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authorHuacai Chen <chenhc@lemote.com>2020-05-23 09:56:38 +0200
committerPaolo Bonzini <pbonzini@redhat.com>2020-06-04 19:51:33 +0200
commit7f2a83f1c2a941ebfee53f504ed5fdbc61cfb333 (patch)
treed9b831da059d45b689210a8f845a539b9f9c917e /arch/openrisc
parentKVM: MIPS: Add Loongson-3 Virtual IPI interrupt support (diff)
downloadlinux-7f2a83f1c2a941ebfee53f504ed5fdbc61cfb333.tar.xz
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KVM: MIPS: Add CPUCFG emulation for Loongson-3
Loongson-3 overrides lwc2 instructions to implement CPUCFG and CSR read/write functions. These instructions all cause guest exit so CSR doesn't benifit KVM guest (and there are always legacy methods to provide the same functions as CSR). So, we only emulate CPUCFG and let it return a reduced feature list (which means the virtual CPU doesn't have any other advanced features, including CSR) in KVM. Reviewed-by: Aleksandar Markovic <aleksandar.qemu.devel@gmail.com> Signed-off-by: Huacai Chen <chenhc@lemote.com> Co-developed-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Message-Id: <1590220602-3547-12-git-send-email-chenhc@lemote.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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