David Gibson dbcf929c00 powerpc/pseries: Add support for hash table resizing ... This adds support for using two hypercalls to change the size of the main hash page table while running as a PAPR guest. For now these hypercalls are only in experimental qemu versions. The interface is two part: first H_RESIZE_HPT_PREPARE is used to allocate and prepare the new hash table. This may be slow, but can be done asynchronously. Then, H_RESIZE_HPT_COMMIT is used to switch to the new hash table. This requires that no CPUs be concurrently updating the HPT, and so must be run under stop_machine(). This also adds a debugfs file which can be used to manually control HPT resizing or testing purposes. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Reviewed-by: Paul Mackerras <paulus@samba.org> [mpe: Rename the debugfs file to "hpt_order"] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>		2017-02-10 13:27:55 +11:00
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asm	powerpc/pseries: Add support for hash table resizing	2017-02-10 13:27:55 +11:00
uapi/asm	powerpc: Add new cache geometry aux vectors	2017-02-06 19:46:04 +11:00