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| author | James Hogan <james.hogan@imgtec.com> | 2015-02-06 10:56:27 +0000 |
|---|---|---|
| committer | James Hogan <james.hogan@imgtec.com> | 2015-03-27 21:25:16 +0000 |
| commit | 1c0cd66adbac8aa339b9521eceb18b00d1b0699e (patch) | |
| tree | 62a893856435ad26ac8724cb23c3e47b63d177bd /arch/mips/include | |
| parent | 6cdc65e31d4f70561d71eeaf34a2a70ab68bf146 (diff) | |
| download | op-kernel-dev-1c0cd66adbac8aa339b9521eceb18b00d1b0699e.zip op-kernel-dev-1c0cd66adbac8aa339b9521eceb18b00d1b0699e.tar.gz | |
MIPS: KVM: Add FP exception handling
Add guest exception handling for floating point exceptions and
coprocessor 1 unusable exceptions.
Floating point exceptions from the guest need passing to the guest
kernel, so for these a guest FPE is emulated.
Also, coprocessor 1 unusable exceptions are normally passed straight
through to the guest (because no guest FPU was supported), but the
hypervisor can now handle them if the guest has its FPU enabled by
restoring the guest FPU context and enabling the FPU.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Gleb Natapov <gleb@kernel.org>
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org
Diffstat (limited to 'arch/mips/include')
| -rw-r--r-- | arch/mips/include/asm/kvm_host.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/mips/include/asm/kvm_host.h b/arch/mips/include/asm/kvm_host.h index 866edf3..fb264d8 100644 --- a/arch/mips/include/asm/kvm_host.h +++ b/arch/mips/include/asm/kvm_host.h @@ -123,6 +123,7 @@ struct kvm_vcpu_stat { u32 resvd_inst_exits; u32 break_inst_exits; u32 trap_inst_exits; + u32 fpe_exits; u32 flush_dcache_exits; u32 halt_successful_poll; u32 halt_wakeup; @@ -143,6 +144,7 @@ enum kvm_mips_exit_types { RESVD_INST_EXITS, BREAK_INST_EXITS, TRAP_INST_EXITS, + FPE_EXITS, FLUSH_DCACHE_EXITS, MAX_KVM_MIPS_EXIT_TYPES }; @@ -585,6 +587,7 @@ struct kvm_mips_callbacks { int (*handle_res_inst)(struct kvm_vcpu *vcpu); int (*handle_break)(struct kvm_vcpu *vcpu); int (*handle_trap)(struct kvm_vcpu *vcpu); + int (*handle_fpe)(struct kvm_vcpu *vcpu); int (*handle_msa_disabled)(struct kvm_vcpu *vcpu); int (*vm_init)(struct kvm *kvm); int (*vcpu_init)(struct kvm_vcpu *vcpu); @@ -734,6 +737,11 @@ extern enum emulation_result kvm_mips_emulate_trap_exc(unsigned long cause, struct kvm_run *run, struct kvm_vcpu *vcpu); +extern enum emulation_result kvm_mips_emulate_fpe_exc(unsigned long cause, + uint32_t *opc, + struct kvm_run *run, + struct kvm_vcpu *vcpu); + extern enum emulation_result kvm_mips_complete_mmio_load(struct kvm_vcpu *vcpu, struct kvm_run *run); |
