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-rw-r--r--arch/powerpc/include/asm/atomic.h4
-rw-r--r--arch/powerpc/include/asm/elf.h13
-rw-r--r--arch/powerpc/include/asm/reg.h2
-rw-r--r--arch/powerpc/include/asm/topology.h14
-rw-r--r--arch/powerpc/kernel/eeh.c10
-rw-r--r--arch/powerpc/kernel/kprobes.c11
-rw-r--r--arch/powerpc/kernel/setup_64.c4
-rw-r--r--arch/powerpc/kvm/book3s_hv.c60
-rw-r--r--arch/powerpc/kvm/book3s_hv_rmhandlers.S41
-rw-r--r--arch/powerpc/lib/sstep.c19
-rw-r--r--arch/powerpc/mm/slb_low.S10
-rw-r--r--arch/powerpc/mm/slice.c2
-rw-r--r--arch/powerpc/platforms/pseries/reconfig.c1
13 files changed, 154 insertions, 37 deletions
diff --git a/arch/powerpc/include/asm/atomic.h b/arch/powerpc/include/asm/atomic.h
index 55f106ed12bf..039c4b910615 100644
--- a/arch/powerpc/include/asm/atomic.h
+++ b/arch/powerpc/include/asm/atomic.h
@@ -460,7 +460,7 @@ static __inline__ int atomic64_add_unless(atomic64_t *v, long a, long u)
* Atomically increments @v by 1, so long as @v is non-zero.
* Returns non-zero if @v was non-zero, and zero otherwise.
*/
-static __inline__ long atomic64_inc_not_zero(atomic64_t *v)
+static __inline__ int atomic64_inc_not_zero(atomic64_t *v)
{
long t1, t2;
@@ -479,7 +479,7 @@ static __inline__ long atomic64_inc_not_zero(atomic64_t *v)
: "r" (&v->counter)
: "cc", "xer", "memory");
- return t1;
+ return t1 != 0;
}
#endif /* __powerpc64__ */
diff --git a/arch/powerpc/include/asm/elf.h b/arch/powerpc/include/asm/elf.h
index ee46ffef608e..743ad7a400d6 100644
--- a/arch/powerpc/include/asm/elf.h
+++ b/arch/powerpc/include/asm/elf.h
@@ -23,12 +23,13 @@
#define CORE_DUMP_USE_REGSET
#define ELF_EXEC_PAGESIZE PAGE_SIZE
-/* This is the location that an ET_DYN program is loaded if exec'ed. Typical
- use of this is to invoke "./ld.so someprog" to test out a new version of
- the loader. We need to make sure that it is out of the way of the program
- that it will "exec", and that there is sufficient room for the brk. */
-
-#define ELF_ET_DYN_BASE 0x20000000
+/*
+ * This is the base location for PIE (ET_DYN with INTERP) loads. On
+ * 64-bit, this is raised to 4GB to leave the entire 32-bit address
+ * space open for things that want to use the area for 32-bit pointers.
+ */
+#define ELF_ET_DYN_BASE (is_32bit_task() ? 0x000400000UL : \
+ 0x100000000UL)
#define ELF_CORE_EFLAGS (is_elf2_task() ? 2 : 0)
diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h
index 627d129d7fcb..ca372bbc0ffe 100644
--- a/arch/powerpc/include/asm/reg.h
+++ b/arch/powerpc/include/asm/reg.h
@@ -1236,7 +1236,7 @@ static inline unsigned long mfvtb (void)
" .llong 0\n" \
".previous" \
: "=r" (rval) \
- : "i" (CPU_FTR_CELL_TB_BUG), "i" (SPRN_TBRL)); \
+ : "i" (CPU_FTR_CELL_TB_BUG), "i" (SPRN_TBRL) : "cr0"); \
rval;})
#else
#define mftb() ({unsigned long rval; \
diff --git a/arch/powerpc/include/asm/topology.h b/arch/powerpc/include/asm/topology.h
index 329771559cbb..8b3b46b7b0f2 100644
--- a/arch/powerpc/include/asm/topology.h
+++ b/arch/powerpc/include/asm/topology.h
@@ -44,22 +44,8 @@ extern void __init dump_numa_cpu_topology(void);
extern int sysfs_add_device_to_node(struct device *dev, int nid);
extern void sysfs_remove_device_from_node(struct device *dev, int nid);
-static inline int early_cpu_to_node(int cpu)
-{
- int nid;
-
- nid = numa_cpu_lookup_table[cpu];
-
- /*
- * Fall back to node 0 if nid is unset (it should be, except bugs).
