ if (gi->origin && gisa_tac_ipm_gisc(gi->origin, isc)) {
/*
* in case an adapter interrupt was not delivered
* in SIE context KVM will handle the delivery
@@ -1089,6 +1178,7 @@ static u64 __calculate_sltime(struct kvm_vcpu *vcpu)
int kvm_s390_handle_wait(struct kvm_vcpu *vcpu)
{
+ struct kvm_s390_gisa_interrupt *gi = &vcpu->kvm->arch.gisa_int;
u64 sltime;
vcpu->stat.exit_wait_state++;
@@ -1102,6 +1192,11 @@ int kvm_s390_handle_wait(struct kvm_vcpu *vcpu)
return -EOPNOTSUPP; /* disabled wait */
}
+ if (gi->origin &&
+ (gisa_get_ipm_or_restore_iam(gi) &
+ vcpu->arch.sie_block->gcr[6] >> 24))
+ return 0;
+
if (!ckc_interrupts_enabled(vcpu) &&
!cpu_timer_interrupts_enabled(vcpu)) {
VCPU_EVENT(vcpu, 3, "%s", "enabled wait w/o timer");
@@ -1533,18 +1628,19 @@ static struct kvm_s390_interrupt_info *get_top_io_int(struct kvm *kvm,
static int get_top_gisa_isc(struct kvm *kvm, u64 isc_mask, u32 schid)
{
+ struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int;
unsigned long active_mask;
int isc;
if (schid)
goto out;
- if (!kvm->arch.gisa)
+ if (!gi->origin)
goto out;
- active_mask = (isc_mask & kvm_s390_gisa_get_ipm(kvm->arch.gisa) << 24) << 32;
+ active_mask = (isc_mask & gisa_get_ipm(gi->origin) << 24) << 32;
while (active_mask) {
isc = __fls(active_mask) ^ (BITS_PER_LONG - 1);
- if (kvm_s390_gisa_tac_ipm_gisc(kvm->arch.gisa, isc))
+ if (gisa_tac_ipm_gisc(gi->origin, isc))
return isc;
clear_bit_inv(isc, &active_mask);
}
@@ -1567,6 +1663,7 @@ out:
struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm,
u64 isc_mask, u32 schid)
{
+ struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int;
struct kvm_s390_interrupt_info *inti, *tmp_inti;
int isc;
@@ -1584,7 +1681,7 @@ struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm,
/* both types of interrupts present */
if (int_word_to_isc(inti->io.io_int_word) <= isc) {
/* classical IO int with higher priority */
- kvm_s390_gisa_set_ipm_gisc(kvm->arch.gisa, isc);
+ gisa_set_ipm_gisc(gi->origin, isc);
goto out;
}
gisa_out:
@@ -1596,7 +1693,7 @@ gisa_out:
kvm_s390_reinject_io_int(kvm, inti);
inti = tmp_inti;
} else
- kvm_s390_gisa_set_ipm_gisc(kvm->arch.gisa, isc);
+ gisa_set_ipm_gisc(gi->origin, isc);
out:
return inti;
}
@@ -1685,6 +1782,7 @@ static int __inject_float_mchk(struct kvm *kvm,
static int __inject_io(struct kvm *kvm, struct kvm_s390_interrupt_info *inti)
{
+ struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int;
struct kvm_s390_float_interrupt *fi;
struct list_head *list;
int isc;
@@ -1692,9 +1790,9 @@ static int __inject_io(struct kvm *kvm, struct kvm_s390_interrupt_info *inti)
kvm->stat.inject_io++;
isc = int_word_to_isc(inti->io.io_int_word);
- if (kvm->arch.gisa && inti->type & KVM_S390_INT_IO_AI_MASK) {
+ if (gi->origin && inti->type & KVM_S390_INT_IO_AI_MASK) {
VM_EVENT(kvm, 4, "%s isc %1u", "inject: I/O (AI/gisa)", isc);
- kvm_s390_gisa_set_ipm_gisc(kvm->arch.gisa, isc);
+ gisa_set_ipm_gisc(gi->origin, isc);
kfree(inti);
return 0;
}
@@ -1726,7 +1824,6 @@ static int __inject_io(struct kvm *kvm, struct kvm_s390_interrupt_info *inti)
*/
static void __floating_irq_kick(struct kvm *kvm, u64 type)
{
- struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
struct kvm_vcpu *dst_vcpu;
int sigcpu, online_vcpus, nr_tries = 0;
@@ -1735,11 +1832,11 @@ static void __floating_irq_kick(struct kvm *kvm, u64 type)
