Hi Shaopeng,

On 09/09/2025 07:54, Shaopeng Tan (Fujitsu) wrote:

quoted

Add code to parse the arm64 specific MPAM table, looking up the cache level
from the PPTT and feeding the end result into the MPAM driver.

quoted

diff --git a/drivers/acpi/arm64/mpam.c b/drivers/acpi/arm64/mpam.c new

file mode 100644 index 000000000000..e55fc2729ac5

--- /dev/null
+++ b/drivers/acpi/arm64/mpam.c

@@ -0,0 +1,331 @@

quoted

+static int __init acpi_mpam_parse(void) {
+        struct acpi_table_header *table __free(acpi_table) =
acpi_get_table_ret(ACPI_SIG_MPAM, 0);
+	char *table_end, *table_offset = (char *)(table + 1);
+	struct property_entry props[4]; /* needs a sentinel */
+	struct acpi_mpam_msc_node *tbl_msc;
+	int next_res, next_prop, err = 0;
+	struct acpi_device *companion;
+	struct platform_device *pdev;
+	enum mpam_msc_iface iface;
+	struct resource res[3];
+	char uid[16];
+	u32 acpi_id;
+
+	if (acpi_disabled || !system_supports_mpam() || IS_ERR(table))
+		return 0;
+
+	if (IS_ERR(table))
+		return 0;

This is redundant, it's the same as the previous line.

Fixed, thanks.

James