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Diffstat (limited to 'arch/s390/kvm/interrupt.c')
-rw-r--r--arch/s390/kvm/interrupt.c1101
1 files changed, 706 insertions, 395 deletions
diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c
index 073b5f387d1d..9de47265ef73 100644
--- a/arch/s390/kvm/interrupt.c
+++ b/arch/s390/kvm/interrupt.c
@@ -1,7 +1,7 @@
/*
* handling kvm guest interrupts
*
- * Copyright IBM Corp. 2008,2014
+ * Copyright IBM Corp. 2008, 2015
*
* 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)
@@ -17,9 +17,12 @@
#include <linux/signal.h>
#include <linux/slab.h>
#include <linux/bitmap.h>
+#include <linux/vmalloc.h>
#include <asm/asm-offsets.h>
+#include <asm/dis.h>
#include <asm/uaccess.h>
#include <asm/sclp.h>
+#include <asm/isc.h>
#include "kvm-s390.h"
#include "gaccess.h"
#include "trace-s390.h"
@@ -32,11 +35,6 @@
#define PFAULT_DONE 0x0680
#define VIRTIO_PARAM 0x0d00
-static int is_ioint(u64 type)
-{
- return ((type & 0xfffe0000u) != 0xfffe0000u);
-}
-
int psw_extint_disabled(struct kvm_vcpu *vcpu)
{
return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_EXT);
@@ -72,70 +70,45 @@ static int ckc_interrupts_enabled(struct kvm_vcpu *vcpu)
return 1;
}
-static u64 int_word_to_isc_bits(u32 int_word)
+static int ckc_irq_pending(struct kvm_vcpu *vcpu)
+{
+ if (!(vcpu->arch.sie_block->ckc <
+ get_tod_clock_fast() + vcpu->arch.sie_block->epoch))
+ return 0;
+ return ckc_interrupts_enabled(vcpu);
+}
+
+static int cpu_timer_interrupts_enabled(struct kvm_vcpu *vcpu)
+{
+ return !psw_extint_disabled(vcpu) &&
+ (vcpu->arch.sie_block->gcr[0] & 0x400ul);
+}
+
+static int cpu_timer_irq_pending(struct kvm_vcpu *vcpu)
+{
+ return (vcpu->arch.sie_block->cputm >> 63) &&
+ cpu_timer_interrupts_enabled(vcpu);
+}
+
+static inline int is_ioirq(unsigned long irq_type)
{
- u8 isc = (int_word & 0x38000000) >> 27;
+ return ((irq_type >= IRQ_PEND_IO_ISC_0) &&
+ (irq_type <= IRQ_PEND_IO_ISC_7));
+}
+static uint64_t isc_to_isc_bits(int isc)
+{
return (0x80 >> isc) << 24;
}
-static int __must_check __interrupt_is_deliverable(struct kvm_vcpu *vcpu,
- struct kvm_s390_interrupt_info *inti)
+static inline u8 int_word_to_isc(u32 int_word)
{
- switch (inti->type) {
- case KVM_S390_INT_EXTERNAL_CALL:
- if (psw_extint_disabled(vcpu))
- return 0;
- if (vcpu->arch.sie_block->gcr[0] & 0x2000ul)
- return 1;
- return 0;
- case KVM_S390_INT_EMERGENCY:
- if (psw_extint_disabled(vcpu))
- return 0;
- if (vcpu->arch.sie_block->gcr[0] & 0x4000ul)
- return 1;
- return 0;
- case KVM_S390_INT_CLOCK_COMP:
- return ckc_interrupts_enabled(vcpu);
- case KVM_S390_INT_CPU_TIMER:
- if (psw_extint_disabled(vcpu))
- return 0;
- if (vcpu->arch.sie_block->gcr[0] & 0x400ul)
- return 1;
- return 0;
- case KVM_S390_INT_SERVICE:
- case KVM_S390_INT_PFAULT_INIT:
- case KVM_S390_INT_PFAULT_DONE:
- case KVM_S390_INT_VIRTIO:
- if (psw_extint_disabled(vcpu))
- return 0;
- if (vcpu->arch.sie_block->gcr[0] & 0x200ul)
- return 1;
- return 0;
- case KVM_S390_PROGRAM_INT:
- case KVM_S390_SIGP_STOP:
- case KVM_S390_SIGP_SET_PREFIX:
- case KVM_S390_RESTART:
- return 1;
- case KVM_S390_MCHK:
- if (psw_mchk_disabled(vcpu))
- return 0;
- if (vcpu->arch.sie_block->gcr[14] & inti->mchk.cr14)
- return 1;
- return 0;
- case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
- if (psw_ioint_disabled(vcpu))
- return 0;
- if (vcpu->arch.sie_block->gcr[6] &
- int_word_to_isc_bits(inti->io.io_int_word))
- return 1;
- return 0;
- default:
- printk(KERN_WARNING "illegal interrupt type %llx\n",
- inti->type);
- BUG();
- }
- return 0;
+ return (int_word & 0x38000000) >> 27;
+}
+
+static inline unsigned long pending_floating_irqs(struct kvm_vcpu *vcpu)
+{
+ return vcpu->kvm->arch.float_int.pending_irqs;
}
static inline unsigned long pending_local_irqs(struct kvm_vcpu *vcpu)
@@ -143,12 +116,31 @@ static inline unsigned long pending_local_irqs(struct kvm_vcpu *vcpu)
return vcpu->arch.local_int.pending_irqs;
}
-static unsigned long deliverable_local_irqs(struct kvm_vcpu *vcpu)
+static unsigned long disable_iscs(struct kvm_vcpu *vcpu,
+ unsigned long active_mask)
+{
+ int i;
+
+ for (i = 0; i <= MAX_ISC; i++)
+ if (!(vcpu->arch.sie_block->gcr[6] & isc_to_isc_bits(i)))
+ active_mask &= ~(1UL << (IRQ_PEND_IO_ISC_0 + i));
+
+ return active_mask;
+}
+
+static unsigned long deliverable_irqs(struct kvm_vcpu *vcpu)
{
- unsigned long active_mask = pending_local_irqs(vcpu);
+ unsigned long active_mask;
+
+ active_mask = pending_local_irqs(vcpu);
+ active_mask |= pending_floating_irqs(vcpu);
if (psw_extint_disabled(vcpu))
active_mask &= ~IRQ_PEND_EXT_MASK;
