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Revert "MIPS: Allow ASID size to be determined at boot time."

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This reverts commit d532f3d267.

The original commit has several problems:

1) Doesn't work with 64-bit kernels.

2) Calls TLBMISS_HANDLER_SETUP() before the code is generated.

3) Calls TLBMISS_HANDLER_SETUP() twice in per_cpu_trap_init() when
   only one call is needed.

[ralf@linux-mips.org: Also revert the bits of the ASID patch which were
hidden in the KVM merge.]

Signed-off-by: David Daney <david.daney@cavium.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: "Steven J. Hill" <Steven.Hill@imgtec.com>
Cc: David Daney <david.daney@cavium.com>
Patchwork: https://patchwork.linux-mips.org/patch/5242/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
David Daney
2013-05-13 13:56:44 -07:00
committed by Ralf Baechle
parent 8ea6cd7af1
commit 48c4ac976a
13 changed files with 92 additions and 161 deletions
Download Patch File Download Diff File Expand all files Collapse all files

26
arch/mips/kvm/kvm_tlb.c
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@@ -51,13 +51,13 @@ EXPORT_SYMBOL(kvm_mips_is_error_pfn);
uint32_t kvm_mips_get_kernel_asid(struct kvm_vcpu *vcpu)
{
return ASID_MASK(vcpu->arch.guest_kernel_asid[smp_processor_id()]);
return vcpu->arch.guest_kernel_asid[smp_processor_id()] & ASID_MASK;
}
uint32_t kvm_mips_get_user_asid(struct kvm_vcpu *vcpu)
{
return ASID_MASK(vcpu->arch.guest_user_asid[smp_processor_id()]);
return vcpu->arch.guest_user_asid[smp_processor_id()] & ASID_MASK;
}
inline uint32_t kvm_mips_get_commpage_asid (struct kvm_vcpu *vcpu)
@@ -84,7 +84,7 @@ void kvm_mips_dump_host_tlbs(void)
old_pagemask = read_c0_pagemask();
printk("HOST TLBs:\n");
printk("ASID: %#lx\n", ASID_MASK(read_c0_entryhi()));
printk("ASID: %#lx\n", read_c0_entryhi() & ASID_MASK);
for (i = 0; i < current_cpu_data.tlbsize; i++) {
write_c0_index(i);
@@ -428,7 +428,7 @@ int kvm_mips_guest_tlb_lookup(struct kvm_vcpu *vcpu, unsigned long entryhi)
for (i = 0; i < KVM_MIPS_GUEST_TLB_SIZE; i++) {
if (((TLB_VPN2(tlb[i]) & ~tlb[i].tlb_mask) == ((entryhi & VPN2_MASK) & ~tlb[i].tlb_mask)) &&
(TLB_IS_GLOBAL(tlb[i]) || (TLB_ASID(tlb[i]) == ASID_MASK(entryhi)))) {
(TLB_IS_GLOBAL(tlb[i]) || (TLB_ASID(tlb[i]) == (entryhi & ASID_MASK)))) {
index = i;
break;
}
@@ -626,7 +626,7 @@ kvm_get_new_mmu_context(struct mm_struct *mm, unsigned long cpu,
{
unsigned long asid = asid_cache(cpu);
if (!(ASID_MASK(ASID_INC(asid)))) {
if (!((asid += ASID_INC) & ASID_MASK)) {
if (cpu_has_vtag_icache) {
flush_icache_all();
}
@@ -804,7 +804,8 @@ void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
if (!newasid) {
/* If we preempted while the guest was executing, then reload the pre-empted ASID */
if (current->flags & PF_VCPU) {
write_c0_entryhi(ASID_MASK(vcpu->arch.preempt_entryhi));
write_c0_entryhi(vcpu->arch.
preempt_entryhi & ASID_MASK);
ehb();
}
} else {
@@ -816,11 +817,13 @@ void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
*/
if (current->flags & PF_VCPU) {
if (KVM_GUEST_KERNEL_MODE(vcpu))
write_c0_entryhi(ASID_MASK(vcpu->arch.
guest_kernel_asid[cpu]));
write_c0_entryhi(vcpu->arch.
guest_kernel_asid[cpu] &
ASID_MASK);
else
write_c0_entryhi(ASID_MASK(vcpu->arch.
guest_user_asid[cpu]));
write_c0_entryhi(vcpu->arch.
guest_user_asid[cpu] &
ASID_MASK);
ehb();
}
}
@@ -879,7 +882,8 @@ uint32_t kvm_get_inst(uint32_t *opc, struct kvm_vcpu *vcpu)
kvm_mips_guest_tlb_lookup(vcpu,
((unsigned long) opc & VPN2_MASK)
|
ASID_MASK(kvm_read_c0_guest_entryhi(cop0)));
(kvm_read_c0_guest_entryhi
(cop0) & ASID_MASK));
if (index < 0) {
kvm_err
("%s: get_user_failed for %p, vcpu: %p, ASID: %#lx\n",