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From: Wei Liu <wei.liu2@citrix.com>
To: Shannon Zhao <zhaoshenglong@huawei.com>
Cc: sstabellini@kernel.org, wei.liu2@citrix.com,
	ian.jackson@eu.citrix.com, peter.huangpeng@huawei.com,
	xen-devel@lists.xen.org, Julien Grall <julien.grall@arm.com>,
	shannon.zhao@linaro.org
Subject: Re: [PATCH RESEND 03/14] libxc: Add placeholders for ACPI tables blob and size
Date: Thu, 16 Jun 2016 11:49:52 +0100	[thread overview]
Message-ID: <20160616104952.GL28116@citrix.com> (raw)
In-Reply-To: <5756BEDA.9090207@huawei.com>

On Tue, Jun 07, 2016 at 08:32:26PM +0800, Shannon Zhao wrote:
[...]
> That's its own mechanism I think and UEFI wants all the memory maps
> under its control. And it's same for QEMU(x86 and ARM) and also for Xen
> on x86. You can have a look at the OvmfPkg/AcpiPlatformDxe/Xen.c which
> is used for x86 Xen DomU.
> 

I don't think Xen relocates ACPI tables in OVMF. The code scans for
signature in code.

I also don't quite get the "control memory map" part. OVMF doesn't
update the memory map, it accepts the memory map provided by hvmloader
as-is. See OvmfPkg/PlatformPei/Xen.c:XenGetE820Map.

Note that I'm talking about this in a pretty out of context way, so I
could be misunderstading what you said.

> > Anyway, you rely on the UEFI firmware to always relocating the tables.
> > What would happen if they decide to remove this behavior?
> Eh, I don't believe this would happen.
> 

I think we can only rely on the spec to be sure.

Wei.

> -- 
> Shannon
> 

_______________________________________________
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Xen-devel@lists.xen.org
http://lists.xen.org/xen-devel

  parent reply	other threads:[~2016-06-16 10:49 UTC|newest]

