This gets the PC right after an arithmetic exception.  Also tidies
the code in the TLB fault handlers to use common code.
Signed-off-by: NRichard Henderson <rth@twiddle.net>

Introduce and use arith_excp, filling in the trap_arg[01] IPRs.
Signed-off-by: NRichard Henderson <rth@twiddle.net>

There's no need to attempt to match EXCP_* values with PALcode entry
point offsets.  Instead, compress all the values to make for more
efficient switch statements within QEMU.

We will be doing TLB fill within QEMU proper, not within the PALcode,
so all of the ITB/DTB miss, double fault, and access exceptions can
be compressed to EXCP_MMFAULT.

Compress all of the EXCP_CALL_PAL exceptions into one.
Use env->error_code to store the specific entry point.
Signed-off-by: NRichard Henderson <rth@twiddle.net>

With all of the pre-existing code that would not compile gone,
this is the earliest point at which the target can be enabled.

There is no machine defined yet, so this will crash on startup.
Enable the target anyway, to make sure that further compilation
problems do not creep back in.
Signed-off-by: NRichard Henderson <rth@twiddle.net>

Delete all the code that tried to emulate the real IPRs of some
unnamed CPU.  Replace those with just 3 slots that we can use to
communicate trap information between the helper functions that
signal exceptions and the OS trap handler.
Signed-off-by: NRichard Henderson <rth@twiddle.net>

Signed-off-by: NRichard Henderson <rth@twiddle.net>

Don't bother including executive and supervisor modes.
Signed-off-by: NRichard Henderson <rth@twiddle.net>

This code contained typos, as it had never been compiled.
Signed-off-by: NRichard Henderson <rth@twiddle.net>

All of the "raw" memory accesses should be "phys" instead.  Fix
some confusion about argument ordering of the store routines.
Fix the implementation of store-conditional.

Delete the "alt-mode" helpers.  Because we only implement two
mmu modes, let /a imply user-mode unconditionally.

Leave some combinations of virt access without permission
checks as unimplemented.  There are too many hoops through
which to jump, and these insns will not be needed in the
emulation palcode.
Signed-off-by: NRichard Henderson <rth@twiddle.net>

This code does not work, and will be replaced by a bios image.
Signed-off-by: NRichard Henderson <rth@twiddle.net>

We were failing to generate EXC_DEBUG in the EXIT_PC_UPDATED path.
This caused us not to stop at the instruction after a branch, but
on the instruction afterward.
Signed-off-by: NRichard Henderson <rth@twiddle.net>

The QEMU emulation PALcode will use EV6 PALcode insns regardless
of the "real" cpu instruction set being emulated.
Signed-off-by: NRichard Henderson <rth@twiddle.net>

I've been maintaining this port for a while now.
Signed-off-by: NRichard Henderson <rth@twiddle.net>

Conflicts:
	hw/usb-msd.c

Signed-off-by: NStefan Weil <weil@mail.berlios.de>
Signed-off-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com>

Thanks to Tobias Hoffmann <th55@gmx.de> for this patch.
Signed-off-by: NStefan Weil <weil@mail.berlios.de>
Signed-off-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com>

After NACKing a read operation, a raising SCL should not trigger a new
read from the slave.  Introduce a new state which just waits for a stop
or start condition after NACK.
Signed-off-by: NMarcus Comstedt <marcus@mc.pp.se>
Signed-off-by: NAndrzej Zaborowski <andrew.zaborowski@intel.com>

Simplify cpu-exec.c by refactoring.
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

There is little in common with user and softmmu versions of cpu_resume_signal(),
split them.

Fix coding style for the user emulator part.
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

Signed-off-by: NMarkus Armbruster <armbru@redhat.com>
Signed-off-by: NAmit Shah <amit.shah@redhat.com>

Signed-off-by: NMarkus Armbruster <armbru@redhat.com>
Signed-off-by: NAmit Shah <amit.shah@redhat.com>

All you could ever achieve with it is break stuff, so removing it
should be safe.
Signed-off-by: NMarkus Armbruster <armbru@redhat.com>
Signed-off-by: NAmit Shah <amit.shah@redhat.com>

virtio-serial-bus needs to treat "virtconsole" devices specially.  It
uses VirtIOSerialPort member is_console to recognize them.  It gets
its value via property initialization.  Cute hack, except it lets
users mess with it: "-device virtconsole,is_console=0" isn't plugged
into port 0 as it should.

Move the flag to VirtIOSerialPortInfo.  Keep the property for backward
compatibility; its value has no effect.
Signed-off-by: NMarkus Armbruster <armbru@redhat.com>
Signed-off-by: NAmit Shah <amit.shah@redhat.com>

virtio_serial_init() allocates the VirtIOSerialBus dynamically, but
virtio_serial_exit() doesn't free it.

Fix by getting rid of the allocation.
Signed-off-by: NMarkus Armbruster <armbru@redhat.com>
Signed-off-by: NAmit Shah <amit.shah@redhat.com>

Instead of calling flush_queued_data when unthrottling, schedule
a bh. That way we can return immediately to the caller, and the
flush uses the same call path as a have_data for callbackee.

No migration change is required because bh are called from vm_stop.
Signed-off-by: NAlon Levy <alevy@redhat.com>
Signed-off-by: NAmit Shah <amit.shah@redhat.com>

The LUN field in the CDB is a historical relic.  Ignore it as reserved,
which is what modern SCSI specifications actually say.
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
Reviewed-by: NChristoph Hellwig <hch@lst.de>

Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>

Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>

This mirrors the LSI patch that was recently committed.
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>

The sg driver currently has a hardcoded limit of commands it
can handle simultaneously. When this limit is reached the
driver will return -EDOM. So we need to capture this to
enable proper return values here.
Signed-off-by: NHannes Reinecke <hare@suse.de>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
Reviewed-by: NChristoph Hellwig <hch@lst.de>

The return value is unused anyway.
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
Reviewed-by: NChristoph Hellwig <hch@lst.de>

scsi_req_parse() already provides for a data direction setting,
so we should be using it to check for correct direction.
And we should return the sense code 'INVALID FIELD IN CDB'
in these cases.
Signed-off-by: NHannes Reinecke <hare@suse.de>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
Reviewed-by: NChristoph Hellwig <hch@lst.de>

The get_sense callback copies existing sense information into
the provided buffer. This is required if sense information
should be transferred together with the command response.
Signed-off-by: NHannes Reinecke <hare@suse.de>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
Reviewed-by: NChristoph Hellwig <hch@lst.de>

... and remove some SCSIDevice variables or fields that now become unused.
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
Reviewed-by: NChristoph Hellwig <hch@lst.de>

Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>

Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
Reviewed-by: NChristoph Hellwig <hch@lst.de>

Move the common part of scsi-disk.c and scsi-generic.c to the SCSI layer.
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
Reviewed-by: NChristoph Hellwig <hch@lst.de>