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Cyrill Gorcunov
503483d203
Since we rely on in-kernel kvm-apic implementation it's fine to set apic version as xAPIC which allows kernel to run in bigsmp mode. Without it the kernel will not support more than 8 cpus, complaining as | [ 0.362000] Initializing CPU#8 | [ 0.363000] ------------[ cut here ]------------ | [ 0.363000] WARNING: at arch/x86/kernel/apic/apic.c:1238 setup_local_APIC+0xeb/0x2e1() | [ 0.364000] Modules linked in: | [ 0.364000] Pid: 0, comm: kworker/0:1 Not tainted 3.0.0+ #70 | [ 0.364000] Call Trace: | [ 0.364000] [<c1060c7e>] warn_slowpath_common+0x63/0x78 | [ 0.365000] [<c16612a8>] ? setup_local_APIC+0xeb/0x2e1 | [ 0.365000] [<c1060ca2>] warn_slowpath_null+0xf/0x13 | [ 0.365000] [<c16612a8>] setup_local_APIC+0xeb/0x2e1 | [ 0.366000] [<c165c684>] ? fpu_init+0x6b/0x88 | [ 0.366000] [<c1047fd7>] ? default_get_apic_id+0x17/0x32 | [ 0.366000] [<c16607d3>] start_secondary+0xab/0x18e | [ 0.367000] ---[ end trace 4eaa2a86a8e2da22 ]--- Note the kernel needs "apic=bigsmp" parameter passed to enable physical destination mode. Reported-by: Asias He <asias.hejun@gmail.com> Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com> Signed-off-by: Pekka Enberg <penberg@kernel.org>
18 lines
414 B
C
18 lines
414 B
C
#ifndef KVM_APIC_H_
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#define KVM_APIC_H_
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#include <asm/apicdef.h>
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/*
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* APIC, IOAPIC stuff
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*/
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#define APIC_BASE_ADDR_STEP 0x00400000
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#define IOAPIC_BASE_ADDR_STEP 0x00100000
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#define APIC_ADDR(apic) (APIC_DEFAULT_PHYS_BASE + apic * APIC_BASE_ADDR_STEP)
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#define IOAPIC_ADDR(ioapic) (IO_APIC_DEFAULT_PHYS_BASE + ioapic * IOAPIC_BASE_ADDR_STEP)
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#define KVM_APIC_VERSION 0x14 /* xAPIC */
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#endif /* KVM_APIC_H_ */
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