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-rw-r--r--arch/powerpc/kernel/align.c20
-rw-r--r--arch/powerpc/kernel/cputable.c6
-rw-r--r--arch/powerpc/kernel/irq.c121
-rw-r--r--arch/powerpc/kernel/pci_32.c19
-rw-r--r--arch/powerpc/kernel/pci_64.c10
-rw-r--r--arch/powerpc/kernel/pci_dn.c28
-rw-r--r--arch/powerpc/kernel/rtas_pci.c10
-rw-r--r--arch/powerpc/kernel/time.c21
-rw-r--r--arch/powerpc/kernel/traps.c96
9 files changed, 199 insertions, 132 deletions
diff --git a/arch/powerpc/kernel/align.c b/arch/powerpc/kernel/align.c
index 5ffcfaa77d6..a5b632e52fa 100644
--- a/arch/powerpc/kernel/align.c
+++ b/arch/powerpc/kernel/align.c
@@ -24,6 +24,7 @@
#include <asm/system.h>
#include <asm/cache.h>
#include <asm/cputable.h>
+#include <asm/emulated_ops.h>
struct aligninfo {
unsigned char len;
@@ -730,8 +731,10 @@ int fix_alignment(struct pt_regs *regs)
areg = dsisr & 0x1f; /* register to update */
#ifdef CONFIG_SPE
- if ((instr >> 26) == 0x4)
+ if ((instr >> 26) == 0x4) {
+ PPC_WARN_EMULATED(spe);
return emulate_spe(regs, reg, instr);
+ }
#endif
instr = (dsisr >> 10) & 0x7f;
@@ -783,23 +786,28 @@ int fix_alignment(struct pt_regs *regs)
flags |= SPLT;
nb = 8;
}
+ PPC_WARN_EMULATED(vsx);
return emulate_vsx(addr, reg, areg, regs, flags, nb);
}
#endif
/* A size of 0 indicates an instruction we don't support, with
* the exception of DCBZ which is handled as a special case here
*/
- if (instr == DCBZ)
+ if (instr == DCBZ) {
+ PPC_WARN_EMULATED(dcbz);
return emulate_dcbz(regs, addr);
+ }
if (unlikely(nb == 0))
return 0;
/* Load/Store Multiple instructions are handled in their own
* function
*/
- if (flags & M)
+ if (flags & M) {
+ PPC_WARN_EMULATED(multiple);
return emulate_multiple(regs, addr, reg, nb,
flags, instr, swiz);
+ }
/* Verify the address of the operand */
if (unlikely(user_mode(regs) &&
@@ -816,8 +824,12 @@ int fix_alignment(struct pt_regs *regs)
}
/* Special case for 16-byte FP loads and stores */
- if (nb == 16)
+ if (nb == 16) {
+ PPC_WARN_EMULATED(fp_pair);
return emulate_fp_pair(addr, reg, flags);
+ }
+
+ PPC_WARN_EMULATED(unaligned);
/* If we are loading, get the data from user space, else
* get it from register values
diff --git a/arch/powerpc/kernel/cputable.c b/arch/powerpc/kernel/cputable.c
index 3e33fb933d9..4a24a2fc457 100644
--- a/arch/powerpc/kernel/cputable.c
+++ b/arch/powerpc/kernel/cputable.c
@@ -427,7 +427,8 @@ static struct cpu_spec __initdata cpu_specs[] = {
.cpu_name = "POWER7 (architected)",
.cpu_features = CPU_FTRS_POWER7,
.cpu_user_features = COMMON_USER_POWER7,
- .mmu_features = MMU_FTR_HPTE_TABLE,
+ .mmu_features = MMU_FTR_HPTE_TABLE |
+ MMU_FTR_TLBIE_206,
.icache_bsize = 128,
.dcache_bsize = 128,
.machine_check = machine_check_generic,
@@ -441,7 +442,8 @@ static struct cpu_spec __initdata cpu_specs[] = {
.cpu_name = "POWER7 (raw)",
.cpu_features = CPU_FTRS_POWER7,
.cpu_user_features = COMMON_USER_POWER7,
- .mmu_features = MMU_FTR_HPTE_TABLE,
+ .mmu_features = MMU_FTR_HPTE_TABLE |
+ MMU_FTR_TLBIE_206,
.icache_bsize = 128,
.dcache_bsize = 128,
.num_pmcs = 6,
diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index 8c1a4966867..7d46e5d5b20 100644
