diff options
| author | Andi Kleen <ak@suse.de> | 2005-01-11 01:50:38 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-01-11 01:50:38 -0800 |
| commit | c2cc6280f832dee7efff479a7938a8086d420522 (patch) | |
| tree | 23330047fa855c48f48275b767a12e513267e635 /arch | |
| parent | f9e78f69a9e7649b668545aa4ee91559e01e571a (diff) | |
| download | history-c2cc6280f832dee7efff479a7938a8086d420522.tar.gz | |
[PATCH] x86_64: Don't sync APIC ARBs on P4s.
Merged from i386
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86_64/kernel/apic.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/x86_64/kernel/apic.c b/arch/x86_64/kernel/apic.c index cd37a0aa66f3e5..dbccec4894c0b1 100644 --- a/arch/x86_64/kernel/apic.c +++ b/arch/x86_64/kernel/apic.c @@ -225,6 +225,11 @@ int __init verify_local_APIC(void) void __init sync_Arb_IDs(void) { + /* Unsupported on P4 - see Intel Dev. Manual Vol. 3, Ch. 8.6.1 */ + unsigned int ver = GET_APIC_VERSION(apic_read(APIC_LVR)); + if (ver >= 0x14) /* P4 or higher */ + return; + /* * Wait for idle. */ |