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authorJames Hogan <james.hogan@imgtec.com>2016-09-11 01:55:07 +0300
committerJames Hogan <james.hogan@imgtec.com>2017-02-03 18:19:01 +0300
commit722b45443146f425453525d3c2270ff2733f5dc4 (patch)
tree6f4d172bf3da8f433b3b9d8942dbf02ebf270e21 /arch/mips/include/asm/tlbex.h
parent93a93c2461f9416a58c7d1e32fec201af8cc3aad (diff)
downloadlinux-722b45443146f425453525d3c2270ff2733f5dc4.tar.xz
MIPS: Export some tlbex internals for KVM to use
Export to TLB exception code generating functions so that KVM can construct a fast TLB refill handler for guest context without reinventing the wheel quite so much. Signed-off-by: James Hogan <james.hogan@imgtec.com> Acked-by: Ralf Baechle <ralf@linux-mips.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: "Radim Krčmář" <rkrcmar@redhat.com> Cc: linux-mips@linux-mips.org Cc: kvm@vger.kernel.org
Diffstat (limited to 'arch/mips/include/asm/tlbex.h')
-rw-r--r--arch/mips/include/asm/tlbex.h26
1 files changed, 26 insertions, 0 deletions
diff --git a/arch/mips/include/asm/tlbex.h b/arch/mips/include/asm/tlbex.h
new file mode 100644
index 000000000000..53050e9dd2c9
--- /dev/null
+++ b/arch/mips/include/asm/tlbex.h
@@ -0,0 +1,26 @@
+#ifndef __ASM_TLBEX_H
+#define __ASM_TLBEX_H
+
+#include <asm/uasm.h>
+
+/*
+ * Write random or indexed TLB entry, and care about the hazards from
+ * the preceding mtc0 and for the following eret.
+ */
+enum tlb_write_entry {
+ tlb_random,
+ tlb_indexed
+};
+
+extern int pgd_reg;
+
+void build_get_pmde64(u32 **p, struct uasm_label **l, struct uasm_reloc **r,
+ unsigned int tmp, unsigned int ptr);
+void build_get_pgde32(u32 **p, unsigned int tmp, unsigned int ptr);
+void build_get_ptep(u32 **p, unsigned int tmp, unsigned int ptr);
+void build_update_entries(u32 **p, unsigned int tmp, unsigned int ptep);
+void build_tlb_write_entry(u32 **p, struct uasm_label **l,
+ struct uasm_reloc **r,
+ enum tlb_write_entry wmode);
+
+#endif /* __ASM_TLBEX_H */