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c
@@ -248,77 +248,84 @@ void fixup_irqs(cpumask_t map)
}
#endif
-void do_IRQ(struct pt_regs *regs)
-{
- struct pt_regs *old_regs = set_irq_regs(regs);
- unsigned int irq;
#ifdef CONFIG_IRQSTACKS
+static inline void handle_one_irq(unsigned int irq)
+{
struct thread_info *curtp, *irqtp;
-#endif
+ unsigned long saved_sp_limit;
+ struct irq_desc *desc;
- irq_enter();
+ /* Switch to the irq stack to handle this */
+ curtp = current_thread_info();
+ irqtp = hardirq_ctx[smp_processor_id()];
+
+ if (curtp == irqtp) {
+ /* We're already on the irq stack, just handle it */
+ generic_handle_irq(irq);
+ return;
+ }
+
+ desc = irq_desc + irq;
+ saved_sp_limit = current->thread.ksp_limit;
+
+ irqtp->task = curtp->task;
+ irqtp->flags = 0;
+
+ /* Copy the softirq bits in preempt_count so that the
+ * softirq checks work in the hardirq context. */
+ irqtp->preempt_count = (irqtp->preempt_count & ~SOFTIRQ_MASK) |
+ (curtp->preempt_count & SOFTIRQ_MASK);
+
+ current->thread.ksp_limit = (unsigned long)irqtp +
+ _ALIGN_UP(sizeof(struct thread_info), 16);
+
+ call_handle_irq(irq, desc, irqtp, desc->handle_irq);
+ current->thread.ksp_limit = saved_sp_limit;
+ irqtp->task = NULL;
+
+ /* Set any flag that may have been set on the
+ * alternate stack
+ */
+ if (irqtp->flags)
+ set_bits(irqtp->flags, &curtp->flags);
+}
+#else
+static inline void handle_one_irq(unsigned int irq)
+{
+ generic_handle_irq(irq);
+}
+#endif
+static inline void check_stack_overflow(void)
+{
#ifdef CONFIG_DEBUG_STACKOVERFLOW
- /* Debugging check for stack overflow: is there less than 2KB free? */
- {
- long sp;
+ long sp;
- sp = __get_SP() & (THREAD_SIZE-1);
+ sp = __get_SP() & (THREAD_SIZE-1);
- if (unlikely(sp < (sizeof(struct thread_info) + 2048))) {
- printk("do_IRQ: stack overflow: %ld\n",
- sp - sizeof(struct thread_info));
- dump_stack();
- }
+ /* check for stack overflow: is there less than 2KB free? */
+ if (unlikely(sp < (sizeof(struct thread_info) + 2048))) {
+ printk("do_IRQ: stack overflow: %ld\n",
+ sp - sizeof(struct thread_info));
+ dump_stack();
}
#endif
+}
- /*
- * Every platform is required to implement ppc_md.get_irq.
- * This function will either return an irq number or NO_IRQ to
- * indicate there are no more pending.
- * The value NO_IRQ_IGNORE is for buggy hardware and means that this
- * IRQ has already been handled. -- Tom
- */
- irq = ppc_md.get_irq();
+void do_IRQ(struct pt_regs *regs)
+{
+ struct pt_regs *old_regs = set_irq_regs(regs);
+ unsigned int irq;
- if (irq != NO_IRQ && irq != NO_IRQ_IGNORE) {
-#ifdef CONFIG_IRQSTACKS
- /* Switch to the irq stack to handle this */
- curtp = current_thread_info();
- irqtp = hardirq_ctx[smp_processor_id()];
- if (curtp != irqtp) {
- struct irq_desc *desc = irq_desc + irq;
- void *handler = desc->handle_irq;
- unsigned long saved_sp_limit = current->thread.ksp_limit;
- if (handler == NULL)
- handler = &__do_IRQ;
- irqtp->task = curtp->task;
- irqtp->flags = 0;
-
- /* Copy the softirq bits in preempt_count so that the
- * softirq checks work in the hardirq context.