return;
/* find idle VCPUs first, then round robin */
- sigcpu = find_first_bit(fi->idle_mask, online_vcpus);
+ sigcpu = find_first_bit(kvm->arch.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;
+ sigcpu = kvm->arch.float_int.next_rr_cpu++;
+ kvm->arch.float_int.next_rr_cpu %= online_vcpus;
/* avoid endless loops if all vcpus are stopped */
if (nr_tries++ >= online_vcpus)
return;
@@ -1753,7 +1850,8 @@ 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:
- if (!(type & KVM_S390_INT_IO_AI_MASK && kvm->arch.gisa))
+ if (!(type & KVM_S390_INT_IO_AI_MASK &&
+ kvm->arch.gisa_int.origin))
kvm_s390_set_cpuflags(dst_vcpu, CPUSTAT_IO_INT);
break;
default:
@@ -2003,6 +2101,7 @@ void kvm_s390_clear_float_irqs(struct kvm *kvm)
static int get_all_floating_irqs(struct kvm *kvm, u8 __user *usrbuf, u64 len)
{
+ struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int;
struct kvm_s390_interrupt_info *inti;
struct kvm_s390_float_interrupt *fi;
struct kvm_s390_irq *buf;
@@ -2026,15 +2125,14 @@ static int get_all_floating_irqs(struct kvm *kvm, u8 __user *usrbuf, u64 len)
max_irqs = len / sizeof(struct kvm_s390_irq);
- if (kvm->arch.gisa &&
- kvm_s390_gisa_get_ipm(kvm->arch.gisa)) {
+ if (gi->origin && gisa_get_ipm(gi->origin)) {
for (i = 0; i <= MAX_ISC; i++) {
if (n == max_irqs) {
/* signal userspace to try again */
ret = -ENOMEM;
goto out_nolock;
}
- if (kvm_s390_gisa_tac_ipm_gisc(kvm->arch.gisa, i)) {
+ if (gisa_tac_ipm_gisc(gi->origin, i)) {
irq = (struct kvm_s390_irq *) &buf[n];
irq->type = KVM_S390_INT_IO(1, 0, 0, 0);
irq->u.io.io_int_word = isc_to_int_word(i);
@@ -2831,7 +2929,7 @@ static void store_local_irq(struct kvm_s390_local_interrupt *li,
int kvm_s390_get_irq_state(struct kvm_vcpu *vcpu, __u8 __user *buf, int len)
{
int scn;
- unsigned long sigp_emerg_pending[BITS_TO_LONGS(KVM_MAX_VCPUS)];
+ DECLARE_BITMAP(sigp_emerg_pending, KVM_MAX_VCPUS);
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
unsigned long pending_irqs;
struct kvm_s390_irq irq;
@@ -2884,27 +2982,278 @@ int kvm_s390_get_irq_state(struct kvm_vcpu *vcpu, __u8 __user *buf, int len)
return n;
}
-void kvm_s390_gisa_clear(struct kvm *kvm)
+static void __airqs_kick_single_vcpu(struct kvm *kvm, u8 deliverable_mask)
{
- if (kvm->arch.gisa) {
- memset(kvm->arch.gisa, 0, sizeof(struct kvm_s390_gisa));
- kvm->arch.gisa->next_alert = (u32)(u64)kvm->arch.gisa;
- VM_EVENT(kvm, 3, "gisa 0x%pK cleared", kvm->arch.gisa);
+ int vcpu_id, online_vcpus = atomic_read(&kvm->online_vcpus);
+ struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int;
+ struct kvm_vcpu *vcpu;
+
+ for_each_set_bit(vcpu_id, kvm->arch.idle_mask, online_vcpus) {
+ vcpu = kvm_get_vcpu(kvm, vcpu_id);
+ if (psw_ioint_disabled(vcpu))
+ continue;
+ deliverable_mask &= (u8)(vcpu->arch.sie_block->gcr[6] >> 24);
+ if (deliverable_mask) {
+ /* lately kicked but not yet running */
+ if (test_and_set_bit(vcpu_id, gi->kicked_mask))
+ return;
+ kvm_s390_vcpu_wakeup(vcpu);
+ return;
+ }
}
}
+static enum hrtimer_restart gisa_vcpu_kicker(struct hrtimer *timer)
+{
+ struct kvm_s390_gisa_interrupt *gi =
+ container_of(timer, struct kvm_s390_gisa_interrupt, timer);
+ struct kvm *kvm =
+ container_of(gi->origin, struct sie_page2, gisa)->kvm;
+ u8 pending_mask;
+
+ pending_mask = gisa_get_ipm_or_restore_iam(gi);
