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-rw-r--r--arch/s390/crypto/paes_s390.c5
-rw-r--r--arch/s390/include/asm/cputime.h20
-rw-r--r--arch/s390/include/asm/thread_info.h24
-rw-r--r--arch/s390/include/asm/timex.h12
-rw-r--r--arch/s390/kernel/entry.S41
-rw-r--r--arch/s390/kernel/process.c3
-rw-r--r--arch/s390/kernel/vtime.c2
-rw-r--r--arch/s390/kvm/kvm-s390.c14
-rw-r--r--arch/s390/kvm/priv.c1
9 files changed, 80 insertions, 42 deletions
diff --git a/arch/s390/crypto/paes_s390.c b/arch/s390/crypto/paes_s390.c
index d69ea495c4d7..716b17238599 100644
--- a/arch/s390/crypto/paes_s390.c
+++ b/arch/s390/crypto/paes_s390.c
@@ -474,8 +474,11 @@ static int ctr_paes_crypt(struct blkcipher_desc *desc, unsigned long modifier,
ret = blkcipher_walk_done(desc, walk, nbytes - n);
}
if (k < n) {
- if (__ctr_paes_set_key(ctx) != 0)
+ if (__ctr_paes_set_key(ctx) != 0) {
+ if (locked)
+ spin_unlock(&ctrblk_lock);
return blkcipher_walk_done(desc, walk, -EIO);
+ }
}
}
if (locked)
diff --git a/arch/s390/include/asm/cputime.h b/arch/s390/include/asm/cputime.h
index d1c407ddf703..9072bf63a846 100644
--- a/arch/s390/include/asm/cputime.h
+++ b/arch/s390/include/asm/cputime.h
@@ -8,31 +8,27 @@
#define _S390_CPUTIME_H
#include <linux/types.h>
-#include <asm/div64.h>
+#include <asm/timex.h>
#define CPUTIME_PER_USEC 4096ULL
#define CPUTIME_PER_SEC (CPUTIME_PER_USEC * USEC_PER_SEC)
/* We want to use full resolution of the CPU timer: 2**-12 micro-seconds. */
-typedef unsigned long long __nocast cputime_t;
-typedef unsigned long long __nocast cputime64_t;
-
#define cmpxchg_cputime(ptr, old, new) cmpxchg64(ptr, old, new)
-static inline unsigned long __div(unsigned long long n, unsigned long base)
-{
- return n / base;
-}
-
/*
- * Convert cputime to microseconds and back.
+ * Convert cputime to microseconds.
*/
-static inline unsigned int cputime_to_usecs(const cputime_t cputime)
+static inline u64 cputime_to_usecs(const u64 cputime)
{
- return (__force unsigned long long) cputime >> 12;
+ return cputime >> 12;
}
+/*
+ * Convert cputime to nanoseconds.
+ */
+#define cputime_to_nsecs(cputime) tod_to_ns(cputime)
u64 arch_cpu_idle_time(int cpu);
diff --git a/arch/s390/include/asm/thread_info.h b/arch/s390/include/asm/thread_info.h
index a5b54a445eb8..646845edf148 100644
--- a/arch/s390/include/asm/thread_info.h
+++ b/arch/s390/include/asm/thread_info.h
@@ -51,14 +51,13 @@ int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src);
/*
* thread information flags bit numbers
*/
+/* _TIF_WORK bits */
