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From: Marc Zyngier <>
To: Zhenyu Ye <>
Subject: Re: [RFC PATCH v1 0/3] arm64: tlb: add support for TTL field
Date: Wed, 11 Mar 2020 09:12:54 +0000	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>


On 2020-03-11 02:53, Zhenyu Ye wrote:
> ARMv8.4-TTL provides the TTL field in tlbi instruction to indicate
> the level of translation table walk holding the leaf entry for the
> address that is being invalidated. Hardware can use this information
> to determine if there was a risk of splintering.
> This set of patches adds TTL field to __TLBI_ADDR, and uses
> Architecture-specific MM context to pass the TTL value to tlb 
> interface.
> The default value of TTL is 0, which will not have any impact on the
> TLB maintenance instructions. The last patch trys to use TTL field in
> some obviously tlb-flush interface.

I have already posted some support for ARMv8.4-TTL as part of my NV 
series [1],
patches 62, 67, 68 and 69. This only deals with Stage-2 translation so 
If you intend to add Stage-1, please build on top of what I have already 
(I can extract the patches on a separate branch if you want).



Jazz is not dead. It just smells funny...

  parent reply	other threads:[~2020-03-11  9:12 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-11  2:53 Zhenyu Ye
2020-03-11  2:53 ` [RFC PATCH v1 1/3] arm64: tlb: add TTL field to __TLBI_ADDR Zhenyu Ye
2020-03-11  2:53 ` [RFC PATCH v1 2/3] arm64: tlb: use mm_struct.context.flags to indicate TTL Zhenyu Ye
2020-03-11  2:53 ` [RFC PATCH v1 3/3] arm64: tlb: add support for TTL in some functions Zhenyu Ye
2020-03-11  9:12 ` Marc Zyngier [this message]
2020-03-11 11:29   ` [RFC PATCH v1 0/3] arm64: tlb: add support for TTL field yezhenyu (A)
2020-03-17 10:59   ` yezhenyu (A)

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