+ if (pending_mask) {
+ __airqs_kick_single_vcpu(kvm, pending_mask);
+ hrtimer_forward_now(timer, ns_to_ktime(gi->expires));
+ return HRTIMER_RESTART;
+ };
+
+ return HRTIMER_NORESTART;
+}
+
+#define NULL_GISA_ADDR 0x00000000UL
+#define NONE_GISA_ADDR 0x00000001UL
+#define GISA_ADDR_MASK 0xfffff000UL
+
+static void process_gib_alert_list(void)
+{
+ struct kvm_s390_gisa_interrupt *gi;
+ struct kvm_s390_gisa *gisa;
+ struct kvm *kvm;
+ u32 final, origin = 0UL;
+
+ do {
+ /*
+ * If the NONE_GISA_ADDR is still stored in the alert list
+ * origin, we will leave the outer loop. No further GISA has
+ * been added to the alert list by millicode while processing
+ * the current alert list.
+ */
+ final = (origin & NONE_GISA_ADDR);
+ /*
+ * Cut off the alert list and store the NONE_GISA_ADDR in the
+ * alert list origin to avoid further GAL interruptions.
+ * A new alert list can be build up by millicode in parallel
+ * for guests not in the yet cut-off alert list. When in the
+ * final loop, store the NULL_GISA_ADDR instead. This will re-
+ * enable GAL interruptions on the host again.
+ */
+ origin = xchg(&gib->alert_list_origin,
+ (!final) ? NONE_GISA_ADDR : NULL_GISA_ADDR);
+ /*
+ * Loop through the just cut-off alert list and start the
+ * gisa timers to kick idle vcpus to consume the pending
+ * interruptions asap.
+ */
+ while (origin & GISA_ADDR_MASK) {
+ gisa = (struct kvm_s390_gisa *)(u64)origin;
+ origin = gisa->next_alert;
+ gisa->next_alert = (u32)(u64)gisa;
+ kvm = container_of(gisa, struct sie_page2, gisa)->kvm;
+ gi = &kvm->arch.gisa_int;
+ if (hrtimer_active(&gi->timer))
+ hrtimer_cancel(&gi->timer);
+ hrtimer_start(&gi->timer, 0, HRTIMER_MODE_REL);
+ }
+ } while (!final);
+
+}
+
+void kvm_s390_gisa_clear(struct kvm *kvm)
+{
+ struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int;
+
+ if (!gi->origin)
+ return;
+ gisa_clear_ipm(gi->origin);
+ VM_EVENT(kvm, 3, "gisa 0x%pK cleared", gi->origin);
+}
+
void kvm_s390_gisa_init(struct kvm *kvm)
{
- if (css_general_characteristics.aiv) {
- kvm->arch.gisa = &kvm->arch.sie_page2->gisa;
- VM_EVENT(kvm, 3, "gisa 0x%pK initialized", kvm->arch.gisa);
- kvm_s390_gisa_clear(kvm);
- }
+ struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int;
+
+ if (!css_general_characteristics.aiv)
+ return;
+ gi->origin = &kvm->arch.sie_page2->gisa;
+ gi->alert.mask = 0;
+ spin_lock_init(&gi->alert.ref_lock);
+ gi->expires = 50 * 1000; /* 50 usec */
+ hrtimer_init(&gi->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
+ gi->timer.function = gisa_vcpu_kicker;
+ memset(gi->origin, 0, sizeof(struct kvm_s390_gisa));
+ gi->origin->next_alert = (u32)(u64)gi->origin;
+ VM_EVENT(kvm, 3, "gisa 0x%pK initialized", gi->origin);
}
void kvm_s390_gisa_destroy(struct kvm *kvm)
{
- if (!kvm->arch.gisa)
+ struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int;
+
+ if (!gi->origin)
+ return;
+ if (gi->alert.mask)
+ KVM_EVENT(3, "vm 0x%pK has unexpected iam 0x%02x",
+ kvm, gi->alert.mask);
+ while (gisa_in_alert_list(gi->origin))
+ cpu_relax();
+ hrtimer_cancel(&gi->timer);
+ gi->origin = NULL;
+}
+
+/**
+ * kvm_s390_gisc_register - register a guest ISC
+ *
+ * @kvm: the kernel vm to work with
+ * @gisc: the guest interruption sub class to register
+ *
+ * The function extends the vm specific alert mask to use.
