From: Shannon Zhao <shannon.zhao@linaro.org>
To: Mark Rutland <mark.rutland@arm.com>,
Stefano Stabellini <stefano.stabellini@eu.citrix.com>,
ard.biesheuvel@linaro.org, leif.lindholm@linaro.org
Cc: Shannon Zhao <zhaoshenglong@huawei.com>,
linux-arm-kernel@lists.infradead.org,
stefano.stabellini@citrix.com, david.vrabel@citrix.com,
catalin.marinas@arm.com, will.deacon@arm.com,
julien.grall@citrix.com, xen-devel@lists.xen.org,
devicetree@vger.kernel.org, linux-efi@vger.kernel.org,
linux-kernel@vger.kernel.org, peter.huangpeng@huawei.com,
Jan Beulich <JBeulich@novell.com>,
Ian Campbell <Ian.Campbell@citrix.com>
Subject: Re: [PATCH v2 12/16] ARM: Xen: Document UEFI support on Xen ARM virtual platforms
Date: Tue, 19 Jan 2016 21:43:59 +0800 [thread overview]
Message-ID: <569E3D9F.6050808@linaro.org> (raw)
In-Reply-To: <20160119131348.GJ25024@leverpostej>
On 2016/1/19 21:13, Mark Rutland wrote:
> On Tue, Jan 19, 2016 at 12:23:17PM +0000, Stefano Stabellini wrote:
>> >On Tue, 19 Jan 2016, Mark Rutland wrote:
>>> > >On Tue, Jan 19, 2016 at 06:25:25PM +0800, Shannon Zhao wrote:
>>>>>> > > > >>We don't do this in Documentation/arm/uefi.txt, and I don't see why we
>>>>>> > > > >>should do so here.
>>>>>> > > > >>
>>>>>> > > > >>Does Xen handle arbitrary size memory map descriptors? I'm not sure what
>>>>>> > > > >>new information might be passed in future additions to the descriptor
>>>>>> > > > >>format, and I'm not sure what should happen in the Dom0 case.
>>>>> > > > >
>>>>> > > > >Xen passes to Dom0 the memory map in the same format as the native
>>>>> > > > >memory map.
>>> > >
>>> > >Does Xen parse or modify the EFI memory map in any way?
>> >
>> >Xen:
>> >- calls EFI_BOOT_SERVICES.GetMemoryMap()
>> >- takes note of the memory regions for its own usage
>> >- create the fdt notes, including efi-mmap-start, with a pointer to it
>> >
>> >
>>> > >Does it pass the raw values returned by EFI_BOOT_SERVICES.GetMemoryMap()
>>> > >through to the xen,uefi-* properties, or does is make any static
>>> > >assumptions about what the values will be?
>> >
>> >It just passes the raw values.
> I take it that means that any memory carved out for Xen itself is
> described/discovered via a separate mechanism? How does that work
For Xen hypervisor booting on UEFI, it get the EFI memory map through
the similar way like Linux, e.g. call EFI_BOOT_SERVICES.GetMemoryMap().
For Dom0, Xen will create a new EFI memory map for Dom0.
See [PATCH v3 52/62] arm/acpi: Prepare EFI memory descriptor for Dom0
http://lists.xen.org/archives/html/xen-devel/2015-11/msg01884.html
Thanks,
--
Shannon
next prev parent reply other threads:[~2016-01-19 13:44 UTC|newest]
Thread overview: 72+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-15 6:55 [PATCH v2 00/16] Add ACPI support for Xen Dom0 on ARM64 Shannon Zhao
2016-01-15 6:55 ` [PATCH v2 01/16] Xen: ACPI: Hide UART used by Xen Shannon Zhao
2016-01-15 15:39 ` Stefano Stabellini
2016-01-18 10:32 ` Mark Rutland
2016-01-18 11:38 ` Stefano Stabellini
2016-01-15 6:55 ` [PATCH v2 02/16] xen/grant-table: Move xlated_setup_gnttab_pages to common place Shannon Zhao
2016-01-15 15:53 ` [Xen-devel] " Stefano Stabellini
2016-01-15 6:55 ` [PATCH v2 03/16] Xen: xlate: Use page_to_xen_pfn instead of page_to_pfn Shannon Zhao
2016-01-15 17:08 ` [Xen-devel] " Stefano Stabellini
