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x86: move various CPU initialization objects into .cpuinit.rodata

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Impact: debuggability and micro-optimization

Putting whatever is possible into the (final) .rodata section increases
the likelihood of catching memory corruption bugs early, and reduces
false cache line sharing.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
LKML-Reference: <49B90961.76E4.0078.0@novell.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Jan Beulich
2009-03-12 12:08:49 +00:00
committed by Ingo Molnar
parent 821508d4ef
commit 02dde8b45c
12 changed files with 36 additions and 35 deletions
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8
arch/x86/kernel/cpu/intel_cacheinfo.c
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@@ -32,7 +32,7 @@ struct _cache_table
};
/* all the cache descriptor types we care about (no TLB or trace cache entries) */
static struct _cache_table cache_table[] __cpuinitdata =
static const struct _cache_table __cpuinitconst cache_table[] =
{
{ 0x06, LVL_1_INST, 8 }, /* 4-way set assoc, 32 byte line size */
{ 0x08, LVL_1_INST, 16 }, /* 4-way set assoc, 32 byte line size */
@@ -206,15 +206,15 @@ union l3_cache {
unsigned val;
};
static unsigned short assocs[] __cpuinitdata = {
static const unsigned short __cpuinitconst assocs[] = {
[1] = 1, [2] = 2, [4] = 4, [6] = 8,
[8] = 16, [0xa] = 32, [0xb] = 48,
[0xc] = 64,
[0xf] = 0xffff // ??
};
static unsigned char levels[] __cpuinitdata = { 1, 1, 2, 3 };
static unsigned char types[] __cpuinitdata = { 1, 2, 3, 3 };
static const unsigned char __cpuinitconst levels[] = { 1, 1, 2, 3 };
static const unsigned char __cpuinitconst types[] = { 1, 2, 3, 3 };
static void __cpuinit
amd_cpuid4(int leaf, union _cpuid4_leaf_eax *eax,