#define TIF_NOTIFY_RESUME 0 /* callback before returning to user */
#define TIF_SIGPENDING 1 /* signal pending */
#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
-#define TIF_SYSCALL_TRACE 3 /* syscall trace active */
-#define TIF_SYSCALL_AUDIT 4 /* syscall auditing active */
-#define TIF_SECCOMP 5 /* secure computing */
-#define TIF_SYSCALL_TRACEPOINT 6 /* syscall tracepoint instrumentation */
-#define TIF_UPROBE 7 /* breakpointed or single-stepping */
+#define TIF_UPROBE 3 /* breakpointed or single-stepping */
+#define TIF_PATCH_PENDING 4 /* pending live patching update */
+
#define TIF_31BIT 16 /* 32bit process */
#define TIF_MEMDIE 17 /* is terminating due to OOM killer */
#define TIF_RESTORE_SIGMASK 18 /* restore signal mask in do_signal() */
@@ -66,15 +65,24 @@ int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src);
#define TIF_BLOCK_STEP 20 /* This task is block stepped */
#define TIF_UPROBE_SINGLESTEP 21 /* This task is uprobe single stepped */
+/* _TIF_TRACE bits */
+#define TIF_SYSCALL_TRACE 24 /* syscall trace active */
+#define TIF_SYSCALL_AUDIT 25 /* syscall auditing active */
+#define TIF_SECCOMP 26 /* secure computing */
+#define TIF_SYSCALL_TRACEPOINT 27 /* syscall tracepoint instrumentation */
+
#define _TIF_NOTIFY_RESUME _BITUL(TIF_NOTIFY_RESUME)
#define _TIF_SIGPENDING _BITUL(TIF_SIGPENDING)
#define _TIF_NEED_RESCHED _BITUL(TIF_NEED_RESCHED)
+#define _TIF_UPROBE _BITUL(TIF_UPROBE)
+#define _TIF_PATCH_PENDING _BITUL(TIF_PATCH_PENDING)
+
+#define _TIF_31BIT _BITUL(TIF_31BIT)
+#define _TIF_SINGLE_STEP _BITUL(TIF_SINGLE_STEP)
+
#define _TIF_SYSCALL_TRACE _BITUL(TIF_SYSCALL_TRACE)
#define _TIF_SYSCALL_AUDIT _BITUL(TIF_SYSCALL_AUDIT)
#define _TIF_SECCOMP _BITUL(TIF_SECCOMP)
#define _TIF_SYSCALL_TRACEPOINT _BITUL(TIF_SYSCALL_TRACEPOINT)
-#define _TIF_UPROBE _BITUL(TIF_UPROBE)
-#define _TIF_31BIT _BITUL(TIF_31BIT)
-#define _TIF_SINGLE_STEP _BITUL(TIF_SINGLE_STEP)
#endif /* _ASM_THREAD_INFO_H */
diff --git a/arch/s390/include/asm/timex.h b/arch/s390/include/asm/timex.h
index 354344dcc198..118535123f34 100644
--- a/arch/s390/include/asm/timex.h
+++ b/arch/s390/include/asm/timex.h
@@ -206,20 +206,16 @@ static inline unsigned long long get_tod_clock_monotonic(void)
* ns = (todval * 125) >> 9;
*
* In order to avoid an overflow with the multiplication we can rewrite this.
- * With a split todval == 2^32 * th + tl (th upper 32 bits, tl lower 32 bits)
+ * With a split todval == 2^9 * th + tl (th upper 55 bits, tl lower 9 bits)
* we end up with
*
- * ns = ((2^32 * th + tl) * 125 ) >> 9;
- * -> ns = (2^23 * th * 125) + ((tl * 125) >> 9);