2016-01-18 5:08 ` Shannon Zhao
2016-01-19 14:59 ` Stefano Stabellini
2016-01-19 15:10 ` Shannon Zhao
2016-01-15 6:55 ` [PATCH v2 04/16] arm/xen: Use xen_xlate_map_ballooned_pages to setup grant table Shannon Zhao
2016-01-15 17:21 ` Stefano Stabellini
2016-01-15 6:55 ` [PATCH v2 05/16] xen: memory : Add new XENMAPSPACE type XENMAPSPACE_dev_mmio Shannon Zhao
2016-01-15 6:55 ` [PATCH v2 06/16] Xen: ARM: Add support for mapping platform device mmio Shannon Zhao
2016-01-15 17:39 ` [Xen-devel] " Stefano Stabellini
2016-01-15 6:55 ` [PATCH v2 07/16] Xen: ARM: Add support for mapping AMBA " Shannon Zhao
2016-01-18 11:58 ` [Xen-devel] " Stefano Stabellini
2016-01-15 6:55 ` [PATCH v2 08/16] xen/hvm/params: Add a new delivery type for event-channel in HVM_PARAM_CALLBACK_IRQ Shannon Zhao
2016-01-18 12:38 ` [Xen-devel] " Stefano Stabellini
2016-01-18 12:42 ` Andrew Cooper
2016-01-18 12:46 ` Stefano Stabellini
2016-01-18 12:52 ` Andrew Cooper
2016-01-20 6:33 ` Shannon Zhao
2016-01-20 8:39 ` Andrew Cooper
2016-01-20 8:45 ` Shannon Zhao
2016-01-15 6:55 ` [PATCH v2 09/16] arm/xen: Get event-channel irq through HVM_PARAM when booting with ACPI Shannon Zhao
2016-01-18 14:38 ` [Xen-devel] " Stefano Stabellini
2016-01-19 8:21 ` Shannon Zhao
2016-01-15 6:55 ` [PATCH v2 10/16] ARM: XEN: Move xen_early_init() before efi_init() Shannon Zhao
2016-01-18 14:59 ` [Xen-devel] " Stefano Stabellini
2016-01-19 8:36 ` Shannon Zhao
2016-01-19 12:14 ` Stefano Stabellini
2016-01-15 6:55 ` [PATCH v2 11/16] ARM64: ACPI: Check if it runs on Xen to enable or disable ACPI Shannon Zhao
2016-01-18 10:41 ` Mark Rutland
2016-01-18 15:07 ` Stefano Stabellini
2016-01-19 8:41 ` Shannon Zhao
2016-01-15 6:55 ` [PATCH v2 12/16] ARM: Xen: Document UEFI support on Xen ARM virtual platforms Shannon Zhao
2016-01-17 3:43 ` Rob Herring
2016-01-18 10:51 ` Mark Rutland
2016-01-18 17:34 ` Stefano Stabellini
2016-01-19 10:25 ` Shannon Zhao
2016-01-19 10:47 ` Mark Rutland
2016-01-19 12:23 ` Stefano Stabellini
2016-01-19 13:13 ` Mark Rutland
2016-01-19 13:18 ` Ard Biesheuvel
2016-01-19 13:43 ` Shannon Zhao [this message]
2016-01-19 14:11 ` Stefano Stabellini
2016-01-21 11:50 ` Mark Rutland
2016-01-15 6:55 ` [PATCH v2 13/16] ARM: XEN: Set EFI_PARAVIRT if Xen supports EFI Shannon Zhao
2016-01-18 10:57 ` Mark Rutland
2016-01-15 6:55 ` [PATCH v2 14/16] Xen: EFI: Parse DT parameters for Xen specific UEFI Shannon Zhao
2016-01-18 11:03 ` Mark Rutland
2016-01-18 15:41 ` [Xen-devel] " Stefano Stabellini
2016-01-19 13:19 ` Shannon Zhao
2016-01-19 13:43 ` Mark Rutland
2016-01-19 13:46 ` Shannon Zhao
2016-01-15 6:55 ` [PATCH v2 15/16] XEN: EFI: Move x86 specific codes to architecture directory Shannon Zhao
2016-01-15 6:55 ` [PATCH v2 16/16] ARM64: XEN: Initialize Xen specific UEFI runtime services Shannon Zhao
2016-01-18 11:08 ` Mark Rutland
2016-01-18 17:45 ` Stefano Stabellini
2016-01-18 18:27 ` Mark Rutland
2016-01-19 12:03 ` Stefano Stabellini
2016-01-19 13:03 ` Mark Rutland
2016-01-19 13:31 ` Shannon Zhao
2016-01-19 14:20 ` Stefano Stabellini
2016-01-18 17:03 ` [Xen-devel] " Stefano Stabellini
2016-01-19 13:12 ` Shannon Zhao
2016-01-19 14:24 ` Stefano Stabellini
2016-01-22 3:58 ` Shannon Zhao
2016-01-22 10:57 ` Stefano Stabellini
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