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MIPS: Retrieve ASID masks using function accepting struct cpuinfo_mips

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In preparation for supporting variable ASID masks, retrieve ASID masks
using functions in asm/cpu-info.h which accept struct cpuinfo_mips. This
will allow those functions to determine the ASID mask based upon the CPU
in a later patch. This also allows for the r3k & r8k cases to be handled
in Kconfig, which is arguably cleaner than the previous #ifdefs.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13210/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Paul Burton
2016-05-06 14:36:23 +01:00
committed by Ralf Baechle
parent f1b711c638
commit 4edf00a46b
10 changed files with 92 additions and 61 deletions
Download Patch File Download Diff File Expand all files Collapse all files

30
arch/mips/kvm/tlb.c
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@@ -49,12 +49,18 @@ EXPORT_SYMBOL_GPL(kvm_mips_is_error_pfn);
uint32_t kvm_mips_get_kernel_asid(struct kvm_vcpu *vcpu)
{
return vcpu->arch.guest_kernel_asid[smp_processor_id()] & ASID_MASK;
int cpu = smp_processor_id();
return vcpu->arch.guest_kernel_asid[cpu] &
cpu_asid_mask(&cpu_data[cpu]);
}
uint32_t kvm_mips_get_user_asid(struct kvm_vcpu *vcpu)
{
return vcpu->arch.guest_user_asid[smp_processor_id()] & ASID_MASK;
int cpu = smp_processor_id();
return vcpu->arch.guest_user_asid[cpu] &
cpu_asid_mask(&cpu_data[cpu]);
}
inline uint32_t kvm_mips_get_commpage_asid(struct kvm_vcpu *vcpu)
@@ -78,7 +84,8 @@ void kvm_mips_dump_host_tlbs(void)
old_pagemask = read_c0_pagemask();
kvm_info("HOST TLBs:\n");
kvm_info("ASID: %#lx\n", read_c0_entryhi() & ASID_MASK);
kvm_info("ASID: %#lx\n", read_c0_entryhi() &
cpu_asid_mask(&current_cpu_data));
for (i = 0; i < current_cpu_data.tlbsize; i++) {
write_c0_index(i);
@@ -564,15 +571,15 @@ void kvm_get_new_mmu_context(struct mm_struct *mm, unsigned long cpu,
{
unsigned long asid = asid_cache(cpu);
asid += ASID_INC;
if (!(asid & ASID_MASK)) {
asid += cpu_asid_inc();
if (!(asid & cpu_asid_mask(&cpu_data[cpu]))) {
if (cpu_has_vtag_icache)
flush_icache_all();
kvm_local_flush_tlb_all(); /* start new asid cycle */
if (!asid) /* fix version if needed */
asid = ASID_FIRST_VERSION;
asid = asid_first_version(cpu);
}
cpu_context(cpu, mm) = asid_cache(cpu) = asid;
@@ -627,6 +634,7 @@ static void kvm_mips_migrate_count(struct kvm_vcpu *vcpu)
/* Restore ASID once we are scheduled back after preemption */
void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
{
unsigned long asid_mask = cpu_asid_mask(&cpu_data[cpu]);
unsigned long flags;
int newasid = 0;
@@ -637,7 +645,7 @@ void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
local_irq_save(flags);
if ((vcpu->arch.guest_kernel_asid[cpu] ^ asid_cache(cpu)) &
ASID_VERSION_MASK) {
asid_version_mask(cpu)) {
kvm_get_new_mmu_context(&vcpu->arch.guest_kernel_mm, cpu, vcpu);
vcpu->arch.guest_kernel_asid[cpu] =
vcpu->arch.guest_kernel_mm.context.asid[cpu];
@@ -672,7 +680,7 @@ void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
*/
if (current->flags & PF_VCPU) {
write_c0_entryhi(vcpu->arch.
preempt_entryhi & ASID_MASK);
preempt_entryhi & asid_mask);
ehb();
}
} else {
@@ -687,11 +695,11 @@ void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
if (KVM_GUEST_KERNEL_MODE(vcpu))
write_c0_entryhi(vcpu->arch.
guest_kernel_asid[cpu] &
ASID_MASK);
asid_mask);
else
write_c0_entryhi(vcpu->arch.
guest_user_asid[cpu] &
ASID_MASK);
asid_mask);
ehb();
}
}
@@ -721,7 +729,7 @@ void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
kvm_mips_callbacks->vcpu_get_regs(vcpu);
if (((cpu_context(cpu, current->mm) ^ asid_cache(cpu)) &
ASID_VERSION_MASK)) {
asid_version_mask(cpu))) {
kvm_debug("%s: Dropping MMU Context: %#lx\n", __func__,
cpu_context(cpu, current->mm));
drop_mmu_context(current->mm, cpu);