+ * The effective IAM mask in the GISA is updated as well
+ * in case the GISA is not part of the GIB alert list.
+ * It will be updated latest when the IAM gets restored
+ * by gisa_get_ipm_or_restore_iam().
+ *
+ * Returns: the nonspecific ISC (NISC) the gib alert mechanism
+ * has registered with the channel subsystem.
+ * -ENODEV in case the vm uses no GISA
+ * -ERANGE in case the guest ISC is invalid
+ */
+int kvm_s390_gisc_register(struct kvm *kvm, u32 gisc)
+{
+ struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int;
+
+ if (!gi->origin)
+ return -ENODEV;
+ if (gisc > MAX_ISC)
+ return -ERANGE;
+
+ spin_lock(&gi->alert.ref_lock);
+ gi->alert.ref_count[gisc]++;
+ if (gi->alert.ref_count[gisc] == 1) {
+ gi->alert.mask |= 0x80 >> gisc;
+ gisa_set_iam(gi->origin, gi->alert.mask);
+ }
+ spin_unlock(&gi->alert.ref_lock);
+
+ return gib->nisc;
+}
+EXPORT_SYMBOL_GPL(kvm_s390_gisc_register);
+
+/**
+ * kvm_s390_gisc_unregister - unregister a guest ISC
+ *
+ * @kvm: the kernel vm to work with
+ * @gisc: the guest interruption sub class to register
+ *
+ * The function reduces the vm specific alert mask to use.
+ * The effective IAM mask in the GISA is updated as well
+ * in case the GISA is not part of the GIB alert list.
+ * It will be updated latest when the IAM gets restored
+ * by gisa_get_ipm_or_restore_iam().
+ *
+ * Returns: the nonspecific ISC (NISC) the gib alert mechanism
+ * has registered with the channel subsystem.
+ * -ENODEV in case the vm uses no GISA
+ * -ERANGE in case the guest ISC is invalid
+ * -EINVAL in case the guest ISC is not registered
+ */
+int kvm_s390_gisc_unregister(struct kvm *kvm, u32 gisc)
+{
+ struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int;
+ int rc = 0;
+
+ if (!gi->origin)
+ return -ENODEV;
+ if (gisc > MAX_ISC)
+ return -ERANGE;
+
+ spin_lock(&gi->alert.ref_lock);
+ if (gi->alert.ref_count[gisc] == 0) {
+ rc = -EINVAL;
+ goto out;
+ }
+ gi->alert.ref_count[gisc]--;
+ if (gi->alert.ref_count[gisc] == 0) {
+ gi->alert.mask &= ~(0x80 >> gisc);
+ gisa_set_iam(gi->origin, gi->alert.mask);
+ }
+out:
+ spin_unlock(&gi->alert.ref_lock);
+
+ return rc;
+}
+EXPORT_SYMBOL_GPL(kvm_s390_gisc_unregister);
+
+static void gib_alert_irq_handler(struct airq_struct *airq)
+{
+ inc_irq_stat(IRQIO_GAL);
+ process_gib_alert_list();
+}
+
+static struct airq_struct gib_alert_irq = {
+ .handler = gib_alert_irq_handler,
+ .lsi_ptr = &gib_alert_irq.lsi_mask,
+};
+
+void kvm_s390_gib_destroy(void)
+{
+ if (!gib)
return;
- kvm->arch.gisa = NULL;
+ chsc_sgib(0);
+ unregister_adapter_interrupt(&gib_alert_irq);
+ free_page((unsigned long)gib);
+ gib = NULL;
+}
+
+int kvm_s390_gib_init(u8 nisc)
+{
+ int rc = 0;
+
+ if (!css_general_characteristics.aiv) {
+ KVM_EVENT(3, "%s", "gib not initialized, no AIV facility");
+ goto out;
+ }
+
+ gib = (struct kvm_s390_gib *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
+ if (!gib) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ gib_alert_irq.isc = nisc;
+ if (register_adapter_interrupt(&gib_alert_irq)) {
+ pr_err("Registering the GIB alert interruption handler failed\n");
+ rc = -EIO;
+ goto out_free_gib;
+ }
+
+ gib->nisc = nisc;
+ if (chsc_sgib((u32)(u64)gib)) {
+ pr_err("Associating the GIB with the AIV facility failed\n");
+ free_page((unsigned long)gib);
+ gib = NULL;
+ rc = -EIO;
