| created | 2021-09-13T16:20:01Z |
|---|---|
| begin | 2021-09-05T00:00:00Z |
| end | 2021-09-06T00:00:00Z |
| path | src/sys |
| commits | 5 |
| date | 2021-09-05T07:59:47Z | |||
|---|---|---|---|---|
| author | mpi | |||
| files | src/sys/dev/pci/drm/ttm/ttm_bo_vm.c | log | diff | annotate |
| message |
Pass `uobj' to uvmfault_unlockall() at the end of the fault handler. This is currently a NOOP but will become necessary to unlock the UVM object with the upcoing "vmobjlock" diff. Tested by patrick@ and robert@ ok jsg@ |
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| date | 2021-09-05T11:44:46Z | |||
|---|---|---|---|---|
| author | mpi | |||
| files | src/sys/arch/amd64/amd64/pmap.c | log | diff | annotate |
| src/sys/arch/hppa/hppa/pmap.c | log | diff | annotate | |
| src/sys/arch/i386/i386/pmap.c | log | diff | annotate | |
| src/sys/kern/vfs_bio.c | log | diff | annotate | |
| src/sys/kern/vfs_biomem.c | log | diff | annotate | |
| src/sys/uvm/uvm_object.c | log | diff | annotate | |
| src/sys/uvm/uvm_object.h | log | diff | annotate | |
| src/sys/uvm/uvm_page.c | log | diff | annotate | |
| message |
Introduce dummy pagers for 'special' subsystems using UVM objects. Some pmaps (x86, hppa) and the buffer cache rely on UVM objects to allocate and manipulate pages. These objects should not be manipulated by uvm_fault() and do not currently require the same locking enforcement. Use the dummy pagers to explicitly document which UVM functions are meant to manipulate UVM objects (uobj) that do not need the upcoming `vmobjlock' and instead still rely on the KERNEL_LOCK(). Tested by many as part of a larger diff. ok kettenis@, beck@ |
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| date | 2021-09-05T13:13:31Z | |||
|---|---|---|---|---|
| author | dv | |||
| files | src/sys/arch/amd64/amd64/vmm.c | log | diff | annotate |
| message |
vmm(4): fix vcpu locking issues reported by syzbot Syzbot found 3 issues related to the new vcpu lock. This diff adds a write lock to vm_rwregs (needed on VMX as vmread instructions require taking ownership of the vcpu to load the VMCS) and prevents locking the vcpu in vm_run if we fail the cas operation for toggling vcpu state. In the future, we can push the locking in vm_rwregs on AMD SVM systems. The panics in question: panic: rw_enter: vcpulock locking against myself panic: lock (rwlock) vcpulock not locked panic: vcpulock: lock not held Reported-by: [email protected] Reported-by: [email protected] Reported-by: [email protected] ok mlarkin@ |
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| date | 2021-09-05T16:16:13Z | |||
|---|---|---|---|---|
| author | mglocker | |||
| files | src/sys/dev/usb/usb.c | log | diff | annotate |
| message |
This allows us to disable usb(4) without kernel crash. ok mpi@ |
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| date | 2021-09-05T16:36:34Z | |||
|---|---|---|---|---|
| author | dv | |||
| files | src/sys/arch/amd64/amd64/vmm.c | log | diff | annotate |
| message |
vmm(4): raise vm pool ipl to IPL_MPFLOOR Similar to the recent change by mpi in revision 1.288, commitid: A4zhVhOoHAIpRGBJ, raise the ipl level of the vm_pool to IPL_MPFLOOR to prevent lock ordering issues. ok mpi@ |
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