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authorAnton Blanchard <anton@samba.org>2006-02-13 18:11:13 +1100
committerPaul Mackerras <paulus@samba.org>2006-02-24 11:36:33 +1100
commitf1870f772c5e884862b4dd8f1ec2147247dda0ef (patch)
tree652414b8090a4b24e03aba76ddd37d83b762b88b /arch/powerpc/kernel/prom_init.c
parentcb2c9b2741346eb23b177187a51ff5abf08295bd (diff)
downloadblackbird-op-linux-f1870f772c5e884862b4dd8f1ec2147247dda0ef.tar.gz
blackbird-op-linux-f1870f772c5e884862b4dd8f1ec2147247dda0ef.zip
[PATCH] powerpc64: remove broken/bitrotted HMT support
HMT support is currently broken and needs to be reworked to play nicely with the SMT scheduler. Remove the bit rotten bits for the time being. I also updated an incorrect comment, we enter __secondary_hold with the physical cpu id in r3. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/kernel/prom_init.c')
-rw-r--r--arch/powerpc/kernel/prom_init.c38
1 files changed, 0 insertions, 38 deletions
diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
index ec7153f4d47c..d34fe537400e 100644
--- a/arch/powerpc/kernel/prom_init.c
+++ b/arch/powerpc/kernel/prom_init.c
@@ -205,14 +205,6 @@ static cell_t __initdata regbuf[1024];
#define MAX_CPU_THREADS 2
-/* TO GO */
-#ifdef CONFIG_HMT
-struct {
- unsigned int pir;
- unsigned int threadid;
-} hmt_thread_data[NR_CPUS];
-#endif /* CONFIG_HMT */
-
/*
* Error results ... some OF calls will return "-1" on error, some
* will return 0, some will return either. To simplify, here are
@@ -1319,10 +1311,6 @@ static void __init prom_hold_cpus(void)
*/
*spinloop = 0;
-#ifdef CONFIG_HMT
- for (i = 0; i < NR_CPUS; i++)
- RELOC(hmt_thread_data)[i].pir = 0xdeadbeef;
-#endif
/* look for cpus */
for (node = 0; prom_next_node(&node); ) {
type[0] = 0;
@@ -1389,32 +1377,6 @@ static void __init prom_hold_cpus(void)
/* Reserve cpu #s for secondary threads. They start later. */
cpuid += cpu_threads;
}
-#ifdef CONFIG_HMT
- /* Only enable HMT on processors that provide support. */
- if (__is_processor(PV_PULSAR) ||
- __is_processor(PV_ICESTAR) ||
- __is_processor(PV_SSTAR)) {
- prom_printf(" starting secondary threads\n");
-
- for (i = 0; i < NR_CPUS; i += 2) {
- if (!cpu_online(i))
- continue;
-
- if (i == 0) {
- unsigned long pir = mfspr(SPRN_PIR);
- if (__is_processor(PV_PULSAR)) {
- RELOC(hmt_thread_data)[i].pir =
- pir & 0x1f;
- } else {
- RELOC(hmt_thread_data)[i].pir =
- pir & 0x3ff;
- }
- }
- }
- } else {
- prom_printf("Processor is not HMT capable\n");
- }
-#endif
if (cpuid > NR_CPUS)
prom_printf("WARNING: maximum CPUs (" __stringify(NR_CPUS)
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