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-rw-r--r--arch/s390/include/asm/atomic.h41
-rw-r--r--arch/s390/include/asm/barrier.h4
-rw-r--r--arch/s390/include/asm/jump_label.h19
-rw-r--r--arch/s390/kernel/jump_label.c2
-rw-r--r--arch/s390/kernel/time.c4
-rw-r--r--arch/s390/kvm/interrupt.c30
-rw-r--r--arch/s390/kvm/kvm-s390.c32
-rw-r--r--arch/s390/lib/uaccess.c12
8 files changed, 83 insertions, 61 deletions
diff --git a/arch/s390/include/asm/atomic.h b/arch/s390/include/asm/atomic.h
index adbe3802e377..117fa5c921c1 100644
--- a/arch/s390/include/asm/atomic.h
+++ b/arch/s390/include/asm/atomic.h
@@ -27,6 +27,7 @@
#define __ATOMIC_OR "lao"
#define __ATOMIC_AND "lan"
#define __ATOMIC_ADD "laa"
+#define __ATOMIC_XOR "lax"
#define __ATOMIC_BARRIER "bcr 14,0\n"
#define __ATOMIC_LOOP(ptr, op_val, op_string, __barrier) \
@@ -49,6 +50,7 @@
#define __ATOMIC_OR "or"
#define __ATOMIC_AND "nr"
#define __ATOMIC_ADD "ar"
+#define __ATOMIC_XOR "xr"
#define __ATOMIC_BARRIER "\n"
#define __ATOMIC_LOOP(ptr, op_val, op_string, __barrier) \
@@ -118,15 +120,17 @@ static inline void atomic_add(int i, atomic_t *v)
#define atomic_dec_return(_v) atomic_sub_return(1, _v)
#define atomic_dec_and_test(_v) (atomic_sub_return(1, _v) == 0)
-static inline void atomic_clear_mask(unsigned int mask, atomic_t *v)
-{
- __ATOMIC_LOOP(v, ~mask, __ATOMIC_AND, __ATOMIC_NO_BARRIER);
+#define ATOMIC_OP(op, OP) \
+static inline void atomic_##op(int i, atomic_t *v) \
+{ \
+ __ATOMIC_LOOP(v, i, __ATOMIC_##OP, __ATOMIC_NO_BARRIER); \
}
-static inline void atomic_set_mask(unsigned int mask, atomic_t *v)
-{
- __ATOMIC_LOOP(v, mask, __ATOMIC_OR, __ATOMIC_NO_BARRIER);
-}
+ATOMIC_OP(and, AND)
+ATOMIC_OP(or, OR)
+ATOMIC_OP(xor, XOR)
+
+#undef ATOMIC_OP
#define atomic_xchg(v, new) (xchg(&((v)->counter), new))
@@ -167,6 +171,7 @@ static inline int __atomic_add_unless(atomic_t *v, int a, int u)
#define __ATOMIC64_OR "laog"
#define __ATOMIC64_AND "lang"
#define __ATOMIC64_ADD "laag"
+#define __ATOMIC64_XOR "laxg"
#define __ATOMIC64_BARRIER "bcr 14,0\n"
#define __ATOMIC64_LOOP(ptr, op_val, op_string, __barrier) \
@@ -189,6 +194,7 @@ static inline int __atomic_add_unless(atomic_t *v, int a, int u)
#define __ATOMIC64_OR "ogr"
#define __ATOMIC64_AND "ngr"
#define __ATOMIC64_ADD "agr"
+#define __ATOMIC64_XOR "xgr"
#define __ATOMIC64_BARRIER "\n"
#define __ATOMIC64_LOOP(ptr, op_val, op_string, __barrier) \
@@ -247,16 +253,6 @@ static inline void atomic64_add(long long i, atomic64_t *v)
__ATOMIC64_LOOP(v, i, __ATOMIC64_ADD, __ATOMIC64_NO_BARRIER);
}
-static inline void atomic64_clear_mask(unsigned long mask, atomic64_t *v)
-{
- __ATOMIC64_LOOP(v, ~mask, __ATOMIC64_AND, __ATOMIC64_NO_BARRIER);
-}
-
-static inline void atomic64_set_mask(unsigned long mask, atomic64_t *v)
-{
- __ATOMIC64_LOOP(v, mask, __ATOMIC64_OR, __ATOMIC64_NO_BARRIER);
-}
-
#define atomic64_xchg(v, new) (xchg(&((v)->counter), new))
