MIPS: KVM: Limit Trap-and-Emulate to MIPS32R2 only (01edc5e7) · Commits · 戴 / test

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>

arch/mips/Kconfig

+1 −0

Original line number	Diff line number	Diff line
		@@ -2202,6 +2202,7 @@ endchoice

		config KVM_GUEST
		bool "KVM Guest Kernel"
		depends on CPU_MIPS32_R2
		depends on BROKEN_ON_SMP
		help
		Select this option if building a guest kernel for KVM (Trap & Emulate)

arch/mips/kvm/Kconfig

+2 −1

Original line number	Diff line number	Diff line
		@@ -37,10 +37,11 @@ choice

		config KVM_MIPS_TE
		bool "Trap & Emulate"
		depends on CPU_MIPS32_R2
		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
		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
		user address segment.

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