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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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2f333bcb4e
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>
41 lines
833 B
C
41 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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