Reviewed-by: Huacai Chen <chenhuacai@xxxxxxxxxx> On Wed, Dec 30, 2020 at 11:25 AM Jiaxun Yang <jiaxun.yang@xxxxxxxxxxx> wrote: > > Accorading to MIPS's announcement[1], only P5600 and P6600 is > affected by spectre v1 and v2, other cores are not affected. > > So we mark vulnerabilities states for MIPS cores as known and > set P5600 and P6600 as vulnerable. > > [1]: https://www.mips.com/blog/mips-response-on-speculative-execution-and-side-channel-vulnerabilities/ > > Signed-off-by: Jiaxun Yang <jiaxun.yang@xxxxxxxxxxx> > --- > arch/mips/kernel/cpu-probe.c | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c > index 03adeed58efb..2460783dbdb1 100644 > --- a/arch/mips/kernel/cpu-probe.c > +++ b/arch/mips/kernel/cpu-probe.c > @@ -1688,6 +1688,9 @@ static inline void cpu_probe_legacy(struct cpuinfo_mips *c, unsigned int cpu) > static inline void cpu_probe_mips(struct cpuinfo_mips *c, unsigned int cpu) > { > c->writecombine = _CACHE_UNCACHED_ACCELERATED; > + c->vulnerabilities |= MIPS_VULNBL_MELTDOWN | > + MIPS_VULNBL_SPECTRE_V1 | MIPS_VULNBL_SPECTRE_V2; > + > switch (c->processor_id & PRID_IMP_MASK) { > case PRID_IMP_QEMU_GENERIC: > c->writecombine = _CACHE_UNCACHED; > @@ -1794,10 +1797,12 @@ static inline void cpu_probe_mips(struct cpuinfo_mips *c, unsigned int cpu) > case PRID_IMP_P5600: > c->cputype = CPU_P5600; > __cpu_name[cpu] = "MIPS P5600"; > + c->vulnerable |= MIPS_VULNBL_SPECTRE_V1 | MIPS_VULNBL_SPECTRE_V2; > break; > case PRID_IMP_P6600: > c->cputype = CPU_P6600; > __cpu_name[cpu] = "MIPS P6600"; > + c->vulnerable |= MIPS_VULNBL_SPECTRE_V1 | MIPS_VULNBL_SPECTRE_V2; > break; > case PRID_IMP_I6400: > c->cputype = CPU_I6400; > -- > 2.30.0 >