+ if (psw_ioint_disabled(vcpu))
+ active_mask &= ~IRQ_PEND_IO_MASK;
+ else
+ active_mask = disable_iscs(vcpu, active_mask);
if (!(vcpu->arch.sie_block->gcr[0] & 0x2000ul))
__clear_bit(IRQ_PEND_EXT_EXTERNAL, &active_mask);
if (!(vcpu->arch.sie_block->gcr[0] & 0x4000ul))
@@ -157,8 +149,13 @@ static unsigned long deliverable_local_irqs(struct kvm_vcpu *vcpu)
__clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &active_mask);
if (!(vcpu->arch.sie_block->gcr[0] & 0x400ul))
__clear_bit(IRQ_PEND_EXT_CPU_TIMER, &active_mask);
+ if (!(vcpu->arch.sie_block->gcr[0] & 0x200ul))
+ __clear_bit(IRQ_PEND_EXT_SERVICE, &active_mask);
if (psw_mchk_disabled(vcpu))
active_mask &= ~IRQ_PEND_MCHK_MASK;
+ if (!(vcpu->arch.sie_block->gcr[14] &
+ vcpu->kvm->arch.float_int.mchk.cr14))
+ __clear_bit(IRQ_PEND_MCHK_REP, &active_mask);
/*
* STOP irqs will never be actively delivered. They are triggered via
@@ -200,6 +197,16 @@ static void __set_cpuflag(struct kvm_vcpu *vcpu, u32 flag)
atomic_set_mask(flag, &vcpu->arch.sie_block->cpuflags);
}
+static void set_intercept_indicators_io(struct kvm_vcpu *vcpu)
+{
+ if (!(pending_floating_irqs(vcpu) & IRQ_PEND_IO_MASK))
+ return;
+ else if (psw_ioint_disabled(vcpu))
+ __set_cpuflag(vcpu, CPUSTAT_IO_INT);
+ else
+ vcpu->arch.sie_block->lctl |= LCTL_CR6;
+}
+
static void set_intercept_indicators_ext(struct kvm_vcpu *vcpu)
{
if (!(pending_local_irqs(vcpu) & IRQ_PEND_EXT_MASK))
@@ -226,47 +233,17 @@ static void set_intercept_indicators_stop(struct kvm_vcpu *vcpu)
__set_cpuflag(vcpu, CPUSTAT_STOP_INT);
}
-/* Set interception request for non-deliverable local interrupts */
-static void set_intercept_indicators_local(struct kvm_vcpu *vcpu)
+/* Set interception request for non-deliverable interrupts */
+static void set_intercept_indicators(struct kvm_vcpu *vcpu)
{
+ set_intercept_indicators_io(vcpu);
set_intercept_indicators_ext(vcpu);
set_intercept_indicators_mchk(vcpu);
set_intercept_indicators_stop(vcpu);
}
-static void __set_intercept_indicator(struct kvm_vcpu *vcpu,
- struct kvm_s390_interrupt_info *inti)
-{
- switch (inti->type) {
- case KVM_S390_INT_SERVICE:
- case KVM_S390_INT_PFAULT_DONE:
- case KVM_S390_INT_VIRTIO:
- if (psw_extint_disabled(vcpu))
- __set_cpuflag(vcpu, CPUSTAT_EXT_INT);
- else
- vcpu->arch.sie_block->lctl |= LCTL_CR0;
- break;
- case KVM_S390_MCHK:
- if (psw_mchk_disabled(vcpu))
- vcpu->arch.sie_block->ictl |= ICTL_LPSW;
- else
- vcpu->arch.sie_block->lctl |= LCTL_CR14;
- break;
- case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
- if (psw_ioint_disabled(vcpu))
- __set_cpuflag(vcpu, CPUSTAT_IO_INT);
- else
- vcpu->arch.sie_block->lctl |= LCTL_CR6;
- break;
- default:
- BUG();
- }
-}
-
static u16 get_ilc(struct kvm_vcpu *vcpu)
{
- const unsigned short table[] = { 2, 4, 4, 6 };
-
switch (vcpu->arch.sie_block->icptcode) {
case ICPT_INST:
case ICPT_INSTPROGI:
@@ -274,7 +251,7 @@ static u16 get_ilc(struct kvm_vcpu *vcpu)
case ICPT_PARTEXEC:
case ICPT_IOINST:
/* last instruction only stored for these icptcodes */
- return table[vcpu->arch.sie_block->ipa >> 14];
+ return insn_length(vcpu->arch.sie_block->ipa >> 8);
case ICPT_PROGI:
return vcpu->arch.sie_block->pgmilc;
default:
@@ -350,38 +327,72 @@ static int __must_check __deliver_pfault_init(struct kvm_vcpu *vcpu)
static int __must_check __deliver_machine_check(struct kvm_vcpu *vcpu)
{
+ struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
- struct kvm_s390_mchk_info mchk;
- int rc;
+ struct kvm_s390_mchk_info mchk = {};
+ unsigned long adtl_status_addr;
+ int deliver = 0;
+ int rc = 0;
+ spin_lock(&fi->lock);
spin_lock(&li->lock);
- mchk = li->irq.mchk;
+ if (test_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs) ||
+ test_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs)) {
+ /*
+ * If there was an exigent machine check pending, then any
+ * repressible machine checks that might have been pending
+ * are indicated along with it, so always clear bits for
+ * repressible and exigent interrupts
+ */
+ mchk = li->irq.mchk;
+ clear_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs);
+ clear_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs);
+ memset(&li->irq.mchk, 0, sizeof(mchk));
+ deliver = 1;
+ }
/*
- * If there was an exigent machine check pending, then any repressible
- * machine checks that might have been pending are indicated along
- * with it, so always clear both bits
+ * We indicate floating repressible conditions along with
+ * other pending conditions. Channel Report Pending and Channel
+ * Subsystem damage are the only two and and are indicated by
+ * bits in mcic and masked in cr14.
