linux-user: Fake /proc/cpuinfo

Fedora 17 for ARM reads /proc/cpuinfo and fails if it doesn't contain
ARM related contents. This patch implements a quick hack to expose real
/proc/cpuinfo data taken from a real world machine.

The real fix would be to generate at least the flags automatically based
on the selected CPU. Please do not submit this patch upstream until this
has happened.

Signed-off-by: Alexander Graf <agraf@suse.de>
[AF: Rebased for v1.6]
Signed-off-by: Andreas Färber <afaerber@suse.de>
linux-user: implement FS_IOC_GETFLAGS ioctl

Signed-off-by: Alexander Graf <agraf@suse.de>

---

v1 -> v2:

  - use TYPE_LONG instead of TYPE_INT
linux-user: implement FS_IOC_SETFLAGS ioctl

Signed-off-by: Alexander Graf <agraf@suse.de>

---

v1 -> v2

  - use TYPE_LONG instead of TYPE_INT
linux-user: XXX disable fiemap

agraf: fiemap breaks in libarchive. Disable it for now.
slirp: -nooutgoing

TBD (from SUSE Studio team)
vnc: password-file= and incoming-connections=

TBD (from SUSE Studio team)
linux-user: add more blk ioctls

Implement a few more ioctls that operate on block devices.

Signed-off-by: Alexander Graf <agraf@suse.de>
linux-user: use target_ulong

Linux syscalls pass pointers or data length or other information of that sort
to the kernel. This is all stuff you don't want to have sign extended.
Otherwise a host 64bit variable parameter with a size parameter will extend
it to a negative number, breaking lseek for example.

Pass syscall arguments as ulong always.

Signed-off-by: Alexander Graf <agraf@suse.de>
Add support for DictZip enabled gzip files

DictZip is an extension to the gzip format that allows random seeks in gzip
compressed files by cutting the file into pieces and storing the piece offsets
in the "extra" header of the gzip format.

Thanks to that extension, we can use gzip compressed files as block backend,
though only in read mode.

This makes a lot of sense when stacked with tar files that can then be shipped
to VM users. If a VM image is inside a tar file that is inside a DictZip
enabled gzip file, the user can run the tar.gz file as is without having to
extract the image first.

Tar patch follows.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Bruce Rogers <brogers@novell.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
[TH: Use bdrv_open options instead of filename]
Signed-off-by: Tim Hardeck <thardeck@suse.de>
Signed-off-by: Andreas Färber <afaerber@suse.de>
Add tar container format

Tar is a very widely used format to store data in. Sometimes people even put
virtual machine images in there.

So it makes sense for qemu to be able to read from tar files. I implemented a
written from scratch reader that also knows about the GNU sparse format, which
is what pigz creates.

This version checks for filenames that end on well-known extensions. The logic
could be changed to search for filenames given on the command line, but that
would require changes to more parts of qemu.

The tar reader in conjunctiuon with dzip gives us the chance to download
tar'ed up virtual machine images (even via http) and instantly make use of
them.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Bruce Rogers <brogers@novell.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
[TH: Use bdrv_open options instead of filename]
Signed-off-by: Tim Hardeck <thardeck@suse.de>
Signed-off-by: Andreas Färber <afaerber@suse.de>
Legacy Patch kvm-qemu-preXX-dictzip3.patch
Legacy Patch kvm-qemu-preXX-report-default-mac-used.patch
console: add question-mark escape operator

Some termcaps (found using SLES11SP1) use [? sequences. According to man
console_codes (http://linux.die.net/man/4/console_codes) the question mark
is a nop and should simply be ignored.

This patch does exactly that, rendering screen output readable when
outputting guest serial consoles to the graphical console emulator.

Signed-off-by: Alexander Graf <agraf@suse.de>
Make char muxer more robust wrt small FIFOs

Virtio-Console can only process one character at a time. Using it on S390
gave me strage "lags" where I got the character I pressed before when
pressing one. So I typed in "abc" and only received "a", then pressed "d"
but the guest received "b" and so on.

While the stdio driver calls a poll function that just processes on its
queue in case virtio-console can't take multiple characters at once, the
muxer does not have such callbacks, so it can't empty its queue.

To work around that limitation, I introduced a new timer that only gets
active when the guest can not receive any more characters. In that case
it polls again after a while to check if the guest is now receiving input.

This patch fixes input when using -nographic on s390 for me.
linux-user: lseek: explicitly cast non-set offsets to signed

When doing lseek, SEEK_SET indicates that the offset is an unsigned variable.
Other seek types have parameters that can be negative.

When converting from 32bit to 64bit parameters, we need to take this into
account and enable SEEK_END and SEEK_CUR to be negative, while SEEK_SET stays
absolute positioned which we need to maintain as unsigned.

Signed-off-by: Alexander Graf <agraf@suse.de>
virtfs-proxy-helper: Provide __u64 for broken sys/capability.h

Fixes the build on SLE 11 SP2.

[AF: Extend to ppc64]