static inline long long atomic64_cmpxchg(atomic64_t *v,
@@ -270,6 +266,17 @@ static inline long long atomic64_cmpxchg(atomic64_t *v,
return old;
}
+#define ATOMIC64_OP(op, OP) \
+static inline void atomic64_##op(long i, atomic64_t *v) \
+{ \
+ __ATOMIC64_LOOP(v, i, __ATOMIC64_##OP, __ATOMIC64_NO_BARRIER); \
+}
+
+ATOMIC64_OP(and, AND)
+ATOMIC64_OP(or, OR)
+ATOMIC64_OP(xor, XOR)
+
+#undef ATOMIC64_OP
#undef __ATOMIC64_LOOP
static inline int atomic64_add_unless(atomic64_t *v, long long i, long long u)
diff --git a/arch/s390/include/asm/barrier.h b/arch/s390/include/asm/barrier.h
index e6f8615a11eb..d48fe0162331 100644
--- a/arch/s390/include/asm/barrier.h
+++ b/arch/s390/include/asm/barrier.h
@@ -42,12 +42,12 @@
do { \
compiletime_assert_atomic_type(*p); \
barrier(); \
- ACCESS_ONCE(*p) = (v); \
+ WRITE_ONCE(*p, v); \
} while (0)
#define smp_load_acquire(p) \
({ \
- typeof(*p) ___p1 = ACCESS_ONCE(*p); \
+ typeof(*p) ___p1 = READ_ONCE(*p); \
compiletime_assert_atomic_type(*p); \
barrier(); \
___p1; \
diff --git a/arch/s390/include/asm/jump_label.h b/arch/s390/include/asm/jump_label.h
index 69972b7957ee..7f9fd5e3f1bf 100644
--- a/arch/s390/include/asm/jump_label.h
+++ b/arch/s390/include/asm/jump_label.h
@@ -12,14 +12,29 @@
* We use a brcl 0,2 instruction for jump labels at compile time so it
* can be easily distinguished from a hotpatch generated instruction.
*/
-static __always_inline bool arch_static_branch(struct static_key *key)
+static __always_inline bool arch_static_branch(struct static_key *key, bool branch)
{
asm_volatile_goto("0: brcl 0,"__stringify(JUMP_LABEL_NOP_OFFSET)"\n"
".pushsection __jump_table, \"aw\"\n"
".balign 8\n"
".quad 0b, %l[label], %0\n"
".popsection\n"
- : : "X" (key) : : label);
+ : : "X" (&((char *)key)[branch]) : : label);
+
+ return false;
+label:
+ return true;
+}
+
+static __always_inline bool arch_static_branch_jump(struct static_key *key, bool branch)
+{
+ asm_volatile_goto("0: brcl 15, %l[label]\n"
+ ".pushsection __jump_table, \"aw\"\n"
+ ".balign 8\n"
+ ".quad 0b, %l[label], %0\n"
+ ".popsection\n"
+ : : "X" (&((char *)key)[branch]) : : label);
+
return false;
label:
return true;
diff --git a/arch/s390/kernel/jump_label.c b/arch/s390/kernel/jump_label.c
index c9dac2139f59..083b05f5f5ab 100644
--- a/arch/s390/kernel/jump_label.c
+++ b/arch/s390/kernel/jump_label.c
@@ -61,7 +61,7 @@ static void __jump_label_transform(struct jump_entry *entry,
{
struct insn old, new;
- if (type == JUMP_LABEL_ENABLE) {
+ if (type == JUMP_LABEL_JMP) {
jump_label_make_nop(entry, &old);
jump_label_make_branch(entry, &new);
} else {
diff --git a/arch/s390/kernel/time.c b/arch/s390/kernel/time.c
index 52524b9083c3..017c3a9bfc28 100644
--- a/arch/s390/kernel/time.c
+++ b/arch/s390/kernel/time.c
@@ -378,7 +378,7 @@ static void disable_sync_clock(void *dummy)
* increase the "sequence" counter to avoid the race of an
* etr event and the complete recovery against get_sync_clock.
