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-rw-r--r--arch/powerpc/include/asm/topology.h14
-rw-r--r--arch/powerpc/kernel/eeh.c10
-rw-r--r--arch/powerpc/kernel/eeh_driver.c19
-rw-r--r--arch/powerpc/kernel/exceptions-64e.S12
-rw-r--r--arch/powerpc/kernel/kprobes.c11
-rw-r--r--arch/powerpc/kernel/mce.c2
-rw-r--r--arch/powerpc/kernel/setup_64.c4
-rw-r--r--arch/powerpc/kernel/traps.c4
-rw-r--r--arch/powerpc/kvm/book3s_hv.c21
-rw-r--r--arch/powerpc/mm/slb_low.S10
-rw-r--r--arch/powerpc/mm/slice.c2
-rw-r--r--arch/powerpc/platforms/pseries/dlpar.c1
-rw-r--r--arch/powerpc/platforms/pseries/hotplug-memory.c2
13 files changed, 101 insertions, 11 deletions
diff --git a/arch/powerpc/include/asm/topology.h b/arch/powerpc/include/asm/topology.h
index 8b3b46b7b0f2..329771559cbb 100644
--- a/arch/powerpc/include/asm/topology.h
+++ b/arch/powerpc/include/asm/topology.h
@@ -44,8 +44,22 @@ 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/eeh_driver.c b/arch/powerpc/kernel/eeh_driver.c
index c314db8b798c..9837c98caabe 100644
--- a/arch/powerpc/kernel/eeh_driver.c
+++ b/arch/powerpc/kernel/eeh_driver.c
@@ -655,7 +655,7 @@ static int eeh_reset_device(struct eeh_pe *pe, struct pci_bus *bus)
*/
#define MAX_WAIT_FOR_RECOVERY 300
-static void eeh_handle_normal_event(struct eeh_pe *pe)
+static bool eeh_handle_normal_event(struct eeh_pe *pe)
{
struct pci_bus *frozen_bus;
int rc = 0;
@@ -665,7 +665,7 @@ static void eeh_handle_normal_event(struct eeh_pe *pe)
if (!frozen_bus) {
pr_err("%s: Cannot find PCI bus for PHB#%d-PE#%x\n",
__func__, pe->phb->global_number, pe->addr);
- return;
+ return false;
}
eeh_pe_update_time_stamp(pe);
@@ -790,7 +790,7 @@ static void eeh_handle_normal_event(struct eeh_pe *pe)
pr_info("EEH: Notify device driver to resume\n");
eeh_pe_dev_traverse(pe, eeh_report_resume, NULL);
- return;
+ return false;
excess_failures:
/*
@@ -831,7 +831,11 @@ perm_error:
pci_lock_rescan_remove();
pcibios_remove_pci_devices(frozen_bus);
pci_unlock_rescan_remove();
+
+ /* The passed PE should no longer be used */
+ return true;
}
+ return false;
}
static void eeh_handle_special_event(void)
@@ -897,7 +901,14 @@ static void eeh_handle_special_event(void)
*/
if (rc == EEH_NEXT_ERR_FROZEN_PE ||
rc == EEH_NEXT_ERR_FENCED_PHB) {
- eeh_handle_normal_event(pe);
+ /*
+ * eeh_handle_normal_event() can make the PE stale if it
+ * determines that the PE cannot possibly be recovered.
+ * Don't modify the PE state if that's the case.
+ */
+ if (eeh_handle_normal_event(pe))
+ continue;
+
eeh_pe_state_clear(pe, EEH_PE_RECOVERING);
} else {
pci_lock_rescan_remove();
diff --git a/arch/powerpc/kernel/exceptions-64e.S b/arch/powerpc/kernel/exceptions-64e.S
index 488e6314f993..5cc93f0b52ca 100644
--- a/arch/powerpc/kernel/exceptions-64e.S
+++ b/arch/powerpc/kernel/exceptions-64e.S
@@ -735,8 +735,14 @@ END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC)
andis. r15,r14,(DBSR_IC|DBSR_BT)@h
beq+ 1f
+#ifdef CONFIG_RELOCATABLE
+ ld r15,PACATOC(r13)
+ ld r14,interrupt_base_book3e@got(r15)
+ ld r15,__end_interrupts@got(r15)
+#else
LOAD_REG_IMMEDIATE(r14,interrupt_base_book3e)
LOAD_REG_IMMEDIATE(r15,__end_interrupts)
+#endif
cmpld cr0,r10,r14
cmpld cr1,r10,r15
blt+ cr0,1f
@@ -799,8 +805,14 @@ kernel_dbg_exc:
andis. r15,r14,(DBSR_IC|DBSR_BT)@h
beq+ 1f
+#ifdef CONFIG_RELOCATABLE
+ ld r15,PACATOC(r13)
+ ld r14,interrupt_base_book3e@got(r15)
+ ld r15,__end_interrupts@got(r15)
+#else
LOAD_REG_IMMEDIATE(r14,interrupt_base_book3e)
LOAD_REG_IMMEDIATE(r15,__end_interrupts)
+#endif
cmpld cr0,r10,r14
cmpld cr1,r10,r15
blt+ cr0,1f
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/mce.c b/arch/powerpc/kernel/mce.c
index b2eb4686bd8f..da3c4c3f4ec8 100644
--- a/arch/powerpc/kernel/mce.c
+++ b/arch/powerpc/kernel/mce.c
@@ -204,6 +204,8 @@ static void machine_check_process_queued_event(struct irq_work *work)
{
int index;
+ add_taint(TAINT_MACHINE_CHECK, LOCKDEP_NOW_UNRELIABLE);
+
/*
* For now just print it to console.
