Commit a7c7ad6c authored by James Hogan's avatar James Hogan

MIPS: Probe guest CP0_UserLocal

Probe for presence of guest CP0_UserLocal register and expose via
cpu_guest_has_userlocal. This register is optional pre-r6, so this will
allow KVM to only save/restore/expose the guest CP0_UserLocal register
if it exists.
Signed-off-by: default avatarJames Hogan <james.hogan@imgtec.com>
Acked-by: default avatarRalf Baechle <ralf@linux-mips.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: "Radim Krčmář" <rkrcmar@redhat.com>
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org
parent f359a111
......@@ -547,6 +547,9 @@
#ifndef cpu_guest_has_maar
#define cpu_guest_has_maar (cpu_data[0].guest.options & MIPS_CPU_MAAR)
#endif
#ifndef cpu_guest_has_userlocal
#define cpu_guest_has_userlocal (cpu_data[0].guest.options & MIPS_CPU_ULRI)
#endif
/*
* Guest dynamic capabilities
......
......@@ -1005,7 +1005,8 @@ static inline unsigned int decode_guest_config3(struct cpuinfo_mips *c)
unsigned int config3, config3_dyn;
probe_gc0_config_dyn(config3, config3, config3_dyn,
MIPS_CONF_M | MIPS_CONF3_MSA | MIPS_CONF3_CTXTC);
MIPS_CONF_M | MIPS_CONF3_MSA | MIPS_CONF3_ULRI |
MIPS_CONF3_CTXTC);
if (config3 & MIPS_CONF3_CTXTC)
c->guest.options |= MIPS_CPU_CTXTC;
......@@ -1015,6 +1016,9 @@ static inline unsigned int decode_guest_config3(struct cpuinfo_mips *c)
if (config3 & MIPS_CONF3_PW)
c->guest.options |= MIPS_CPU_HTW;
if (config3 & MIPS_CONF3_ULRI)
c->guest.options |= MIPS_CPU_ULRI;
if (config3 & MIPS_CONF3_SC)
c->guest.options |= MIPS_CPU_SEGMENTS;
......
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