*/
- clear_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs);
- clear_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs);
- memset(&li->irq.mchk, 0, sizeof(mchk));
+ if (test_and_clear_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs)) {
+ mchk.mcic |= fi->mchk.mcic;
+ mchk.cr14 |= fi->mchk.cr14;
+ memset(&fi->mchk, 0, sizeof(mchk));
+ deliver = 1;
+ }
spin_unlock(&li->lock);
+ spin_unlock(&fi->lock);
- VCPU_EVENT(vcpu, 4, "interrupt: machine check mcic=%llx",
- mchk.mcic);
- trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_MCHK,
- mchk.cr14, mchk.mcic);
-
- rc = kvm_s390_vcpu_store_status(vcpu, KVM_S390_STORE_STATUS_PREFIXED);
- rc |= put_guest_lc(vcpu, mchk.mcic,
- (u64 __user *) __LC_MCCK_CODE);
- rc |= put_guest_lc(vcpu, mchk.failing_storage_address,
- (u64 __user *) __LC_MCCK_FAIL_STOR_ADDR);
- rc |= write_guest_lc(vcpu, __LC_PSW_SAVE_AREA,
- &mchk.fixed_logout, sizeof(mchk.fixed_logout));
- rc |= write_guest_lc(vcpu, __LC_MCK_OLD_PSW,
- &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
- rc |= read_guest_lc(vcpu, __LC_MCK_NEW_PSW,
- &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
+ if (deliver) {
+ VCPU_EVENT(vcpu, 4, "interrupt: machine check mcic=%llx",
+ mchk.mcic);
+ trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
+ KVM_S390_MCHK,
+ mchk.cr14, mchk.mcic);
+
+ rc = kvm_s390_vcpu_store_status(vcpu,
+ KVM_S390_STORE_STATUS_PREFIXED);
+ rc |= read_guest_lc(vcpu, __LC_VX_SAVE_AREA_ADDR,
+ &adtl_status_addr,
+ sizeof(unsigned long));
+ rc |= kvm_s390_vcpu_store_adtl_status(vcpu,
+ adtl_status_addr);
+ rc |= put_guest_lc(vcpu, mchk.mcic,
+ (u64 __user *) __LC_MCCK_CODE);
+ rc |= put_guest_lc(vcpu, mchk.failing_storage_address,
+ (u64 __user *) __LC_MCCK_FAIL_STOR_ADDR);
+ rc |= write_guest_lc(vcpu, __LC_PSW_SAVE_AREA,
+ &mchk.fixed_logout,
+ sizeof(mchk.fixed_logout));
+ rc |= write_guest_lc(vcpu, __LC_MCK_OLD_PSW,
+ &vcpu->arch.sie_block->gpsw,
+ sizeof(psw_t));
+ rc |= read_guest_lc(vcpu, __LC_MCK_NEW_PSW,
+ &vcpu->arch.sie_block->gpsw,
+ sizeof(psw_t));
+ }
return rc ? -EFAULT : 0;
}
@@ -484,7 +495,7 @@ static int __must_check __deliver_prog(struct kvm_vcpu *vcpu)
{
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
struct kvm_s390_pgm_info pgm_info;
- int rc = 0;
+ int rc = 0, nullifying = false;
u16 ilc = get_ilc(vcpu);
spin_lock(&li->lock);
@@ -509,6 +520,8 @@ static int __must_check __deliver_prog(struct kvm_vcpu *vcpu)
case PGM_LX_TRANSLATION:
case PGM_PRIMARY_AUTHORITY:
case PGM_SECONDARY_AUTHORITY:
+ nullifying = true;
+ /* fall through */
case PGM_SPACE_SWITCH:
rc = put_guest_lc(vcpu, pgm_info.trans_exc_code,
(u64 *)__LC_TRANS_EXC_CODE);
@@ -521,6 +534,7 @@ static int __must_check __deliver_prog(struct kvm_vcpu *vcpu)
case PGM_EXTENDED_AUTHORITY:
rc = put_guest_lc(vcpu, pgm_info.exc_access_id,
(u8 *)__LC_EXC_ACCESS_ID);
+ nullifying = true;
break;
case PGM_ASCE_TYPE:
case PGM_PAGE_TRANSLATION:
@@ -534,6 +548,7 @@ static int __must_check __deliver_prog(struct kvm_vcpu *vcpu)
(u8 *)__LC_EXC_ACCESS_ID);
rc |= put_guest_lc(vcpu, pgm_info.op_access_id,
(u8 *)__LC_OP_ACCESS_ID);
+ nullifying = true;
break;
case PGM_MONITOR:
rc = put_guest_lc(vcpu, pgm_info.mon_class_nr,
@@ -541,6 +556,7 @@ static int __must_check __deliver_prog(struct kvm_vcpu *vcpu)
rc |= put_guest_lc(vcpu, pgm_info.mon_code,
(u64 *)__LC_MON_CODE);
break;
+ case PGM_VECTOR_PROCESSING:
case PGM_DATA:
rc = put_guest_lc(vcpu, pgm_info.data_exc_code,
(u32 *)__LC_DATA_EXC_CODE);
@@ -551,6 +567,15 @@ static int __must_check __deliver_prog(struct kvm_vcpu *vcpu)
rc |= put_guest_lc(vcpu, pgm_info.exc_access_id,
(u8 *)__LC_EXC_ACCESS_ID);
break;
+ case PGM_STACK_FULL:
+ case PGM_STACK_EMPTY:
+ case PGM_STACK_SPECIFICATION:
+ case PGM_STACK_TYPE:
+ case PGM_STACK_OPERATION:
+ case PGM_TRACE_TABEL:
+ case PGM_CRYPTO_OPERATION:
+ nullifying = true;
+ break;
}
if (pgm_info.code & PGM_PER) {
@@ -564,7 +589,12 @@ static int __must_check __deliver_prog(struct kvm_vcpu *vcpu)
(u8 *) __LC_PER_ACCESS_ID);
}
+ if (nullifying && vcpu->arch.sie_block->icptcode == ICPT_INST)
+ kvm_s390_rewind_psw(vcpu, ilc);
+
rc |= put_guest_lc(vcpu, ilc, (u16 *) __LC_PGM_ILC);
+ rc |= put_guest_lc(vcpu, vcpu->arch.sie_block->gbea,
+ (u64 *) __LC_LAST_BREAK);
rc |= put_guest_lc(vcpu, pgm_info.code,
(u16 *)__LC_PGM_INT_CODE);
rc |= write_guest_lc(vcpu, __LC_PGM_OLD_PSW,
@@ -574,16 +604,27 @@ static int __must_check __deliver_prog(struct kvm_vcpu *vcpu)
return rc ? -EFAULT : 0;
}
-static int __must_check __deliver_service(struct kvm_vcpu *vcpu,
- struct kvm_s390_interrupt_info *inti)
+static int __must_check __deliver_service(struct kvm_vcpu *vcpu)
{
- int rc;
+ struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
+ struct kvm_s390_ext_info ext;
+ int rc = 0;
+
+ spin_lock(&fi->lock);
+ if (!(test_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs))) {
+ spin_unlock(&fi->lock);
+ return 0;
+ }
+ ext = fi->srv_signal;
+ memset(&fi->srv_signal, 0, sizeof(ext));
+ clear_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs);
+ spin_unlock(&fi->lock);
VCPU_EVENT(vcpu, 4, "interrupt: sclp parm:%x",
- inti->ext.ext_params);
+ ext.ext_params);
vcpu->stat.deliver_service_signal++;
- trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
- inti->ext.ext_params, 0);
+ trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_SERVICE,
+ ext.ext_params, 0);
rc = put_guest_lc(vcpu, EXT_IRQ_SERVICE_SIG, (u16 *)__LC_EXT_INT_CODE);
rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR);
@@ -591,106 +632,146 @@ static int __must_check __deliver_service(struct kvm_vcpu *vcpu,
&vcpu->arch.sie_block->gpsw, sizeof(psw_t));
rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
&vcpu->arch.sie_block->gpsw, sizeof(psw_t));
- rc |= put_guest_lc(vcpu, inti->ext.ext_params,
+ rc |= put_guest_lc(vcpu, ext.ext_params,
(u32 *)__LC_EXT_PARAMS);
+
return rc ? -EFAULT : 0;
}
-static int __must_check __deliver_pfault_done(struct kvm_vcpu *vcpu,
- struct kvm_s390_interrupt_info *inti)
+static int __must_check __deliver_pfault_done(struct kvm_vcpu *vcpu)
{
- int rc;
+ struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
