94 lines
2.7 KiB
Plaintext
94 lines
2.7 KiB
Plaintext
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Synchronize page writes with iCache in bochs.
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Deal with cycle counts of guest execution in VM, and in
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bochs/plex86 shim.
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Complete the CPUID info passing between bochs/plex86.
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Make a host-null.c file to demonstrate/test the OS-specific
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files that are needed for a host port.
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Deal with page_usage. How do we update this between timeslices?
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Do we always clear it? Maybe we should keep a log of things to
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clear (page_usage, GDT entries, PDE entries, ...) and clear those
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before returning to user space.
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monpanic breaks up into 2 monprints which hit user space twice.
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Task segment must be a 32-bit'er.
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Save/restore floating point state of host/VM.
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pack guest_cpu_t structure.
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deduct off some cycles for the IRET/int sequence.
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Delete use of vm->addr, and split print-nexus into parts so we can
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use direct host or guest fields. I don't like having implicit
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pointer usage.
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Not compiled for debug
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Compiled for BX_SMP_PROCESSORS == 1
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cpuid match
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x86 host
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monitor uses slots 1,2,3 so guest ring3 should not
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use these slots.
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FIX a20 in system fields.
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FIX use of CPL in paging-mon.c. We can eliminate any
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code other than CPL==3.
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==================== From previous plex86 TODO file ====================
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This is a list of the major tasks/achievements/milestones yet to-do.
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We should keep this list prioritized, creating sort of a road map.
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Hopefully, this will reduce duplicate suggestions on the developers
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channels, and let people know where we are in the development process.
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Entries listed first have highest priority.
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<NEAR-TERM>
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- Fix plex86 on Linux 2.4.x/SMP or with 1P and LAPIC enabled.
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- Save FPU state on host <--> monitor context switch.
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- Special guest-specific drivers and special emulated pseudo-devices
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for faster graphics/network/disk access.
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- Allow some of the inactive guest pages be host swappable.
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Currently, all pages are locked down.
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- Many performance enhancements (see PERFORMANCE)
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- Test and get more guests running; list in 'GUESTS'.
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- Allow memory to be mapped anywhere in the physical address
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space.
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- Allow certain guest pages to be swap eligible by the host.
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This means they will have to be unavailable by the guest
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during that time. Need a dynamic algorith for this.
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- Test on 2.4 with SMP/APIC enabled on single processor machine.
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- Deal with guest use of TF.
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- Deal with LDT
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Use monitor unmapped IO port handler rather than user space.
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Get rid of VM message count instrumentation spew to kernel log
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unallocVmPages/unreserve_guest_pages called twice,
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release & teardown.
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move mapMonitor to -host.c
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Zero out GDT when remapped.
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When is mapMonitor called?
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Fix extra PDBR reload in nexus.S
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