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This patch updates x2apic initializaition code to allow x2apic on VMware platform even without interrupt remapping support. The hypervisor_x2apic_available hook was added in x2apic initialization code and used by KVM and XEN, before this. I have also cleaned up that code to export this hook through the hypervisor_x86 structure. Compile tested for KVM and XEN configs, this patch doesn't have any functional effect on those two platforms. On VMware platform, verified that x2apic is used in physical mode on products that support this. Signed-off-by: Alok N Kataria <akataria@vmware.com> Reviewed-by: Doug Covelli <dcovelli@vmware.com> Reviewed-by: Dan Hecht <dhecht@vmware.com> Acked-by: H. Peter Anvin <hpa@zytor.com> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Jeremy Fitzhardinge <jeremy@goop.org> Cc: Avi Kivity <avi@redhat.com> Link: http://lkml.kernel.org/r/1358466282.423.60.camel@akataria-dtop.eng.vmware.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
59 lines
1.7 KiB
C
59 lines
1.7 KiB
C
/*
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* Copyright (C) 2008, VMware, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
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* NON INFRINGEMENT. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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*/
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#ifndef _ASM_X86_HYPERVISOR_H
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#define _ASM_X86_HYPERVISOR_H
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#include <asm/kvm_para.h>
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#include <asm/xen/hypervisor.h>
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extern void init_hypervisor(struct cpuinfo_x86 *c);
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extern void init_hypervisor_platform(void);
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extern bool hypervisor_x2apic_available(void);
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/*
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* x86 hypervisor information
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*/
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struct hypervisor_x86 {
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/* Hypervisor name */
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const char *name;
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/* Detection routine */
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bool (*detect)(void);
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/* Adjust CPU feature bits (run once per CPU) */
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void (*set_cpu_features)(struct cpuinfo_x86 *);
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/* Platform setup (run once per boot) */
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void (*init_platform)(void);
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/* X2APIC detection (run once per boot) */
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bool (*x2apic_available)(void);
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};
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extern const struct hypervisor_x86 *x86_hyper;
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/* Recognized hypervisors */
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extern const struct hypervisor_x86 x86_hyper_vmware;
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extern const struct hypervisor_x86 x86_hyper_ms_hyperv;
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extern const struct hypervisor_x86 x86_hyper_xen_hvm;
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extern const struct hypervisor_x86 x86_hyper_kvm;
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#endif
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