+ struct kvm_s390_interrupt_info *inti;
+ int rc = 0;
- trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
- KVM_S390_INT_PFAULT_DONE, 0,
- inti->ext.ext_params2);
+ spin_lock(&fi->lock);
+ inti = list_first_entry_or_null(&fi->lists[FIRQ_LIST_PFAULT],
+ struct kvm_s390_interrupt_info,
+ list);
+ if (inti) {
+ trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
+ KVM_S390_INT_PFAULT_DONE, 0,
+ inti->ext.ext_params2);
+ list_del(&inti->list);
+ fi->counters[FIRQ_CNTR_PFAULT] -= 1;
+ }
+ if (list_empty(&fi->lists[FIRQ_LIST_PFAULT]))
+ clear_bit(IRQ_PEND_PFAULT_DONE, &fi->pending_irqs);
+ spin_unlock(&fi->lock);
- rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE, (u16 *)__LC_EXT_INT_CODE);
- rc |= put_guest_lc(vcpu, PFAULT_DONE, (u16 *)__LC_EXT_CPU_ADDR);
- rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
- &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
- rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
- &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
- rc |= put_guest_lc(vcpu, inti->ext.ext_params2,
- (u64 *)__LC_EXT_PARAMS2);
+ if (inti) {
+ rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE,
+ (u16 *)__LC_EXT_INT_CODE);
+ rc |= put_guest_lc(vcpu, PFAULT_DONE,
+ (u16 *)__LC_EXT_CPU_ADDR);
+ rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
+ &vcpu->arch.sie_block->gpsw,
+ sizeof(psw_t));
+ rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
+ &vcpu->arch.sie_block->gpsw,
+ sizeof(psw_t));
+ rc |= put_guest_lc(vcpu, inti->ext.ext_params2,
+ (u64 *)__LC_EXT_PARAMS2);
+ kfree(inti);
+ }
return rc ? -EFAULT : 0;
}
-static int __must_check __deliver_virtio(struct kvm_vcpu *vcpu,
- struct kvm_s390_interrupt_info *inti)
+static int __must_check __deliver_virtio(struct kvm_vcpu *vcpu)
{
- int rc;
+ struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
+ struct kvm_s390_interrupt_info *inti;
+ int rc = 0;
- VCPU_EVENT(vcpu, 4, "interrupt: virtio parm:%x,parm64:%llx",
- inti->ext.ext_params, inti->ext.ext_params2);
- vcpu->stat.deliver_virtio_interrupt++;
- trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
- inti->ext.ext_params,
- inti->ext.ext_params2);
+ spin_lock(&fi->lock);
+ inti = list_first_entry_or_null(&fi->lists[FIRQ_LIST_VIRTIO],
+ struct kvm_s390_interrupt_info,
+ list);
+ if (inti) {
+ VCPU_EVENT(vcpu, 4,
+ "interrupt: virtio parm:%x,parm64:%llx",
+ inti->ext.ext_params, inti->ext.ext_params2);
+ vcpu->stat.deliver_virtio_interrupt++;
+ trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
+ inti->type,
+ inti->ext.ext_params,
+ inti->ext.ext_params2);
+ list_del(&inti->list);
+ fi->counters[FIRQ_CNTR_VIRTIO] -= 1;
+ }
+ if (list_empty(&fi->lists[FIRQ_LIST_VIRTIO]))
+ clear_bit(IRQ_PEND_VIRTIO, &fi->pending_irqs);
+ spin_unlock(&fi->lock);
- rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE, (u16 *)__LC_EXT_INT_CODE);
- rc |= put_guest_lc(vcpu, VIRTIO_PARAM, (u16 *)__LC_EXT_CPU_ADDR);
- rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
- &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
- rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
- &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
- rc |= put_guest_lc(vcpu, inti->ext.ext_params,
- (u32 *)__LC_EXT_PARAMS);
- rc |= put_guest_lc(vcpu, inti->ext.ext_params2,
- (u64 *)__LC_EXT_PARAMS2);
+ if (inti) {
+ rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE,
+ (u16 *)__LC_EXT_INT_CODE);
+ rc |= put_guest_lc(vcpu, VIRTIO_PARAM,
+ (u16 *)__LC_EXT_CPU_ADDR);
+ rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
+ &vcpu->arch.sie_block->gpsw,
+ sizeof(psw_t));
+ rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
+ &vcpu->arch.sie_block->gpsw,
+ sizeof(psw_t));
+ rc |= put_guest_lc(vcpu, inti->ext.ext_params,
+ (u32 *)__LC_EXT_PARAMS);
+ rc |= put_guest_lc(vcpu, inti->ext.ext_params2,
+ (u64 *)__LC_EXT_PARAMS2);
+ kfree(inti);
+ }
return rc ? -EFAULT : 0;
}
static int __must_check __deliver_io(struct kvm_vcpu *vcpu,
- struct kvm_s390_interrupt_info *inti)
+ unsigned long irq_type)
{
- int rc;
+ struct list_head *isc_list;
+ struct kvm_s390_float_interrupt *fi;
+ struct kvm_s390_interrupt_info *inti = NULL;
+ int rc = 0;
- VCPU_EVENT(vcpu, 4, "interrupt: I/O %llx", inti->type);
- vcpu->stat.deliver_io_int++;
- trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
- ((__u32)inti->io.subchannel_id << 16) |
- inti->io.subchannel_nr,
- ((__u64)inti->io.io_int_parm << 32) |
- inti->io.io_int_word);
-
- rc = put_guest_lc(vcpu, inti->io.subchannel_id,
- (u16 *)__LC_SUBCHANNEL_ID);
- rc |= put_guest_lc(vcpu, inti->io.subchannel_nr,
- (u16 *)__LC_SUBCHANNEL_NR);
- rc |= put_guest_lc(vcpu, inti->io.io_int_parm,
- (u32 *)__LC_IO_INT_PARM);
- rc |= put_guest_lc(vcpu, inti->io.io_int_word,
- (u32 *)__LC_IO_INT_WORD);
- rc |= write_guest_lc(vcpu, __LC_IO_OLD_PSW,
- &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
- rc |= read_guest_lc(vcpu, __LC_IO_NEW_PSW,
- &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
- return rc ? -EFAULT : 0;
-}
+ fi = &vcpu->kvm->arch.float_int;
-static int __must_check __deliver_mchk_floating(struct kvm_vcpu *vcpu,
- struct kvm_s390_interrupt_info *inti)
-{
- struct kvm_s390_mchk_info *mchk = &inti->mchk;
- int rc;
+ spin_lock(&fi->lock);
+ isc_list = &fi->lists[irq_type - IRQ_PEND_IO_ISC_0];
+ inti = list_first_entry_or_null(isc_list,
+ struct kvm_s390_interrupt_info,
+ list);
+ if (inti) {
+ VCPU_EVENT(vcpu, 4, "interrupt: I/O %llx", inti->type);
+ vcpu->stat.deliver_io_int++;
+ trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
+ inti->type,
+ ((__u32)inti->io.subchannel_id << 16) |
+ inti->io.subchannel_nr,
+ ((__u64)inti->io.io_int_parm << 32) |
+ inti->io.io_int_word);
+ list_del(&inti->list);
+ fi->counters[FIRQ_CNTR_IO] -= 1;
+ }
+ if (list_empty(isc_list))
+ clear_bit(irq_type, &fi->pending_irqs);
+ spin_unlock(&fi->lock);
+
+ if (inti) {
+ rc = put_guest_lc(vcpu, inti->io.subchannel_id,
+ (u16 *)__LC_SUBCHANNEL_ID);
+ rc |= put_guest_lc(vcpu, inti->io.subchannel_nr,
+ (u16 *)__LC_SUBCHANNEL_NR);
+ rc |= put_guest_lc(vcpu, inti->io.io_int_parm,
