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authorAndi Kleen <ak@suse.de>2006-04-07 19:49:45 +0200
committerLinus Torvalds <torvalds@g5.osdl.org>2006-04-09 11:53:51 -0700
commit95d769aaf47abfc77b600631403ff5af6c990cff (patch)
tree738fff854613a086e7c1ad04074fa596b8554760 /include/asm-i386/apic.h
parentd1530d82e02fd96d4634a6d6f6538c8b778c43af (diff)
downloadop-kernel-dev-95d769aaf47abfc77b600631403ff5af6c990cff.zip
op-kernel-dev-95d769aaf47abfc77b600631403ff5af6c990cff.tar.gz
[PATCH] i386: Consolidate modern APIC handling
AMD systems have a modern APIC that supports 8 bit IDs, but don't have a XAPIC version number. Add a new "modern_apic" subfunction that handles this correctly and use it (nearly) everywhere where XAPIC is tested for. I removed one wart: the code specified that external APICs would use an 8bit APIC ID. But I checked a real 82093 data sheet and it says clearly that they only use 4bit. So I removed this special case since it would a bit awkward to implement now. I removed the valid APIC tests in mptable parsing completely. On any modern system they only check against the full field width (8bit) anyways and are no-ops. This also fixes them doing the wrong thing on >8 core Opterons. This makes i386 boot again on 16 core Opterons. Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-i386/apic.h')
-rw-r--r--include/asm-i386/apic.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/asm-i386/apic.h b/include/asm-i386/apic.h
index ff9ac8d..288233f 100644
--- a/include/asm-i386/apic.h
+++ b/include/asm-i386/apic.h
@@ -139,6 +139,8 @@ void switch_ipi_to_APIC_timer(void *cpumask);
extern int timer_over_8254;
+extern int modern_apic(void);
+
#else /* !CONFIG_X86_LOCAL_APIC */
static inline void lapic_shutdown(void) { }
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