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authorJames Hogan <james.hogan@imgtec.com>2017-03-14 10:15:32 +0000
committerJames Hogan <james.hogan@imgtec.com>2017-03-28 14:53:54 +0100
commit56f7a4405047353684e0d083d7426594daa5e344 (patch)
treebd5ceb1585b9180fff9b5204a57eb2621515115b /arch/mips/kvm
parentc992a4f6a9b0a37c8bd7dfc727ecc3fed125c16b (diff)
downloadlinux-56f7a4405047353684e0d083d7426594daa5e344.tar.bz2
KVM: MIPS: Add VZ support to build system
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
Diffstat (limited to 'arch/mips/kvm')
-rw-r--r--arch/mips/kvm/Kconfig27
-rw-r--r--arch/mips/kvm/Makefile8
2 files changed, 32 insertions, 3 deletions
diff --git a/arch/mips/kvm/Kconfig b/arch/mips/kvm/Kconfig
index 65067327db12..50a722dfb236 100644
--- a/arch/mips/kvm/Kconfig
+++ b/arch/mips/kvm/Kconfig
@@ -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.
diff --git a/arch/mips/kvm/Makefile b/arch/mips/kvm/Makefile
index e56403c8a3f5..45d90f5d5177 100644
--- a/arch/mips/kvm/Makefile
+++ b/arch/mips/kvm/Makefile
@@ -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