For 32-bit build of Xen:
1) the first mismatch (in hpet_read(), length is 4) makes guest think
the HPET DM is buggy (we return 0 for HPET_CFG.COUNTER_CLK_PERIOD to
guest), so guest wouldn't use HPET at all.
2) the second one: if tmict is 62500000 and timer_divisor is 16
(Fedoar7's installer uses the values at some time), 10 * 62500000 * 16
= 0x2540BE400 -- it's too big to be held in uint32_t.
Signed-off-by: Dexuan Cui <dexuan.cui@intel.com>=20
The CrashMe stress test (a process repeatedly forks child processes, and
the child processes initialize a buffer with random numbers, then treat
the buffer as code, and execute it) can crash 32-bit HVM RHEL5.1 guest
easily; this is because we haven't emulated all the instructions in
handle_mmio() yet.
The CrashMe process runs with root rights, and can access MMIO space in
an unknown way ("strace -f" shows the random codes running at CPL=3D3
don't call mmap(), and don't open any special files in /dev/ "); the gpa
may look like 0xa**** or 0xb****, or 0xfee0****. =20
Signed-off-by: Dexuan Cui <dexuan.cui@intel.com>
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
Add a semaphore to protect gnttab_list from exhaustion, and disable
callbacks during allocation/free. Fix the network frontend accordingly.
Signed-off-by: Samuel Thibault <samuel.thibault@citrix.com>
This patch modifies domain id in __iommu_flush_context() and
__iommu_flush_iotlb() to be consistent consist with domain id set by
context_set_domain_id(), avoids setting NULL to address space root
and corrects macro cap_ndoms.
Signed-off-by: Weidong Han <weidong.han@intel.com>
be adjusted for FLAGS push), and fix up vmx_realmode() exit protocol
now that it is called from asm stub context.
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
vmx realmode: Fix decode & emulate loop, add hooks for CPUID, HLT and
WBINVD. Also do not hook realmode entry off of vmentry failure any
more.
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
Also tweak debug tracing to be much less noisy. We can emulates tens
of thousands of instructions in rombios now.
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
Still plenty to do:
- i/o emulation
- more instructions
- interrupt/exception delivery
- vm86 fast path
At this stage we can get three instructions into the rombios.
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
This patch removes a wrong if condition judgement to setup rmrr
identify mapping for guests, and passes page count rather than address
size to iommu_flush_iotlb_psi().
Signed-off-by: Weidong Han <weidong.han@intel.com>
Signed-off-by: Anthony Xu <Anthony.xu@intel.com>
Since the pre_domain_create hook is called also for Dom-0, this
special case handling is not necessary any more.
Signed-off-by: Stefan Berger <stefanb@us.ibm.com>
Even when using __builtin_memcmp, gcc may emit external references to
memcmp (when not optimizing for instance), so this #define does not
always provide a completely suitable memcmp().
Signed-off-by: Samuel Thibault <samuel.thibault@citrix.com>
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
A callback which wakes a thread may happen between the moment
schedule() gives hand to the idle thread and the latter blocks the
domain. Idle hence needs to atomically check that no thread is
running and block, else awoken threads may have to wait up to 10
seconds.
Signed-off-by: Samuel Thibault <samuel.thibault@citrix.com>
If a thread tries to sleep from a callback or with callbacks disabled,
Mini-OS will completely lock, so make sure this never happens.
Signed-off-by: Samuel Thibault <samuel.thibault@citrix.com>
Keir Fraser