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# Date Author Comment
7d77793d 01/04/2012 03:48 am Alexander Graf

s390x: add TR function for EXECUTE

Newer gcc versions (or glibc?) also generate code that tries to EXECUTE
the TR opcode. Implement it so that we don't break valid guests.

Reported-by: Andreas Faerber <>
Signed-off-by: Alexander Graf <>
3a93113a 12/06/2011 11:56 am Dong Xu Wang

fix typo: delete redundant semicolon

Double semicolons should be single.

Signed-off-by: Dong Xu Wang <>
Signed-off-by: Stefan Hajnoczi <>
27b5979d 11/14/2011 06:47 pm Alexander Graf

s390x: add ldeb instruction

While running perl, we encountered the ldeb instruction to be used,
so we implement it :).

Signed-off-by: Alexander Graf <>
09ed75f7 11/14/2011 06:47 pm Alexander Graf

s390x: make ipte 31-bit aware

When running 31-bit code we can potentially map the same virtual
address twice - once as 0x0yyyyyyy and once as 0x8yyyyyyy, because
the upper bit gets ignored.

This also should be reflected in the tlb invalidation path, so we...
b9959138 11/14/2011 06:47 pm Alexander Graf

s390x: update R and C bits in storage key

When the s390x maps a page or writes happen to a page, the R and C
bits get updated. The easiest way to implement this in qemu is to
simply update them whenever we map a TLB translation and act according
to the permissions....
17bb18ce 11/14/2011 06:47 pm Alexander Graf

s390x: implement rrbe instruction properly

The rrbe instruction resets the reference bit in the given storage key.
So far, we merely made it a nop and also returned an invalid CC value,
so that the kernel never knew if a page actually got accessed.

This patch implements it properly, flushing the R bit and returning the...
1864b94a 11/14/2011 06:47 pm Alexander Graf

s390x: implement SIGP restart and shutdown

An s390x OS does reboot and shutdown triggers through hypercalls that
we didn't implement on the TCG backend yet. That means that so far we
couldn't shut down virtual machines for example, having them hang on
shutdown when not using KVM....
bccd9ec5 10/01/2011 12:31 pm Blue Swirl

softmmu_header: pass CPUState to tlb_fill

Pass CPUState pointer to tlb_fill() instead of architecture local
cpu_single_env hacks.

Signed-off-by: Blue Swirl <>
97b348e7 08/07/2011 12:32 pm Blue Swirl

Remove unused is_softmmu parameter from cpu_handle_mmu_fault

Parameter is_softmmu (and its evil mutant twin brother is_softmuu)
is not used in cpu_*_handle_mmu_fault() functions, remove them
and adjust callers.

Acked-by: Richard Henderson <>...
3e457172 07/30/2011 12:41 pm Blue Swirl

exec.h cleanup

Move softmmu_exec.h include directives from target-*/exec.h to
target-*/op_helper.c. Move also various other stuff only used in
op_helper.c there.

Define global env in dyngen-exec.h.

For i386, move wrappers for segment and FPU helpers from user-exec.c...
1162c041 06/26/2011 09:25 pm Blue Swirl

cpu_loop_exit: avoid using AREG0

Make cpu_loop_exit() take a parameter for CPUState instead of relying
on global env.

Signed-off-by: Blue Swirl <>
af2be207 06/26/2011 08:35 pm Jan Kiszka

Fix fallouts from Linux header inclusion

This is an all-in-one fix for the smaller and bigger mistakes of the
build system changes for accompanied Linux headers:
- only enable KVM and vhost on Linux hosts
- fix powerpc asm header symlink
- do not use Linux headers on non-Linux hosts...
e205c790 06/20/2011 09:16 pm Jan Kiszka

Switch build system to accompanied kernel headers

This helps reducing our build-time checks for feature support in the
available Linux kernel headers. And it helps users that do not have
sufficiently recent headers installed on their build machine.

Consequently, the patch removes and build-time checks for kvm and vhost...
5b185639 06/03/2011 02:34 pm Alexander Graf

s390x: fix cksm instruction

The cksm instruction was implemented incorrectly, rendering UDP and TCP
checksum calculation wrong, making an emulated s390x Linux guest break
in most networking operations.

This patch fixes odd end checksum calculation, takes the input register...
22486aa0 05/20/2011 06:35 pm Christian Borntraeger

s390x: fix memory detection for guests > 64GB

the s390 memory detection has a 16bit field that specifies the amount of
increments. This patch adopts the memory size to always fit into that
scheme. This also fixes virtio detection for these guests, since the...
d5a43964 05/20/2011 06:35 pm Alexander Graf

s390x: helper functions for system emulation

When running system emulation, we need to transverse through the MMU and
deliver interrupts according to the specification.

This patch implements those two pieces and in addition adjusts the CPU
initialization code to account for the new fields in CPUState....
defb0e31 05/20/2011 06:35 pm Alexander Graf

s390x: Implement opcode helpers

There are some instructions that can't (or shouldn't) be expressed by pure
tcg code. For those, we call into externally compiled C functions.

This patch implements those C functions.

Signed-off-by: Alexander Graf <>
618ba8e6 04/20/2011 11:37 am Stefan Weil

Remove unused function parameter from cpu_restore_state

The previous patch removed the need for parameter puc.
Is is now unused, so remove it.

Cc: Aurelien Jarno <>
Reviewed-by: Peter Maydell <>
Signed-off-by: Stefan Weil <>
70539e18 03/07/2010 05:48 pm Blue Swirl

Update to a hopefully more future proof FSF address

See also 8167ee883931cb20c6264fc19d040ce2dc6ceaaa,
530e7615ce3c01882e582c84dc6304ab98a3d5c5 and
fad6cb1a565bb73f83fc0e2654489457b489e436.

Signed-off-by: Blue Swirl <>
10ec5117 12/05/2009 06:36 pm Alexander Graf

S/390 CPU fake emulation

Because Qemu currently requires a TCG target to exist and there are quite some
useful helpers here to lay the groundwork for out KVM target, let's create a
stub TCG emulation target for S390X CPUs.

This is required to make tcg happy. The emulation target itself won't work...