On 05/18/2013 10:47 PM, Sanjay Lal wrote:
The following patch set adds support for the recently announced virtualization
extensions for the MIPS32 architecture and allows running unmodified kernels in
Guest Mode.
For more info please refer to :
MIPS Document #: MD00846
Volume IV-i: Virtualization Module of the MIPS32 Architecture
which can be accessed @:
http://www.mips.com/auth/MD00846-2B-VZMIPS32-AFP-01.03.pdf
The patch is agains Linux-3.10-rc1.
KVM/MIPS now supports 2 modes of operation:
(1) VZ mode: Unmodified kernels running in Guest Mode. The processor now
provides
an almost complete COP0 context in Guest mode. This greatly reduces VM
exits.
Two questions:
1) How are you handling not clobbering the Guest K0/K1 registers when a
Root exception occurs? It is not obvious to me from inspecting the code.
2) What environment are you using to test this stuff?
David Daney
(2) Trap and Emulate: Runs minimally modified guest kernels in UM and uses
binary patching
to minimize the number of traps and improve performance. This is used for
processors
that do not support the VZ-ASE.
--
Sanjay Lal (18):
Revert "MIPS: microMIPS: Support dynamic ASID sizing."
Revert "MIPS: Allow ASID size to be determined at boot time."
KVM/MIPS32: Export min_low_pfn.
KVM/MIPS32-VZ: MIPS VZ-ASE related register defines and helper
macros.
KVM/MIPS32-VZ: VZ-ASE assembler wrapper functions to set GuestIDs
KVM/MIPS32-VZ: VZ-ASE related callbacks to handle guest exceptions
that trap to the Root context.
KVM/MIPS32: VZ-ASE related CPU feature flags and options.
KVM/MIPS32-VZ: Entry point for trampolining to the guest and trap
handlers.
KVM/MIPS32-VZ: Add support for CONFIG_KVM_MIPS_VZ option
KVM/MIPS32-VZ: Add API for VZ-ASE Capability
KVM/MIPS32-VZ: VZ: Handle Guest TLB faults that are handled in Root
context
KVM/MIPS32-VZ: VM Exit Stats, add VZ exit reasons.
KVM/MIPS32-VZ: Top level handler for Guest faults
KVM/MIPS32-VZ: Guest exception batching support.
KVM/MIPS32: Add dummy trap handler to catch unexpected exceptions and
dump out useful info
KVM/MIPS32-VZ: Add VZ-ASE support to KVM/MIPS data structures.
KVM/MIPS32: Revert to older method for accessing ASID parameters
KVM/MIPS32-VZ: Dump out additional info about VZ features as part of
/proc/cpuinfo
arch/mips/include/asm/cpu-features.h | 36 ++
arch/mips/include/asm/cpu-info.h | 21 +
arch/mips/include/asm/cpu.h | 5 +
arch/mips/include/asm/kvm_host.h | 244 ++++++--
arch/mips/include/asm/mipsvzregs.h | 494 +++++++++++++++
arch/mips/include/asm/mmu_context.h | 95 ++-
arch/mips/kernel/genex.S | 2 +-
arch/mips/kernel/mips_ksyms.c | 6 +
arch/mips/kernel/proc.c | 11 +
arch/mips/kernel/smtc.c | 10 +-
arch/mips/kernel/traps.c | 6 +-
arch/mips/kvm/Kconfig | 14 +-
arch/mips/kvm/Makefile | 14 +-
arch/mips/kvm/kvm_locore.S | 1088 ++++++++++++++++++----------------
arch/mips/kvm/kvm_mips.c | 73 ++-
arch/mips/kvm/kvm_mips_dyntrans.c | 24 +-
arch/mips/kvm/kvm_mips_emul.c | 236 ++++----
arch/mips/kvm/kvm_mips_int.h | 5 +
arch/mips/kvm/kvm_mips_stats.c | 17 +-
arch/mips/kvm/kvm_tlb.c | 444 +++++++++++---
arch/mips/kvm/kvm_trap_emul.c | 68 ++-
arch/mips/kvm/kvm_vz.c | 786 ++++++++++++++++++++++++
arch/mips/kvm/kvm_vz_locore.S | 74 +++
arch/mips/lib/dump_tlb.c | 5 +-
arch/mips/lib/r3k_dump_tlb.c | 7 +-
arch/mips/mm/tlb-r3k.c | 20 +-
arch/mips/mm/tlb-r4k.c | 2 +-
arch/mips/mm/tlb-r8k.c | 2 +-
arch/mips/mm/tlbex.c | 82 +--
include/uapi/linux/kvm.h | 1 +
30 files changed, 2906 insertions(+), 986 deletions(-)
create mode 100644 arch/mips/include/asm/mipsvzregs.h
create mode 100644 arch/mips/kvm/kvm_vz.c
create mode 100644 arch/mips/kvm/kvm_vz_locore.S
--
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