- */
- irqtp->preempt_count =
- (irqtp->preempt_count & ~SOFTIRQ_MASK) |
- (curtp->preempt_count & SOFTIRQ_MASK);
+ irq_enter();
- current->thread.ksp_limit = (unsigned long)irqtp +
- _ALIGN_UP(sizeof(struct thread_info), 16);
- call_handle_irq(irq, desc, irqtp, handler);
- current->thread.ksp_limit = saved_sp_limit;
- irqtp->task = NULL;
+ check_stack_overflow();
+ irq = ppc_md.get_irq();
- /* Set any flag that may have been set on the
- * alternate stack
- */
- if (irqtp->flags)
- set_bits(irqtp->flags, &curtp->flags);
- } else
-#endif
- generic_handle_irq(irq);
- } else if (irq != NO_IRQ_IGNORE)
+ if (irq != NO_IRQ && irq != NO_IRQ_IGNORE)
+ handle_one_irq(irq);
+ else if (irq != NO_IRQ_IGNORE)
/* That's not SMP safe ... but who cares ? */
ppc_spurious_interrupts++;
diff --git a/arch/powerpc/kernel/pci_32.c b/arch/powerpc/kernel/pci_32.c
index d473634e39e..3ae1c666ff9 100644
--- a/arch/powerpc/kernel/pci_32.c
+++ b/arch/powerpc/kernel/pci_32.c
@@ -33,7 +33,6 @@ int pcibios_assign_bus_offset = 1;
void pcibios_make_OF_bus_map(void);
-static void fixup_broken_pcnet32(struct pci_dev* dev);
static void fixup_cpc710_pci64(struct pci_dev* dev);
#ifdef CONFIG_PPC_OF
static u8* pci_to_OF_bus_map;
@@ -72,16 +71,6 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MOTOROLA, PCI_ANY_ID, fixup_hide_host_res
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_FREESCALE, PCI_ANY_ID, fixup_hide_host_resource_fsl);
static void
-fixup_broken_pcnet32(struct pci_dev* dev)
-{
- if ((dev->class>>8 == PCI_CLASS_NETWORK_ETHERNET)) {
- dev->vendor = PCI_VENDOR_ID_AMD;
- pci_write_config_word(dev, PCI_VENDOR_ID, PCI_VENDOR_ID_AMD);
- }
-}
-DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TRIDENT, PCI_ANY_ID, fixup_broken_pcnet32);
-
-static void
fixup_cpc710_pci64(struct pci_dev* dev)
{
/* Hide the PCI64 BARs from the kernel as their content doesn't
@@ -447,14 +436,6 @@ static int __init pcibios_init(void)
subsys_initcall(pcibios_init);
-/* the next one is stolen from the alpha port... */
-void __init
-pcibios_update_irq(struct pci_dev *dev, int irq)
-{
- pci_write_config_byte(dev, PCI_INTERRUPT_LINE, irq);
- /* XXX FIXME - update OF device tree node interrupt property */
-}
-
static struct pci_controller*
pci_bus_to_hose(int bus)
{
diff --git a/arch/powerpc/kernel/pci_64.c b/arch/powerpc/kernel/pci_64.c
index 96edb6f8bab..dd6c7a3bf72 100644
--- a/arch/powerpc/kernel/pci_64.c
+++ b/arch/powerpc/kernel/pci_64.c
@@ -43,16 +43,6 @@ unsigned long pci_probe_only = 1;
unsigned long pci_io_base = ISA_IO_BASE;
EXPORT_SYMBOL(pci_io_base);
-static void fixup_broken_pcnet32(struct pci_dev* dev)
-{
- if ((dev->class>>8 == PCI_CLASS_NETWORK_ETHERNET)) {
- dev->vendor = PCI_VENDOR_ID_AMD;
- pci_write_config_word(dev, PCI_VENDOR_ID, PCI_VENDOR_ID_AMD);
- }
-}
-DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TRIDENT, PCI_ANY_ID, fixup_broken_pcnet32);
-
-
static u32 get_int_prop(struct device_node *np, const char *name, u32 def)
{
const u32 *prop;
diff --git a/arch/powerpc/kernel/pci_dn.c b/arch/powerpc/kernel/pci_dn.c
index 1c67de52e3c..d5e36e5dc7c 100644
--- a/arch/powerpc/kernel/pci_dn.c
+++ b/arch/powerpc/kernel/pci_dn.c
@@ -27,7 +27,6 @@
#include <asm/io.h>
#include <asm/prom.h>
#include <asm/pci-bridge.h>
-#include <asm/pSeries_reconfig.h>
#include <asm/ppc-pci.h>
#include <asm/firmware.h>
@@ -35,7 +34,7 @@
* Traverse_func that inits the PCI fields of the device node.
