According to ACPI spec NameSeg shorter than 4 characters
must be padded up to 4 characters with "_" symbol.
ACPI 5.0: 20.2.2 "Name Objects Encoding"
Do it in build_append_nameseg() so that caller shouldn't know
or care about it.
Signed-off-by: Igor Mammedov <imamm...@redhat.com>
---
v2:
* simplify padding, suggested by: "Michael S. Tsirkin" <m...@redhat.com>
---
hw/i386/acpi-build.c | 15 ++++++++++-----
1 file changed, 10 insertions(+), 5 deletions(-)
diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index f5ec66a..2bf9a09 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -292,6 +292,8 @@ static inline void build_append_array(GArray *array, GArray
*val)
g_array_append_vals(array, val->data, val->len);
}
+#define ACPI_NAMESEG_LEN 4
+
static void GCC_FMT_ATTR(2, 3)
build_append_nameseg(GArray *array, const char *format, ...)
{
@@ -304,8 +306,11 @@ build_append_nameseg(GArray *array, const char *format,
...)
len = vsnprintf(s, sizeof s, format, args);
va_end(args);
- assert(len == 4);
+ assert(len <= ACPI_NAMESEG_LEN);
+
g_array_append_vals(array, s, len);
+ /* Pad up to ACPI_NAMESEG_LEN characters if necessary. */
+ g_array_append_vals(array, "____", ACPI_NAMESEG_LEN - len);
}
/* 5.4 Definition Block Encoding */
@@ -846,7 +851,7 @@ static void build_pci_bus_end(PCIBus *bus, void *bus_state)
if (bus->parent_dev) {
op = 0x82; /* DeviceOp */
- build_append_nameseg(bus_table, "S%.02X_",
+ build_append_nameseg(bus_table, "S%.02X",
bus->parent_dev->devfn);
build_append_byte(bus_table, 0x08); /* NameOp */
build_append_nameseg(bus_table, "_SUN");
@@ -966,7 +971,7 @@ static void build_pci_bus_end(PCIBus *bus, void *bus_state)
build_append_int(notify, 0x1U << i);
build_append_byte(notify, 0x00); /* NullName */
build_append_byte(notify, 0x86); /* NotifyOp */
- build_append_nameseg(notify, "S%.02X_", PCI_DEVFN(i, 0));
+ build_append_nameseg(notify, "S%.02X", PCI_DEVFN(i, 0));
build_append_byte(notify, 0x69); /* Arg1Op */
/* Pack it up */
@@ -1023,7 +1028,7 @@ static void build_pci_bus_end(PCIBus *bus, void
*bus_state)
if (bus->parent_dev) {
build_append_byte(parent->notify_table, '^'); /* ParentPrefixChar
*/
build_append_byte(parent->notify_table, 0x2E); /* DualNamePrefix */
- build_append_nameseg(parent->notify_table, "S%.02X_",
+ build_append_nameseg(parent->notify_table, "S%.02X",
bus->parent_dev->devfn);
build_append_nameseg(parent->notify_table, "PCNT");
}
@@ -1093,7 +1098,7 @@ build_ssdt(GArray *table_data, GArray *linker,
GArray *sb_scope = build_alloc_array();
uint8_t op = 0x10; /* ScopeOp */
- build_append_nameseg(sb_scope, "_SB_");
+ build_append_nameseg(sb_scope, "_SB");
/* build Processor object for each processor */
for (i = 0; i < acpi_cpus; i++) {
--
1.8.3.1
