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powerpc: Expose PMCs & cache topology in sysfs on 32-bit
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The file arch/powerpc/kernel/sysfs.c is currently only compiled for
64-bit kernels.  It contain code to register CPU sysdevs in sysfs and
add various properties such as cache topology and raw access by root
to performance monitor counters (PMCs).  A lot of that can be re-used
as is on 32-bits.

This makes the file be built for both, with appropriate ifdef'ing
for the few bits that are really 64-bit specific, and adds some
support for the raw PMCs for 75x and 74xx processors.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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Benjamin Herrenschmidt authored and Paul Mackerras committed Aug 20, 2008
1 parent 41eba0a commit b950bdd
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Showing 6 changed files with 117 additions and 33 deletions.
1 change: 1 addition & 0 deletions arch/powerpc/include/asm/cputable.h
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Original file line number Diff line number Diff line change
Expand Up @@ -62,6 +62,7 @@ enum powerpc_pmc_type {
PPC_PMC_DEFAULT = 0,
PPC_PMC_IBM = 1,
PPC_PMC_PA6T = 2,
PPC_PMC_G4 = 3,
};

struct pt_regs;
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4 changes: 2 additions & 2 deletions arch/powerpc/kernel/Makefile
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Original file line number Diff line number Diff line change
Expand Up @@ -27,13 +27,13 @@ endif
obj-y := cputable.o ptrace.o syscalls.o \
irq.o align.o signal_32.o pmc.o vdso.o \
init_task.o process.o systbl.o idle.o \
signal.o
signal.o sysfs.o
obj-y += vdso32/
obj-$(CONFIG_PPC64) += setup_64.o sys_ppc32.o \
signal_64.o ptrace32.o \
paca.o cpu_setup_ppc970.o \
cpu_setup_pa6t.o \
firmware.o sysfs.o nvram_64.o
firmware.o nvram_64.o
obj-$(CONFIG_PPC64) += vdso64/
obj-$(CONFIG_ALTIVEC) += vecemu.o vector.o
obj-$(CONFIG_PPC_970_NAP) += idle_power4.o
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24 changes: 24 additions & 0 deletions arch/powerpc/kernel/cputable.c
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Original file line number Diff line number Diff line change
Expand Up @@ -610,6 +610,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.icache_bsize = 32,
.dcache_bsize = 32,
.num_pmcs = 4,
.pmc_type = PPC_PMC_IBM,
.cpu_setup = __setup_cpu_750cx,
.machine_check = machine_check_generic,
.platform = "ppc750",
Expand All @@ -623,6 +624,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.icache_bsize = 32,
.dcache_bsize = 32,
.num_pmcs = 4,
.pmc_type = PPC_PMC_IBM,
.cpu_setup = __setup_cpu_750cx,
.machine_check = machine_check_generic,
.platform = "ppc750",
Expand All @@ -636,6 +638,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.icache_bsize = 32,
.dcache_bsize = 32,
.num_pmcs = 4,
.pmc_type = PPC_PMC_IBM,
.cpu_setup = __setup_cpu_750cx,
.machine_check = machine_check_generic,
.platform = "ppc750",
Expand All @@ -649,6 +652,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.icache_bsize = 32,
.dcache_bsize = 32,
.num_pmcs = 4,
.pmc_type = PPC_PMC_IBM,
.cpu_setup = __setup_cpu_750,
.machine_check = machine_check_generic,
.platform = "ppc750",
Expand All @@ -662,6 +666,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.icache_bsize = 32,
.dcache_bsize = 32,
.num_pmcs = 4,
.pmc_type = PPC_PMC_IBM,
.cpu_setup = __setup_cpu_750,
.machine_check = machine_check_generic,
.platform = "ppc750",
Expand All @@ -675,6 +680,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.icache_bsize = 32,
.dcache_bsize = 32,
.num_pmcs = 4,
.pmc_type = PPC_PMC_IBM,
.cpu_setup = __setup_cpu_750,
.machine_check = machine_check_generic,
.platform = "ppc750",
Expand All @@ -688,6 +694,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.icache_bsize = 32,
.dcache_bsize = 32,
.num_pmcs = 4,
.pmc_type = PPC_PMC_IBM,
.cpu_setup = __setup_cpu_750,
.machine_check = machine_check_generic,
.platform = "ppc750",
Expand All @@ -701,6 +708,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.icache_bsize = 32,
.dcache_bsize = 32,
.num_pmcs = 4,
.pmc_type = PPC_PMC_IBM,
.cpu_setup = __setup_cpu_750fx,
.machine_check = machine_check_generic,
.platform = "ppc750",
Expand All @@ -714,6 +722,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.icache_bsize = 32,
.dcache_bsize = 32,
.num_pmcs = 4,
.pmc_type = PPC_PMC_IBM,
.cpu_setup = __setup_cpu_750fx,
.machine_check = machine_check_generic,
.platform = "ppc750",
