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Re: [Qemu-devel] [RFC PATCH v2 09/11] hw/arm/virt-acpi-build: Generate X
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From: |
Laszlo Ersek |
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Subject: |
Re: [Qemu-devel] [RFC PATCH v2 09/11] hw/arm/virt-acpi-build: Generate XSDT table |
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Date: |
Tue, 03 Feb 2015 17:51:17 +0100 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.4.0 |
On 02/03/15 17:19, Igor Mammedov wrote:
> On Thu, 29 Jan 2015 16:37:11 +0800
> Shannon Zhao <address@hidden> wrote:
>
>> XDST points to other tables except FACS & DSDT.
> Is there any reason to use XSDT instead of RSDT?
> If ACPI tables are below 4Gb which probably would
> be the case then RSDT could be used just fine and
> we could share more code between x86 and ARM.
>
> Laszlo,
> Do you know if OVMF allocates memory below 4G address range?
Yes, it does.
https://github.com/tianocore/edk2/blob/master/OvmfPkg/AcpiPlatformDxe/QemuFwCfgAcpi.c#L162
RSDT should suffice.
Thanks,
Laszlo