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Diffstat (limited to 'arch/powerpc/include/asm/kvm_book3s_64.h')
-rw-r--r--arch/powerpc/include/asm/kvm_book3s_64.h36
1 files changed, 13 insertions, 23 deletions
diff --git a/arch/powerpc/include/asm/kvm_book3s_64.h b/arch/powerpc/include/asm/kvm_book3s_64.h
index 7529aab06..1f4497fb5 100644
--- a/arch/powerpc/include/asm/kvm_book3s_64.h
+++ b/arch/powerpc/include/asm/kvm_book3s_64.h
@@ -276,19 +276,24 @@ static inline unsigned long hpte_make_readonly(unsigned long ptel)
return ptel;
}
-static inline int hpte_cache_flags_ok(unsigned long ptel, unsigned long io_type)
+static inline bool hpte_cache_flags_ok(unsigned long hptel, bool is_ci)
{
- unsigned int wimg = ptel & HPTE_R_WIMG;
+ unsigned int wimg = hptel & HPTE_R_WIMG;
/* Handle SAO */
if (wimg == (HPTE_R_W | HPTE_R_I | HPTE_R_M) &&
cpu_has_feature(CPU_FTR_ARCH_206))
wimg = HPTE_R_M;
- if (!io_type)
+ if (!is_ci)
return wimg == HPTE_R_M;
-
- return (wimg & (HPTE_R_W | HPTE_R_I)) == io_type;
+ /*
+ * if host is mapped cache inhibited, make sure hptel also have
+ * cache inhibited.
+ */
+ if (wimg & HPTE_R_W) /* FIXME!! is this ok for all guest. ? */
+ return false;
+ return !!(wimg & HPTE_R_I);
}
/*
@@ -305,9 +310,9 @@ static inline pte_t kvmppc_read_update_linux_pte(pte_t *ptep, int writing)
*/
old_pte = READ_ONCE(*ptep);
/*
- * wait until _PAGE_BUSY is clear then set it atomically
+ * wait until H_PAGE_BUSY is clear then set it atomically
*/
- if (unlikely(pte_val(old_pte) & _PAGE_BUSY)) {
+ if (unlikely(pte_val(old_pte) & H_PAGE_BUSY)) {
cpu_relax();
continue;
}
@@ -319,27 +324,12 @@ static inline pte_t kvmppc_read_update_linux_pte(pte_t *ptep, int writing)
if (writing && pte_write(old_pte))
new_pte = pte_mkdirty(new_pte);
- if (pte_val(old_pte) == __cmpxchg_u64((unsigned long *)ptep,
- pte_val(old_pte),
- pte_val(new_pte))) {
+ if (pte_xchg(ptep, old_pte, new_pte))
break;
- }
}
return new_pte;
}
-
-/* Return HPTE cache control bits corresponding to Linux pte bits */
-static inline unsigned long hpte_cache_bits(unsigned long pte_val)
-{
-#if _PAGE_NO_CACHE == HPTE_R_I && _PAGE_WRITETHRU == HPTE_R_W
- return pte_val & (HPTE_R_W | HPTE_R_I);
-#else
- return ((pte_val & _PAGE_NO_CACHE) ? HPTE_R_I : 0) +
- ((pte_val & _PAGE_WRITETHRU) ? HPTE_R_W : 0);
-#endif
-}
-
static inline bool hpte_read_permission(unsigned long pp, unsigned long key)
{
if (key)