include: sbi: Add Smepmp specific access flags for PMP entries

Smepmp specification defines a truth table based on which the access is allowed to
different modes. This patch adds different flags based on this truth table.

Signed-off-by: Himanshu Chauhan <hchauhan@ventanamicro.com>
Reviewed-by: Anup Patel <anup@brainfault.org>

diff --git a/include/sbi/sbi_domain.h b/include/sbi/sbi_domain.h
index b05bcf4d1c9b35a1f0102adebacf334a8a7d2394..da2a65a4d44c50886049ce3cf1dc91e114774a2b 100644 (file)
--- a/include/sbi/sbi_domain.h
+++ b/include/sbi/sbi_domain.h
@@ -43,6 +43,84 @@ struct sbi_domain_memregion {
 #define SBI_DOMAIN_MEMREGION_SU_WRITABLE       (1UL << 4)
 #define SBI_DOMAIN_MEMREGION_SU_EXECUTABLE     (1UL << 5)
 
+#define SBI_DOMAIN_MEMREGION_ACCESS_MASK       (0x3fUL)
+#define SBI_DOMAIN_MEMREGION_M_ACCESS_MASK     (0x7UL)
+#define SBI_DOMAIN_MEMREGION_SU_ACCESS_MASK    (0x38UL)
+
+#define SBI_DOMAIN_MEMREGION_SU_ACCESS_SHIFT   (3)
+
+#define SBI_DOMAIN_MEMREGION_SHARED_RDONLY             \
+               (SBI_DOMAIN_MEMREGION_M_READABLE |      \
+                SBI_DOMAIN_MEMREGION_SU_READABLE)
+
+#define SBI_DOMAIN_MEMREGION_SHARED_SUX_MRX            \
+               (SBI_DOMAIN_MEMREGION_M_READABLE   |    \
+                SBI_DOMAIN_MEMREGION_M_EXECUTABLE |    \
+                SBI_DOMAIN_MEMREGION_SU_EXECUTABLE)
+
+#define SBI_DOMAIN_MEMREGION_SHARED_SUX_MX             \
+               (SBI_DOMAIN_MEMREGION_M_EXECUTABLE |    \
+                SBI_DOMAIN_MEMREGION_SU_EXECUTABLE)
+
+#define SBI_DOMAIN_MEMREGION_SHARED_SURW_MRW           \
+               (SBI_DOMAIN_MEMREGION_M_READABLE |      \
+                SBI_DOMAIN_MEMREGION_M_WRITABLE |      \
+                SBI_DOMAIN_MEMREGION_SU_READABLE|      \
+                SBI_DOMAIN_MEMREGION_SU_WRITABLE)
+
+#define SBI_DOMAIN_MEMREGION_SHARED_SUR_MRW            \
+               (SBI_DOMAIN_MEMREGION_M_READABLE |      \
+                SBI_DOMAIN_MEMREGION_M_WRITABLE |      \
+                SBI_DOMAIN_MEMREGION_SU_READABLE)
+
+       /* Shared read-only region between M and SU mode */
+#define SBI_DOMAIN_MEMREGION_IS_SUR_MR(__flags)                        \
+               ((__flags & SBI_DOMAIN_MEMREGION_M_READABLE) && \
+                (__flags & SBI_DOMAIN_MEMREGION_SU_READABLE))
+
+       /* Shared region: SU execute-only and M read/execute */
+#define SBI_DOMAIN_MEMREGION_IS_SUX_MRX(__flags)                       \
+               ((__flags & SBI_DOMAIN_MEMREGION_M_READABLE) &&         \
+                (__flags & SBI_DOMAIN_MEMREGION_M_EXECUTABLE) &&       \
+                (__flags & SBI_DOMAIN_MEMREGION_SU_EXECUTABLE))
+
+       /* Shared region: SU and M execute-only */
+#define SBI_DOMAIN_MEMREGION_IS_SUX_MX(__flags)                                \
+               ((__flags & SBI_DOMAIN_MEMREGION_M_EXECUTABLE) &&       \
+                (__flags & SBI_DOMAIN_MEMREGION_SU_EXECUTABLE))
+
+       /* Shared region: SU and M read/write */
+#define SBI_DOMAIN_MEMREGION_IS_SURW_MRW(__flags)              \
+               ((__flags & SBI_DOMAIN_MEMREGION_M_READABLE) && \
+                (__flags & SBI_DOMAIN_MEMREGION_M_WRITABLE) && \
+                (__flags & SBI_DOMAIN_MEMREGION_SU_READABLE) & \
+                (__flags & SBI_DOMAIN_MEMREGION_SU_WRITABLE))
+
+       /* Shared region: SU read-only and M read/write */
+#define SBI_DOMAIN_MEMREGION_IS_SUR_MRW(__flags)               \
+               ((__flags & SBI_DOMAIN_MEMREGION_M_READABLE) && \
+                (__flags & SBI_DOMAIN_MEMREGION_M_WRITABLE) && \
+                (__flags & SBI_DOMAIN_MEMREGION_SU_READABLE))
+
+       /*
+        * Check if region flags match with any of the above
+        * mentioned shared region type
+        */
+#define SBI_DOMAIN_MEMREGION_IS_SHARED(_flags)                 \
+               (SBI_DOMAIN_MEMREGION_IS_SUR_MR(_flags)  ||     \
+                SBI_DOMAIN_MEMREGION_IS_SUX_MRX(_flags) ||     \
+                SBI_DOMAIN_MEMREGION_IS_SUX_MX(_flags)  ||     \
+                SBI_DOMAIN_MEMREGION_IS_SURW_MRW(_flags)||     \
+                SBI_DOMAIN_MEMREGION_IS_SUR_MRW(_flags))
+
+#define SBI_DOMAIN_MEMREGION_M_ONLY_ACCESS(__flags)                    \
+               ((__flags & SBI_DOMAIN_MEMREGION_M_ACCESS_MASK) &&      \
+                !(__flags & SBI_DOMAIN_MEMREGION_SU_ACCESS_MASK))
+
+#define SBI_DOMAIN_MEMREGION_SU_ONLY_ACCESS(__flags)                   \
+               ((__flags & SBI_DOMAIN_MEMREGION_SU_ACCESS_MASK)  &&    \
+                !(__flags & SBI_DOMAIN_MEMREGION_M_ACCESS_MASK))
+
 /** Bit to control if permissions are enforced on all modes */
 #define SBI_DOMAIN_MEMREGION_ENF_PERMISSIONS   (1UL << 6)
 
@@ -78,12 +156,6 @@ struct sbi_domain_memregion {
                                (SBI_DOMAIN_MEMREGION_SU_EXECUTABLE | \
                                 SBI_DOMAIN_MEMREGION_M_EXECUTABLE)
 
-#define SBI_DOMAIN_MEMREGION_ACCESS_MASK       (0x3fUL)
-#define SBI_DOMAIN_MEMREGION_M_ACCESS_MASK     (0x7UL)
-#define SBI_DOMAIN_MEMREGION_SU_ACCESS_MASK    (0x38UL)
-
-#define SBI_DOMAIN_MEMREGION_SU_ACCESS_SHIFT   (3)
-
 #define SBI_DOMAIN_MEMREGION_MMIO              (1UL << 31)
        unsigned long flags;
 };