diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/mips/include/asm/mmu_context.h | 4 | ||||
| -rw-r--r-- | arch/mips/kvm/entry.c | 16 | ||||
| -rw-r--r-- | arch/mips/kvm/trap_emul.c | 10 |
3 files changed, 24 insertions, 6 deletions
diff --git a/arch/mips/include/asm/mmu_context.h b/arch/mips/include/asm/mmu_context.h index ddd57ade1aa8..16eb8521398e 100644 --- a/arch/mips/include/asm/mmu_context.h +++ b/arch/mips/include/asm/mmu_context.h @@ -29,9 +29,11 @@ do { \ } \ } while (0) +extern void tlbmiss_handler_setup_pgd(unsigned long); + +/* Note: This is also implemented with uasm in arch/mips/kvm/entry.c */ #define TLBMISS_HANDLER_SETUP_PGD(pgd) \ do { \ - extern void tlbmiss_handler_setup_pgd(unsigned long); \ tlbmiss_handler_setup_pgd((unsigned long)(pgd)); \ htw_set_pwbase((unsigned long)pgd); \ } while (0) diff --git a/arch/mips/kvm/entry.c b/arch/mips/kvm/entry.c index f81888704caa..f683d123172c 100644 --- a/arch/mips/kvm/entry.c +++ b/arch/mips/kvm/entry.c @@ -13,6 +13,7 @@ #include <linux/kvm_host.h> #include <linux/log2.h> +#include <asm/mmu_context.h> #include <asm/msa.h> #include <asm/setup.h> #include <asm/uasm.h> @@ -316,7 +317,20 @@ static void *kvm_mips_build_enter_guest(void *addr) #else uasm_i_andi(&p, K0, K0, MIPS_ENTRYHI_ASID); #endif - uasm_i_mtc0(&p, K0, C0_ENTRYHI); + + /* + * Set up KVM T&E GVA pgd. + * This does roughly the same as TLBMISS_HANDLER_SETUP_PGD(): + * - call tlbmiss_handler_setup_pgd(mm->pgd) + * - but skips write into CP0_PWBase for now + */ + UASM_i_LW(&p, A0, (int)offsetof(struct mm_struct, pgd) - + (int)offsetof(struct mm_struct, context.asid), T1); + + UASM_i_LA(&p, T9, (unsigned long)tlbmiss_handler_setup_pgd); + uasm_i_jalr(&p, RA, T9); + uasm_i_mtc0(&p, K0, C0_ENTRYHI); + uasm_i_ehb(&p); /* Disable RDHWR access */ diff --git a/arch/mips/kvm/trap_emul.c b/arch/mips/kvm/trap_emul.c index 183150a963ec..f39d427649dc 100644 --- a/arch/mips/kvm/trap_emul.c +++ b/arch/mips/kvm/trap_emul.c @@ -704,6 +704,7 @@ static int kvm_trap_emul_vcpu_load(struct kvm_vcpu *vcpu, int cpu) { struct mm_struct *kern_mm = &vcpu->arch.guest_kernel_mm; struct mm_struct *user_mm = &vcpu->arch.guest_user_mm; + struct mm_struct *mm; /* Allocate new kernel and user ASIDs if needed */ @@ -733,10 +734,9 @@ static int kvm_trap_emul_vcpu_load(struct kvm_vcpu *vcpu, int cpu) * on the mode of the Guest (Kernel/User) */ if (current->flags & PF_VCPU) { - if (KVM_GUEST_KERNEL_MODE(vcpu)) - write_c0_entryhi(cpu_asid(cpu, kern_mm)); - else - write_c0_entryhi(cpu_asid(cpu, user_mm)); + mm = KVM_GUEST_KERNEL_MODE(vcpu) ? kern_mm : user_mm; + write_c0_entryhi(cpu_asid(cpu, mm)); + TLBMISS_HANDLER_SETUP_PGD(mm->pgd); kvm_mips_suspend_mm(cpu); ehb(); } @@ -757,6 +757,7 @@ static int kvm_trap_emul_vcpu_put(struct kvm_vcpu *vcpu, int cpu) get_new_mmu_context(current->mm, cpu); } write_c0_entryhi(cpu_asid(cpu, current->mm)); + TLBMISS_HANDLER_SETUP_PGD(current->mm->pgd); kvm_mips_resume_mm(cpu); ehb(); } @@ -821,6 +822,7 @@ static int kvm_trap_emul_vcpu_run(struct kvm_run *run, struct kvm_vcpu *vcpu) asid_version_mask(cpu))) get_new_mmu_context(current->mm, cpu); write_c0_entryhi(cpu_asid(cpu, current->mm)); + TLBMISS_HANDLER_SETUP_PGD(current->mm->pgd); kvm_mips_resume_mm(cpu); htw_start(); |