lkml.org 
[lkml]   [2018]   [Mar]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 1/2] KVM: VMX: Introduce handle_ud()
On Mon, Mar 26, 2018 at 07:12:14PM -0700, Wanpeng Li wrote:
> From: Wanpeng Li <wanpengli@tencent.com>
>
> Introduce handle_ud() to handle invalid opcode, this function will be
> used by later patches.
>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

Thank you!
> Cc: Paolo Bonzini <pbonzini@redhat.com>
> Cc: Radim Krčmář <rkrcmar@redhat.com>
> Cc: Andrew Cooper <andrew.cooper3@citrix.com>
> Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
> ---
> arch/x86/kvm/vmx.c | 22 ++++++++++++++--------
> 1 file changed, 14 insertions(+), 8 deletions(-)
>
> diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
> index 9bc05f5..0f99833 100644
> --- a/arch/x86/kvm/vmx.c
> +++ b/arch/x86/kvm/vmx.c
> @@ -6215,6 +6215,18 @@ static int handle_machine_check(struct kvm_vcpu *vcpu)
> return 1;
> }
>
> +static int handle_ud(struct kvm_vcpu *vcpu)
> +{
> + enum emulation_result er;
> +
> + er = emulate_instruction(vcpu, EMULTYPE_TRAP_UD);
> + if (er == EMULATE_USER_EXIT)
> + return 0;
> + if (er != EMULATE_DONE)
> + kvm_queue_exception(vcpu, UD_VECTOR);
> + return 1;
> +}
> +
> static int handle_exception(struct kvm_vcpu *vcpu)
> {
> struct vcpu_vmx *vmx = to_vmx(vcpu);
> @@ -6233,14 +6245,8 @@ static int handle_exception(struct kvm_vcpu *vcpu)
> if (is_nmi(intr_info))
> return 1; /* already handled by vmx_vcpu_run() */
>
> - if (is_invalid_opcode(intr_info)) {
> - er = emulate_instruction(vcpu, EMULTYPE_TRAP_UD);
> - if (er == EMULATE_USER_EXIT)
> - return 0;
> - if (er != EMULATE_DONE)
> - kvm_queue_exception(vcpu, UD_VECTOR);
> - return 1;
> - }
> + if (is_invalid_opcode(intr_info))
> + return handle_ud(vcpu);
>
> error_code = 0;
> if (intr_info & INTR_INFO_DELIVER_CODE_MASK)
> --
> 2.7.4
>

\
 
 \ /
  Last update: 2018-03-27 06:40    [W:0.055 / U:13.104 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site