summaryrefslogtreecommitdiffstats
path: root/arch/mips/include
diff options
context:
space:
mode:
authorJames Hogan <james.hogan@imgtec.com>2017-02-09 15:20:06 +0000
committerJames Hogan <james.hogan@imgtec.com>2017-02-13 18:57:31 +0000
commitf700a420088624671ed955bf818c17012bb57bca (patch)
treeedb0148c355db8c8f02b550181a250e94e8c93db /arch/mips/include
parent98e58b01e1671e5784c67972ec1b58a8997f784e (diff)
parent7170bdc777556dad87f92e6a73a6cc557bf3290e (diff)
downloadlinux-f700a420088624671ed955bf818c17012bb57bca.tar.bz2
Merge tag 'mips_kvm_4.11_1' into mips-for-linux-next
MIPS dependencies for KVM Miscellaneous MIPS architecture changes depended on by the MIPS KVM changes in the KVM tree. - Move pgd_alloc() out of header. - Exports so KVM can access page table management and TLBEX functions. - Add return errors to protected cache ops.
Diffstat (limited to 'arch/mips/include')
-rw-r--r--arch/mips/include/asm/pgalloc.h16
-rw-r--r--arch/mips/include/asm/r4kcache.h55
-rw-r--r--arch/mips/include/asm/tlbex.h26
-rw-r--r--arch/mips/include/asm/uasm.h5
4 files changed, 67 insertions, 35 deletions
diff --git a/arch/mips/include/asm/pgalloc.h b/arch/mips/include/asm/pgalloc.h
index a03e86969f78..a8705f6c8180 100644
--- a/arch/mips/include/asm/pgalloc.h
+++ b/arch/mips/include/asm/pgalloc.h
@@ -43,21 +43,7 @@ static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
* Initialize a new pgd / pmd table with invalid pointers.
*/
extern void pgd_init(unsigned long page);
-
-static inline pgd_t *pgd_alloc(struct mm_struct *mm)
-{
- pgd_t *ret, *init;
-
- ret = (pgd_t *) __get_free_pages(GFP_KERNEL, PGD_ORDER);
- if (ret) {
- init = pgd_offset(&init_mm, 0UL);
- pgd_init((unsigned long)ret);
- memcpy(ret + USER_PTRS_PER_PGD, init + USER_PTRS_PER_PGD,
- (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
- }
-
- return ret;
-}
+extern pgd_t *pgd_alloc(struct mm_struct *mm);
static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
{
diff --git a/arch/mips/include/asm/r4kcache.h b/arch/mips/include/asm/r4kcache.h
index b42b513007a2..7227c158cbf8 100644
--- a/arch/mips/include/asm/r4kcache.h
+++ b/arch/mips/include/asm/r4kcache.h
@@ -147,49 +147,64 @@ static inline void flush_scache_line(unsigned long addr)
}
#define protected_cache_op(op,addr) \
+({ \
+ int __err = 0; \
__asm__ __volatile__( \
" .set push \n" \
" .set noreorder \n" \
" .set "MIPS_ISA_ARCH_LEVEL" \n" \
- "1: cache %0, (%1) \n" \
+ "1: cache %1, (%2) \n" \
"2: .set pop \n" \
+ " .section .fixup,\"ax\" \n" \
+ "3: li %0, %3 \n" \
+ " j 2b \n" \
+ " .previous \n" \
" .section __ex_table,\"a\" \n" \
- " "STR(PTR)" 1b, 2b \n" \
+ " "STR(PTR)" 1b, 3b \n" \
" .previous" \
- : \
- : "i" (op), "r" (addr))
+ : "+r" (__err) \
+ : "i" (op), "r" (addr), "i" (-EFAULT)); \
+ __err; \
+})
+
#define protected_cachee_op(op,addr) \
+({ \
+ int __err = 0; \
__asm__ __volatile__( \
" .set push \n" \
" .set noreorder \n" \
" .set mips0 \n" \
" .set eva \n" \
- "1: cachee %0, (%1) \n" \
+ "1: cachee %1, (%2) \n" \
"2: .set pop \n" \
+ " .section .fixup,\"ax\" \n" \
+ "3: li %0, %3 \n" \
+ " j 2b \n" \
+ " .previous \n" \
" .section __ex_table,\"a\" \n" \
- " "STR(PTR)" 1b, 2b \n" \
+ " "STR(PTR)" 1b, 3b \n" \
" .previous" \
- : \
- : "i" (op), "r" (addr))
+ : "+r" (__err) \
+ : "i" (op), "r" (addr), "i" (-EFAULT)); \
+ __err; \
+})
/*
* The next two are for badland addresses like signal trampolines.
*/
-static inline void protected_flush_icache_line(unsigned long addr)
+static inline int protected_flush_icache_line(unsigned long addr)
{
switch (boot_cpu_type()) {
case CPU_LOONGSON2:
- protected_cache_op(Hit_Invalidate_I_Loongson2, addr);
- break;
+ return protected_cache_op(Hit_Invalidate_I_Loongson2, addr);
default:
#ifdef CONFIG_EVA
- protected_cachee_op(Hit_Invalidate_I, addr);
+ return protected_cachee_op(Hit_Invalidate_I, addr);
#else
- protected_cache_op(Hit_Invalidate_I, addr);
+ return protected_cache_op(Hit_Invalidate_I, addr);
#endif
- break;
}
}
@@ -199,21 +214,21 @@ static inline void protected_flush_icache_line(unsigned long addr)
* caches. We're talking about one cacheline unnecessarily getting invalidated
* here so the penalty isn't overly hard.
*/
-static inline void protected_writeback_dcache_line(unsigned long addr)
+static inline int protected_writeback_dcache_line(unsigned long addr)
{
#ifdef CONFIG_EVA
- protected_cachee_op(Hit_Writeback_Inv_D, addr);
+ return protected_cachee_op(Hit_Writeback_Inv_D, addr);
#else
- protected_cache_op(Hit_Writeback_Inv_D, addr);
+ return protected_cache_op(Hit_Writeback_Inv_D, addr);
#endif
}
-static inline void protected_writeback_scache_line(unsigned long addr)
+static inline int protected_writeback_scache_line(unsigned long addr)
{
#ifdef CONFIG_EVA
- protected_cachee_op(Hit_Writeback_Inv_SD, addr);
+ return protected_cachee_op(Hit_Writeback_Inv_SD, addr);
#else
- protected_cache_op(Hit_Writeback_Inv_SD, addr);
+ return protected_cache_op(Hit_Writeback_Inv_SD, addr);
#endif
}
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 */
diff --git a/arch/mips/include/asm/uasm.h b/arch/mips/include/asm/uasm.h
index f7929f65f7ca..e9a9e2ade1d2 100644
--- a/arch/mips/include/asm/uasm.h
+++ b/arch/mips/include/asm/uasm.h
@@ -9,6 +9,9 @@
* Copyright (C) 2012, 2013 MIPS Technologies, Inc. All rights reserved.
*/
+#ifndef __ASM_UASM_H
+#define __ASM_UASM_H
+
#include <linux/types.h>
#ifdef CONFIG_EXPORT_UASM
@@ -309,3 +312,5 @@ void uasm_il_bltz(u32 **p, struct uasm_reloc **r, unsigned int reg, int lid);
void uasm_il_bne(u32 **p, struct uasm_reloc **r, unsigned int reg1,
unsigned int reg2, int lid);
void uasm_il_bnez(u32 **p, struct uasm_reloc **r, unsigned int reg, int lid);
+
+#endif /* __ASM_UASM_H */