- * This allows callers to safely do NODE_DATA(early_cpu_to_node(cpu)).
- */
- return (nid < 0) ? 0 : nid;
-}
#else
-static inline int early_cpu_to_node(int cpu) { return 0; }
-
static inline void dump_numa_cpu_topology(void) {}
static inline int sysfs_add_device_to_node(struct device *dev, int nid)
diff --git a/arch/powerpc/kernel/eeh.c b/arch/powerpc/kernel/eeh.c
index 98949b0df00a..6696c1986844 100644
--- a/arch/powerpc/kernel/eeh.c
+++ b/arch/powerpc/kernel/eeh.c
@@ -304,9 +304,17 @@ void eeh_slot_error_detail(struct eeh_pe *pe, int severity)
*
* For pHyp, we have to enable IO for log retrieval. Otherwise,
* 0xFF's is always returned from PCI config space.
+ *
+ * When the @severity is EEH_LOG_PERM, the PE is going to be
+ * removed. Prior to that, the drivers for devices included in
+ * the PE will be closed. The drivers rely on working IO path
+ * to bring the devices to quiet state. Otherwise, PCI traffic
+ * from those devices after they are removed is like to cause
+ * another unexpected EEH error.
*/
if (!(pe->type & EEH_PE_PHB)) {
- if (eeh_has_flag(EEH_ENABLE_IO_FOR_LOG))
+ if (eeh_has_flag(EEH_ENABLE_IO_FOR_LOG) ||
+ severity == EEH_LOG_PERM)
eeh_pci_enable(pe, EEH_OPT_THAW_MMIO);
/*
diff --git a/arch/powerpc/kernel/kprobes.c b/arch/powerpc/kernel/kprobes.c
index 7c053f281406..1138fec3dd65 100644
--- a/arch/powerpc/kernel/kprobes.c
+++ b/arch/powerpc/kernel/kprobes.c
@@ -514,6 +514,15 @@ int __kprobes setjmp_pre_handler(struct kprobe *p, struct pt_regs *regs)
#endif
#endif
+ /*
+ * jprobes use jprobe_return() which skips the normal return
+ * path of the function, and this messes up the accounting of the
+ * function graph tracer.
+ *
+ * Pause function graph tracing while performing the jprobe function.
+ */
+ pause_graph_tracing();
+
return 1;
}
@@ -536,6 +545,8 @@ int __kprobes longjmp_break_handler(struct kprobe *p, struct pt_regs *regs)
* saved regs...
*/
memcpy(regs, &kcb->jprobe_saved_regs, sizeof(struct pt_regs));
+ /* It's OK to start function graph tracing again */
+ unpause_graph_tracing();
preempt_enable_no_resched();
return 1;
}
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index fe6e800c1357..a20823210ac0 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c
@@ -751,7 +751,7 @@ void __init setup_arch(char **cmdline_p)
static void * __init pcpu_fc_alloc(unsigned int cpu, size_t size, size_t align)
{
- return __alloc_bootmem_node(NODE_DATA(early_cpu_to_node(cpu)), size, align,
+ return __alloc_bootmem_node(NODE_DATA(cpu_to_node(cpu)), size, align,
__pa(MAX_DMA_ADDRESS));
}
@@ -762,7 +762,7 @@ static void __init pcpu_fc_free(void *ptr, size_t size)
static int pcpu_cpu_distance(unsigned int from, unsigned int to)
{
- if (early_cpu_to_node(from) == early_cpu_to_node(to))
+ if (cpu_to_node(from) == cpu_to_node(to))
return LOCAL_DISTANCE;
else
return REMOTE_DISTANCE;
diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c
index 3c3a367b6e59..428563b195c3 100644
--- a/arch/powerpc/kvm/book3s_hv.c
+++ b/arch/powerpc/kvm/book3s_hv.c
@@ -2687,12 +2687,38 @@ static int kvmppc_vcpu_run_hv(struct kvm_run *run, struct kvm_vcpu *vcpu)
{
int r;
int srcu_idx;
+ unsigned long ebb_regs[3] = {}; /* shut up GCC */
+ unsigned long user_tar = 0;
+ unsigned long proc_fscr = 0;
+ unsigned int user_vrsave;
if (!vcpu->arch.sane) {
run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
return -EINVAL;
}
+ /*
+ * Don't allow entry with a suspended transaction, because
+ * the guest entry/exit code will lose it.
