[PATCH v4 0/1] Implements MMIO emulation for lvx/stvx instructions

[Jose Ricardo Ziviani <joserz@linux.vnet.ibm.com>]

v4:
  - Changed KVM_MMIO_REG_VMX to 0xc0 because there are 64 VSX registers

v3:
  - Added Reported-by in the commit message

v2:
  - kvmppc_get_vsr_word_offset() moved back to its original place
  - EA AND ~0xF, following ISA.
  - fixed BE/LE cases

TESTS:

For testing purposes I wrote a small program that performs stvx/lvx using the
program's virtual memory and using MMIO. Load/Store into virtual memory is the
model I use to check if MMIO results are correct (because only MMIO is emulated
by KVM).

Results:

HOST LE - GUEST BE
address: 0x10034850010
0x21436587bbbbaaaa4444555578563412
io_address: 0x3fff89a20000
0x21436587bbbbaaaa4444555578563412

HOST LE - GUEST LE
address: 0x10033a20010
0x1234567855554444aaaabbbb87654321
io_address: 0x3fffb5380000
0x1234567855554444aaaabbbb87654321

HOST BE - GUEST BE
address: 0x1002c4a0010
0x21436587bbbbaaaa4444555578563412
io_address: 0x3ffface40000
0x21436587bbbbaaaa4444555578563412

HOST BR - GUEST LE
address: 0x100225e0010
0x1234567855554444aaaabbbb87654321
io_address: 0x3fff7fcb0000
0x1234567855554444aaaabbbb87654321

This patch implements MMIO emulation for two instructions: lvx and stvx.

Jose Ricardo Ziviani (1):
  KVM: PPC: Book3S: Add MMIO emulation for VMX instructions

 arch/powerpc/include/asm/kvm_host.h   |   2 +
 arch/powerpc/include/asm/kvm_ppc.h    |   4 +
 arch/powerpc/include/asm/ppc-opcode.h |   6 ++
 arch/powerpc/kvm/emulate_loadstore.c  |  34 ++++++++
 arch/powerpc/kvm/powerpc.c            | 153 +++++++++++++++++++++++++++++++++-
 5 files changed, 198 insertions(+), 1 deletion(-)

-- 
2.14.3