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KVM: nVMX: Implement VMPTRST

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This patch implements the VMPTRST instruction.

Signed-off-by: Nadav Har'El <nyh@il.ibm.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This commit is contained in:
Nadav Har'El 2011-05-25 23:08:00 +03:00 • committed by Avi Kivity
parent 63846663ea
commit 6a4d755060
3 changed files with 33 additions and 2 deletions
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28
arch/x86/kvm/vmx.c
View file

@ -4937,6 +4937,32 @@ static int handle_vmptrld(struct kvm_vcpu *vcpu)
return 1; return 1;
} }
/* Emulate the VMPTRST instruction */
static int handle_vmptrst(struct kvm_vcpu *vcpu)
{
unsigned long exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
u32 vmx_instruction_info = vmcs_read32(VMX_INSTRUCTION_INFO);
gva_t vmcs_gva;
struct x86_exception e;
if (!nested_vmx_check_permission(vcpu))
return 1;
if (get_vmx_mem_address(vcpu, exit_qualification,
vmx_instruction_info, &vmcs_gva))
return 1;
/* ok to use *_system, as nested_vmx_check_permission verified cpl=0 */
if (kvm_write_guest_virt_system(&vcpu->arch.emulate_ctxt, vmcs_gva,
(void *)&to_vmx(vcpu)->nested.current_vmptr,
sizeof(u64), &e)) {
kvm_inject_page_fault(vcpu, &e);
return 1;
}
nested_vmx_succeed(vcpu);
skip_emulated_instruction(vcpu);
return 1;
}
/* /*
* The exit handlers return 1 if the exit was handled fully and guest execution * The exit handlers return 1 if the exit was handled fully and guest execution
* may resume. Otherwise they set the kvm_run parameter to indicate what needs * may resume. Otherwise they set the kvm_run parameter to indicate what needs
@ -4961,7 +4987,7 @@ static int (*kvm_vmx_exit_handlers[])(struct kvm_vcpu *vcpu) = {
[EXIT_REASON_VMCLEAR] = handle_vmclear, [EXIT_REASON_VMCLEAR] = handle_vmclear,
[EXIT_REASON_VMLAUNCH] = handle_vmx_insn, [EXIT_REASON_VMLAUNCH] = handle_vmx_insn,
[EXIT_REASON_VMPTRLD] = handle_vmptrld, [EXIT_REASON_VMPTRLD] = handle_vmptrld,
[EXIT_REASON_VMPTRST] = handle_vmx_insn, [EXIT_REASON_VMPTRST] = handle_vmptrst,
[EXIT_REASON_VMREAD] = handle_vmx_insn, [EXIT_REASON_VMREAD] = handle_vmx_insn,
[EXIT_REASON_VMRESUME] = handle_vmx_insn, [EXIT_REASON_VMRESUME] = handle_vmx_insn,
[EXIT_REASON_VMWRITE] = handle_vmx_insn, [EXIT_REASON_VMWRITE] = handle_vmx_insn,

3
arch/x86/kvm/x86.c
View file

@ -3869,7 +3869,7 @@ static int kvm_read_guest_virt_system(struct x86_emulate_ctxt *ctxt,
return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, 0, exception); return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, 0, exception);
} }
static int kvm_write_guest_virt_system(struct x86_emulate_ctxt *ctxt, int kvm_write_guest_virt_system(struct x86_emulate_ctxt *ctxt,
gva_t addr, void *val, gva_t addr, void *val,
unsigned int bytes, unsigned int bytes,
struct x86_exception *exception) struct x86_exception *exception)
@ -3901,6 +3901,7 @@ static int kvm_write_guest_virt_system(struct x86_emulate_ctxt *ctxt,
out: out:
return r; return r;
} }
EXPORT_SYMBOL_GPL(kvm_write_guest_virt_system);
static int emulator_read_emulated(struct x86_emulate_ctxt *ctxt, static int emulator_read_emulated(struct x86_emulate_ctxt *ctxt,
unsigned long addr, unsigned long addr,

4
arch/x86/kvm/x86.h
View file

@ -85,4 +85,8 @@ int kvm_read_guest_virt(struct x86_emulate_ctxt *ctxt,
gva_t addr, void *val, unsigned int bytes, gva_t addr, void *val, unsigned int bytes,
struct x86_exception *exception); struct x86_exception *exception);
int kvm_write_guest_virt_system(struct x86_emulate_ctxt *ctxt,
gva_t addr, void *val, unsigned int bytes,
struct x86_exception *exception);
#endif #endif