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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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47ae4b05d0
Add generic virtualization support for pinning the current vCPU to a specified physical CPU. As this operation isn't performance critical (a very limited set of operations like BIOS calls and SMIs is expected to need this) just add a hypervisor specific indirection. Signed-off-by: Juergen Gross <jgross@suse.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Douglas_Warzecha@dell.com Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: akataria@vmware.com Cc: boris.ostrovsky@oracle.com Cc: chrisw@sous-sol.org Cc: david.vrabel@citrix.com Cc: hpa@zytor.com Cc: jdelvare@suse.com Cc: jeremy@goop.org Cc: linux@roeck-us.net Cc: pali.rohar@gmail.com Cc: rusty@rustcorp.com.au Cc: virtualization@lists.linux-foundation.org Cc: xen-devel@lists.xenproject.org Link: http://lkml.kernel.org/r/1472453327-19050-3-git-send-email-jgross@suse.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
69 lines
2.1 KiB
C
69 lines
2.1 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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#ifdef CONFIG_HYPERVISOR_GUEST
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#include <asm/kvm_para.h>
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#include <asm/xen/hypervisor.h>
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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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uint32_t (*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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/* pin current vcpu to specified physical cpu (run rarely) */
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void (*pin_vcpu)(int);
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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;
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extern const struct hypervisor_x86 x86_hyper_kvm;
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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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extern void hypervisor_pin_vcpu(int cpu);
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#else
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static inline void init_hypervisor(struct cpuinfo_x86 *c) { }
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static inline void init_hypervisor_platform(void) { }
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static inline bool hypervisor_x2apic_available(void) { return false; }
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#endif /* CONFIG_HYPERVISOR_GUEST */
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#endif /* _ASM_X86_HYPERVISOR_H */
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