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Re: Spectre V1 diagnostic / mitigation

From: Florian Weimer <fweimer at redhat dot com>
To: Richard Biener <rguenther at suse dot de>
Cc: "Richard Earnshaw \(lists\)" <Richard dot Earnshaw at arm dot com>, gcc at gcc dot gnu dot org
Date: Wed, 19 Dec 2018 12:34:53 +0100
Subject: Re: Spectre V1 diagnostic / mitigation
References: <alpine.LSU.2.20.1812181619160.1827@zhemvz.fhfr.qr> <2c5cb185-9a71-19f6-a5b7-706b0bf31594@arm.com> <alpine.LSU.2.20.1812191218050.1827@zhemvz.fhfr.qr>

* Richard Biener:

> The cost is probably target dependent - on x86 it's simply a $fs based
> load/store.

Do you need to reserve something in the TCB for this?

Thanks,
Florian

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References:
- Spectre V1 diagnostic / mitigation
  - From: Richard Biener
- Re: Spectre V1 diagnostic / mitigation
  - From: Richard Earnshaw (lists)
- Re: Spectre V1 diagnostic / mitigation
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