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From: Ram Pai <linuxram@us.ibm.com>
To: Julia Lawall <julia.lawall@inria.fr>
Cc: sukadev@linux.ibm.com, corbet@lwn.net,
	linuxppc-dev@lists.ozlabs.org, linux-doc@vger.kernel.org
Subject: Re:  Documentation/powerpc: Ultravisor API
Date: Thu, 30 Jul 2020 09:48:42 -0700
Message-ID: <20200730164842.GA5882@oc0525413822.ibm.com> (raw)
In-Reply-To: <alpine.DEB.2.22.394.2007301231140.2548@hadrien>

On Thu, Jul 30, 2020 at 12:35:38PM +0200, Julia Lawall wrote:
> The file Documentation/powerpc/ultravisor.rst contains:
> 
>     Only valid value(s) in ``flags`` are:
> 
>         * H_PAGE_IN_SHARED which indicates that the page is to be shared
> 	  with the Ultravisor.
> 
>         * H_PAGE_IN_NONSHARED indicates that the UV is not anymore
>           interested in the page. Applicable if the page is a shared page.
> 
> The flag H_PAGE_IN_SHARED exists in the Linux kernel
> (arch/powerpc/include/asm/hvcall.h), but the flag H_PAGE_IN_NONSHARED does
> not.  Should the documentation be changed in some way?

Currently the code assumes H_PAGE_IN_NONSHARED as !H_PAGE_IN_SHARED.

We need to patch the kernel to explicitly define the flag.
I will submit a patch towards this.

Thanks,
RP

  reply index

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-30 10:35 Julia Lawall
2020-07-30 16:48 ` Ram Pai [this message]
2020-07-30 23:21 ` [PATCH] KVM: PPC: Book3S HV: Define H_PAGE_IN_NONSHARED for H_SVM_PAGE_IN hcall Ram Pai
2020-07-31  4:33   ` Bharata B Rao
2020-07-31  8:10     ` Ram Pai

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