1 files changed, 36 insertions, 0 deletions
diff --git a/pc-bios/bios-pq/0006_acpi-packing.patch b/pc-bios/bios-pq/0006_acpi-packing.patch
new file mode 100644
index 0000000000..0037046a67
--- /dev/null
+++ b/pc-bios/bios-pq/0006_acpi-packing.patch
@@ -0,0 +1,36 @@
+Make ACPI tables byte-aligned
+
+The ACPI spec requires structures to be byte-aligned.  I'm a bit surprised we've
+gotten away with this for so long.  This patch allows Knoppix to boot.  This bug
+was reported by Paul Brook.
+
+Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
+
+diff --git a/bios/rombios32.c b/bios/rombios32.c
+index 7953485..540912a 100644
+--- a/bios/rombios32.c
++++ b/bios/rombios32.c
+@@ -1099,6 +1099,12 @@ static void mptable_init(void)
+ /* Table structure from Linux kernel (the ACPI tables are under the
+    BSD license) */
+ 
++/*
++ * All tables must be byte-packed to match the ACPI specification, since
++ * the tables are provided by the system BIOS.
++ */
++#pragma pack(1)
++
+ #define ACPI_TABLE_HEADER_DEF   /* ACPI common table header */ \
+ 	uint8_t                            signature [4];          /* ACPI signature (4 ASCII characters) */\
+ 	uint32_t                             length;                 /* Length of table, in bytes, including header */\
+@@ -1326,6 +1332,10 @@ struct madt_int_override
+ };
+ #endif
+ 
++/* Reset to default packing */
++
++#pragma pack()
++
+ #include "acpi-dsdt.hex"
+ 
+ static inline uint16_t cpu_to_le16(uint16_t x)