xen/privcmd: Add support for Linux 64KB page granularity

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The hypercall interface (as well as the toolstack) is always using 4KB
page granularity. When the toolstack is asking for mapping a series of
guest PFN in a batch, it expects to have the page map contiguously in
its virtual memory.

When Linux is using 64KB page granularity, the privcmd driver will have
to map multiple Xen PFN in a single Linux page.

Note that this solution works on page granularity which is a multiple of
4KB.

Signed-off-by: Julien Grall <julien.grall@citrix.com>
Reviewed-by: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>

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Julien Grall 2015-05-05 16:54:12 +01:00 • committed by David Vrabel

parent d0089e8a0e

commit 5995a68a62

2 changed files with 89 additions and 43 deletions

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8

drivers/xen/privcmd.c

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124

drivers/xen/xlate_mmu.c

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