+ goto out_unreg_gal;
+ }
+
+ KVM_EVENT(3, "gib 0x%pK (nisc=%d) initialized", gib, gib->nisc);
+ goto out;
+
+out_unreg_gal:
+ unregister_adapter_interrupt(&gib_alert_irq);
+out_free_gib:
+ free_page((unsigned long)gib);
+ gib = NULL;
+out:
+ return rc;
}
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index 7f4bc58a53b9..4638303ba6a8 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -432,11 +432,18 @@ int kvm_arch_init(void *opaque)
/* Register floating interrupt controller interface. */
rc = kvm_register_device_ops(&kvm_flic_ops, KVM_DEV_TYPE_FLIC);
if (rc) {
- pr_err("Failed to register FLIC rc=%d\n", rc);
+ pr_err("A FLIC registration call failed with rc=%d\n", rc);
goto out_debug_unreg;
}
+
+ rc = kvm_s390_gib_init(GAL_ISC);
+ if (rc)
+ goto out_gib_destroy;
+
return 0;
+out_gib_destroy:
+ kvm_s390_gib_destroy();
out_debug_unreg:
debug_unregister(kvm_s390_dbf);
return rc;
@@ -444,6 +451,7 @@ out_debug_unreg:
void kvm_arch_exit(void)
{
+ kvm_s390_gib_destroy();
debug_unregister(kvm_s390_dbf);
}
@@ -1258,11 +1266,65 @@ static int kvm_s390_set_processor_feat(struct kvm *kvm,
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;
+ mutex_lock(&kvm->lock);
+ if (kvm->created_vcpus) {
+ mutex_unlock(&kvm->lock);
+ return -EBUSY;
+ }
+
+ if (copy_from_user(&kvm->arch.model.subfuncs, (void __user *)attr->addr,
+ sizeof(struct kvm_s390_vm_cpu_subfunc))) {
+ mutex_unlock(&kvm->lock);
+ return -EFAULT;
+ }
+ mutex_unlock(&kvm->lock);
+
+ VM_EVENT(kvm, 3, "SET: guest PLO subfunc 0x%16.16lx.%16.16lx.%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm->arch.model.subfuncs.plo)[0],
+ ((unsigned long *) &kvm->arch.model.subfuncs.plo)[1],
+ ((unsigned long *) &kvm->arch.model.subfuncs.plo)[2],
+ ((unsigned long *) &kvm->arch.model.subfuncs.plo)[3]);
+ VM_EVENT(kvm, 3, "SET: guest PTFF subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm->arch.model.subfuncs.ptff)[0],
+ ((unsigned long *) &kvm->arch.model.subfuncs.ptff)[1]);
+ VM_EVENT(kvm, 3, "SET: guest KMAC subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm->arch.model.subfuncs.kmac)[0],
+ ((unsigned long *) &kvm->arch.model.subfuncs.kmac)[1]);
+ VM_EVENT(kvm, 3, "SET: guest KMC subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm->arch.model.subfuncs.kmc)[0],
+ ((unsigned long *) &kvm->arch.model.subfuncs.kmc)[1]);
+ VM_EVENT(kvm, 3, "SET: guest KM subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm->arch.model.subfuncs.km)[0],
+ ((unsigned long *) &kvm->arch.model.subfuncs.km)[1]);
+ VM_EVENT(kvm, 3, "SET: guest KIMD subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm->arch.model.subfuncs.kimd)[0],
+ ((unsigned long *) &kvm->arch.model.subfuncs.kimd)[1]);
+ VM_EVENT(kvm, 3, "SET: guest KLMD subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm->arch.model.subfuncs.klmd)[0],
+ ((unsigned long *) &kvm->arch.model.subfuncs.klmd)[1]);
+ VM_EVENT(kvm, 3, "SET: guest PCKMO subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm->arch.model.subfuncs.pckmo)[0],
+ ((unsigned long *) &kvm->arch.model.subfuncs.pckmo)[1]);
+ VM_EVENT(kvm, 3, "SET: guest KMCTR subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm->arch.model.subfuncs.kmctr)[0],
+ ((unsigned long *) &kvm->arch.model.subfuncs.kmctr)[1]);
+ VM_EVENT(kvm, 3, "SET: guest KMF subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm->arch.model.subfuncs.kmf)[0],