* NOTE: this *must* be done before read/write config to the device.
*/
-static void * __devinit update_dn_pci_info(struct device_node *dn, void *data)
+void * __devinit update_dn_pci_info(struct device_node *dn, void *data)
{
struct pci_controller *phb = data;
const int *type =
@@ -184,29 +183,6 @@ struct device_node *fetch_dev_dn(struct pci_dev *dev)
}
EXPORT_SYMBOL(fetch_dev_dn);
-static int pci_dn_reconfig_notifier(struct notifier_block *nb, unsigned long action, void *node)
-{
- struct device_node *np = node;
- struct pci_dn *pci = NULL;
- int err = NOTIFY_OK;
-
- switch (action) {
- case PSERIES_RECONFIG_ADD:
- pci = np->parent->data;
- if (pci)
- update_dn_pci_info(np, pci->phb);
- break;
- default:
- err = NOTIFY_DONE;
- break;
- }
- return err;
-}
-
-static struct notifier_block pci_dn_reconfig_nb = {
- .notifier_call = pci_dn_reconfig_notifier,
-};
-
/**
* pci_devs_phb_init - Initialize phbs and pci devs under them.
*
@@ -223,6 +199,4 @@ void __init pci_devs_phb_init(void)
/* This must be done first so the device nodes have valid pci info! */
list_for_each_entry_safe(phb, tmp, &hose_list, list_node)
pci_devs_phb_init_dynamic(phb);
-
- pSeries_reconfig_notifier_register(&pci_dn_reconfig_nb);
}
diff --git a/arch/powerpc/kernel/rtas_pci.c b/arch/powerpc/kernel/rtas_pci.c
index 8869001ab5d..54e66da8f74 100644
--- a/arch/powerpc/kernel/rtas_pci.c
+++ b/arch/powerpc/kernel/rtas_pci.c
@@ -93,10 +93,7 @@ static int rtas_pci_read_config(struct pci_bus *bus,
{
struct device_node *busdn, *dn;
- if (bus->self)
- busdn = pci_device_to_OF_node(bus->self);
- else
- busdn = bus->sysdata; /* must be a phb */
+ busdn = pci_bus_to_OF_node(bus);
/* Search only direct children of the bus */
for (dn = busdn->child; dn; dn = dn->sibling) {
@@ -140,10 +137,7 @@ static int rtas_pci_write_config(struct pci_bus *bus,
{
struct device_node *busdn, *dn;
- if (bus->self)
- busdn = pci_device_to_OF_node(bus->self);
- else
- busdn = bus->sysdata; /* must be a phb */
+ busdn = pci_bus_to_OF_node(bus);
/* Search only direct children of the bus */
for (dn = busdn->child; dn; dn = dn->sibling) {
diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c
index 48571ac56fb..bee1443da76 100644
--- a/arch/powerpc/kernel/time.c
+++ b/arch/powerpc/kernel/time.c
@@ -109,7 +109,7 @@ static void decrementer_set_mode(enum clock_event_mode mode,
static struct clock_event_device decrementer_clockevent = {
.name = "decrementer",
.rating = 200,
- .shift = 16,
+ .shift = 0, /* To be filled in */
.mult = 0, /* To be filled in */
.irq = 0,
.set_next_event = decrementer_set_next_event,