*/
- atomic_clear_mask(0x80000000, sw_ptr);
+ atomic_andnot(0x80000000, sw_ptr);
atomic_inc(sw_ptr);
}
@@ -389,7 +389,7 @@ static void disable_sync_clock(void *dummy)
static void enable_sync_clock(void)
{
atomic_t *sw_ptr = this_cpu_ptr(&clock_sync_word);
- atomic_set_mask(0x80000000, sw_ptr);
+ atomic_or(0x80000000, sw_ptr);
}
/*
diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c
index b277d50dcf76..5c2c169395c3 100644
--- a/arch/s390/kvm/interrupt.c
+++ b/arch/s390/kvm/interrupt.c
@@ -173,20 +173,20 @@ static unsigned long deliverable_irqs(struct kvm_vcpu *vcpu)
static void __set_cpu_idle(struct kvm_vcpu *vcpu)
{
- atomic_set_mask(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags);
+ atomic_or(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags);
set_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask);
}
static void __unset_cpu_idle(struct kvm_vcpu *vcpu)
{
- atomic_clear_mask(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags);
+ atomic_andnot(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags);
clear_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask);
}
static void __reset_intercept_indicators(struct kvm_vcpu *vcpu)
{
- atomic_clear_mask(CPUSTAT_IO_INT | CPUSTAT_EXT_INT | CPUSTAT_STOP_INT,
- &vcpu->arch.sie_block->cpuflags);
+ atomic_andnot(CPUSTAT_IO_INT | CPUSTAT_EXT_INT | CPUSTAT_STOP_INT,
+ &vcpu->arch.sie_block->cpuflags);
vcpu->arch.sie_block->lctl = 0x0000;
vcpu->arch.sie_block->ictl &= ~(ICTL_LPSW | ICTL_STCTL | ICTL_PINT);
@@ -199,7 +199,7 @@ static void __reset_intercept_indicators(struct kvm_vcpu *vcpu)
static void __set_cpuflag(struct kvm_vcpu *vcpu, u32 flag)
{
- atomic_set_mask(flag, &vcpu->arch.sie_block->cpuflags);
+ atomic_or(flag, &vcpu->arch.sie_block->cpuflags);
}
static void set_intercept_indicators_io(struct kvm_vcpu *vcpu)
@@ -928,7 +928,7 @@ void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu)
spin_unlock(&li->lock);
/* clear pending external calls set by sigp interpretation facility */
- atomic_clear_mask(CPUSTAT_ECALL_PEND, li->cpuflags);
+ atomic_andnot(CPUSTAT_ECALL_PEND, li->cpuflags);
vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sigp_ctrl = 0;
}
@@ -1026,7 +1026,7 @@ static int __inject_pfault_init(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
li->irq.ext = irq->u.ext;
set_bit(IRQ_PEND_PFAULT_INIT, &li->pending_irqs);
- atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
+ atomic_or(CPUSTAT_EXT_INT, li->cpuflags);
return 0;
}
@@ -1041,7 +1041,7 @@ static int __inject_extcall_sigpif(struct kvm_vcpu *vcpu, uint16_t src_id)
/* another external call is pending */
return -EBUSY;
}
- atomic_set_mask(CPUSTAT_ECALL_PEND, &vcpu->arch.sie_block->cpuflags);
+ atomic_or(CPUSTAT_ECALL_PEND, &vcpu->arch.sie_block->cpuflags);
return 0;
}
@@ -1067,7 +1067,7 @@ static int __inject_extcall(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
if (test_and_set_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs))
return -EBUSY;
*extcall = irq->u.extcall;
- atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
+ atomic_or(CPUSTAT_EXT_INT, li->cpuflags);
return 0;
}
@@ -1139,7 +1139,7 @@ static int __inject_sigp_emergency(struct kvm_vcpu *vcpu,
set_bit(irq->u.emerg.code, li->sigp_emerg_pending);
set_bit(IRQ_PEND_EXT_EMERGENCY, &li->pending_irqs);
- atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
+ atomic_or(CPUSTAT_EXT_INT, li->cpuflags);
return 0;
}
@@ -1183,7 +1183,7 @@ static int __inject_ckc(struct kvm_vcpu *vcpu)
0, 0);
set_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
- atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
+ atomic_or(CPUSTAT_EXT_INT, li->cpuflags);
return 0;
}
@@ -1196,7 +1196,7 @@ static int __inject_cpu_timer(struct kvm_vcpu *vcpu)
0, 0);
set_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
- atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
+ atomic_or(CPUSTAT_EXT_INT, li->cpuflags);
return 0;
}
@@ -1375,13 +1375,13 @@ static void __floating_irq_kick(struct kvm *kvm, u64 type)
spin_lock(&li->lock);
switch (type) {
case KVM_S390_MCHK:
- atomic_set_mask(CPUSTAT_STOP_INT, li->cpuflags);
+ atomic_or(CPUSTAT_STOP_INT, li->cpuflags);
break;
case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
- atomic_set_mask(CPUSTAT_IO_INT, li->cpuflags);
+ atomic_or(CPUSTAT_IO_INT, li->cpuflags);
break;
default:
- atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
+ atomic_or(CPUSTAT_EXT_INT, li->cpuflags);
break;
}
spin_unlock(&li->lock);
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index 98df53c01343..c91eb941b444 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -1333,12 +1333,12 @@ void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
save_access_regs(vcpu->arch.host_acrs);
restore_access_regs(vcpu->run->s.regs.acrs);
gmap_enable(vcpu->arch.gmap);
- atomic_set_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags);
+ atomic_or(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags);
}
void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
{
- atomic_clear_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags);
+ atomic_andnot(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags);
gmap_disable(vcpu->arch.gmap);
save_fpu_regs();
@@ -1443,9 +1443,9 @@ int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
CPUSTAT_STOPPED);
if (test_kvm_facility(vcpu->kvm, 78))
- atomic_set_mask(CPUSTAT_GED2, &vcpu->arch.sie_block->cpuflags);
+ atomic_or(CPUSTAT_GED2, &vcpu->arch.sie_block->cpuflags);
else if (test_kvm_facility(vcpu->kvm, 8))
- atomic_set_mask(CPUSTAT_GED, &vcpu->arch.sie_block->cpuflags);
+ atomic_or(CPUSTAT_GED, &vcpu->arch.sie_block->cpuflags);
kvm_s390_vcpu_setup_model(vcpu);
@@ -1557,24 +1557,24 @@ int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu)
void kvm_s390_vcpu_block(struct kvm_vcpu *vcpu)
{
- atomic_set_mask(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20);
+ atomic_or(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20);
exit_sie(vcpu);
}
void kvm_s390_vcpu_unblock(struct kvm_vcpu *vcpu)
{
- atomic_clear_mask(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20);
+ atomic_andnot(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20);
}
static void kvm_s390_vcpu_request(struct kvm_vcpu *vcpu)
{
- atomic_set_mask(PROG_REQUEST, &vcpu->arch.sie_block->prog20);
+ atomic_or(PROG_REQUEST, &vcpu->arch.sie_block->prog20);
exit_sie(vcpu);
}
static void kvm_s390_vcpu_request_handled(struct kvm_vcpu *vcpu)
{
- atomic_clear_mask(PROG_REQUEST, &vcpu->arch.sie_block->prog20);
+ atomic_or(PROG_REQUEST, &vcpu->arch.sie_block->prog20);
}
/*
@@ -1583,7 +1583,7 @@ static void kvm_s390_vcpu_request_handled(struct kvm_vcpu *vcpu)
* return immediately. */
void exit_sie(struct kvm_vcpu *vcpu)
{
- atomic_set_mask(CPUSTAT_STOP_INT, &vcpu->arch.sie_block->cpuflags);
+ atomic_or(CPUSTAT_STOP_INT, &vcpu->arch.sie_block->cpuflags);
while (vcpu->arch.sie_block->prog0c & PROG_IN_SIE)
cpu_relax();
}
@@ -1807,19 +1807,19 @@ int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
if (dbg->control & KVM_GUESTDBG_ENABLE) {
vcpu->guest_debug = dbg->control;
/* enforce guest PER */
- atomic_set_mask(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags);
+ atomic_or(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags);
if (dbg->control & KVM_GUESTDBG_USE_HW_BP)
rc = kvm_s390_import_bp_data(vcpu, dbg);
} else {
- atomic_clear_mask(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags);
+ atomic_andnot(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags);
vcpu->arch.guestdbg.last_bp = 0;
}
if (rc) {
vcpu->guest_debug = 0;
kvm_s390_clear_bp_data(vcpu);
- atomic_clear_mask(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags);
+ atomic_andnot(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags);
}
return rc;
@@ -1894,7 +1894,7 @@ retry:
if (kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu)) {
if (!ibs_enabled(vcpu)) {
trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 1);
- atomic_set_mask(CPUSTAT_IBS,
+ atomic_or(CPUSTAT_IBS,
&vcpu->arch.sie_block->cpuflags);
}
goto retry;
@@ -1903,7 +1903,7 @@ retry:
if (kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu)) {
if (ibs_enabled(vcpu)) {
trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 0);
- atomic_clear_mask(CPUSTAT_IBS,
+ atomic_andnot(CPUSTAT_IBS,
&vcpu->arch.sie_block->cpuflags);
}
goto retry;
@@ -2419,7 +2419,7 @@ void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu)
__disable_ibs_on_all_vcpus(vcpu->kvm);
}
- atomic_clear_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags);
+ atomic_andnot(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags);
/*
* Another VCPU might have used IBS while we were offline.