+ * If the guest has TM enabled, save away their TM-related SPRs
+ * (they will get restored by the TM unavailable interrupt).
+ */
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+ if (cpu_has_feature(CPU_FTR_TM) && current->thread.regs &&
+ (current->thread.regs->msr & MSR_TM)) {
+ if (MSR_TM_ACTIVE(current->thread.regs->msr)) {
+ run->exit_reason = KVM_EXIT_FAIL_ENTRY;
+ run->fail_entry.hardware_entry_failure_reason = 0;
+ return -EINVAL;
+ }
+ /* Enable TM so we can read the TM SPRs */
+ mtmsr(mfmsr() | MSR_TM);
+ current->thread.tm_tfhar = mfspr(SPRN_TFHAR);
+ current->thread.tm_tfiar = mfspr(SPRN_TFIAR);
+ current->thread.tm_texasr = mfspr(SPRN_TEXASR);
+ }
+#endif
+
kvmppc_core_prepare_to_enter(vcpu);
/* No need to go into the guest when all we'll do is come back out */
@@ -2715,6 +2741,17 @@ static int kvmppc_vcpu_run_hv(struct kvm_run *run, struct kvm_vcpu *vcpu)
flush_fp_to_thread(current);
flush_altivec_to_thread(current);
flush_vsx_to_thread(current);
+
+ /* Save userspace EBB and other register values */
+ if (cpu_has_feature(CPU_FTR_ARCH_207S)) {
+ ebb_regs[0] = mfspr(SPRN_EBBHR);
+ ebb_regs[1] = mfspr(SPRN_EBBRR);
+ ebb_regs[2] = mfspr(SPRN_BESCR);
+ user_tar = mfspr(SPRN_TAR);
+ proc_fscr = mfspr(SPRN_FSCR);
+ }
+ user_vrsave = mfspr(SPRN_VRSAVE);
+
vcpu->arch.wqp = &vcpu->arch.vcore->wq;
vcpu->arch.pgdir = current->mm->pgd;
vcpu->arch.state = KVMPPC_VCPU_BUSY_IN_HOST;
@@ -2736,6 +2773,29 @@ static int kvmppc_vcpu_run_hv(struct kvm_run *run, struct kvm_vcpu *vcpu)
}
} while (is_kvmppc_resume_guest(r));
+ /* Restore userspace EBB and other register values */
+ if (cpu_has_feature(CPU_FTR_ARCH_207S)) {
+ mtspr(SPRN_EBBHR, ebb_regs[0]);
+ mtspr(SPRN_EBBRR, ebb_regs[1]);
+ mtspr(SPRN_BESCR, ebb_regs[2]);
+ mtspr(SPRN_TAR, user_tar);
+ mtspr(SPRN_FSCR, proc_fscr);
+ }
+ mtspr(SPRN_VRSAVE, user_vrsave);
+
+ /*
+ * Since we don't do lazy TM reload, we need to reload
+ * the TM registers here.