+ (u32 *)__LC_IO_INT_PARM);
+ rc |= put_guest_lc(vcpu, inti->io.io_int_word,
+ (u32 *)__LC_IO_INT_WORD);
+ rc |= write_guest_lc(vcpu, __LC_IO_OLD_PSW,
+ &vcpu->arch.sie_block->gpsw,
+ sizeof(psw_t));
+ rc |= read_guest_lc(vcpu, __LC_IO_NEW_PSW,
+ &vcpu->arch.sie_block->gpsw,
+ sizeof(psw_t));
+ kfree(inti);
+ }
- VCPU_EVENT(vcpu, 4, "interrupt: machine check mcic=%llx",
- mchk->mcic);
- trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_MCHK,
- mchk->cr14, mchk->mcic);
-
- rc = kvm_s390_vcpu_store_status(vcpu, KVM_S390_STORE_STATUS_PREFIXED);
- rc |= put_guest_lc(vcpu, mchk->mcic,
- (u64 __user *) __LC_MCCK_CODE);
- rc |= put_guest_lc(vcpu, mchk->failing_storage_address,
- (u64 __user *) __LC_MCCK_FAIL_STOR_ADDR);
- rc |= write_guest_lc(vcpu, __LC_PSW_SAVE_AREA,
- &mchk->fixed_logout, sizeof(mchk->fixed_logout));
- rc |= write_guest_lc(vcpu, __LC_MCK_OLD_PSW,
- &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
- rc |= read_guest_lc(vcpu, __LC_MCK_NEW_PSW,
- &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
return rc ? -EFAULT : 0;
}
@@ -698,6 +779,7 @@ 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,
@@ -706,36 +788,11 @@ static const deliver_irq_t deliver_irq_funcs[] = {
[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,
};
-static int __must_check __deliver_floating_interrupt(struct kvm_vcpu *vcpu,
- struct kvm_s390_interrupt_info *inti)
-{
- int rc;
-
- switch (inti->type) {
- case KVM_S390_INT_SERVICE:
- rc = __deliver_service(vcpu, inti);
- break;
- case KVM_S390_INT_PFAULT_DONE:
- rc = __deliver_pfault_done(vcpu, inti);
- break;
- case KVM_S390_INT_VIRTIO:
- rc = __deliver_virtio(vcpu, inti);
- break;
- case KVM_S390_MCHK:
- rc = __deliver_mchk_floating(vcpu, inti);
- break;
- case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
- rc = __deliver_io(vcpu, inti);
- break;
- default:
- BUG();
- }
-
- return rc;
-}
-
/* Check whether an external call is pending (deliverable or not) */
int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu)
{
@@ -751,21 +808,9 @@ int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu)
int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop)
{
- struct kvm_s390_float_interrupt *fi = vcpu->arch.local_int.float_int;
- struct kvm_s390_interrupt_info *inti;
int rc;
- rc = !!deliverable_local_irqs(vcpu);
-
- if ((!rc) && atomic_read(&fi->active)) {
- spin_lock(&fi->lock);
- list_for_each_entry(inti, &fi->list, list)
- if (__interrupt_is_deliverable(vcpu, inti)) {
- rc = 1;
- break;
- }
- spin_unlock(&fi->lock);
- }
+ rc = !!deliverable_irqs(vcpu);
if (!rc && kvm_cpu_has_pending_timer(vcpu))
rc = 1;
@@ -784,12 +829,7 @@ int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop)
int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
{
- if (!(vcpu->arch.sie_block->ckc <
- get_tod_clock_fast() + vcpu->arch.sie_block->epoch))
- return 0;
- if (!ckc_interrupts_enabled(vcpu))
- return 0;
- return 1;
+ return ckc_irq_pending(vcpu) || cpu_timer_irq_pending(vcpu);
}
int kvm_s390_handle_wait(struct kvm_vcpu *vcpu)
@@ -884,60 +924,45 @@ 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;
- struct kvm_s390_float_interrupt *fi = vcpu->arch.local_int.float_int;
- struct kvm_s390_interrupt_info *n, *inti = NULL;
deliver_irq_t func;
- int deliver;
int rc = 0;
unsigned long irq_type;
- unsigned long deliverable_irqs;
+ unsigned long irqs;
__reset_intercept_indicators(vcpu);
/* pending ckc conditions might have been invalidated */
clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
- if (kvm_cpu_has_pending_timer(vcpu))
+ if (ckc_irq_pending(vcpu))
set_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
+ /* pending cpu timer conditions might have been invalidated */
+ clear_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
+ if (cpu_timer_irq_pending(vcpu))
+ set_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
+
do {
- deliverable_irqs = deliverable_local_irqs(vcpu);
+ irqs = deliverable_irqs(vcpu);
/* bits are in the order of interrupt priority */
- irq_type = find_first_bit(&deliverable_irqs, IRQ_PEND_COUNT);
+ irq_type = find_first_bit(&irqs, IRQ_PEND_COUNT);
if (irq_type == IRQ_PEND_COUNT)
break;
- func = deliver_irq_funcs[irq_type];
- if (!func) {
- WARN_ON_ONCE(func == NULL);
- clear_bit(irq_type, &li->pending_irqs);
- continue;
+ if (is_ioirq(irq_type)) {
+ 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);
}
- rc = func(vcpu);
- } while (!rc && irq_type != IRQ_PEND_COUNT);
+ if (rc)
+ break;
+ } while (!rc);
- set_intercept_indicators_local(vcpu);
-
- if (!rc && atomic_read(&fi->active)) {
- do {
- deliver = 0;
- spin_lock(&fi->lock);
- list_for_each_entry_safe(inti, n, &fi->list, list) {
- if (__interrupt_is_deliverable(vcpu, inti)) {
- list_del(&inti->list);
- fi->irq_count--;
- deliver = 1;
- break;
- }
- __set_intercept_indicator(vcpu, inti);
- }
- if (list_empty(&fi->list))
- atomic_set(&fi->active, 0);
- spin_unlock(&fi->lock);
- if (deliver) {
- rc = __deliver_floating_interrupt(vcpu, inti);
- kfree(inti);
- }
- } while (!rc && deliver);
- }
+ set_intercept_indicators(vcpu);
return rc;
}
@@ -1172,80 +1197,182 @@ static int __inject_cpu_timer(struct kvm_vcpu *vcpu)
return 0;
}
+static struct kvm_s390_interrupt_info *get_io_int(struct kvm *kvm,
+ int isc, u32 schid)
+{
+ struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
+ struct list_head *isc_list = &fi->lists[FIRQ_LIST_IO_ISC_0 + isc];
+ struct kvm_s390_interrupt_info *iter;
+ u16 id = (schid & 0xffff0000U) >> 16;
+ u16 nr = schid & 0x0000ffffU;
+ spin_lock(&fi->lock);
+ list_for_each_entry(iter, isc_list, list) {
+ if (schid && (id != iter->io.subchannel_id ||
+ nr != iter->io.subchannel_nr))
+ continue;
+ /* found an appropriate entry */
+ list_del_init(&iter->list);
+ fi->counters[FIRQ_CNTR_IO] -= 1;
+ if (list_empty(isc_list))
+ clear_bit(IRQ_PEND_IO_ISC_0 + isc, &fi->pending_irqs);
+ spin_unlock(&fi->lock);
+ return iter;
+ }
+ spin_unlock(&fi->lock);
+ return NULL;
+}
+
+/*
+ * Dequeue and return an I/O interrupt matching any of the interruption
+ * subclasses as designated by the isc mask in cr6 and the schid (if != 0).