+ * ns = ((2^9 * th + tl) * 125 ) >> 9;
+ * -> ns = (th * 125) + ((tl * 125) >> 9);
*
*/
static inline unsigned long long tod_to_ns(unsigned long long todval)
{
- unsigned long long ns;
-
- ns = ((todval >> 32) << 23) * 125;
- ns += ((todval & 0xffffffff) * 125) >> 9;
- return ns;
+ return ((todval >> 9) * 125) + (((todval & 0x1ff) * 125) >> 9);
}
#endif
diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S
index dff2152350a7..982bc1e6a31d 100644
--- a/arch/s390/kernel/entry.S
+++ b/arch/s390/kernel/entry.S
@@ -47,7 +47,7 @@ STACK_SIZE = 1 << STACK_SHIFT
STACK_INIT = STACK_SIZE - STACK_FRAME_OVERHEAD - __PT_SIZE
_TIF_WORK = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED | \
- _TIF_UPROBE)
+ _TIF_UPROBE | _TIF_PATCH_PENDING)
_TIF_TRACE = (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | _TIF_SECCOMP | \
_TIF_SYSCALL_TRACEPOINT)
_CIF_WORK = (_CIF_MCCK_PENDING | _CIF_ASCE_PRIMARY | \
@@ -334,6 +334,11 @@ ENTRY(system_call)
#endif
TSTMSK __PT_FLAGS(%r11),_PIF_PER_TRAP
jo .Lsysc_singlestep
+#ifdef CONFIG_LIVEPATCH
+ TSTMSK __TI_flags(%r12),_TIF_PATCH_PENDING
+ jo .Lsysc_patch_pending # handle live patching just before
+ # signals and possible syscall restart
+#endif
TSTMSK __TI_flags(%r12),_TIF_SIGPENDING
jo .Lsysc_sigpending
TSTMSK __TI_flags(%r12),_TIF_NOTIFY_RESUME
@@ -409,6 +414,16 @@ ENTRY(system_call)
#endif
#
+# _TIF_PATCH_PENDING is set, call klp_update_patch_state
+#
+#ifdef CONFIG_LIVEPATCH
+.Lsysc_patch_pending:
+ lg %r2,__LC_CURRENT # pass pointer to task struct
+ larl %r14,.Lsysc_return
+ jg klp_update_patch_state
+#endif
+
+#
# _PIF_PER_TRAP is set, call do_per_trap
#
.Lsysc_singlestep:
@@ -490,7 +505,7 @@ ENTRY(pgm_check_handler)
jnz .Lpgm_svcper # -> single stepped svc
1: CHECK_STACK STACK_SIZE,__LC_SAVE_AREA_SYNC
aghi %r15,-(STACK_FRAME_OVERHEAD + __PT_SIZE)
- j 3f
+ j 4f
2: UPDATE_VTIME %r14,%r15,__LC_SYNC_ENTER_TIMER
lg %r15,__LC_KERNEL_STACK
lgr %r14,%r12
@@ -499,8 +514,8 @@ ENTRY(pgm_check_handler)
tm __LC_PGM_ILC+2,0x02 # check for transaction abort
jz 3f
mvc __THREAD_trap_tdb(256,%r14),0(%r13)
-3: la %r11,STACK_FRAME_OVERHEAD(%r15)
- stg %r10,__THREAD_last_break(%r14)
+3: stg %r10,__THREAD_last_break(%r14)
+4: la %r11,STACK_FRAME_OVERHEAD(%r15)
stmg %r0,%r7,__PT_R0(%r11)
mvc __PT_R8(64,%r11),__LC_SAVE_AREA_SYNC
stmg %r8,%r9,__PT_PSW(%r11)
@@ -509,14 +524,14 @@ ENTRY(pgm_check_handler)
xc __PT_FLAGS(8,%r11),__PT_FLAGS(%r11)
stg %r10,__PT_ARGS(%r11)
tm __LC_PGM_ILC+3,0x80 # check for per exception
- jz 4f
+ jz 5f
tmhh %r8,0x0001 # kernel per event ?
