Commit 6a4d7550 authored by Nadav Har'El's avatar Nadav Har'El Committed by Avi Kivity

KVM: nVMX: Implement VMPTRST

This patch implements the VMPTRST instruction.
Signed-off-by: default avatarNadav Har'El <nyh@il.ibm.com>
Signed-off-by: default avatarMarcelo Tosatti <mtosatti@redhat.com>
parent 63846663
......@@ -4937,6 +4937,32 @@ static int handle_vmptrld(struct kvm_vcpu *vcpu)
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
* 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_VMLAUNCH] = handle_vmx_insn,
[EXIT_REASON_VMPTRLD] = handle_vmptrld,
[EXIT_REASON_VMPTRST] = handle_vmx_insn,
[EXIT_REASON_VMPTRST] = handle_vmptrst,
[EXIT_REASON_VMREAD] = handle_vmx_insn,
[EXIT_REASON_VMRESUME] = handle_vmx_insn,
[EXIT_REASON_VMWRITE] = handle_vmx_insn,
......
......@@ -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);
}
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,
unsigned int bytes,
struct x86_exception *exception)
......@@ -3901,6 +3901,7 @@ static int kvm_write_guest_virt_system(struct x86_emulate_ctxt *ctxt,
out:
return r;
}
EXPORT_SYMBOL_GPL(kvm_write_guest_virt_system);
static int emulator_read_emulated(struct x86_emulate_ctxt *ctxt,
unsigned long addr,
......
......@@ -85,4 +85,8 @@ int kvm_read_guest_virt(struct x86_emulate_ctxt *ctxt,
gva_t addr, void *val, unsigned int bytes,
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
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment