Re: [PATCH v5 04/10] x86/hyper-v: fast hypercall implementation

From	Andy Shevchenko <andy.shevchenko@gmail.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH v5 04/10] x86/hyper-v: fast hypercall implementation
Date	2017-05-30 18:40 +0200
Message-ID	<tMSlA-1h4-19@gated-at.bofh.it> (permalink)
References	<tMNFf-6JG-3@gated-at.bofh.it> <tMNFg-6JG-27@gated-at.bofh.it>
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On Tue, May 30, 2017 at 2:34 PM, Vitaly Kuznetsov <vkuznets@redhat.com> wrote:
> Hyper-V supports 'fast' hypercalls when all parameters are passed through
> registers. Implement an inline version of a simpliest of these calls:
> hypercall with one 8-byte input and no output.

> +       u64 hv_status, control = (u64)code | BIT(16); /* 'fast' flag */

It might make sense to define magic with appropriate name.

-- 
With Best Regards,
Andy Shevchenko

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[PATCH v5 04/10] x86/hyper-v: fast hypercall implementation Vitaly Kuznetsov <vkuznets@redhat.com> - 2017-05-30 13:40 +0200
  Re: [PATCH v5 04/10] x86/hyper-v: fast hypercall implementation Andy Shevchenko <andy.shevchenko@gmail.com> - 2017-05-30 18:40 +0200

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