From: Rui Qi <qirui.001@xxxxxxxxxxxxx>
we need arch_apei_get_mem_attribute to get protection bits
for a given physical address. These protection
bits are then used to map the physical address.
Signed-off-by: Rui Qi <qirui.001@xxxxxxxxxxxxx>
---
arch/riscv/include/asm/acpi.h | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/arch/riscv/include/asm/acpi.h b/arch/riscv/include/asm/acpi.h
index 6e13695120bc..c35dd4e5a84d 100644
--- a/arch/riscv/include/asm/acpi.h
+++ b/arch/riscv/include/asm/acpi.h
@@ -90,6 +90,24 @@ static inline void acpi_get_cbo_block_size(struct acpi_table_header *table,
#endif /* CONFIG_ACPI */
+#ifdef CONFIG_ACPI_APEI
+/*
+ * acpi_disable_cmcff is used in drivers/acpi/apei/hest.c for disabling
+ * IA-32 Architecture Corrected Machine Check (CMC) Firmware-First mode
+ * with a kernel command line parameter "acpi=nocmcoff". But we don't
+ * have this IA-32 specific feature on RISC-V, this definition is only
+ * for compatibility.
+ */
+#define acpi_disable_cmcff 1
+static inline pgprot_t arch_apei_get_mem_attribute(phys_addr_t addr)
+{
+ return PAGE_KERNEL_IO;
+}
+
+#else
+#define acpi_disable_cmcff 0
+#endif
+
#ifdef CONFIG_ACPI_NUMA
void acpi_map_cpus_to_nodes(void);
#else
--
2.20.1
