pc-bios/s390-ccw: virtio_load_direct() can't load max number of sectors

The number of sectors to read is given by the last 16 bit of rec_list2.
1 is added in order to get to the real number of sectors to read (0x0000
-> read 1 block). For now, the maximum number (0xffff) led to 0 sectors
being read.

This fixes a bug where a large initrd (62MB) could not be ipled anymore.

Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
pc-bios/s390-ccw: do a subsystem reset before running the guest

The loader BIOS has already activated several devices. Let's do a
subsystem reset before jumping into the guest. As there is no direct
way of doing so, we use diagnose 308 to bring the system in a
defined state. This is similar to what kdump on s390 uses. We have
to define a small trampoline function that restores the low bytes
to whatever the bootmap has written there.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Reviewed-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
pc-bios/s390-ccw: fix for fragmented SCSI bootmap

We need to interpret the last entry of the bootmap with zero
block count as "continuation pointer".
The "last entry" is being detected by pre-filling of the scratch
space with known values and respective look-ahead.

Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Tested-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
pc-bios/s390-ccw: update s390-ccw.img binary

Update s390-ccw.img to match with latest fixes

Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
tcg-ppc: Use uintptr_t in ppc_tb_set_jmp_target

Tested-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Richard Henderson <rth@twiddle.net>
tcg-ppc64: Avoid some hard-codings of TCG_TYPE_I64

Using more appropriate _PTR or _REG where possible.

Tested-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Richard Henderson <rth@twiddle.net>
tcg-ppc64: Move functions around

Code movement only.  This will allow us to make use of the
other tcg_out_* functions in tidying their implementations.

Tested-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Richard Henderson <rth@twiddle.net>
tcg-ppc64: Relax register restrictions in tcg_out_mem_long

In order to be able to use tcg_out_ld/st sensibly with scratch
registers, assert only when we'd incorrectly clobber a scratch.

Tested-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Richard Henderson <rth@twiddle.net>
tcg-ppc64: Use tcg_out_{ld,st,cmp} internally

Rather than using tcg_out32 and opcodes directly.  This allows us
to remove LD_ADDR and CMP_L macros.

Tested-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Richard Henderson <rth@twiddle.net>
tcg-ppc64: Make TCG_AREG0 and TCG_REG_CALL_STACK enum constants

Tested-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Richard Henderson <rth@twiddle.net>
tcg-ppc64: Move call macros out of tcg-target.h

These values are private to tcg.c; we don't need to expose
this nonsense to the translators.

Tested-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Richard Henderson <rth@twiddle.net>
tcg-ppc64: Fix TCG_TARGET_CALL_STACK_OFFSET

The calling convention reserves space for the 8 register parameters on
the stack, so using only 6*8=48 as the offset was wrong.  We never saw
this bug because we don't have any helpers with more than 5 parameters.

Tested-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Richard Henderson <rth@twiddle.net>
tcg-ppc64: Better parameterize the stack frame

In preparation for supporting other ABIs.

Tested-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Richard Henderson <rth@twiddle.net>
tcg-ppc64: Use the correct test in tcg_out_call

The correct test uses the _CALL_AIX macro, not a host-specific macro.

Tested-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Richard Henderson <rth@twiddle.net>
tcg-ppc64: Support the ppc64 elfv2 ABI

Tested-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Richard Henderson <rth@twiddle.net>
tcg-ppc64: Adjust tcg_out_call for ELFv2

The new ELFv2 ABI, used by default on powerpc64le-linux hosts,
introduced some changes that are incompatible with code currently
generated by the ppc64 TGC target.  In particular, we no longer
use function descriptors.

This patch adds support for the ELFv2 ABI in the ppc64 TGC
function call and function prologue sequences.

Tested-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Ulrich Weigand <ulrich.weigand@de.ibm.com>
Signed-off-by: Richard Henderson <rth@twiddle.net>
tcg-ppc64: Merge 32-bit ABIs into the prologue / frame code

Tested-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Richard Henderson <rth@twiddle.net>
tcg-ppc64: Fix sub2 implementation

All sorts of confusion on argument ordering.

Tested-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Richard Henderson <rth@twiddle.net>
tcg-ppc64: Begin merging ppc32 with ppc64

Just enough to compile, assuming you edit config-host.mak manually.
It will still abort at runtime, due to missing brcond2, setcond2, mulu2.

Tested-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Richard Henderson <rth@twiddle.net>
tcg-ppc64: Merge ppc32 brcond2, setcond2, muluh

Now passes tcg_add_target_add_op_defs assertions, but
not complete enough to function.

Tested-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Richard Henderson <rth@twiddle.net>