Add a new method to CPUClass which the memory system core can
use to obtain the correct address space index to use for a memory
access with a given set of transaction attributes, together
with the wrapper function cpu_asidx_from_attrs() which implements
the default behaviour ("always use asidx 0") for CPU classes
which don't provide the method.
Signed-off-by: Peter Maydell <peter.mayd...@linaro.org>
Acked-by: Edgar E. Iglesias <edgar.igles...@xilinx.com>
---
include/qom/cpu.h | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/include/qom/cpu.h b/include/qom/cpu.h
index 58605a5..ed23246 100644
--- a/include/qom/cpu.h
+++ b/include/qom/cpu.h
@@ -102,6 +102,8 @@ struct TranslationBlock;
* associated memory transaction attributes to use for the access.
* CPUs which use memory transaction attributes should implement this
* instead of get_phys_page_debug.
+ * @asidx_from_attrs: Callback to return the CPU AddressSpace to use for
+ * a memory access with the specified memory transaction attributes.
* @gdb_read_register: Callback for letting GDB read a register.
* @gdb_write_register: Callback for letting GDB write a register.
* @debug_excp_handler: Callback for handling debug exceptions.
@@ -158,6 +160,7 @@ typedef struct CPUClass {
hwaddr (*get_phys_page_debug)(CPUState *cpu, vaddr addr);
hwaddr (*get_phys_page_attrs_debug)(CPUState *cpu, vaddr addr,
MemTxAttrs *attrs);
+ int (*asidx_from_attrs)(CPUState *cpu, MemTxAttrs attrs);
int (*gdb_read_register)(CPUState *cpu, uint8_t *buf, int reg);
int (*gdb_write_register)(CPUState *cpu, uint8_t *buf, int reg);
void (*debug_excp_handler)(CPUState *cpu);
@@ -492,6 +495,23 @@ static inline hwaddr cpu_get_phys_page_debug(CPUState
*cpu, vaddr addr)
return cpu_get_phys_page_attrs_debug(cpu, addr, &attrs);
}
+
+/** cpu_asidx_from_attrs:
+ * @cpu: CPU
+ * @attrs: memory transaction attributes
+ *
+ * Returns the address space index specifying the CPU AddressSpace
+ * to use for a memory access with the given transaction attributes.
+ */
+static inline int cpu_asidx_from_attrs(CPUState *cpu, MemTxAttrs attrs)
+{
+ CPUClass *cc = CPU_GET_CLASS(cpu);
+
+ if (cc->asidx_from_attrs) {
+ return cc->asidx_from_attrs(cpu, attrs);
+ }
+ return 0;
+}
#endif
/**
--
1.9.1