* Let's play safe and flush the VCPU at startup.
@@ -2445,7 +2445,7 @@ void kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu)
/* SIGP STOP and SIGP STOP AND STORE STATUS has been fully processed */
kvm_s390_clear_stop_irq(vcpu);
- atomic_set_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags);
+ atomic_or(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags);
__disable_ibs_on_vcpu(vcpu);
for (i = 0; i < online_vcpus; i++) {
diff --git a/arch/s390/lib/uaccess.c b/arch/s390/lib/uaccess.c
index 0d002a746bec..ae4de559e3a0 100644
--- a/arch/s390/lib/uaccess.c
+++ b/arch/s390/lib/uaccess.c
@@ -15,7 +15,7 @@
#include <asm/mmu_context.h>
#include <asm/facility.h>
-static struct static_key have_mvcos = STATIC_KEY_INIT_FALSE;
+static DEFINE_STATIC_KEY_FALSE(have_mvcos);
static inline unsigned long copy_from_user_mvcos(void *x, const void __user *ptr,
unsigned long size)
@@ -104,7 +104,7 @@ static inline unsigned long copy_from_user_mvcp(void *x, const void __user *ptr,
unsigned long __copy_from_user(void *to, const void __user *from, unsigned long n)
{
- if (static_key_false(&have_mvcos))
+ if (static_branch_likely(&have_mvcos))
return copy_from_user_mvcos(to, from, n);
return copy_from_user_mvcp(to, from, n);
}
@@ -177,7 +177,7 @@ static inline unsigned long copy_to_user_mvcs(void __user *ptr, const void *x,
unsigned long __copy_to_user(void __user *to, const void *from, unsigned long n)
{
- if (static_key_false(&have_mvcos))
+ if (static_branch_likely(&have_mvcos))
return copy_to_user_mvcos(to, from, n);
return copy_to_user_mvcs(to, from, n);
}
@@ -240,7 +240,7 @@ static inline unsigned long copy_in_user_mvc(void __user *to, const void __user
unsigned long __copy_in_user(void __user *to, const void __user *from, unsigned long n)
{
- if (static_key_false(&have_mvcos))
+ if (static_branch_likely(&have_mvcos))
return copy_in_user_mvcos(to, from, n);
return copy_in_user_mvc(to, from, n);
}
@@ -312,7 +312,7 @@ static inline unsigned long clear_user_xc(void __user *to, unsigned long size)
unsigned long __clear_user(void __user *to, unsigned long size)
{
- if (static_key_false(&have_mvcos))
+ if (static_branch_likely(&have_mvcos))
return clear_user_mvcos(to, size);
return clear_user_xc(to, size);
}
@@ -373,7 +373,7 @@ EXPORT_SYMBOL(__strncpy_from_user);
static int __init uaccess_init(void)
{
if (test_facility(27))
- static_key_slow_inc(&have_mvcos);
+ static_branch_enable(&have_mvcos);
return 0;
}
early_initcall(uaccess_init);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-04 10:22:37 +0000