jz .Lpgm_kprobe
oi __PT_FLAGS+7(%r11),_PIF_PER_TRAP
mvc __THREAD_per_address(8,%r14),__LC_PER_ADDRESS
mvc __THREAD_per_cause(2,%r14),__LC_PER_CODE
mvc __THREAD_per_paid(1,%r14),__LC_PER_ACCESS_ID
-4: REENABLE_IRQS
+5: REENABLE_IRQS
xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15)
larl %r1,pgm_check_table
llgh %r10,__PT_INT_CODE+2(%r11)
@@ -659,6 +674,10 @@ ENTRY(io_int_handler)
jo .Lio_mcck_pending
TSTMSK __TI_flags(%r12),_TIF_NEED_RESCHED
jo .Lio_reschedule
+#ifdef CONFIG_LIVEPATCH
+ TSTMSK __TI_flags(%r12),_TIF_PATCH_PENDING
+ jo .Lio_patch_pending
+#endif
TSTMSK __TI_flags(%r12),_TIF_SIGPENDING
jo .Lio_sigpending
TSTMSK __TI_flags(%r12),_TIF_NOTIFY_RESUME
@@ -708,6 +727,16 @@ ENTRY(io_int_handler)
j .Lio_return
#
+# _TIF_PATCH_PENDING is set, call klp_update_patch_state
+#
+#ifdef CONFIG_LIVEPATCH
+.Lio_patch_pending:
+ lg %r2,__LC_CURRENT # pass pointer to task struct
+ larl %r14,.Lio_return
+ jg klp_update_patch_state
+#endif
+
+#
# _TIF_SIGPENDING or is set, call do_signal
#
.Lio_sigpending:
diff --git a/arch/s390/kernel/process.c b/arch/s390/kernel/process.c
index 20cd339e11ae..f29e41c5e2ec 100644
--- a/arch/s390/kernel/process.c
+++ b/arch/s390/kernel/process.c
@@ -124,7 +124,10 @@ int copy_thread_tls(unsigned long clone_flags, unsigned long new_stackp,
clear_tsk_thread_flag(p, TIF_SINGLE_STEP);
/* Initialize per thread user and system timer values */
p->thread.user_timer = 0;
+ p->thread.guest_timer = 0;
p->thread.system_timer = 0;
+ p->thread.hardirq_timer = 0;
+ p->thread.softirq_timer = 0;
frame->sf.back_chain = 0;
/* new return point is ret_from_fork */
diff --git a/arch/s390/kernel/vtime.c b/arch/s390/kernel/vtime.c
index c14fc9029912..072d84ba42a3 100644
--- a/arch/s390/kernel/vtime.c
+++ b/arch/s390/kernel/vtime.c
@@ -111,7 +111,7 @@ static inline u64 scale_vtime(u64 vtime)
}
static void account_system_index_scaled(struct task_struct *p,
- cputime_t cputime, cputime_t scaled,
+ u64 cputime, u64 scaled,
enum cpu_usage_stat index)
{
p->stimescaled += cputime_to_nsecs(scaled);
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index fd6cd05bb6a7..5fda4686e817 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -2719,6 +2719,9 @@ static int __vcpu_run(struct kvm_vcpu *vcpu)
static void sync_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
+ struct runtime_instr_cb *riccb;
+
+ riccb = (struct runtime_instr_cb *) &kvm_run->s.regs.riccb;
vcpu->arch.sie_block->gpsw.mask = kvm_run->psw_mask;
vcpu->arch.sie_block->gpsw.addr = kvm_run->psw_addr;
if (kvm_run->kvm_dirty_regs & KVM_SYNC_PREFIX)
@@ -2747,12 +2750,11 @@ static void sync_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
* we should enable RI here instead of doing the lazy enablement.
*/
if ((kvm_run->kvm_dirty_regs & KVM_SYNC_RICCB) &&
- test_kvm_facility(vcpu->kvm, 64)) {
- struct runtime_instr_cb *riccb =
- (struct runtime_instr_cb *) &kvm_run->s.regs.riccb;
-
- if (riccb->valid)
- vcpu->arch.sie_block->ecb3 |= 0x01;
+ test_kvm_facility(vcpu->kvm, 64) &&
+ riccb->valid &&
+ !(vcpu->arch.sie_block->ecb3 & 0x01)) {
+ VCPU_EVENT(vcpu, 3, "%s", "ENABLE: RI (sync_regs)");
+ vcpu->arch.sie_block->ecb3 |= 0x01;
}
save_access_regs(vcpu->arch.host_acrs);
restore_access_regs(vcpu->run->s.regs.acrs);
diff --git a/arch/s390/kvm/priv.c b/arch/s390/kvm/priv.c
index 64b6a309f2c4..93d6cde8c3ea 100644
--- a/arch/s390/kvm/priv.c
+++ b/arch/s390/kvm/priv.c
@@ -37,6 +37,7 @@
static int handle_ri(struct kvm_vcpu *vcpu)
{
if (test_kvm_facility(vcpu->kvm, 64)) {
+ VCPU_EVENT(vcpu, 3, "%s", "ENABLE: RI (lazy)");
vcpu->arch.sie_block->ecb3 |= 0x01;
kvm_s390_retry_instr(vcpu);
return 0;
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-10 12:34:24 +0000