+ ((unsigned long *) &kvm->arch.model.subfuncs.kmf)[1]);
+ VM_EVENT(kvm, 3, "SET: guest KMO subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm->arch.model.subfuncs.kmo)[0],
+ ((unsigned long *) &kvm->arch.model.subfuncs.kmo)[1]);
+ VM_EVENT(kvm, 3, "SET: guest PCC subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm->arch.model.subfuncs.pcc)[0],
+ ((unsigned long *) &kvm->arch.model.subfuncs.pcc)[1]);
+ VM_EVENT(kvm, 3, "SET: guest PPNO subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm->arch.model.subfuncs.ppno)[0],
+ ((unsigned long *) &kvm->arch.model.subfuncs.ppno)[1]);
+ VM_EVENT(kvm, 3, "SET: guest KMA subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm->arch.model.subfuncs.kma)[0],
+ ((unsigned long *) &kvm->arch.model.subfuncs.kma)[1]);
+
+ return 0;
}
static int kvm_s390_set_cpu_model(struct kvm *kvm, struct kvm_device_attr *attr)
@@ -1381,12 +1443,56 @@ static int kvm_s390_get_machine_feat(struct kvm *kvm,
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;
+ if (copy_to_user((void __user *)attr->addr, &kvm->arch.model.subfuncs,
+ sizeof(struct kvm_s390_vm_cpu_subfunc)))
+ return -EFAULT;
+
+ VM_EVENT(kvm, 3, "GET: guest PLO subfunc 0x%16.16lx.%16.16lx.%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm->arch.model.subfuncs.plo)[0],
+ ((unsigned long *) &kvm->arch.model.subfuncs.plo)[1],
+ ((unsigned long *) &kvm->arch.model.subfuncs.plo)[2],
+ ((unsigned long *) &kvm->arch.model.subfuncs.plo)[3]);
+ VM_EVENT(kvm, 3, "GET: guest PTFF subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm->arch.model.subfuncs.ptff)[0],
+ ((unsigned long *) &kvm->arch.model.subfuncs.ptff)[1]);
+ VM_EVENT(kvm, 3, "GET: guest KMAC subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm->arch.model.subfuncs.kmac)[0],
+ ((unsigned long *) &kvm->arch.model.subfuncs.kmac)[1]);
+ VM_EVENT(kvm, 3, "GET: guest KMC subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm->arch.model.subfuncs.kmc)[0],
+ ((unsigned long *) &kvm->arch.model.subfuncs.kmc)[1]);
+ VM_EVENT(kvm, 3, "GET: guest KM subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm->arch.model.subfuncs.km)[0],
+ ((unsigned long *) &kvm->arch.model.subfuncs.km)[1]);
+ VM_EVENT(kvm, 3, "GET: guest KIMD subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm->arch.model.subfuncs.kimd)[0],
+ ((unsigned long *) &kvm->arch.model.subfuncs.kimd)[1]);
+ VM_EVENT(kvm, 3, "GET: guest KLMD subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm->arch.model.subfuncs.klmd)[0],
+ ((unsigned long *) &kvm->arch.model.subfuncs.klmd)[1]);
+ VM_EVENT(kvm, 3, "GET: guest PCKMO subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm->arch.model.subfuncs.pckmo)[0],
+ ((unsigned long *) &kvm->arch.model.subfuncs.pckmo)[1]);
+ VM_EVENT(kvm, 3, "GET: guest KMCTR subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm->arch.model.subfuncs.kmctr)[0],
+ ((unsigned long *) &kvm->arch.model.subfuncs.kmctr)[1]);
+ VM_EVENT(kvm, 3, "GET: guest KMF subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm->arch.model.subfuncs.kmf)[0],
+ ((unsigned long *) &kvm->arch.model.subfuncs.kmf)[1]);
+ VM_EVENT(kvm, 3, "GET: guest KMO subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm->arch.model.subfuncs.kmo)[0],
+ ((unsigned long *) &kvm->arch.model.subfuncs.kmo)[1]);