+ */
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+ if (cpu_has_feature(CPU_FTR_TM) && current->thread.regs &&
+ (current->thread.regs->msr & MSR_TM)) {
+ mtspr(SPRN_TFHAR, current->thread.tm_tfhar);
+ mtspr(SPRN_TFIAR, current->thread.tm_tfiar);
+ mtspr(SPRN_TEXASR, current->thread.tm_texasr);
+ }
+#endif
+
out:
vcpu->arch.state = KVMPPC_VCPU_NOTREADY;
atomic_dec(&vcpu->kvm->arch.vcpus_running);
diff --git a/arch/powerpc/kvm/book3s_hv_rmhandlers.S b/arch/powerpc/kvm/book3s_hv_rmhandlers.S
index 1a743f87b37d..ffab9269bfe4 100644
--- a/arch/powerpc/kvm/book3s_hv_rmhandlers.S
+++ b/arch/powerpc/kvm/book3s_hv_rmhandlers.S
@@ -36,6 +36,13 @@
#define NAPPING_CEDE 1
#define NAPPING_NOVCPU 2
+/* Stack frame offsets for kvmppc_hv_entry */
+#define SFS 112
+#define STACK_SLOT_TRAP (SFS-4)
+#define STACK_SLOT_CIABR (SFS-16)
+#define STACK_SLOT_DAWR (SFS-24)
+#define STACK_SLOT_DAWRX (SFS-32)
+
/*
* Call kvmppc_hv_entry in real mode.
* Must be called with interrupts hard-disabled.
@@ -274,10 +281,10 @@ kvm_novcpu_exit:
bl kvmhv_accumulate_time
#endif
13: mr r3, r12
- stw r12, 112-4(r1)
+ stw r12, STACK_SLOT_TRAP(r1)
bl kvmhv_commence_exit
nop
- lwz r12, 112-4(r1)
+ lwz r12, STACK_SLOT_TRAP(r1)
b kvmhv_switch_to_host
/*
@@ -489,7 +496,7 @@ kvmppc_hv_entry:
*/
mflr r0
std r0, PPC_LR_STKOFF(r1)
- stdu r1, -112(r1)
+ stdu r1, -SFS(r1)
/* Save R1 in the PACA */
std r1, HSTATE_HOST_R1(r13)
@@ -643,6 +650,16 @@ kvmppc_got_guest:
mtspr SPRN_PURR,r7
mtspr SPRN_SPURR,r8
+ /* Save host values of some registers */
+BEGIN_FTR_SECTION
+ mfspr r5, SPRN_CIABR
+ mfspr r6, SPRN_DAWR
+ mfspr r7, SPRN_DAWRX
+ std r5, STACK_SLOT_CIABR(r1)
+ std r6, STACK_SLOT_DAWR(r1)
+ std r7, STACK_SLOT_DAWRX(r1)
+END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S)
+
BEGIN_FTR_SECTION
/* Set partition DABR */
/* Do this before re-enabling PMU to avoid P7 DABR corruption bug */
@@ -1266,8 +1283,7 @@ END_FTR_SECTION_IFCLR(CPU_FTR_ARCH_207S)
*/
li r0, 0
mtspr SPRN_IAMR, r0
- mtspr SPRN_CIABR, r0
- mtspr SPRN_DAWRX, r0
+ mtspr SPRN_PSPB, r0
mtspr SPRN_TCSCR, r0
mtspr SPRN_WORT, r0
/* Set MMCRS to 1<<31 to freeze and disable the SPMC counters */
@@ -1283,6 +1299,7 @@ END_FTR_SECTION_IFCLR(CPU_FTR_ARCH_207S)
std r6,VCPU_UAMOR(r9)
li r6,0
mtspr SPRN_AMR,r6
+ mtspr SPRN_UAMOR, r6
/* Switch DSCR back to host value */
mfspr r8, SPRN_DSCR
@@ -1424,6 +1441,16 @@ END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S)
slbia
ptesync
+ /* Restore host values of some registers */
+BEGIN_FTR_SECTION
+ ld r5, STACK_SLOT_CIABR(r1)
+ ld r6, STACK_SLOT_DAWR(r1)
+ ld r7, STACK_SLOT_DAWRX(r1)
+ mtspr SPRN_CIABR, r5
+ mtspr SPRN_DAWR, r6
+ mtspr SPRN_DAWRX, r7
+END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S)
+
/*
* POWER7/POWER8 guest -> host partition switch code.
