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x86: KVM guest: add basic paravirt support

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Add basic KVM paravirt support. Avoid vm-exits on IO delays.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
This commit is contained in:
Marcelo Tosatti
2008-02-22 12:21:36 -05:00
committed by Avi Kivity
parent a28e4f5a62
commit 0cf1bfd273
6 changed files with 70 additions and 0 deletions
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6
include/linux/kvm_para.h
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@ -20,6 +20,12 @@
#include <asm/kvm_para.h>
#ifdef __KERNEL__
#ifdef CONFIG_KVM_GUEST
void __init kvm_guest_init(void);
#else
#define kvm_guest_init() do { } while (0)
#endif
static inline int kvm_para_has_feature(unsigned int feature)
{
if (kvm_arch_para_features() & (1UL << feature))