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![Marcelo Tosatti](/assets/img/avatar_default.png)
Hypercall based pte updates are faster than faults, and also allow use of the lazy MMU mode to batch operations. Don't report the feature if two dimensional paging is enabled. [avi: - one mmu_op hypercall instead of one per op - allow 64-bit gpa on hypercall - don't pass host errors (-ENOMEM) to guest] [akpm: warning fix on i386] Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Avi Kivity <avi@qumranet.com>
40 lines
833 B
C
40 lines
833 B
C
#ifndef __LINUX_KVM_PARA_H
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#define __LINUX_KVM_PARA_H
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/*
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* This header file provides a method for making a hypercall to the host
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* Architectures should define:
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* - kvm_hypercall0, kvm_hypercall1...
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* - kvm_arch_para_features
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* - kvm_para_available
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*/
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/* Return values for hypercalls */
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#define KVM_ENOSYS 1000
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#define KVM_EFAULT EFAULT
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#define KVM_E2BIG E2BIG
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#define KVM_HC_VAPIC_POLL_IRQ 1
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#define KVM_HC_MMU_OP 2
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/*
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* hypercalls use architecture specific
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*/
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#include <asm/kvm_para.h>
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#ifdef __KERNEL__
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#ifdef CONFIG_KVM_GUEST
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void __init kvm_guest_init(void);
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#else
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#define kvm_guest_init() do { } while (0)
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#endif
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static inline int kvm_para_has_feature(unsigned int feature)
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{
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if (kvm_arch_para_features() & (1UL << feature))
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return 1;
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return 0;
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}
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#endif /* __KERNEL__ */
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#endif /* __LINUX_KVM_PARA_H */
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