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KVM: MIPS: Add VZ support to build system

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Add support for the MIPS Virtualization (VZ) ASE to the MIPS KVM build
system. For now KVM can only be configured for T&E or VZ and not both,
but the design of the user facing APIs support the possibility of having
both available, so this could change in future.

Note that support for various optional guest features (some of which
can't be turned off) are implemented in immediately following commits,
so although it should now be possible to build VZ support, it may not
work yet on your hardware.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: "Radim Krčmář" <rkrcmar@redhat.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org
This commit is contained in:
James Hogan 2017-03-14 10:15:32 +00:00
parent c992a4f6a9
commit 56f7a44050
2 changed files with 32 additions and 3 deletions
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27
arch/mips/kvm/Kconfig
View File

@ -26,11 +26,34 @@ config KVM
select SRCU
---help---
Support for hosting Guest kernels.
Currently supported on MIPS32 processors.
choice
prompt "Virtualization mode"
depends on KVM
default KVM_MIPS_TE
config KVM_MIPS_TE
bool "Trap & Emulate"
---help---
Use trap and emulate to virtualize 32-bit guests in user mode. This
does not require any special hardware Virtualization support beyond
standard MIPS32/64 r2 or later, but it does require the guest kernel
to be configured with CONFIG_KVM_GUEST=y so that it resides in the
user address segment.
config KVM_MIPS_VZ
bool "MIPS Virtualization (VZ) ASE"
---help---
Use the MIPS Virtualization (VZ) ASE to virtualize guests. This
supports running unmodified guest kernels (with CONFIG_KVM_GUEST=n),
but requires hardware support.
endchoice
config KVM_MIPS_DYN_TRANS
bool "KVM/MIPS: Dynamic binary translation to reduce traps"
depends on KVM
depends on KVM_MIPS_TE
default y
---help---
When running in Trap & Emulate mode patch privileged
instructions to reduce the number of traps.

8
arch/mips/kvm/Makefile
View File

@ -9,9 +9,15 @@ common-objs-$(CONFIG_CPU_HAS_MSA) += msa.o
kvm-objs := $(common-objs-y) mips.o emulate.o entry.o \
interrupt.o stats.o commpage.o \
dyntrans.o trap_emul.o fpu.o
fpu.o
kvm-objs += hypcall.o
kvm-objs += mmu.o
ifdef CONFIG_KVM_MIPS_VZ
kvm-objs += vz.o
else
kvm-objs += dyntrans.o
kvm-objs += trap_emul.o
endif
obj-$(CONFIG_KVM) += kvm.o
obj-y += callback.o tlb.o