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x86/cacheinfo: Remove the P4 trace leftovers for real

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Commit 851026a2bf ("x86/cacheinfo: Remove unused trace variable") removed
the switch case for LVL_TRACE but did not get rid of the surrounding gunk.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ahmed S. Darwish <darwi@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20250304085152.51092-12-darwi@linutronix.de
This commit is contained in:
Thomas Gleixner 2025-03-04 09:51:22 +01:00 committed by Ingo Molnar
parent 1f61dfdf16
commit b3a756bd72
1 changed files with 3 additions and 16 deletions
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19
arch/x86/kernel/cpu/cacheinfo.c
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@ -31,7 +31,6 @@
#define LVL_1_DATA 2
#define LVL_2 3
#define LVL_3 4
#define LVL_TRACE 5
/* Shared last level cache maps */
DEFINE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_llc_shared_map);
@ -96,10 +95,6 @@ static const struct _cache_table cache_table[] =
{ 0x66, LVL_1_DATA, 8 }, /* 4-way set assoc, sectored cache, 64 byte line size */
{ 0x67, LVL_1_DATA, 16 }, /* 4-way set assoc, sectored cache, 64 byte line size */
{ 0x68, LVL_1_DATA, 32 }, /* 4-way set assoc, sectored cache, 64 byte line size */
{ 0x70, LVL_TRACE, 12 }, /* 8-way set assoc */
{ 0x71, LVL_TRACE, 16 }, /* 8-way set assoc */
{ 0x72, LVL_TRACE, 32 }, /* 8-way set assoc */
{ 0x73, LVL_TRACE, 64 }, /* 8-way set assoc */
{ 0x78, LVL_2, MB(1) }, /* 4-way set assoc, 64 byte line size */
{ 0x79, LVL_2, 128 }, /* 8-way set assoc, sectored cache, 64 byte line size */
{ 0x7a, LVL_2, 256 }, /* 8-way set assoc, sectored cache, 64 byte line size */
@ -787,19 +782,13 @@ void init_intel_cacheinfo(struct cpuinfo_x86 *c)
}
}
}
/*
* Don't use cpuid2 if cpuid4 is supported. For P4, we use cpuid2 for
* trace cache
*/
if ((!ci->num_leaves || c->x86 == 15) && c->cpuid_level > 1) {
/* Don't use CPUID(2) if CPUID(4) is supported. */
if (!ci->num_leaves && c->cpuid_level > 1) {
/* supports eax=2 call */
int j, n;
unsigned int regs[4];
unsigned char *dp = (unsigned char *)regs;
int only_trace = 0;
if (ci->num_leaves && c->x86 == 15)
only_trace = 1;
/* Number of times to iterate */
n = cpuid_eax(2) & 0xFF;
@ -820,8 +809,6 @@ void init_intel_cacheinfo(struct cpuinfo_x86 *c)
/* look up this descriptor in the table */
while (cache_table[k].descriptor != 0) {
if (cache_table[k].descriptor == des) {
if (only_trace && cache_table[k].cache_type != LVL_TRACE)
break;
switch (cache_table[k].cache_type) {
case LVL_1_INST:
l1i += cache_table[k].size;