+ VM_EVENT(kvm, 3, "GET: guest PCC subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm->arch.model.subfuncs.pcc)[0],
+ ((unsigned long *) &kvm->arch.model.subfuncs.pcc)[1]);
+ VM_EVENT(kvm, 3, "GET: guest PPNO subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm->arch.model.subfuncs.ppno)[0],
+ ((unsigned long *) &kvm->arch.model.subfuncs.ppno)[1]);
+ VM_EVENT(kvm, 3, "GET: guest KMA subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm->arch.model.subfuncs.kma)[0],
+ ((unsigned long *) &kvm->arch.model.subfuncs.kma)[1]);
+
+ return 0;
}
static int kvm_s390_get_machine_subfunc(struct kvm *kvm,
@@ -1395,8 +1501,55 @@ static int kvm_s390_get_machine_subfunc(struct kvm *kvm,
if (copy_to_user((void __user *)attr->addr, &kvm_s390_available_subfunc,
sizeof(struct kvm_s390_vm_cpu_subfunc)))
return -EFAULT;
+
+ VM_EVENT(kvm, 3, "GET: host PLO subfunc 0x%16.16lx.%16.16lx.%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm_s390_available_subfunc.plo)[0],
+ ((unsigned long *) &kvm_s390_available_subfunc.plo)[1],
+ ((unsigned long *) &kvm_s390_available_subfunc.plo)[2],
+ ((unsigned long *) &kvm_s390_available_subfunc.plo)[3]);
+ VM_EVENT(kvm, 3, "GET: host PTFF subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm_s390_available_subfunc.ptff)[0],
+ ((unsigned long *) &kvm_s390_available_subfunc.ptff)[1]);
+ VM_EVENT(kvm, 3, "GET: host KMAC subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm_s390_available_subfunc.kmac)[0],
+ ((unsigned long *) &kvm_s390_available_subfunc.kmac)[1]);
+ VM_EVENT(kvm, 3, "GET: host KMC subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm_s390_available_subfunc.kmc)[0],
+ ((unsigned long *) &kvm_s390_available_subfunc.kmc)[1]);
+ VM_EVENT(kvm, 3, "GET: host KM subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm_s390_available_subfunc.km)[0],
+ ((unsigned long *) &kvm_s390_available_subfunc.km)[1]);
+ VM_EVENT(kvm, 3, "GET: host KIMD subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm_s390_available_subfunc.kimd)[0],
+ ((unsigned long *) &kvm_s390_available_subfunc.kimd)[1]);
+ VM_EVENT(kvm, 3, "GET: host KLMD subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm_s390_available_subfunc.klmd)[0],
+ ((unsigned long *) &kvm_s390_available_subfunc.klmd)[1]);
+ VM_EVENT(kvm, 3, "GET: host PCKMO subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm_s390_available_subfunc.pckmo)[0],
+ ((unsigned long *) &kvm_s390_available_subfunc.pckmo)[1]);
+ VM_EVENT(kvm, 3, "GET: host KMCTR subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm_s390_available_subfunc.kmctr)[0],
+ ((unsigned long *) &kvm_s390_available_subfunc.kmctr)[1]);
+ VM_EVENT(kvm, 3, "GET: host KMF subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm_s390_available_subfunc.kmf)[0],
+ ((unsigned long *) &kvm_s390_available_subfunc.kmf)[1]);
+ VM_EVENT(kvm, 3, "GET: host KMO subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm_s390_available_subfunc.kmo)[0],
+ ((unsigned long *) &kvm_s390_available_subfunc.kmo)[1]);
+ VM_EVENT(kvm, 3, "GET: host PCC subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm_s390_available_subfunc.pcc)[0],
+ ((unsigned long *) &kvm_s390_available_subfunc.pcc)[1]);
+ VM_EVENT(kvm, 3, "GET: host PPNO subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm_s390_available_subfunc.ppno)[0],
