linux-stable.git/arch/powerpc/include/asm/ppc-opcode.h, branch linux-3.6.y

powerpc: Enforce usage of RA 0-R31 where possible

2012-07-10T09:18:35+00:00

Some macros use RA where when RA=R0 the values is 0, so make this
the enforced mnemonic in the macro.

Idea suggested by Andreas Schwab.

Signed-off-by: Michael Neuling 
Signed-off-by: Benjamin Herrenschmidt

powerpc: Add defines for RA 0-R31

2012-07-10T09:18:33+00:00

R0 is special since it'll be 0.

Signed-off-by: Michael Neuling 
Signed-off-by: Benjamin Herrenschmidt

powerpc: Enforce usage of R0-R31 where possible

2012-07-10T09:18:30+00:00

Enforce the use of R0-R31 in macros where possible now we have all the
fixes in.

R0-R31 macros are removed here so that can't be used anymore.  They
should not be defined anywhere.

Signed-off-by: Michael Neuling 
Signed-off-by: Benjamin Herrenschmidt

powerpc: Introduce new __REG_R macros

2012-07-10T09:18:27+00:00

Signed-off-by: Michael Neuling 
Signed-off-by: Benjamin Herrenschmidt

powerpc: Start using ___PPC_RA/B/S/T where necessary

2012-07-10T09:18:25+00:00

Now have ___PPC_RA/B/S/T we can use it in some places.  These are
places where we can't use the existing defines which will soon enforce
R0-R31 usage.

The macros being changed here are being used in inline asm, which
can't convert to enforce the R0-R31 usage.

bpf_jit uses a mix of both generated and non-generated with the same
code, so just convert all these to use the ___PPC_R versions which
won't enforce R usage later.

Signed-off-by: Michael Neuling 
Signed-off-by: Benjamin Herrenschmidt

powerpc: Introduce new ___PPC_RA/B/S/T macros

2012-07-10T09:18:22+00:00

These are currently the same as __PPC_RA/B/S/T but we'll wrap them
soon.

Signed-off-by: Michael Neuling 
Signed-off-by: Benjamin Herrenschmidt

powerpc: Fix VSX macros so register names aren't wrapped

2012-07-10T09:18:19+00:00

We need to do this so we can enforce the name of a and b in called
macros PPC_RA/B later.

Signed-off-by: Michael Neuling 
Signed-off-by: Benjamin Herrenschmidt

powerpc/pasemi: Move lbz/stbciz to ppc-opcode.h

2012-07-10T09:18:00+00:00

move lbz/stbciz to ppc-opcode.h.

Signed-off-by: Michael Neuling 
Signed-off-by: Benjamin Herrenschmidt

powerpc: Add defines for R0-R31

2012-07-10T09:17:50+00:00

We are going to use these later and convert r0 to %r0 etc.

Signed-off-by: Michael Neuling 
Signed-off-by: Benjamin Herrenschmidt

KVM: PPC: Implement MMIO emulation support for Book3S HV guests

2012-03-05T12:52:37+00:00

This provides the low-level support for MMIO emulation in Book3S HV
guests.  When the guest tries to map a page which is not covered by
any memslot, that page is taken to be an MMIO emulation page.  Instead
of inserting a valid HPTE, we insert an HPTE that has the valid bit
clear but another hypervisor software-use bit set, which we call
HPTE_V_ABSENT, to indicate that this is an absent page.  An
absent page is treated much like a valid page as far as guest hcalls
(H_ENTER, H_REMOVE, H_READ etc.) are concerned, except of course that
an absent HPTE doesn't need to be invalidated with tlbie since it
was never valid as far as the hardware is concerned.

When the guest accesses a page for which there is an absent HPTE, it
will take a hypervisor data storage interrupt (HDSI) since we now set
the VPM1 bit in the LPCR.  Our HDSI handler for HPTE-not-present faults
looks up the hash table and if it finds an absent HPTE mapping the
requested virtual address, will switch to kernel mode and handle the
fault in kvmppc_book3s_hv_page_fault(), which at present just calls
kvmppc_hv_emulate_mmio() to set up the MMIO emulation.

This is based on an earlier patch by Benjamin Herrenschmidt, but since
heavily reworked.

Signed-off-by: Paul Mackerras 
Signed-off-by: Alexander Graf 
Signed-off-by: Avi Kivity