diff options
| author | Igor Mammedov <imammedo@redhat.com> | 2014-12-19 11:47:00 +0000 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2015-01-27 14:46:17 +0200 |
| commit | 6d848641b7a4da92840fb2f5c240d1668f5a9281 (patch) | |
| tree | ce345d393326dc06dd492704311356a7cadb490c | |
| parent | e909c16d924c0dbb852de3c0dd3d9cb5213b90c5 (diff) | |
acpi: build_append_nameseg(): add padding if necessary
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 <imammedo@redhat.com>
Reviewed-by: Claudio Fontana <claudio.fontana@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
| -rw-r--r-- | hw/i386/acpi-build.c | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c index 6a2e9c52bc..2f1daf701c 100644 --- a/hw/i386/acpi-build.c +++ b/hw/i386/acpi-build.c @@ -305,6 +305,8 @@ 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, ...) { @@ -317,8 +319,11 @@ 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 */ @@ -859,7 +864,7 @@ 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"); @@ -979,7 +984,7 @@ 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 */ @@ -1036,7 +1041,7 @@ 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"); } @@ -1106,7 +1111,7 @@ 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++) { |