- Add 'mach' and 'vcpu' backpointers in the nvmm_io and nvmm_mem
structures.
- Rename 'nvmm_callbacks' to 'nvmm_assist_callbacks'.
- Rename and migrate NVMM_MACH_CONF_CALLBACKS to NVMM_VCPU_CONF_CALLBACKS,
it now becomes per-VCPU.
issues in the libnvmm API.
- Rename NVMM_CAPABILITY_VERSION to NVMM_KERN_VERSION, and check it in
libnvmm. Introduce NVMM_USER_VERSION, for future use.
- In libnvmm, open "/dev/nvmm" as read-only and with O_CLOEXEC. This is to
avoid sharing the VMs with the children if the process forks. In the
NVMM driver, force O_CLOEXEC on open().
- Rename the following things for consistency:
nvmm_exit* -> nvmm_vcpu_exit*
nvmm_event* -> nvmm_vcpu_event*
NVMM_EXIT_* -> NVMM_VCPU_EXIT_*
NVMM_EVENT_INTERRUPT_HW -> NVMM_VCPU_EVENT_INTR
NVMM_EVENT_EXCEPTION -> NVMM_VCPU_EVENT_EXCP
Delete NVMM_EVENT_INTERRUPT_SW, unused already.
- Slightly reorganize the MI/MD definitions, for internal clarity.
- Split NVMM_VCPU_EXIT_MSR in two: NVMM_VCPU_EXIT_{RD,WR}MSR. Also provide
separate u.rdmsr and u.wrmsr fields. This is more consistent with the
other exit reasons.
- Change the types of several variables:
event.type enum -> u_int
event.vector uint64_t -> uint8_t
exit.u.*msr.msr: uint64_t -> uint32_t
exit.u.io.type: enum -> bool
exit.u.io.seg: int -> int8_t
cap.arch.mxcsr_mask: uint64_t -> uint32_t
cap.arch.conf_cpuid_maxops: uint64_t -> uint32_t
- Delete NVMM_VCPU_EXIT_MWAIT_COND, it is AMD-only and confusing, and we
already intercept 'monitor' so it is never armed.
- Introduce vmx_exit_insn() for NVMM-Intel, similar to svm_exit_insn().
The 'npc' field wasn't getting filled properly during certain VMEXITs.
- Introduce nvmm_vcpu_configure(). Similar to nvmm_machine_configure(),
but as its name indicates, the configuration is per-VCPU and not per-VM.
Migrate and rename NVMM_MACH_CONF_X86_CPUID to NVMM_VCPU_CONF_CPUID.
This becomes per-VCPU, which makes more sense than per-VM.
- Extend the NVMM_VCPU_CONF_CPUID conf to allow triggering VMEXITs on
specific leaves. Until now we could only mask the leaves. An uint32_t
is added in the structure:
uint32_t mask:1;
uint32_t exit:1;
uint32_t rsvd:30;
The two first bits select the desired behavior on the leaf. Specifying
zero on both resets the leaf to the default behavior. The new
NVMM_VCPU_EXIT_CPUID exit reason is added.
Fix a race condition that caused PT_GET_SIGINFO to return incorrect
information when multiple signals were delivered concurrently
to different LWPs. Add a regression test that verifies that when 50
threads concurrently use pthread_kill() on themselves, the debugger
receives all signals with correct information.
The kernel uses separate signal queues for each LWP. However,
the signal context used to implement PT_GET_SIGINFO is stored in 'struct
proc' and therefore common to all LWPs in the process. Previously,
this member was filled in kpsignal2(), i.e. when the signal was sent.
This meant that if another LWP managed to send another signal
concurrently, the data was overwritten before the process was stopped.
As a result, PT_GET_SIGINFO did not report the correct LWP and signal
(it could even report a different signal than wait()). This can be
quite reliably reproduced with the number of 20 LWPs, however it can
also occur with 10.
This patch moves setting of signal context to issignal(), just before
the process is actually stopped. The data is taken from per-LWP
or per-process signal queue. The added test confirms that the debugger
correctly receives all signals, and PT_GET_SIGINFO reports both correct
LWP and signal number.
Reviewed by kamil.
the first partition as root - in mixed EFI/BIOS setups this might not
be true (and in general the user is free to define arbitrary orders).
Pointed out by Robert Nestor.
For drivers that name their pins, this can be used to determine how the
logical pins are mapped to physical pins. Example from sunxigpio(4):
# gpioctl gpio0 list
0: PA0
1: PA1
2: PA2
...
