diff options
| -rw-r--r-- | include/linux/kvm_host.h | 24 |
1 files changed, 15 insertions, 9 deletions
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 07226f820e6..d2b897ee3ac 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -49,28 +49,34 @@ #define KVM_MAX_MMIO_FRAGMENTS \ (KVM_MMIO_SIZE / KVM_USER_MMIO_SIZE + KVM_EXTRA_MMIO_FRAGMENTS) -#define KVM_PFN_ERR_FAULT (-EFAULT) -#define KVM_PFN_ERR_HWPOISON (-EHWPOISON) -#define KVM_PFN_ERR_BAD (-ENOENT) +/* + * For the normal pfn, the highest 12 bits should be zero, + * so we can mask these bits to indicate the error. + */ +#define KVM_PFN_ERR_MASK (0xfffULL << 52) + +#define KVM_PFN_ERR_FAULT (KVM_PFN_ERR_MASK) +#define KVM_PFN_ERR_HWPOISON (KVM_PFN_ERR_MASK + 1) +#define KVM_PFN_ERR_BAD (KVM_PFN_ERR_MASK + 2) -static inline int is_error_pfn(pfn_t pfn) +static inline bool is_error_pfn(pfn_t pfn) { - return IS_ERR_VALUE(pfn); + return !!(pfn & KVM_PFN_ERR_MASK); } -static inline int is_noslot_pfn(pfn_t pfn) +static inline bool is_noslot_pfn(pfn_t pfn) { - return pfn == -ENOENT; + return pfn == KVM_PFN_ERR_BAD; } -static inline int is_invalid_pfn(pfn_t pfn) +static inline bool is_invalid_pfn(pfn_t pfn) { return !is_noslot_pfn(pfn) && is_error_pfn(pfn); } #define KVM_ERR_PTR_BAD_PAGE (ERR_PTR(-ENOENT)) -static inline int is_error_page(struct page *page) +static inline bool is_error_page(struct page *page) { return IS_ERR(page); } |