It looks some cacheline alignment restriction so that zbsdmod.o in
NetBSD/zaurus 8.x release cannot jump to a loaded kernel properly.
Adding an explicit alingment pseudo op to put all instructions
between I-cache flush and jumping to the loaded kernel into the
same cacheline solves the issue.
See my post in port-zaurus@ for details:
https://mail-index.netbsd.org/port-zaurus/2019/10/22/msg000069.html
Should be pulled up to netbsd-8 and netbsd-9.
This fixes kernel boot failures of NetBSD/zaurus 8.x and later.
While here, also set empty TEXTADDR also specified in ldscript.
See my post in port-zaurus@ for details:
https://mail-index.netbsd.org/port-zaurus/2019/10/22/msg000069.html
Should be pulled up to netbsd-8 and netbsd-9.
libsanitizer needs to match with the compiler concept of
TARGET_ASAN_SHADOW_OFFSET, since the compiler generates instructions
to access memory at that offset in the code, and expects the
sanitizer library to have mapped something there. If there is
disagreement, Mr. Segmentation Fault comes and resolves it for you.
- Alter locking strategy to avoid deadlock on detach.
- Auto bus probe chews CPU. Increase interval from 3s to 10s.
- Put temp sensor S/N in dev description so it can be identified.
- Use mutex/condvar.
Patch from Andrew Doran.
- Sync the naming with reality.
- Replace "relevant" by "desired" and "virtualizer" by "emulator", closer
to what I meant.
- Add a "VCPU Configuration" section.
- Add a "Machine Ownership" section.
bsd.own.mk also adds it for gcc only (so we end up with 2 -marm for gcc).
Just add -marm unconditionally in bsd.own.mk in ARM_APCS_FLAGS and remove
it from everywhere else.
2. gcc-8 now warns about thumb internetwork in APCS mode. This does not make
sense because the documentation says that this flag does not make a
difference in apcs mode, but might produce larger code in non-APCS mode.
So we just add it to silence the warnings.
Remove const from the 2nd argument.
const char ** and char ** are incompatible types and it was a cost to keep
the technically incompatible form for a more purist variation. NetBSD was
almost the last alive OS to still keep the const argument (known leftovers:
Minix and Illumos).
Keep the const form for the internal purposes inside citrus and rump.
Address the build breakage fallout in the same change.
There are no ABI changes.
Change accepted by core@.
- 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.
