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RE: [PATCH 2/8] VT-d: drop ROOT_ENTRY_NR
- To: "Beulich, Jan" <JBeulich@xxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: "Tian, Kevin" <kevin.tian@xxxxxxxxx>
- Date: Wed, 20 Apr 2022 06:22:48 +0000
- Accept-language: en-US
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- Cc: Paul Durrant <paul@xxxxxxx>, Pau Monné, Roger <roger.pau@xxxxxxxxxx>
- Delivery-date: Wed, 20 Apr 2022 06:22:57 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
- Thread-index: AQHYTYekX5EMpeqzC0Kga/gFrdxJaaz4XMTg
- Thread-topic: [PATCH 2/8] VT-d: drop ROOT_ENTRY_NR
> From: Jan Beulich <jbeulich@xxxxxxxx>
> Sent: Monday, April 11, 2022 5:36 PM
>
> It's not only misplaced, but entirely unused.
>
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
Reviewed-by: Kevin Tian <kevin.tian@xxxxxxxxx>
>
> --- a/xen/drivers/passthrough/vtd/iommu.h
> +++ b/xen/drivers/passthrough/vtd/iommu.h
> @@ -204,7 +204,6 @@ struct context_entry {
> __uint128_t full;
> };
> };
> -#define ROOT_ENTRY_NR (PAGE_SIZE_4K/sizeof(struct root_entry))
> #define context_present(c) ((c).lo & 1)
> #define context_fault_disable(c) (((c).lo >> 1) & 1)
> #define context_translation_type(c) (((c).lo >> 2) & 3)
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