If the field is two bits, I think the ACPI_DMT_* symbol should be ACPI_DMT_FLAGS2, not ACPI_DMT_FLAGS1 -----Original Message----- From: Zenghui Yu <yuzenghui(a)huawei.com&gt; Sent: Thursday, February 25, 2021 3:26 AM To: devel(a)acpica.org; linux-acpi(a)vger.kernel.org Cc: Moore, Robert <robert.moore(a)intel.com&gt;; Kaneda, Erik <erik.kaneda(a)intel.com&gt;; robin.murphy(a)arm.com; Wysocki, Rafael J <rafael.j.wysocki(a)intel.com&gt;; guohanjun(a)huawei.com; wanghaibin.wang(a)huawei.com; Zenghui Yu <yuzenghui(a)huawei.com&gt;; Kunkun Jiang <jiangkunkun(a)huawei.com&gt; Subject: [PATCH] [ACPICA] IORT: Fix HTTU Override mask for the SMMUv3 subtable As per the IORT spec, this field overrides the value in SMMU_IRD0.HTTU which should always have been 2 bits. Fixes: 9f7c3e148f44 ("IORT: Add in support for the SMMUv3 subtable") Reported-by: Kunkun Jiang <jiangkunkun(a)huawei.com&gt; Signed-off-by: Zenghui Yu <yuzenghui(a)huawei.com&gt; --- source/common/dmtbinfo2.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/source/common/dmtbinfo2.c b/source/common/dmtbinfo2.c index 17a80ba21..321f106fa 100644 --- a/source/common/dmtbinfo2.c +++ b/source/common/dmtbinfo2.c @@ -343,7 +343,7 @@ ACPI_DMTABLE_INFO AcpiDmTableInfoIort4[] = {ACPI_DMT_UINT64, ACPI_IORT4_OFFSET (BaseAddress), "Base Address", 0}, {ACPI_DMT_UINT32, ACPI_IORT4_OFFSET (Flags), "Flags (decoded below)", 0}, {ACPI_DMT_FLAG0, ACPI_IORT4_FLAG_OFFSET (Flags, 0), "COHACC Override", 0}, - {ACPI_DMT_FLAG1, ACPI_IORT4_FLAG_OFFSET (Flags, 0), "HTTU Override", 0}, + {ACPI_DMT_FLAGS1, ACPI_IORT4_FLAG_OFFSET (Flags, 0), "HTTU Override", 0}, {ACPI_DMT_FLAG3, ACPI_IORT4_FLAG_OFFSET (Flags, 0), "Proximity Domain Valid", 0}, {ACPI_DMT_UINT32, ACPI_IORT4_OFFSET (Reserved), "Reserved", 0}, {ACPI_DMT_UINT64, ACPI_IORT4_OFFSET (VatosAddress), "VATOS Address", 0}, -- 2.19.1