+ */
struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm,
- u64 cr6, u64 schid)
+ u64 isc_mask, u32 schid)
+{
+ struct kvm_s390_interrupt_info *inti = NULL;
+ int isc;
+
+ for (isc = 0; isc <= MAX_ISC && !inti; isc++) {
+ if (isc_mask & isc_to_isc_bits(isc))
+ inti = get_io_int(kvm, isc, schid);
+ }
+ return inti;
+}
+
+#define SCCB_MASK 0xFFFFFFF8
+#define SCCB_EVENT_PENDING 0x3
+
+static int __inject_service(struct kvm *kvm,
+ struct kvm_s390_interrupt_info *inti)
+{
+ struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
+
+ spin_lock(&fi->lock);
+ fi->srv_signal.ext_params |= inti->ext.ext_params & SCCB_EVENT_PENDING;
+ /*
+ * Early versions of the QEMU s390 bios will inject several
+ * service interrupts after another without handling a
+ * condition code indicating busy.
+ * We will silently ignore those superfluous sccb values.
+ * A future version of QEMU will take care of serialization
+ * of servc requests
+ */
+ if (fi->srv_signal.ext_params & SCCB_MASK)
+ goto out;
+ fi->srv_signal.ext_params |= inti->ext.ext_params & SCCB_MASK;
+ set_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs);
+out:
+ spin_unlock(&fi->lock);
+ kfree(inti);
+ return 0;
+}
+
+static int __inject_virtio(struct kvm *kvm,
+ struct kvm_s390_interrupt_info *inti)
+{
+ struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
+
+ spin_lock(&fi->lock);
+ if (fi->counters[FIRQ_CNTR_VIRTIO] >= KVM_S390_MAX_VIRTIO_IRQS) {
+ spin_unlock(&fi->lock);
+ return -EBUSY;
+ }
+ fi->counters[FIRQ_CNTR_VIRTIO] += 1;
+ list_add_tail(&inti->list, &fi->lists[FIRQ_LIST_VIRTIO]);
+ set_bit(IRQ_PEND_VIRTIO, &fi->pending_irqs);
+ spin_unlock(&fi->lock);
+ return 0;
+}
+
+static int __inject_pfault_done(struct kvm *kvm,
+ struct kvm_s390_interrupt_info *inti)
+{
+ struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
+
+ spin_lock(&fi->lock);
+ if (fi->counters[FIRQ_CNTR_PFAULT] >=
+ (ASYNC_PF_PER_VCPU * KVM_MAX_VCPUS)) {
+ spin_unlock(&fi->lock);
+ return -EBUSY;
+ }
+ fi->counters[FIRQ_CNTR_PFAULT] += 1;
+ list_add_tail(&inti->list, &fi->lists[FIRQ_LIST_PFAULT]);
+ set_bit(IRQ_PEND_PFAULT_DONE, &fi->pending_irqs);
+ spin_unlock(&fi->lock);
+ return 0;
+}
+
+#define CR_PENDING_SUBCLASS 28
+static int __inject_float_mchk(struct kvm *kvm,
+ struct kvm_s390_interrupt_info *inti)
+{
+ struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
+
+ spin_lock(&fi->lock);
+ fi->mchk.cr14 |= inti->mchk.cr14 & (1UL << CR_PENDING_SUBCLASS);
+ fi->mchk.mcic |= inti->mchk.mcic;
+ set_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs);
+ spin_unlock(&fi->lock);
+ kfree(inti);
+ return 0;
+}
+
+static int __inject_io(struct kvm *kvm, struct kvm_s390_interrupt_info *inti)
{
struct kvm_s390_float_interrupt *fi;
- struct kvm_s390_interrupt_info *inti, *iter;
+ struct list_head *list;
+ int isc;
- if ((!schid && !cr6) || (schid && cr6))
- return NULL;
fi = &kvm->arch.float_int;
spin_lock(&fi->lock);
- inti = NULL;
- list_for_each_entry(iter, &fi->list, list) {
- if (!is_ioint(iter->type))
- continue;
- if (cr6 &&
- ((cr6 & int_word_to_isc_bits(iter->io.io_int_word)) == 0))
- continue;
- if (schid) {
- if (((schid & 0x00000000ffff0000) >> 16) !=
- iter->io.subchannel_id)
- continue;
- if ((schid & 0x000000000000ffff) !=
- iter->io.subchannel_nr)
- continue;
- }
- inti = iter;
- break;
- }
- if (inti) {
- list_del_init(&inti->list);
- fi->irq_count--;
+ if (fi->counters[FIRQ_CNTR_IO] >= KVM_S390_MAX_FLOAT_IRQS) {
+ spin_unlock(&fi->lock);
+ return -EBUSY;
}
- if (list_empty(&fi->list))
- atomic_set(&fi->active, 0);
+ fi->counters[FIRQ_CNTR_IO] += 1;
+
+ isc = int_word_to_isc(inti->io.io_int_word);
+ list = &fi->lists[FIRQ_LIST_IO_ISC_0 + isc];
+ list_add_tail(&inti->list, list);
+ set_bit(IRQ_PEND_IO_ISC_0 + isc, &fi->pending_irqs);
spin_unlock(&fi->lock);
- return inti;
+ return 0;
}
static int __inject_vm(struct kvm *kvm, struct kvm_s390_interrupt_info *inti)
{
struct kvm_s390_local_interrupt *li;
struct kvm_s390_float_interrupt *fi;
- struct kvm_s390_interrupt_info *iter;
struct kvm_vcpu *dst_vcpu = NULL;
int sigcpu;
- int rc = 0;
+ u64 type = READ_ONCE(inti->type);
+ int rc;
fi = &kvm->arch.float_int;
- spin_lock(&fi->lock);
- if (fi->irq_count >= KVM_S390_MAX_FLOAT_IRQS) {
+
+ switch (type) {
+ case KVM_S390_MCHK:
+ rc = __inject_float_mchk(kvm, inti);
+ break;
+ case KVM_S390_INT_VIRTIO:
+ rc = __inject_virtio(kvm, inti);
+ break;
+ case KVM_S390_INT_SERVICE:
+ rc = __inject_service(kvm, inti);
+ break;
+ case KVM_S390_INT_PFAULT_DONE:
+ rc = __inject_pfault_done(kvm, inti);
+ break;
+ case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
+ rc = __inject_io(kvm, inti);
+ break;
+ default:
rc = -EINVAL;
- goto unlock_fi;
}
- fi->irq_count++;
- if (!is_ioint(inti->type)) {
- list_add_tail(&inti->list, &fi->list);
- } else {
- u64 isc_bits = int_word_to_isc_bits(inti->io.io_int_word);
+ if (rc)
