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| author | Huacai Chen <chenhc@lemote.com> | 2020-05-23 09:56:33 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-06-04 19:49:00 +0200 |
| commit | 3210e2c279fee1076978b49988acdd935a6f7435 (patch) | |
| tree | 1029d1e6a5a180ce00a03d99128a60dc9a00007b /arch/mips/kernel/cpu-probe.c | |
| parent | KVM: MIPS: Use lddir/ldpte instructions to lookup gpa_mm.pgd (diff) | |
| download | linux-3210e2c279fee1076978b49988acdd935a6f7435.tar.xz linux-3210e2c279fee1076978b49988acdd935a6f7435.zip | |
KVM: MIPS: Introduce and use cpu_guest_has_ldpte
Loongson-3 has lddir/ldpte instructions and their related CP0 registers
are the same as HTW. So we introduce a cpu_guest_has_ldpte flag and use
it to indicate whether we need to save/restore HTW related CP0 registers
(PWBase, PWSize, PWField and PWCtl).
Acked-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
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: <1590220602-3547-7-git-send-email-chenhc@lemote.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/mips/kernel/cpu-probe.c')
| -rw-r--r-- | arch/mips/kernel/cpu-probe.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c index 6b93162d7c5a..f0e7f2d7bd9a 100644 --- a/arch/mips/kernel/cpu-probe.c +++ b/arch/mips/kernel/cpu-probe.c @@ -2017,8 +2017,10 @@ static inline void decode_cpucfg(struct cpuinfo_mips *c) if (cfg2 & LOONGSON_CFG2_LEXT2) c->ases |= MIPS_ASE_LOONGSON_EXT2; - if (cfg2 & LOONGSON_CFG2_LSPW) + if (cfg2 & LOONGSON_CFG2_LSPW) { c->options |= MIPS_CPU_LDPTE; + c->guest.options |= MIPS_CPU_LDPTE; + } if (cfg3 & LOONGSON_CFG3_LCAMP) c->ases |= MIPS_ASE_LOONGSON_CAM; |