diff options
| author | Marcelo Tosatti <mtosatti@redhat.com> | 2008-06-27 14:58:02 -0300 |
|---|---|---|
| committer | Avi Kivity <avi@qumranet.com> | 2008-10-15 10:13:57 +0200 |
| commit | 5fdbf9765b7ba6a45100851154768de703d51e76 (patch) | |
| tree | ec34ec9357575dc4190e5228a6eabfd5f81b66a5 /include/asm-x86 | |
| parent | ca60dfbb69afb549e33527cbf676e4daf8febfb5 (diff) | |
| download | talos-op-linux-5fdbf9765b7ba6a45100851154768de703d51e76.tar.gz talos-op-linux-5fdbf9765b7ba6a45100851154768de703d51e76.zip | |
KVM: x86: accessors for guest registers
As suggested by Avi, introduce accessors to read/write guest registers.
This simplifies the ->cache_regs/->decache_regs interface, and improves
register caching which is important for VMX, where the cost of
vmcs_read/vmcs_write is significant.
[avi: fix warnings]
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'include/asm-x86')
| -rw-r--r-- | include/asm-x86/kvm_host.h | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/include/asm-x86/kvm_host.h b/include/asm-x86/kvm_host.h index 69794547f514..8c886be0103f 100644 --- a/include/asm-x86/kvm_host.h +++ b/include/asm-x86/kvm_host.h @@ -89,7 +89,7 @@ extern struct list_head vm_list; struct kvm_vcpu; struct kvm; -enum { +enum kvm_reg { VCPU_REGS_RAX = 0, VCPU_REGS_RCX = 1, VCPU_REGS_RDX = 2, @@ -108,6 +108,7 @@ enum { VCPU_REGS_R14 = 14, VCPU_REGS_R15 = 15, #endif + VCPU_REGS_RIP, NR_VCPU_REGS }; @@ -219,8 +220,13 @@ struct kvm_vcpu_arch { int interrupt_window_open; unsigned long irq_summary; /* bit vector: 1 per word in irq_pending */ DECLARE_BITMAP(irq_pending, KVM_NR_INTERRUPTS); - unsigned long regs[NR_VCPU_REGS]; /* for rsp: vcpu_load_rsp_rip() */ - unsigned long rip; /* needs vcpu_load_rsp_rip() */ + /* + * rip and regs accesses must go through + * kvm_{register,rip}_{read,write} functions. + */ + unsigned long regs[NR_VCPU_REGS]; + u32 regs_avail; + u32 regs_dirty; unsigned long cr0; unsigned long cr2; @@ -414,8 +420,7 @@ struct kvm_x86_ops { unsigned long (*get_dr)(struct kvm_vcpu *vcpu, int dr); void (*set_dr)(struct kvm_vcpu *vcpu, int dr, unsigned long value, int *exception); - void (*cache_regs)(struct kvm_vcpu *vcpu); - void (*decache_regs)(struct kvm_vcpu *vcpu); + void (*cache_reg)(struct kvm_vcpu *vcpu, enum kvm_reg reg); unsigned long (*get_rflags)(struct kvm_vcpu *vcpu); void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags); |
