Please note that currently, the IOMMU is hardcoded currently at a specific
physical address that requires the ACPI stuff to find out dynamically.
*THIS WILL NOT WORK OUT OF THE BOX FOR A DIFFERENT MACHINE CONFIGURATION
OTHER THAN THE ONES WE BUILT IN MTV*
If you're looking to try it out on another machine, you'll need to find out
the IOMMU's register bases in the VHRD, and find out which IOMMU maps
to the IOAPIC you want. Then you can change the DMAR_REG_PADDR value in
kern/arch/x86/iommu.h to whatever the VHRD tells you.
The following changes since commit 0b10f30b9b9b18f0e45390231dbdaf7b045fbd5b:
Print ${remote}:${head} in link for code review (2015-12-03 12:38:20
-0500)
are available in the git repository at:
[email protected]:GanShun/akaros.git
for you to fetch changes up to dbdd541935111c8d418c77f83ddb885528768b89:
Swapped IPI sending to a full 64-bit write and APIC writes to msr regs.
(2015-12-04 11:18:48 -0800)
----------------------------------------------------------------
GanShun (5):
Switched from APIC to X2APIC mode
Initialized IOMMU and modified IOAPIC to send remappable interrupts.
ExtINT mode for IOMMU is working and remaps IOAPIC IRQ 4 to vector 39
IOMMU Rerouting of Interrupt 4 is now working. Busybox is receiving
intrs
Swapped IPI sending to a full 64-bit write and APIC writes to msr
regs.
kern/arch/x86/Kbuild | 1 +
kern/arch/x86/apic.c | 34 ++++++++-------
kern/arch/x86/apic.h | 105
++++++++++++++++++++++++-----------------------
kern/arch/x86/apic9.c | 174
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++----------------
kern/arch/x86/ioapic.c | 34 ++++++++++++---
kern/arch/x86/ioapic.h | 3 +-
kern/arch/x86/iommu.c | 178
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
kern/arch/x86/iommu.h | 105
+++++++++++++++++++++++++++++++++++++++++++++++
kern/arch/x86/mp.c | 4 +-
kern/arch/x86/pmap64.c | 7 +++-
kern/arch/x86/ros/mmu64.h | 7 ++--
kern/arch/x86/smp_boot.c | 6 ++-
kern/arch/x86/time.c | 4 +-
kern/arch/x86/trap.c | 30 ++++++++++++++
kern/arch/x86/trapentry64.S | 3 +-
kern/arch/x86/vmm/intel/vmx.c | 9 +++-
tests/vmm/vmrunkernel.c | 43 ++++++++++++-------
17 files changed, 611 insertions(+), 136 deletions(-)
create mode 100644 kern/arch/x86/iommu.c
create mode 100644 kern/arch/x86/iommu.h
https://github.com/GanShun/akaros/compare/0b10f30b9b9b18f0e45390231dbdaf7b045fbd5b...dbdd541935111c8d418c77f83ddb885528768b89
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