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MIPS: KVM: Limit Trap-and-Emulate to MIPS32R2 only 

After tons of fixes to get Trap-and-Emulate build on Loongson64,
I've got panic on host machine when trying to run a VM.

I found that it can never work on 64bit systems. Revewing the
code, it looks like R6 can't supportrd by TE as well.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Message-Id: <20200710063047.154611-3-jiaxun.yang@flygoat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Jiaxun Yang 2020-07-10 14:30:17 +08:00 committed by Paolo Bonzini
parent 380f3a8b63
commit 01edc5e76e
2 changed files with 3 additions and 1 deletions
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1
arch/mips/Kconfig
View File

@ -2202,6 +2202,7 @@ endchoice
config KVM_GUEST config KVM_GUEST
bool "KVM Guest Kernel" bool "KVM Guest Kernel"
depends on CPU_MIPS32_R2
depends on BROKEN_ON_SMP depends on BROKEN_ON_SMP
help help
Select this option if building a guest kernel for KVM (Trap & Emulate) Select this option if building a guest kernel for KVM (Trap & Emulate)

3
arch/mips/kvm/Kconfig
View File

@ -37,10 +37,11 @@ choice
config KVM_MIPS_TE config KVM_MIPS_TE
bool "Trap & Emulate" bool "Trap & Emulate"
depends on CPU_MIPS32_R2
help help
Use trap and emulate to virtualize 32-bit guests in user mode. This Use trap and emulate to virtualize 32-bit guests in user mode. This
does not require any special hardware Virtualization support beyond does not require any special hardware Virtualization support beyond
standard MIPS32/64 r2 or later, but it does require the guest kernel standard MIPS32 r2 or later, but it does require the guest kernel
to be configured with CONFIG_KVM_GUEST=y so that it resides in the to be configured with CONFIG_KVM_GUEST=y so that it resides in the
user address segment. user address segment.