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| author | James Hogan <james.hogan@imgtec.com> | 2016-12-16 15:57:00 +0000 |
|---|---|---|
| committer | James Hogan <james.hogan@imgtec.com> | 2017-02-03 15:20:55 +0000 |
| commit | a31b50d741bd85a127d5ef2c21c0788041bc41a9 (patch) | |
| tree | e67fc587b0eb2d038b20f3b9b67be6a5bdf868b5 /arch/mips/include | |
| parent | 57e3869cfaaec712f6ea1855ab7ba868f6f306ed (diff) | |
| download | linux-a31b50d741bd85a127d5ef2c21c0788041bc41a9.tar.bz2 | |
KVM: MIPS/MMU: Invalidate GVA PTs on ASID changes
Implement invalidation of large ranges of virtual addresses from GVA
page tables in response to a guest ASID change (immediately for guest
kernel page table, lazily for guest user page table).
We iterate through a range of page tables invalidating entries and
freeing fully invalidated tables. To minimise overhead the exact ranges
invalidated depends on the flags argument to kvm_mips_flush_gva_pt(),
which also allows it to be used in future KVM_CAP_SYNC_MMU patches in
response to GPA changes, which unlike guest TLB mapping changes affects
guest KSeg0 mappings.
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/include')
| -rw-r--r-- | arch/mips/include/asm/kvm_host.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/mips/include/asm/kvm_host.h b/arch/mips/include/asm/kvm_host.h index fb2ea578c193..f5145dcab319 100644 --- a/arch/mips/include/asm/kvm_host.h +++ b/arch/mips/include/asm/kvm_host.h @@ -614,6 +614,23 @@ extern int kvm_mips_host_tlb_lookup(struct kvm_vcpu *vcpu, unsigned long vaddr); void kvm_mips_suspend_mm(int cpu); void kvm_mips_resume_mm(int cpu); +/* MMU handling */ + +/** + * enum kvm_mips_flush - Types of MMU flushes. + * @KMF_USER: Flush guest user virtual memory mappings. + * Guest USeg only. + * @KMF_KERN: Flush guest kernel virtual memory mappings. + * Guest USeg and KSeg2/3. + * @KMF_GPA: Flush guest physical memory mappings. + * Also includes KSeg0 if KMF_KERN is set. + */ +enum kvm_mips_flush { + KMF_USER = 0x0, + KMF_KERN = 0x1, + KMF_GPA = 0x2, +}; +void kvm_mips_flush_gva_pt(pgd_t *pgd, enum kvm_mips_flush flags); extern unsigned long kvm_mips_translate_guest_kseg0_to_hpa(struct kvm_vcpu *vcpu, unsigned long gva); extern void kvm_get_new_mmu_context(struct mm_struct *mm, unsigned long cpu, |