@@ -843,6 +843,22 @@ static void decrementer_set_mode(enum clock_event_mode mode,
decrementer_set_next_event(DECREMENTER_MAX, dev);
}
+static void __init setup_clockevent_multiplier(unsigned long hz)
+{
+ u64 mult, shift = 32;
+
+ while (1) {
+ mult = div_sc(hz, NSEC_PER_SEC, shift);
+ if (mult && (mult >> 32UL) == 0UL)
+ break;
+
+ shift--;
+ }
+
+ decrementer_clockevent.shift = shift;
+ decrementer_clockevent.mult = mult;
+}
+
static void register_decrementer_clockevent(int cpu)
{
struct clock_event_device *dec = &per_cpu(decrementers, cpu).event;
@@ -860,8 +876,7 @@ static void __init init_decrementer_clockevent(void)
{
int cpu = smp_processor_id();
- decrementer_clockevent.mult = div_sc(ppc_tb_freq, NSEC_PER_SEC,
- decrementer_clockevent.shift);
+ setup_clockevent_multiplier(ppc_tb_freq);
decrementer_clockevent.max_delta_ns =
clockevent_delta2ns(DECREMENTER_MAX, &decrementer_clockevent);
decrementer_clockevent.min_delta_ns =
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index 678fbff0d20..6a5b2b731f4 100644
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -33,7 +33,9 @@
#include <linux/backlight.h>
#include <linux/bug.h>
#include <linux/kdebug.h>
+#include <linux/debugfs.h>
+#include <asm/emulated_ops.h>
#include <asm/pgtable.h>
#include <asm/uaccess.h>
#include <asm/system.h>
@@ -757,36 +759,44 @@ static int emulate_instruction(struct pt_regs *regs)
/* Emulate the mfspr rD, PVR. */
if ((instword & PPC_INST_MFSPR_PVR_MASK) == PPC_INST_MFSPR_PVR) {
+ PPC_WARN_EMULATED(mfpvr);
rd = (instword >> 21) & 0x1f;
regs->gpr[rd] = mfspr(SPRN_PVR);
return 0;
}
/* Emulating the dcba insn is just a no-op. */
- if ((instword & PPC_INST_DCBA_MASK) == PPC_INST_DCBA)
+ if ((instword & PPC_INST_DCBA_MASK) == PPC_INST_DCBA) {
+ PPC_WARN_EMULATED(dcba);
return 0;
+ }
/* Emulate the mcrxr insn. */
if ((instword & PPC_INST_MCRXR_MASK) == PPC_INST_MCRXR) {
int shift = (instword >> 21) & 0x1c;
unsigned long msk = 0xf0000000UL >> shift;
+ PPC_WARN_EMULATED(mcrxr);
regs->ccr = (regs->ccr & ~msk) | ((regs->xer >> shift) & msk);
regs->xer &= ~0xf0000000UL;
return 0;
}
/* Emulate load/store string insn. */
- if ((instword & PPC_INST_STRING_GEN_MASK) == PPC_INST_STRING)
+ if ((instword & PPC_INST_STRING_GEN_MASK) == PPC_INST_STRING) {
+ PPC_WARN_EMULATED(string);
return emulate_string_inst(regs, instword);
+ }
/* Emulate the popcntb (Population Count Bytes) instruction. */
if ((instword & PPC_INST_POPCNTB_MASK) == PPC_INST_POPCNTB) {
+ PPC_WARN_EMULATED(popcntb);
return emulate_popcntb_inst(regs, instword);
}
/* Emulate isel (Integer Select) instruction */
if ((instword & PPC_INST_ISEL_MASK) == PPC_INST_ISEL) {
