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authorTejun Heo <tj@kernel.org>2011-01-23 14:37:33 +0100
committerIngo Molnar <mingo@elte.hu>2011-01-28 14:54:06 +0100
commitacb8bc09c6185e4d3d582d0076aaa6a89f19d8c5 (patch)
tree72dbecce548a362c665a0c4c9fab428aaa854ecc /arch/x86/kernel/apic/probe_32.c
parent7632611f534340182c832d2b139cb19676f24e1a (diff)
downloadtalos-op-linux-acb8bc09c6185e4d3d582d0076aaa6a89f19d8c5.tar.gz
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x86: Add apic->x86_32_early_logical_apicid()
On x86_32, the mapping between cpu and logical apic ID differs depending on the specific apic implementation in use. The mapping is initialized while bringing up CPUs; however, this makes early inits ignore memory topology. Add a x86_32 specific apic->x86_32_early_logical_apicid() which is called early during boot to query the mapping. The mapping is later verified against the result of init_apic_ldr(). The method is allowed to return BAD_APICID if it can't be determined early. noop variant which always returns BAD_APICID is implemented and added to all x86_32 apic implementations. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: eric.dumazet@gmail.com Cc: yinghai@kernel.org Cc: brgerst@gmail.com Cc: gorcunov@gmail.com Cc: penberg@kernel.org Cc: shaohui.zheng@intel.com Cc: rientjes@google.com LKML-Reference: <1295789862-25482-8-git-send-email-tj@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/apic/probe_32.c')
-rw-r--r--arch/x86/kernel/apic/probe_32.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/kernel/apic/probe_32.c b/arch/x86/kernel/apic/probe_32.c
index 24a68281101b..40be7c3cdfeb 100644
--- a/arch/x86/kernel/apic/probe_32.c
+++ b/arch/x86/kernel/apic/probe_32.c
@@ -166,6 +166,8 @@ struct apic apic_default = {
.icr_write = native_apic_icr_write,
.wait_icr_idle = native_apic_wait_icr_idle,
.safe_wait_icr_idle = native_safe_apic_wait_icr_idle,
+
+ .x86_32_early_logical_apicid = noop_x86_32_early_logical_apicid,
};
extern struct apic apic_numaq;
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