KVM: PPC: Book3S HV: Use ASDR for HPT guests on POWER9
authorPaul Mackerras <paulus@ozlabs.org>
Mon, 30 Jan 2017 10:21:43 +0000 (21:21 +1100)
committerMichael Ellerman <mpe@ellerman.id.au>
Tue, 31 Jan 2017 08:11:48 +0000 (19:11 +1100)
commitef8c640cb9cc865a461827b698fcc55b0ecaa600
treecde96714034e9e9953e5095b42233317db106ed1
parent468808bd35c4aa3cf7d9fde0ebb010270038734b
KVM: PPC: Book3S HV: Use ASDR for HPT guests on POWER9

POWER9 adds a register called ASDR (Access Segment Descriptor
Register), which is set by hypervisor data/instruction storage
interrupts to contain the segment descriptor for the address
being accessed, assuming the guest is using HPT translation.
(For radix guests, it contains the guest real address of the
access.)

Thus, for HPT guests on POWER9, we can use this register rather
than looking up the SLB with the slbfee. instruction.

Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
arch/powerpc/kvm/book3s_hv_rmhandlers.S