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>

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 6fee1a133e9d6a938351c5eff65bc58c9bcd02bb..2efc34ed94ebeb69abaa875839457666cdca1b1b 100644 (file)
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -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)

diff --git a/arch/mips/kvm/Kconfig b/arch/mips/kvm/Kconfig
index 2bf02d849a3a8a50d26d4c0c4c763e6288b004bc..032b3fca6cbba0a352f591c382fb91cca3c6971d 100644 (file)
--- a/arch/mips/kvm/Kconfig
+++ b/arch/mips/kvm/Kconfig
@@ -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.