* TODO: log this error event to FSP or nvram.
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index a20823210ac0..fe6e800c1357 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(cpu_to_node(cpu)), size, align,
+ return __alloc_bootmem_node(NODE_DATA(early_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 (cpu_to_node(from) == cpu_to_node(to))
+ if (early_cpu_to_node(from) == early_cpu_to_node(to))
return LOCAL_DISTANCE;
else
return REMOTE_DISTANCE;
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index 37de90f8a845..e4dcb0a43e3f 100644
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -297,8 +297,6 @@ long machine_check_early(struct pt_regs *regs)
__this_cpu_inc(irq_stat.mce_exceptions);
- add_taint(TAINT_MACHINE_CHECK, LOCKDEP_NOW_UNRELIABLE);
-
if (cur_cpu_spec && cur_cpu_spec->machine_check_early)
handled = cur_cpu_spec->machine_check_early(regs);
return handled;
@@ -704,6 +702,8 @@ void machine_check_exception(struct pt_regs *regs)
__this_cpu_inc(irq_stat.mce_exceptions);
+ add_taint(TAINT_MACHINE_CHECK, LOCKDEP_NOW_UNRELIABLE);
+
/* See if any machine dependent calls. In theory, we would want
* to call the CPU first, and call the ppc_md. one if the CPU
* one returns a positive number. However there is existing code
diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c
index 3c3a367b6e59..396dc44e783b 100644
--- a/arch/powerpc/kvm/book3s_hv.c
+++ b/arch/powerpc/kvm/book3s_hv.c
@@ -2693,6 +2693,27 @@ static int kvmppc_vcpu_run_hv(struct kvm_run *run, struct kvm_vcpu *vcpu)
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;
+ }
+ current->thread.tm_tfhar = mfspr(SPRN_TFHAR);
+ current->thread.tm_tfiar = mfspr(SPRN_TFIAR);
+ current->thread.tm_texasr = mfspr(SPRN_TEXASR);
+ current->thread.regs->msr &= ~MSR_TM;
+ }
+#endif
+
kvmppc_core_prepare_to_enter(vcpu);
/* No need to go into the guest when all we'll do is come back out */
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/dlpar.c b/arch/powerpc/platforms/pseries/dlpar.c
index f244dcb4f2cf..96536c969c9c 100644
--- a/arch/powerpc/platforms/pseries/dlpar.c
+++ b/arch/powerpc/platforms/pseries/dlpar.c
@@ -280,7 +280,6 @@ int dlpar_detach_node(struct device_node *dn)
if (rc)
return rc;
- of_node_put(dn); /* Must decrement the refcount */
return 0;
}
diff --git a/arch/powerpc/platforms/pseries/hotplug-memory.c b/arch/powerpc/platforms/pseries/hotplug-memory.c
index e9ff44cd5d86..e8b1027e1b5b 100644
--- a/arch/powerpc/platforms/pseries/hotplug-memory.c
+++ b/arch/powerpc/platforms/pseries/hotplug-memory.c
@@ -110,6 +110,7 @@ static struct property *dlpar_clone_drconf_property(struct device_node *dn)
for (i = 0; i < num_lmbs; i++) {
lmbs[i].base_addr = be64_to_cpu(lmbs[i].base_addr);
lmbs[i].drc_index = be32_to_cpu(lmbs[i].drc_index);
+ lmbs[i].aa_index = be32_to_cpu(lmbs[i].aa_index);
lmbs[i].flags = be32_to_cpu(lmbs[i].flags);
}
@@ -553,6 +554,7 @@ static void dlpar_update_drconf_property(struct device_node *dn,
for (i = 0; i < num_lmbs; i++) {
lmbs[i].base_addr = cpu_to_be64(lmbs[i].base_addr);
lmbs[i].drc_index = cpu_to_be32(lmbs[i].drc_index);
+ lmbs[i].aa_index = cpu_to_be32(lmbs[i].aa_index);
lmbs[i].flags = cpu_to_be32(lmbs[i].flags);
}
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-23 08:03:50 +0000