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MIPS: mm: Remove redundant get_new_mmu_context() cpu argument 

get_new_mmu_context() accepts a cpu argument, but implicitly assumes
that this is always equal to smp_processor_id() by operating on the
local CPU's TLB & icache.

Remove the cpu argument and have get_new_mmu_context() call
smp_processor_id() instead.

Signed-off-by: Paul Burton <paul.burton@mips.com>
Cc: linux-mips@vger.kernel.org
This commit is contained in:
Paul Burton 2019-02-02 01:43:17 +00:00
parent 9a27324fde
commit 4739f7dd99
No known key found for this signature in database
GPG Key ID: 3EA79FACB57500DD
4 changed files with 15 additions and 11 deletions
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12
arch/mips/include/asm/mmu_context.h
View File

@ -100,9 +100,13 @@ static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
/* Normal, classic MIPS get_new_mmu_context */
static inline void
get_new_mmu_context(struct mm_struct *mm, unsigned long cpu)
get_new_mmu_context(struct mm_struct *mm)
{
u64 asid = asid_cache(cpu);
unsigned int cpu;
u64 asid;
cpu = smp_processor_id();
asid = asid_cache(cpu);
if (!((asid += cpu_asid_inc()) & cpu_asid_mask(&cpu_data[cpu]))) {
if (cpu_has_vtag_icache)
@ -142,7 +146,7 @@ static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
htw_stop();
/* Check if our ASID is of an older version and thus invalid */
if ((cpu_context(cpu, next) ^ asid_cache(cpu)) & asid_version_mask(cpu))
get_new_mmu_context(next, cpu);
get_new_mmu_context(next);
write_c0_entryhi(cpu_asid(cpu, next));
TLBMISS_HANDLER_SETUP_PGD(next->pgd);
@ -184,7 +188,7 @@ drop_mmu_context(struct mm_struct *mm)
cpu = smp_processor_id();
if (cpumask_test_cpu(cpu, mm_cpumask(mm))) {
get_new_mmu_context(mm, cpu);
get_new_mmu_context(mm);
write_c0_entryhi(cpu_asid(cpu, mm));
} else {
/* will get a new context next time */

2
arch/mips/kvm/emulate.c
View File

@ -1016,7 +1016,7 @@ static void kvm_mips_change_entryhi(struct kvm_vcpu *vcpu,
*/
preempt_disable();
cpu = smp_processor_id();
get_new_mmu_context(kern_mm, cpu);
get_new_mmu_context(kern_mm);
for_each_possible_cpu(i)
if (i != cpu)
cpu_context(i, kern_mm) = 0;

10
arch/mips/kvm/trap_emul.c
View File

@ -1058,7 +1058,7 @@ static int kvm_trap_emul_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
mm = KVM_GUEST_KERNEL_MODE(vcpu) ? kern_mm : user_mm;
if ((cpu_context(cpu, mm) ^ asid_cache(cpu)) &
asid_version_mask(cpu))
get_new_mmu_context(mm, cpu);
get_new_mmu_context(mm);
write_c0_entryhi(cpu_asid(cpu, mm));
TLBMISS_HANDLER_SETUP_PGD(mm->pgd);
kvm_mips_suspend_mm(cpu);
@ -1076,7 +1076,7 @@ static int kvm_trap_emul_vcpu_put(struct kvm_vcpu *vcpu, int cpu)
/* Restore normal Linux process memory map */
if (((cpu_context(cpu, current->mm) ^ asid_cache(cpu)) &
asid_version_mask(cpu)))
get_new_mmu_context(current->mm, cpu);
get_new_mmu_context(current->mm);
write_c0_entryhi(cpu_asid(cpu, current->mm));
TLBMISS_HANDLER_SETUP_PGD(current->mm->pgd);
kvm_mips_resume_mm(cpu);
@ -1113,7 +1113,7 @@ static void kvm_trap_emul_check_requests(struct kvm_vcpu *vcpu, int cpu,
/* Generate new ASID for current mode */
if (reload_asid) {
mm = KVM_GUEST_KERNEL_MODE(vcpu) ? kern_mm : user_mm;
get_new_mmu_context(mm, cpu);
get_new_mmu_context(mm);
htw_stop();
write_c0_entryhi(cpu_asid(cpu, mm));
TLBMISS_HANDLER_SETUP_PGD(mm->pgd);
@ -1230,7 +1230,7 @@ static void kvm_trap_emul_vcpu_reenter(struct kvm_run *run,
*/
if ((cpu_context(cpu, mm) ^ asid_cache(cpu)) &
asid_version_mask(cpu))
get_new_mmu_context(mm, cpu);
get_new_mmu_context(mm);
}
static int kvm_trap_emul_vcpu_run(struct kvm_run *run, struct kvm_vcpu *vcpu)
@ -1268,7 +1268,7 @@ static int kvm_trap_emul_vcpu_run(struct kvm_run *run, struct kvm_vcpu *vcpu)
/* Restore normal Linux process memory map */
if (((cpu_context(cpu, current->mm) ^ asid_cache(cpu)) &
asid_version_mask(cpu)))
get_new_mmu_context(current->mm, cpu);
get_new_mmu_context(current->mm);
write_c0_entryhi(cpu_asid(cpu, current->mm));
TLBMISS_HANDLER_SETUP_PGD(current->mm->pgd);
kvm_mips_resume_mm(cpu);

2
arch/mips/kvm/vz.c
View File

@ -2457,7 +2457,7 @@ static void kvm_vz_vcpu_load_tlb(struct kvm_vcpu *vcpu, int cpu)
if (cpumask_test_and_clear_cpu(cpu, &kvm->arch.asid_flush_mask)
|| (cpu_context(cpu, gpa_mm) ^ asid_cache(cpu)) &
asid_version_mask(cpu))
get_new_mmu_context(gpa_mm, cpu);
get_new_mmu_context(gpa_mm);
}
}