diff options
| author | James Hogan <james.hogan@imgtec.com> | 2016-10-11 23:14:39 +0100 |
|---|---|---|
| committer | James Hogan <james.hogan@imgtec.com> | 2017-02-03 15:20:45 +0000 |
| commit | c550d53934d821dbdd867ca314d417f2e918c72c (patch) | |
| tree | 54fd7a9dce7d5ae71c9720458a833f66d1619c99 /arch/mips/kvm/emulate.c | |
| parent | 1581ff3dbf698abba00f39039cc5bd854400b664 (diff) | |
| download | linux-c550d53934d821dbdd867ca314d417f2e918c72c.tar.gz linux-c550d53934d821dbdd867ca314d417f2e918c72c.tar.bz2 linux-c550d53934d821dbdd867ca314d417f2e918c72c.zip | |
KVM: MIPS: Remove duplicated ASIDs from vcpu
The kvm_vcpu_arch structure contains both mm_structs for allocating MMU
contexts (primarily the ASID) but it also copies the resulting ASIDs
into guest_{user,kernel}_asid[] arrays which are referenced from uasm
generated code.
This duplication doesn't seem to serve any purpose, and it gets in the
way of generalising the ASID handling across guest kernel/user modes, so
lets just extract the ASID straight out of the mm_struct on demand, and
in fact there are convenient cpu_context() and cpu_asid() macros for
doing so.
To reduce the verbosity of this code we do also add kern_mm and user_mm
local variables where the kernel and user mm_structs are used.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: "Radim Krčmář" <rkrcmar@redhat.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org
Diffstat (limited to 'arch/mips/kvm/emulate.c')
| -rw-r--r-- | arch/mips/kvm/emulate.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/arch/mips/kvm/emulate.c b/arch/mips/kvm/emulate.c index aa0937423e28..060acc5b3378 100644 --- a/arch/mips/kvm/emulate.c +++ b/arch/mips/kvm/emulate.c @@ -856,6 +856,8 @@ enum emulation_result kvm_mips_emul_tlbr(struct kvm_vcpu *vcpu) static void kvm_mips_invalidate_guest_tlb(struct kvm_vcpu *vcpu, struct kvm_mips_tlb *tlb) { + struct mm_struct *kern_mm = &vcpu->arch.guest_kernel_mm; + struct mm_struct *user_mm = &vcpu->arch.guest_user_mm; int cpu, i; bool user; @@ -879,8 +881,8 @@ static void kvm_mips_invalidate_guest_tlb(struct kvm_vcpu *vcpu, if (i == cpu) continue; if (user) - vcpu->arch.guest_user_asid[i] = 0; - vcpu->arch.guest_kernel_asid[i] = 0; + cpu_context(i, user_mm) = 0; + cpu_context(i, kern_mm) = 0; } preempt_enable(); @@ -1056,6 +1058,7 @@ enum emulation_result kvm_mips_emulate_CP0(union mips_instruction inst, struct kvm_vcpu *vcpu) { struct mips_coproc *cop0 = vcpu->arch.cop0; + struct mm_struct *kern_mm = &vcpu->arch.guest_kernel_mm; enum emulation_result er = EMULATE_DONE; u32 rt, rd, sel; unsigned long curr_pc; @@ -1178,13 +1181,11 @@ enum emulation_result kvm_mips_emulate_CP0(union mips_instruction inst, */ preempt_disable(); cpu = smp_processor_id(); - kvm_get_new_mmu_context(&vcpu->arch.guest_kernel_mm, + kvm_get_new_mmu_context(kern_mm, cpu, vcpu); - vcpu->arch.guest_kernel_asid[cpu] = - vcpu->arch.guest_kernel_mm.context.asid[cpu]; for_each_possible_cpu(i) if (i != cpu) - vcpu->arch.guest_kernel_asid[i] = 0; + cpu_context(i, kern_mm) = 0; preempt_enable(); } kvm_write_c0_guest_entryhi(cop0, |