+ return rc;
- /* Keep I/O interrupts sorted in isc order. */
- list_for_each_entry(iter, &fi->list, list) {
- if (!is_ioint(iter->type))
- continue;
- if (int_word_to_isc_bits(iter->io.io_int_word)
- <= isc_bits)
- continue;
- break;
- }
- list_add_tail(&inti->list, &iter->list);
- }
- atomic_set(&fi->active, 1);
- if (atomic_read(&kvm->online_vcpus) == 0)
- goto unlock_fi;
sigcpu = find_first_bit(fi->idle_mask, KVM_MAX_VCPUS);
if (sigcpu == KVM_MAX_VCPUS) {
do {
@@ -1257,7 +1384,7 @@ static int __inject_vm(struct kvm *kvm, struct kvm_s390_interrupt_info *inti)
dst_vcpu = kvm_get_vcpu(kvm, sigcpu);
li = &dst_vcpu->arch.local_int;
spin_lock(&li->lock);
- switch (inti->type) {
+ switch (type) {
case KVM_S390_MCHK:
atomic_set_mask(CPUSTAT_STOP_INT, li->cpuflags);
break;
@@ -1270,9 +1397,8 @@ static int __inject_vm(struct kvm *kvm, struct kvm_s390_interrupt_info *inti)
}
spin_unlock(&li->lock);
kvm_s390_vcpu_wakeup(kvm_get_vcpu(kvm, sigcpu));
-unlock_fi:
- spin_unlock(&fi->lock);
- return rc;
+ return 0;
+
}
int kvm_s390_inject_vm(struct kvm *kvm,
@@ -1332,10 +1458,10 @@ int kvm_s390_inject_vm(struct kvm *kvm,
return rc;
}
-void kvm_s390_reinject_io_int(struct kvm *kvm,
+int kvm_s390_reinject_io_int(struct kvm *kvm,
struct kvm_s390_interrupt_info *inti)
{
- __inject_vm(kvm, inti);
+ return __inject_vm(kvm, inti);
}
int s390int_to_s390irq(struct kvm_s390_interrupt *s390int,
@@ -1388,12 +1514,10 @@ void kvm_s390_clear_stop_irq(struct kvm_vcpu *vcpu)
spin_unlock(&li->lock);
}
-int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
+static int do_inject_vcpu(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
{
- struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
int rc;
- spin_lock(&li->lock);
switch (irq->type) {
case KVM_S390_PROGRAM_INT:
VCPU_EVENT(vcpu, 3, "inject: program check %d (from user)",
@@ -1433,83 +1557,130 @@ int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
default:
rc = -EINVAL;
}
+
+ return rc;
+}
+
+int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
+{
+ struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
+ int rc;
+
+ spin_lock(&li->lock);
+ rc = do_inject_vcpu(vcpu, irq);
spin_unlock(&li->lock);
if (!rc)
kvm_s390_vcpu_wakeup(vcpu);
return rc;
}
-void kvm_s390_clear_float_irqs(struct kvm *kvm)
+static inline void clear_irq_list(struct list_head *_list)
{
- struct kvm_s390_float_interrupt *fi;
- struct kvm_s390_interrupt_info *n, *inti = NULL;
+ struct kvm_s390_interrupt_info *inti, *n;
- fi = &kvm->arch.float_int;
- spin_lock(&fi->lock);
- list_for_each_entry_safe(inti, n, &fi->list, list) {
+ list_for_each_entry_safe(inti, n, _list, list) {
list_del(&inti->list);
kfree(inti);
}
- fi->irq_count = 0;
- atomic_set(&fi->active, 0);
- spin_unlock(&fi->lock);
}
-static inline int copy_irq_to_user(struct kvm_s390_interrupt_info *inti,
- u8 *addr)
+static void inti_to_irq(struct kvm_s390_interrupt_info *inti,
+ struct kvm_s390_irq *irq)
{
- struct kvm_s390_irq __user *uptr = (struct kvm_s390_irq __user *) addr;
- struct kvm_s390_irq irq = {0};
-
- irq.type = inti->type;
+ irq->type = inti->type;
switch (inti->type) {
case KVM_S390_INT_PFAULT_INIT:
case KVM_S390_INT_PFAULT_DONE:
case KVM_S390_INT_VIRTIO:
- case KVM_S390_INT_SERVICE:
- irq.u.ext = inti->ext;
+ irq->u.ext = inti->ext;
break;
case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
- irq.u.io = inti->io;
+ irq->u.io = inti->io;
break;
- case KVM_S390_MCHK:
- irq.u.mchk = inti->mchk;
- break;
- default:
- return -EINVAL;
}
+}
- if (copy_to_user(uptr, &irq, sizeof(irq)))
- return -EFAULT;
+void kvm_s390_clear_float_irqs(struct kvm *kvm)
+{
+ struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
+ int i;
- return 0;
-}
+ spin_lock(&fi->lock);
+ for (i = 0; i < FIRQ_LIST_COUNT; i++)
+ clear_irq_list(&fi->lists[i]);
+ for (i = 0; i < FIRQ_MAX_COUNT; i++)
+ fi->counters[i] = 0;
+ spin_unlock(&fi->lock);
+};
-static int get_all_floating_irqs(struct kvm *kvm, __u8 *buf, __u64 len)
+static int get_all_floating_irqs(struct kvm *kvm, u8 __user *usrbuf, u64 len)
{
struct kvm_s390_interrupt_info *inti;
struct kvm_s390_float_interrupt *fi;
+ struct kvm_s390_irq *buf;
+ struct kvm_s390_irq *irq;
+ int max_irqs;
int ret = 0;
int n = 0;
+ int i;
+
+ if (len > KVM_S390_FLIC_MAX_BUFFER || len == 0)
+ return -EINVAL;
+
+ /*
+ * We are already using -ENOMEM to signal
+ * userspace it may retry with a bigger buffer,
+ * so we need to use something else for this case
+ */
+ buf = vzalloc(len);
+ if (!buf)
+ return -ENOBUFS;
+
+ max_irqs = len / sizeof(struct kvm_s390_irq);
fi = &kvm->arch.float_int;
spin_lock(&fi->lock);
-
- list_for_each_entry(inti, &fi->list, list) {
- if (len < sizeof(struct kvm_s390_irq)) {
+ for (i = 0; i < FIRQ_LIST_COUNT; i++) {
+ list_for_each_entry(inti, &fi->lists[i], list) {
+ if (n == max_irqs) {
+ /* signal userspace to try again */
+ ret = -ENOMEM;