+ PPC_WARN_EMULATED(isel);
return emulate_isel(regs, instword);
}
@@ -984,6 +994,8 @@ void SoftwareEmulation(struct pt_regs *regs)
#ifdef CONFIG_MATH_EMULATION
errcode = do_mathemu(regs);
+ if (errcode >= 0)
+ PPC_WARN_EMULATED(math);
switch (errcode) {
case 0:
@@ -1005,6 +1017,9 @@ void SoftwareEmulation(struct pt_regs *regs)
#elif defined(CONFIG_8XX_MINIMAL_FPEMU)
errcode = Soft_emulate_8xx(regs);
+ if (errcode >= 0)
+ PPC_WARN_EMULATED(8xx);
+
switch (errcode) {
case 0:
emulate_single_step(regs);
@@ -1088,6 +1103,7 @@ void altivec_assist_exception(struct pt_regs *regs)
flush_altivec_to_thread(current);
+ PPC_WARN_EMULATED(altivec);
err = emulate_altivec(regs);
if (err == 0) {
regs->nip += 4; /* skip emulated instruction */
@@ -1286,3 +1302,79 @@ void kernel_bad_stack(struct pt_regs *regs)
void __init trap_init(void)
{
}
+
+
+#ifdef CONFIG_PPC_EMULATED_STATS
+
+#define WARN_EMULATED_SETUP(type) .type = { .name = #type }
+
+struct ppc_emulated ppc_emulated = {
+#ifdef CONFIG_ALTIVEC
+ WARN_EMULATED_SETUP(altivec),
+#endif
+ WARN_EMULATED_SETUP(dcba),
+ WARN_EMULATED_SETUP(dcbz),
+ WARN_EMULATED_SETUP(fp_pair),
+ WARN_EMULATED_SETUP(isel),
+ WARN_EMULATED_SETUP(mcrxr),
+ WARN_EMULATED_SETUP(mfpvr),
+ WARN_EMULATED_SETUP(multiple),
+ WARN_EMULATED_SETUP(popcntb),
+ WARN_EMULATED_SETUP(spe),
+ WARN_EMULATED_SETUP(string),
+ WARN_EMULATED_SETUP(unaligned),
+#ifdef CONFIG_MATH_EMULATION
+ WARN_EMULATED_SETUP(math),
+#elif defined(CONFIG_8XX_MINIMAL_FPEMU)
+ WARN_EMULATED_SETUP(8xx),
+#endif
+#ifdef CONFIG_VSX
+ WARN_EMULATED_SETUP(vsx),
+#endif
+};
+
+u32 ppc_warn_emulated;
+
+void ppc_warn_emulated_print(const char *type)
+{
+ if (printk_ratelimit())
+ pr_warning("%s used emulated %s instruction\n", current->comm,
+ type);
+}
+
+static int __init ppc_warn_emulated_init(void)
+{
+ struct dentry *dir, *d;
+ unsigned int i;
+ struct ppc_emulated_entry *entries = (void *)&ppc_emulated;
+
+ if (!powerpc_debugfs_root)
+ return -ENODEV;
+
+ dir = debugfs_create_dir("emulated_instructions",
+ powerpc_debugfs_root);
+ if (!dir)
+ return -ENOMEM;
+
+ d = debugfs_create_u32("do_warn", S_IRUGO | S_IWUSR, dir,
+ &ppc_warn_emulated);
+ if (!d)
+ goto fail;
+
+ for (i = 0; i < sizeof(ppc_emulated)/sizeof(*entries); i++) {
+ d = debugfs_create_u32(entries[i].name, S_IRUGO | S_IWUSR, dir,
+ (u32 *)&entries[i].val.counter);
+ if (!d)
+ goto fail;
+ }
+
+ return 0;
+
+fail:
+ debugfs_remove_recursive(dir);
+ return -ENOMEM;
+}
+
+device_initcall(ppc_warn_emulated_init);
+
+#endif /* CONFIG_PPC_EMULATED_STATS */
generated by cgit v1.2.3 (git 2.25.1) at 2025-02-06 01:33:48 +0000