Thread overview: 104+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-05-31  5:02 [PATCH RESEND 00/14] Xen ARM DomU ACPI support Shannon Zhao
2016-05-31  5:02 ` [PATCH RESEND 01/14] libxl/arm: Fix the function name in error log Shannon Zhao
2016-06-03 19:25   ` Wei Liu
2016-06-17 10:46     ` Wei Liu
2016-06-20  1:12       ` Shannon Zhao
2016-05-31  5:02 ` [PATCH RESEND 02/14] libxl/arm: Factor out codes for generating DTB Shannon Zhao
2016-06-03 19:25   ` Wei Liu
2016-05-31  5:02 ` [PATCH RESEND 03/14] libxc: Add placeholders for ACPI tables blob and size Shannon Zhao
2016-06-06 10:00   ` Stefano Stabellini
2016-06-06 12:16     ` Wei Liu
2016-06-06 14:20       ` Shannon Zhao
2016-06-07 11:05   ` Julien Grall
2016-06-07 11:13     ` Shannon Zhao
2016-06-07 11:27       ` Julien Grall
2016-06-07 11:35         ` Shannon Zhao
2016-06-07 11:42           ` Julien Grall
2016-06-07 11:59             ` Shannon Zhao
2016-06-07 12:06               ` Julien Grall
2016-06-07 12:32                 ` Shannon Zhao
2016-06-07 13:06                   ` Julien Grall
2016-06-16  6:53                     ` Shannon Zhao
2016-06-16 10:21                       ` Julien Grall
2016-06-16 10:45                         ` Shannon Zhao
2016-06-16 11:04                           ` Julien Grall
2016-06-16 10:49                   ` Wei Liu [this message]
2016-06-16 10:53                     ` Shannon Zhao
2016-06-16 11:04                       ` Wei Liu
2016-06-07 12:02             ` Julien Grall
2016-06-07 12:27               ` Shannon Zhao
2016-05-31  5:02 ` [PATCH RESEND 04/14] tools: add ACPI tables relevant definitions Shannon Zhao
2016-06-06 10:04   ` Stefano Stabellini
2016-06-06 10:11     ` Julien Grall
2016-06-06 10:27       ` Shannon Zhao
2016-06-06 12:16         ` Wei Liu
2016-06-06 14:19           ` Shannon Zhao
2016-06-22  3:24           ` Shannon Zhao
2016-06-22  8:35             ` Julien Grall
2016-06-22  8:50               ` Shannon Zhao
2016-06-22  8:55                 ` Julien Grall
2016-06-22  9:38             ` [PATCH RESEND 04/14] tools: add ACPI tables relevant definitions (and more) Wei Liu
2016-06-22 10:06               ` Shannon Zhao
2016-05-31  5:02 ` [PATCH RESEND 05/14] libxl/arm: Construct ACPI GTDT table Shannon Zhao
2016-06-06 11:40   ` Stefano Stabellini
2016-06-06 11:52     ` Julien Grall
2016-06-06 12:04       ` Stefano Stabellini
2016-06-06 14:31         ` Shannon Zhao
2016-06-06 14:50           ` Stefano Stabellini
2016-06-06 15:42             ` Julien Grall
2016-06-07  9:41               ` Stefano Stabellini
2016-06-06 15:35         ` Julien Grall
2016-06-07  9:48           ` Stefano Stabellini
2016-06-07 11:55             ` Wei Liu
2016-06-17  3:29     ` Shannon Zhao
2016-06-17  8:17       ` Julien Grall
2016-06-17  9:15         ` Stefano Stabellini
2016-06-17 13:27           ` Julien Grall
2016-06-06 12:18   ` Wei Liu
2016-06-07 11:02     ` Julien Grall
2016-06-07 11:19   ` Julien Grall
2016-06-07 11:30     ` Shannon Zhao
2016-06-07 11:36       ` Julien Grall
2016-06-07 11:39         ` Shannon Zhao
2016-06-07 11:43           ` Julien Grall
2016-05-31  5:02 ` [PATCH RESEND 06/14] libxl/arm: Construct ACPI FADT table Shannon Zhao
2016-06-07 13:17   ` Julien Grall
2016-06-07 14:13     ` Shannon Zhao
2016-06-07 14:14       ` Julien Grall
2016-05-31  5:02 ` [PATCH RESEND 07/14] libxl/arm: Construct ACPI DSDT table Shannon Zhao
2016-06-07 13:42   ` Julien Grall
2016-06-16  6:25     ` Shannon Zhao
2016-06-16  9:44       ` Julien Grall
2016-06-16 10:01         ` Stefano Stabellini
2016-05-31  5:03 ` [PATCH RESEND 08/14] libxl/arm: Construct ACPI MADT table Shannon Zhao
2016-06-07 13:40   ` Julien Grall
2016-05-31  5:03 ` [PATCH RESEND 09/14] libxl/arm: Construct ACPI XSDT table Shannon Zhao
2016-05-31  5:03 ` [PATCH RESEND 10/14] libxl/arm: Construct ACPI RSDP table Shannon Zhao
2016-05-31  5:03 ` [PATCH RESEND 11/14] libxl/arm: Initialize domain param HVM_PARAM_CALLBACK_IRQ Shannon Zhao
2016-05-31  5:03 ` [PATCH RESEND 12/14] libxl/arm: Add ACPI module Shannon Zhao
2016-06-07 13:47   ` Julien Grall
2016-05-31  5:03 ` [PATCH RESEND 13/14] libxl/arm: initialize memory information of ACPI blob Shannon Zhao
2016-06-06 11:40   ` Stefano Stabellini
2016-06-06 14:35     ` Shannon Zhao
2016-05-31  5:03 ` [PATCH RESEND 14/14] libxc/xc_dom_core: Copy ACPI tables to guest memory space Shannon Zhao
2016-05-31 10:47 ` [PATCH RESEND 00/14] Xen ARM DomU ACPI support Julien Grall
2016-05-31 14:19   ` Shannon Zhao
2016-06-03 19:24 ` Wei Liu
2016-06-03 20:02   ` Konrad Rzeszutek Wilk
2016-06-03 20:20     ` Boris Ostrovsky
2016-06-03 20:27       ` Wei Liu
2016-06-03 20:36         ` Boris Ostrovsky
2016-06-06 11:41 ` Stefano Stabellini
2016-06-06 12:26 ` Wei Liu
2016-06-06 15:37   ` Boris Ostrovsky
2016-06-06 16:50     ` Boris Ostrovsky
2016-06-07 10:54       ` Julien Grall
2016-06-07 14:24         ` Boris Ostrovsky
2016-06-06 15:48   ` Julien Grall
2016-06-07  1:07     ` Shannon Zhao
2016-06-07 11:00       ` Julien Grall
2016-06-16 11:20         ` Wei Liu
2016-06-16 13:25           ` Boris Ostrovsky
2016-06-17 10:14             ` Wei Liu
2016-06-17  2:03           ` Shannon Zhao
2016-06-17  8:18           ` Julien Grall

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