[PATCH AUTOSEL 5.8 36/62] MIPS: KVM: Limit Trap-and-Emulate to MIPS32R2 only
From: Sasha Levin <sashal@kernel.org>
Date: 2020-08-21 17:26:29
Also in:
kvm, lkml, stable
Subsystem:
kernel virtual machine for mips (kvm/mips), mips, the rest · Maintainers:
Huacai Chen, Thomas Bogendoerfer, Linus Torvalds
From: Jiaxun Yang <jiaxun.yang@flygoat.com> [ Upstream commit 01edc5e76ecfecf9a79eec2658f6146ef47bc816 ] 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: [ref] Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Sasha Levin <sashal@kernel.org> --- arch/mips/Kconfig | 1 + arch/mips/kvm/Kconfig | 3 ++- 2 files changed, 3 insertions(+), 1 deletion(-)
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 6fee1a133e9d6..2efc34ed94ebe 100644
--- 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 2bf02d849a3a8..032b3fca6cbba 100644
--- 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.
--
2.25.1