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RE: [PATCH] x86/EPT: drop "tm" field of EPT entry
- To: Jan Beulich <jbeulich@xxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: "Tian, Kevin" <kevin.tian@xxxxxxxxx>
- Date: Tue, 31 Aug 2021 01:00:27 +0000
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- Cc: "Nakajima, Jun" <jun.nakajima@xxxxxxxxx>
- Delivery-date: Tue, 31 Aug 2021 01:00:39 +0000
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- Thread-topic: [PATCH] x86/EPT: drop "tm" field of EPT entry
> From: Jan Beulich <jbeulich@xxxxxxxx>
> Sent: Monday, August 30, 2021 10:22 PM
>
> VT-d spec 3.2 converted this bit (back) to reserved. Since there's no
> use of it anywhere in the tree, simply rename it and adjust its comment.
>
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
Reviewed-by: Kevin Tian <kevin.tian@xxxxxxxxx>
>
> --- a/xen/include/asm-x86/hvm/vmx/vmx.h
> +++ b/xen/include/asm-x86/hvm/vmx/vmx.h
> @@ -46,8 +46,7 @@ typedef union {
> mfn : 40, /* bits 51:12 - Machine physical frame number */
> sa_p2mt : 6, /* bits 57:52 - Software available 2 */
> access : 4, /* bits 61:58 - p2m_access_t */
> - tm : 1, /* bit 62 - VT-d transient-mapping hint in
> - shared EPT/VT-d usage */
> + _rsvd : 1, /* bit 62 - reserved */
> suppress_ve : 1; /* bit 63 - suppress #VE */
> };
> u64 epte;
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