+ ((unsigned long *) &kvm_s390_available_subfunc.ppno)[1]);
+ VM_EVENT(kvm, 3, "GET: host KMA subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm_s390_available_subfunc.kma)[0],
+ ((unsigned long *) &kvm_s390_available_subfunc.kma)[1]);
+
return 0;
}
+
static int kvm_s390_get_cpu_model(struct kvm *kvm, struct kvm_device_attr *attr)
{
int ret = -ENXIO;
@@ -1514,10 +1667,9 @@ static int kvm_s390_vm_has_attr(struct kvm *kvm, struct kvm_device_attr *attr)
case KVM_S390_VM_CPU_PROCESSOR_FEAT:
case KVM_S390_VM_CPU_MACHINE_FEAT:
case KVM_S390_VM_CPU_MACHINE_SUBFUNC:
+ case KVM_S390_VM_CPU_PROCESSOR_SUBFUNC:
ret = 0;
break;
- /* configuring subfunctions is not supported yet */
- case KVM_S390_VM_CPU_PROCESSOR_SUBFUNC:
default:
ret = -ENXIO;
break;
@@ -2209,6 +2361,7 @@ int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
if (!kvm->arch.sie_page2)
goto out_err;
+ kvm->arch.sie_page2->kvm = kvm;
kvm->arch.model.fac_list = kvm->arch.sie_page2->fac_list;
for (i = 0; i < kvm_s390_fac_size(); i++) {
@@ -2218,6 +2371,7 @@ int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
kvm->arch.model.fac_list[i] = S390_lowcore.stfle_fac_list[i] &
kvm_s390_fac_base[i];
}
+ kvm->arch.model.subfuncs = kvm_s390_available_subfunc;
/* we are always in czam mode - even on pre z14 machines */
set_kvm_facility(kvm->arch.model.fac_mask, 138);
@@ -2812,7 +2966,7 @@ struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm,
vcpu->arch.sie_block->icpua = id;
spin_lock_init(&vcpu->arch.local_int.lock);
- vcpu->arch.sie_block->gd = (u32)(u64)kvm->arch.gisa;
+ vcpu->arch.sie_block->gd = (u32)(u64)kvm->arch.gisa_int.origin;
if (vcpu->arch.sie_block->gd && sclp.has_gisaf)
vcpu->arch.sie_block->gd |= GISA_FORMAT1;
seqcount_init(&vcpu->arch.cputm_seqcount);
@@ -3458,6 +3612,8 @@ static int vcpu_pre_run(struct kvm_vcpu *vcpu)
kvm_s390_patch_guest_per_regs(vcpu);
}
+ clear_bit(vcpu->vcpu_id, vcpu->kvm->arch.gisa_int.kicked_mask);
+
vcpu->arch.sie_block->icptcode = 0;
cpuflags = atomic_read(&vcpu->arch.sie_block->cpuflags);
VCPU_EVENT(vcpu, 6, "entering sie flags %x", cpuflags);
@@ -4293,12 +4449,12 @@ static int __init kvm_s390_init(void)
int i;
if (!sclp.has_sief2) {
- pr_info("SIE not available\n");
+ pr_info("SIE is not available\n");
return -ENODEV;
}
if (nested && hpage) {
- pr_info("nested (vSIE) and hpage (huge page backing) can currently not be activated concurrently");
+ pr_info("A KVM host that supports nesting cannot back its KVM guests with huge pages\n");
return -EINVAL;
}
diff --git a/arch/s390/kvm/kvm-s390.h b/arch/s390/kvm/kvm-s390.h
index 1f6e36cdce0d..6d9448dbd052 100644
--- a/arch/s390/kvm/kvm-s390.h
+++ b/arch/s390/kvm/kvm-s390.h
@@ -67,7 +67,7 @@ static inline int is_vcpu_stopped(struct kvm_vcpu *vcpu)
static inline int is_vcpu_idle(struct kvm_vcpu *vcpu)
{
- return test_bit(vcpu->vcpu_id, vcpu->kvm->arch.float_int.idle_mask);
+ return test_bit(vcpu->vcpu_id, vcpu->kvm->arch.idle_mask);
}
static inline int kvm_is_ucontrol(struct kvm *kvm)
@@ -381,6 +381,8 @@ int kvm_s390_get_irq_state(struct kvm_vcpu *vcpu,
void kvm_s390_gisa_init(struct kvm *kvm);
void kvm_s390_gisa_clear(struct kvm *kvm);
void kvm_s390_gisa_destroy(struct kvm *kvm);
+int kvm_s390_gib_init(u8 nisc);
+void kvm_s390_gib_destroy(void);
/* implemented in guestdbg.c */
void kvm_s390_backup_guest_per_regs(struct kvm_vcpu *vcpu);