Changing the default IO timeout to 5 s (#5578) made a race visible
between the alarm_timer and select() in main_loop_wait(): If the timer
fired before select was able to block, the full select() timeout could
have been applied instead of returning immediately. Since #5578, this
causes heavy problems to the Musicpal board emulation with stalls up to
5 s, but also with some older Linux guest kernels.
The following patch introduces a pipe that is written to by
host_alarm_handler and select()'ed in main_loop_wait(). This avoids
prevents that select() blocks though a timer has fired and waits for
processing.
Signed-off-by: Jan Kiszka <jan.kiszka@web.de>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5633 c046a42c-6fe2-441c-8c8c-71466251a162
This patch adds minimum emulation of SM501 multifunction device,
whose main feature is 2D graphics. It is one of the peripheral
of R2D, the SH4 evaluation board. We can see TUX printed on the
QEMU console.
Signed-off-by: Shin-ichiro KAWASAKI <kawasaki@juno.dti.ne.jp>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5632 c046a42c-6fe2-441c-8c8c-71466251a162
Inspired by a patch from Glauber Costa.
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5631 c046a42c-6fe2-441c-8c8c-71466251a162
This allows a user to override the default search path and also makes cross
compilation work a bit nicer wrt KVM detection.
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5628 c046a42c-6fe2-441c-8c8c-71466251a162
This patch adds very basic KVM support. KVM is a kernel module for Linux that
allows userspace programs to make use of hardware virtualization support. It
current supports x86 hardware virtualization using Intel VT-x or AMD-V. It
also supports IA64 VT-i, PPC 440, and S390.
This patch only implements the bare minimum support to get a guest booting. It
has very little impact the rest of QEMU and attempts to integrate nicely with
the rest of QEMU.
Even though this implementation is basic, it is significantly faster than TCG.
Booting and shutting down a Linux guest:
w/TCG: 1:32.36 elapsed 84% CPU
w/KVM: 0:31.14 elapsed 59% CPU
Right now, KVM is disabled by default and must be explicitly enabled with
-enable-kvm. We can enable it by default later when we have had better
testing.
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5627 c046a42c-6fe2-441c-8c8c-71466251a162
KVM needs to call CPUID from outside of the TCG code. This patch
splits out the CPUID logic into a separate helper that both the op
helper and KVM can call.
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5626 c046a42c-6fe2-441c-8c8c-71466251a162
Some x86 CPU definitions that KVM needs
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5625 c046a42c-6fe2-441c-8c8c-71466251a162
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5624 c046a42c-6fe2-441c-8c8c-71466251a162
cpu_interrupt might be called while translating the TB, but before it
is linked into a potentially infinite loop and becomes env->current_tb.
Currently this can (and does) cause huge problems only when using
dyntick clock, with other (periodic) clocks host_alarm_handler will
eventually be executed resulting in a call to cpu_interrupt which will
reset the recursion of running TB and the damage is "only" latency.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5620 c046a42c-6fe2-441c-8c8c-71466251a162
Use the same order as the _i32 version (pure code move). Suggested by
Laurent Laurent Desnogues.
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5606 c046a42c-6fe2-441c-8c8c-71466251a162
This patch fixes the misinterpretaion of the transparency bit for
RGBT 5:5:5 mode on pxa2xx LCDC.
Signed-off-by: Lars Munch <lars@segv.dk>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5605 c046a42c-6fe2-441c-8c8c-71466251a162
Add a subfi (subtract from immediate) wrapper, useful for the PPC target.
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5599 c046a42c-6fe2-441c-8c8c-71466251a162
Move addi_i64, muli_i64 and subi_i64 out of #if TCG_TARGET_REG_BITS
as both implementations are strictly identical. Use the same
optimisation (ie when imm == 0) for addi_i64 and subi_64 than the
32-bit version.
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5598 c046a42c-6fe2-441c-8c8c-71466251a162
Revision 5500 of the qemu repository removed all code using
ppc_load_xer & ppc_store_xer as well as their implementation.
Another patch fixes it's usage in kvm-userspace for powerpc, but I think
that header can now be cleaned up, therefore this patch to qemu-devel.
Signed-off-by: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5589 c046a42c-6fe2-441c-8c8c-71466251a162
The code in hw/cirrus_vga.c has changed a lot between CVE-2007-1320 has
been announced and the patch has been applied. As a consequence it has
wrongly applied and QEMU is still vulnerable to this bug if using VNC.
(noticed by Jan Niehusmann)
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5587 c046a42c-6fe2-441c-8c8c-71466251a162
aliguori