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xen-devel
Re: [Xen-devel] [PATCH 0/3] x2APIC improvement
Konrad Rzeszutek Wilk wrote:
On Mon, Jul 05, 2010 at 03:07:58PM +0800, Han, Weidong wrote:
The patchset improves Xen x2APIC support.
Patch 1/3: allocate iommu when create a drhd
A drhd is created when parse ACPI DMAR table, but drhd->iommu is not
allocated until iommu setup. But iommu is needed by x2APIC which will enable interrupt
remapping before iommu setup. This patch allocates iommu when create drhd. And then
drhd->ecap can be removed because it's the same as iommu->ecap.
Have these patches been tested on a machine where the number of DRHD !=
number of IOAPICs?
Why need to care about number of DRHD != number of IOAPICs? One DRHD may
cover more than one IOAPICs. And there is already check if all IOAPICs
have corresponding DRHD.
Regards,
Weidong
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