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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)
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