* We don't have to lock against tlbies but we do
@@ -1533,8 +1560,8 @@ END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S)
li r0, KVM_GUEST_MODE_NONE
stb r0, HSTATE_IN_GUEST(r13)
- ld r0, 112+PPC_LR_STKOFF(r1)
- addi r1, r1, 112
+ ld r0, SFS+PPC_LR_STKOFF(r1)
+ addi r1, r1, SFS
mtlr r0
blr
diff --git a/arch/powerpc/lib/sstep.c b/arch/powerpc/lib/sstep.c
index 4014881e9843..e37162d356d8 100644
--- a/arch/powerpc/lib/sstep.c
+++ b/arch/powerpc/lib/sstep.c
@@ -687,8 +687,10 @@ int __kprobes analyse_instr(struct instruction_op *op, struct pt_regs *regs,
case 19:
switch ((instr >> 1) & 0x3ff) {
case 0: /* mcrf */
- rd = (instr >> 21) & 0x1c;
- ra = (instr >> 16) & 0x1c;
+ rd = 7 - ((instr >> 23) & 0x7);
+ ra = 7 - ((instr >> 18) & 0x7);
+ rd *= 4;
+ ra *= 4;
val = (regs->ccr >> ra) & 0xf;
regs->ccr = (regs->ccr & ~(0xfUL << rd)) | (val << rd);
goto instr_done;
@@ -967,6 +969,19 @@ int __kprobes analyse_instr(struct instruction_op *op, struct pt_regs *regs,
#endif
case 19: /* mfcr */
+ if ((instr >> 20) & 1) {
+ imm = 0xf0000000UL;
+ for (sh = 0; sh < 8; ++sh) {
+ if (instr & (0x80000 >> sh)) {
+ regs->gpr[rd] = regs->ccr & imm;
+ break;
+ }
+ imm >>= 4;
+ }
+
+ goto instr_done;
+ }
+
regs->gpr[rd] = regs->ccr;
regs->gpr[rd] &= 0xffffffffUL;
goto instr_done;
diff --git a/arch/powerpc/mm/slb_low.S b/arch/powerpc/mm/slb_low.S
index 4c48b487698c..0b48ce40d351 100644
--- a/arch/powerpc/mm/slb_low.S
+++ b/arch/powerpc/mm/slb_low.S
@@ -179,6 +179,16 @@ END_MMU_FTR_SECTION_IFSET(MMU_FTR_1T_SEGMENT)
b slb_finish_load
8: /* invalid EA */
+ /*
+ * It's possible the bad EA is too large to fit in the SLB cache, which
+ * would mean we'd fail to invalidate it on context switch. So mark the
+ * SLB cache as full so we force a full flush. We also set cr7+eq to
+ * mark the address as a kernel address, so slb_finish_load() skips
+ * trying to insert it into the SLB cache.
+ */
+ li r9,SLB_CACHE_ENTRIES + 1
+ sth r9,PACASLBCACHEPTR(r13)
+ crset 4*cr7+eq
li r10,0 /* BAD_VSID */
li r9,0 /* BAD_VSID */
li r11,SLB_VSID_USER /* flags don't much matter */
diff --git a/arch/powerpc/mm/slice.c b/arch/powerpc/mm/slice.c
index 0f432a702870..6ad12b244770 100644
--- a/arch/powerpc/mm/slice.c
+++ b/arch/powerpc/mm/slice.c
@@ -105,7 +105,7 @@ static int slice_area_is_free(struct mm_struct *mm, unsigned long addr,
if ((mm->task_size - len) < addr)
return 0;
vma = find_vma(mm, addr);
- return (!vma || (addr + len) <= vma->vm_start);
+ return (!vma || (addr + len) <= vm_start_gap(vma));
}
static int slice_low_has_vma(struct mm_struct *mm, unsigned long slice)
diff --git a/arch/powerpc/platforms/pseries/reconfig.c b/arch/powerpc/platforms/pseries/reconfig.c
index 7c7fcc042549..fb695f142563 100644
--- a/arch/powerpc/platforms/pseries/reconfig.c
+++ b/arch/powerpc/platforms/pseries/reconfig.c
@@ -82,7 +82,6 @@ static int pSeries_reconfig_remove_node(struct device_node *np)
of_detach_node(np);
of_node_put(parent);
- of_node_put(np); /* Must decrement the refcount */
return 0;
}
generated by cgit v1.2.3 (git 2.0.4) at 2024-06-07 18:36:27 +0000