+ goto out;
+ }
+ inti_to_irq(inti, &buf[n]);
+ n++;
+ }
+ }
+ if (test_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs)) {
+ if (n == max_irqs) {
/* signal userspace to try again */
ret = -ENOMEM;
- break;
+ goto out;
}
- ret = copy_irq_to_user(inti, buf);
- if (ret)
- break;
- buf += sizeof(struct kvm_s390_irq);
- len -= sizeof(struct kvm_s390_irq);
+ irq = (struct kvm_s390_irq *) &buf[n];
+ irq->type = KVM_S390_INT_SERVICE;
+ irq->u.ext = fi->srv_signal;
n++;
}
+ if (test_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs)) {
+ if (n == max_irqs) {
+ /* signal userspace to try again */
+ ret = -ENOMEM;
+ goto out;
+ }
+ irq = (struct kvm_s390_irq *) &buf[n];
+ irq->type = KVM_S390_MCHK;
+ irq->u.mchk = fi->mchk;
+ n++;
+}
+out:
spin_unlock(&fi->lock);
+ if (!ret && n > 0) {
+ if (copy_to_user(usrbuf, buf, sizeof(struct kvm_s390_irq) * n))
+ ret = -EFAULT;
+ }
+ vfree(buf);
return ret < 0 ? ret : n;
}
@@ -1520,7 +1691,7 @@ static int flic_get_attr(struct kvm_device *dev, struct kvm_device_attr *attr)
switch (attr->group) {
case KVM_DEV_FLIC_GET_ALL_IRQS:
- r = get_all_floating_irqs(dev->kvm, (u8 *) attr->addr,
+ r = get_all_floating_irqs(dev->kvm, (u8 __user *) attr->addr,
attr->attr);
break;
default:
@@ -1952,3 +2123,143 @@ int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e, struct kvm *kvm,
{
return -EINVAL;
}
+
+int kvm_s390_set_irq_state(struct kvm_vcpu *vcpu, void __user *irqstate, int len)
+{
+ struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
+ struct kvm_s390_irq *buf;
+ int r = 0;
+ int n;
+
+ buf = vmalloc(len);
+ if (!buf)
+ return -ENOMEM;
+
+ if (copy_from_user((void *) buf, irqstate, len)) {
+ r = -EFAULT;
+ goto out_free;
+ }
+
+ /*
+ * Don't allow setting the interrupt state
+ * when there are already interrupts pending
+ */
+ spin_lock(&li->lock);
+ if (li->pending_irqs) {
+ r = -EBUSY;
+ goto out_unlock;
+ }
+
+ for (n = 0; n < len / sizeof(*buf); n++) {
+ r = do_inject_vcpu(vcpu, &buf[n]);
+ if (r)
+ break;
+ }
+
+out_unlock:
+ spin_unlock(&li->lock);
+out_free:
+ vfree(buf);
+
+ return r;
+}
+
+static void store_local_irq(struct kvm_s390_local_interrupt *li,
+ struct kvm_s390_irq *irq,
+ unsigned long irq_type)
+{
+ switch (irq_type) {
+ case IRQ_PEND_MCHK_EX:
+ case IRQ_PEND_MCHK_REP:
+ irq->type = KVM_S390_MCHK;
+ irq->u.mchk = li->irq.mchk;
+ break;
+ case IRQ_PEND_PROG:
+ irq->type = KVM_S390_PROGRAM_INT;
+ irq->u.pgm = li->irq.pgm;
+ break;
+ case IRQ_PEND_PFAULT_INIT:
+ irq->type = KVM_S390_INT_PFAULT_INIT;
+ irq->u.ext = li->irq.ext;
+ break;
+ case IRQ_PEND_EXT_EXTERNAL:
+ irq->type = KVM_S390_INT_EXTERNAL_CALL;
+ irq->u.extcall = li->irq.extcall;
+ break;
+ case IRQ_PEND_EXT_CLOCK_COMP:
+ irq->type = KVM_S390_INT_CLOCK_COMP;
+ break;
+ case IRQ_PEND_EXT_CPU_TIMER:
+ irq->type = KVM_S390_INT_CPU_TIMER;
+ break;
+ case IRQ_PEND_SIGP_STOP:
+ irq->type = KVM_S390_SIGP_STOP;
+ irq->u.stop = li->irq.stop;
+ break;
+ case IRQ_PEND_RESTART:
+ irq->type = KVM_S390_RESTART;
+ break;
+ case IRQ_PEND_SET_PREFIX:
+ irq->type = KVM_S390_SIGP_SET_PREFIX;
+ irq->u.prefix = li->irq.prefix;
+ break;
+ }
+}
+
+int kvm_s390_get_irq_state(struct kvm_vcpu *vcpu, __u8 __user *buf, int len)
+{
+ uint8_t sigp_ctrl = vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sigp_ctrl;
+ unsigned long sigp_emerg_pending[BITS_TO_LONGS(KVM_MAX_VCPUS)];
+ struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
+ unsigned long pending_irqs;
+ struct kvm_s390_irq irq;
+ unsigned long irq_type;
+ int cpuaddr;
+ int n = 0;
+
+ spin_lock(&li->lock);
+ pending_irqs = li->pending_irqs;
+ memcpy(&sigp_emerg_pending, &li->sigp_emerg_pending,
+ sizeof(sigp_emerg_pending));
+ spin_unlock(&li->lock);
+
+ for_each_set_bit(irq_type, &pending_irqs, IRQ_PEND_COUNT) {
+ memset(&irq, 0, sizeof(irq));
+ if (irq_type == IRQ_PEND_EXT_EMERGENCY)
+ continue;
+ if (n + sizeof(irq) > len)
+ return -ENOBUFS;
+ store_local_irq(&vcpu->arch.local_int, &irq, irq_type);
+ if (copy_to_user(&buf[n], &irq, sizeof(irq)))
+ return -EFAULT;
+ n += sizeof(irq);
+ }
+
+ if (test_bit(IRQ_PEND_EXT_EMERGENCY, &pending_irqs)) {
+ for_each_set_bit(cpuaddr, sigp_emerg_pending, KVM_MAX_VCPUS) {
+ memset(&irq, 0, sizeof(irq));
+ if (n + sizeof(irq) > len)
+ return -ENOBUFS;
+ irq.type = KVM_S390_INT_EMERGENCY;
+ irq.u.emerg.code = cpuaddr;
+ if (copy_to_user(&buf[n], &irq, sizeof(irq)))
+ return -EFAULT;
+ n += sizeof(irq);
+ }
+ }
+
+ if ((sigp_ctrl & SIGP_CTRL_C) &&
+ (atomic_read(&vcpu->arch.sie_block->cpuflags) &
+ CPUSTAT_ECALL_PEND)) {
+ if (n + sizeof(irq) > len)
+ return -ENOBUFS;
+ memset(&irq, 0, sizeof(irq));
+ irq.type = KVM_S390_INT_EXTERNAL_CALL;
+ irq.u.extcall.code = sigp_ctrl & SIGP_CTRL_SCN_MASK;
+ if (copy_to_user(&buf[n], &irq, sizeof(irq)))
+ return -EFAULT;
+ n += sizeof(irq);
+ }
+
+ return n;
+}
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-22 11:25:38 +0300