diff options
Diffstat (limited to 'arch/powerpc/include/asm/kvm_book3s_64.h')
| -rw-r--r-- | arch/powerpc/include/asm/kvm_book3s_64.h | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/arch/powerpc/include/asm/kvm_book3s_64.h b/arch/powerpc/include/asm/kvm_book3s_64.h index c21e46da4a3b..b0c08b142770 100644 --- a/arch/powerpc/include/asm/kvm_book3s_64.h +++ b/arch/powerpc/include/asm/kvm_book3s_64.h @@ -121,6 +121,22 @@ static inline unsigned long hpte_rpn(unsigned long ptel, unsigned long psize) return ((ptel & HPTE_R_RPN) & ~(psize - 1)) >> PAGE_SHIFT; } +static inline int hpte_is_writable(unsigned long ptel) +{ + unsigned long pp = ptel & (HPTE_R_PP0 | HPTE_R_PP); + + return pp != PP_RXRX && pp != PP_RXXX; +} + +static inline unsigned long hpte_make_readonly(unsigned long ptel) +{ + if ((ptel & HPTE_R_PP0) || (ptel & HPTE_R_PP) == PP_RWXX) + ptel = (ptel & ~HPTE_R_PP) | PP_RXXX; + else + ptel |= PP_RXRX; + return ptel; +} + static inline int hpte_cache_flags_ok(unsigned long ptel, unsigned long io_type) { unsigned int wimg = ptel & HPTE_R_WIMG; @@ -140,7 +156,7 @@ static inline int hpte_cache_flags_ok(unsigned long ptel, unsigned long io_type) * Lock and read a linux PTE. If it's present and writable, atomically * set dirty and referenced bits and return the PTE, otherwise return 0. */ -static inline pte_t kvmppc_read_update_linux_pte(pte_t *p) +static inline pte_t kvmppc_read_update_linux_pte(pte_t *p, int writing) { pte_t pte, tmp; @@ -158,7 +174,7 @@ static inline pte_t kvmppc_read_update_linux_pte(pte_t *p) if (pte_present(pte)) { pte = pte_mkyoung(pte); - if (pte_write(pte)) + if (writing && pte_write(pte)) pte = pte_mkdirty(pte); } |