Expand All @@ -727,6 +736,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.icache_bsize = 32,
.dcache_bsize = 32,
.num_pmcs = 4,
.pmc_type = PPC_PMC_IBM,
.cpu_setup = __setup_cpu_750,
.machine_check = machine_check_generic,
.platform = "ppc750",
Expand All @@ -741,6 +751,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.icache_bsize = 32,
.dcache_bsize = 32,
.num_pmcs = 4,
.pmc_type = PPC_PMC_G4,
.cpu_setup = __setup_cpu_7400,
.machine_check = machine_check_generic,
.platform = "ppc7400",
Expand All @@ -755,6 +766,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.icache_bsize = 32,
.dcache_bsize = 32,
.num_pmcs = 4,
.pmc_type = PPC_PMC_G4,
.cpu_setup = __setup_cpu_7400,
.machine_check = machine_check_generic,
.platform = "ppc7400",
Expand All @@ -769,6 +781,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.icache_bsize = 32,
.dcache_bsize = 32,
.num_pmcs = 4,
.pmc_type = PPC_PMC_G4,
.cpu_setup = __setup_cpu_7410,
.machine_check = machine_check_generic,
.platform = "ppc7400",
Expand All @@ -783,6 +796,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.icache_bsize = 32,
.dcache_bsize = 32,
.num_pmcs = 6,
.pmc_type = PPC_PMC_G4,
.cpu_setup = __setup_cpu_745x,
.oprofile_cpu_type = "ppc/7450",
.oprofile_type = PPC_OPROFILE_G4,
Expand All @@ -799,6 +813,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.icache_bsize = 32,
.dcache_bsize = 32,
.num_pmcs = 6,
.pmc_type = PPC_PMC_G4,
.cpu_setup = __setup_cpu_745x,
.oprofile_cpu_type = "ppc/7450",
.oprofile_type = PPC_OPROFILE_G4,
Expand All @@ -815,6 +830,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.icache_bsize = 32,
.dcache_bsize = 32,
.num_pmcs = 6,
.pmc_type = PPC_PMC_G4,
.cpu_setup = __setup_cpu_745x,
.oprofile_cpu_type = "ppc/7450",
.oprofile_type = PPC_OPROFILE_G4,
Expand All @@ -831,6 +847,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.icache_bsize = 32,
.dcache_bsize = 32,
.num_pmcs = 6,
.pmc_type = PPC_PMC_G4,
.cpu_setup = __setup_cpu_745x,
.oprofile_cpu_type = "ppc/7450",
.oprofile_type = PPC_OPROFILE_G4,
Expand All @@ -847,6 +864,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.icache_bsize = 32,
.dcache_bsize = 32,
.num_pmcs = 6,
.pmc_type = PPC_PMC_G4,
.cpu_setup = __setup_cpu_745x,
.oprofile_cpu_type = "ppc/7450",
.oprofile_type = PPC_OPROFILE_G4,
Expand All @@ -863,6 +881,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.icache_bsize = 32,
.dcache_bsize = 32,
.num_pmcs = 6,
.pmc_type = PPC_PMC_G4,
.cpu_setup = __setup_cpu_745x,
.oprofile_cpu_type = "ppc/7450",
.oprofile_type = PPC_OPROFILE_G4,
Expand All @@ -879,6 +898,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.icache_bsize = 32,
.dcache_bsize = 32,
.num_pmcs = 6,
.pmc_type = PPC_PMC_G4,
.cpu_setup = __setup_cpu_745x,
.oprofile_cpu_type = "ppc/7450",
.oprofile_type = PPC_OPROFILE_G4,
Expand All @@ -895,6 +915,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.icache_bsize = 32,
.dcache_bsize = 32,
.num_pmcs = 6,
.pmc_type = PPC_PMC_G4,
.cpu_setup = __setup_cpu_745x,
.oprofile_cpu_type = "ppc/7450",
.oprofile_type = PPC_OPROFILE_G4,
Expand All @@ -910,6 +931,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.icache_bsize = 32,
.dcache_bsize = 32,
.num_pmcs = 6,
.pmc_type = PPC_PMC_G4,
.cpu_setup = __setup_cpu_745x,
.oprofile_cpu_type = "ppc/7450",
.oprofile_type = PPC_OPROFILE_G4,
Expand All @@ -926,6 +948,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.icache_bsize = 32,
.dcache_bsize = 32,
.num_pmcs = 6,
.pmc_type = PPC_PMC_G4,
.cpu_setup = __setup_cpu_745x,
.oprofile_cpu_type = "ppc/7450",
.oprofile_type = PPC_OPROFILE_G4,
Expand All @@ -942,6 +965,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.icache_bsize = 32,
.dcache_bsize = 32,
.num_pmcs = 6,
.pmc_type = PPC_PMC_G4,
.cpu_setup = __setup_cpu_745x,
.oprofile_cpu_type = "ppc/7450",
.oprofile_type = PPC_OPROFILE_G4,
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11 changes: 0 additions & 11 deletions arch/powerpc/kernel/setup_32.c
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Original file line number Diff line number Diff line change
Expand Up @@ -209,23 +209,12 @@ EXPORT_SYMBOL(nvram_sync);

#endif /* CONFIG_NVRAM */

static DEFINE_PER_CPU(struct cpu, cpu_devices);

int __init ppc_init(void)
{
int cpu;

/* clear the progress line */
if (ppc_md.progress)
ppc_md.progress(" ", 0xffff);

/* register CPU devices */
for_each_possible_cpu(cpu) {
struct cpu *c = &per_cpu(cpu_devices, cpu);
c->hotpluggable = 1;
register_cpu(c, cpu);
}

/* call platform init */
if (ppc_md.init != NULL) {
ppc_md.init();
Expand Down
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