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From: Andrew Cooper <andrew.cooper3@citrix.com>
To: Paul Durrant <paul@xen.org>, <xen-devel@lists.xenproject.org>
Cc: "Paul Durrant" <pdurrant@amazon.com>,
	"George Dunlap" <george.dunlap@citrix.com>,
	"Ian Jackson" <iwj@xenproject.org>,
	"Jan Beulich" <jbeulich@suse.com>,
	"Julien Grall" <julien@xen.org>,
	"Stefano Stabellini" <sstabellini@kernel.org>,
	"Wei Liu" <wl@xen.org>,
	"Volodymyr Babchuk" <Volodymyr_Babchuk@epam.com>,
	"Roger Pau Monné" <roger.pau@citrix.com>
Subject: Re: [PATCH v10 01/11] docs / include: introduce a new framework for 'domain context' records
Date: Mon, 25 Jan 2021 18:18:51 +0000	[thread overview]
Message-ID: <9627b5ce-3c96-2f8b-bd04-0db5ca2486c1@citrix.com> (raw)
In-Reply-To: <20201008185735.29875-2-paul@xen.org>

On 08/10/2020 19:57, Paul Durrant wrote:
> diff --git a/xen/include/public/save.h b/xen/include/public/save.h
> new file mode 100644
> index 0000000000..c4be9f570c
> --- /dev/null
> +++ b/xen/include/public/save.h
> @@ -0,0 +1,66 @@
> +/*
> + * save.h
> + *
> + * Structure definitions for common PV/HVM domain state that is held by Xen.

What exactly is, and is not in scope, for this new stream?  The PV above
I think refers to "paravirtual state", not PV guests.

> +#define _DOMAIN_CONTEXT_RECORD_ALIGN 3
> +#define DOMAIN_CONTEXT_RECORD_ALIGN (1U << _DOMAIN_CONTEXT_RECORD_ALIGN)

Do we need the logarithm version?

> +
> +enum {
> +    DOMAIN_CONTEXT_END,
> +    DOMAIN_CONTEXT_START,
> +    /* New types go here */
> +    DOMAIN_CONTEXT_NR_TYPES
> +};

Does this enum ever end up in an API?

We might be ok as we're inside __XEN_TOOLS__, but enums normally cannot
be used in ABI's because their size is implementation defined, and not
always 4 bytes.

~Andrew


  parent reply	other threads:[~2021-01-25 18:19 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-08 18:57 [PATCH v10 00/11] domain context infrastructure Paul Durrant
2020-10-08 18:57 ` [PATCH v10 01/11] docs / include: introduce a new framework for 'domain context' records Paul Durrant
2020-10-19 13:46   ` Jan Beulich
2021-01-25 18:25     ` Andrew Cooper
2021-01-26  8:55       ` Jan Beulich
2021-01-25 18:18   ` Andrew Cooper [this message]
2021-01-26  9:31     ` Jan Beulich
2020-10-08 18:57 ` [PATCH v10 02/11] xen: introduce implementation of save/restore of 'domain context' Paul Durrant
2020-10-19 14:07   ` Jan Beulich
2021-01-25 18:36   ` Andrew Cooper
2020-10-08 18:57 ` [PATCH v10 03/11] xen/common/domctl: introduce XEN_DOMCTL_get/set_domain_context Paul Durrant
2020-10-19 14:30   ` Jan Beulich
2020-10-19 15:06     ` Jan Beulich
2020-10-08 18:57 ` [PATCH v10 04/11] tools/misc: add xen-domctx to present domain context Paul Durrant
2020-10-08 18:57 ` [PATCH v10 05/11] common/domain: add a domain context record for shared_info Paul Durrant
2020-10-19 15:25   ` Jan Beulich
2021-01-25 19:11   ` Andrew Cooper
2020-10-08 18:57 ` [PATCH v10 06/11] x86/time: add a domain context record for tsc_info Paul Durrant
2021-01-25 19:24   ` Andrew Cooper
2020-10-08 18:57 ` [PATCH v10 07/11] docs/specs: add missing definitions to libxc-migration-stream Paul Durrant
2021-01-25 19:28   ` Andrew Cooper
2020-10-08 18:57 ` [PATCH v10 08/11] docs / tools: specify migration v4 to include DOMAIN_CONTEXT Paul Durrant
2021-01-25 19:43   ` Andrew Cooper
2020-10-08 18:57 ` [PATCH v10 09/11] tools/python: modify libxc.py to verify v4 stream Paul Durrant
2021-01-25 19:45   ` Andrew Cooper
2020-10-08 18:57 ` [PATCH v10 10/11] tools/libs/guest: add code to restore a v4 libxc stream Paul Durrant
2021-01-25 20:04   ` Andrew Cooper
2020-10-08 18:57 ` [PATCH v10 11/11] tools/libs/guest: add code to save " Paul Durrant
2021-01-25 20:11   ` Andrew Cooper
2021-01-25 20:15 ` [PATCH v10 00/11] domain context infrastructure Andrew Cooper

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