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| author | Nicholas Piggin <npiggin@gmail.com> | 2019-05-10 14:46:27 +1000 |
|---|---|---|
| committer | Stewart Smith <stewart@linux.ibm.com> | 2019-05-20 14:20:29 +1000 |
| commit | df6b7a2dadd72a519c6bdae95a89ead48b3e095b (patch) | |
| tree | c70fe71c04fd2c1eb39a81c05f2c8efef11e358c /core | |
| parent | bc0a30f0bc58ef1406e595d101b70c067b80ea53 (diff) | |
| download | skiboot-df6b7a2dadd72a519c6bdae95a89ead48b3e095b.zip skiboot-df6b7a2dadd72a519c6bdae95a89ead48b3e095b.tar.gz skiboot-df6b7a2dadd72a519c6bdae95a89ead48b3e095b.tar.bz2 | |
device-tree: speed up fdt building on slow simulators
Trade size for speed and avoid de-duplicating strings in the fdt.
This costs about 2kB in fdt size, and saves about 8 million instructions
(almost half of all instructions) booting skiboot in mambo.
This was tracked down by Michael Neuling <mikey@neuling.org>.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Stewart Smith <stewart@linux.ibm.com>
Diffstat (limited to 'core')
| -rw-r--r-- | core/fdt.c | 6 | ||||
| -rw-r--r-- | core/test/stubs.c | 2 |
2 files changed, 6 insertions, 2 deletions
@@ -18,6 +18,7 @@ #include <stdarg.h> #include <libfdt.h> #include <device.h> +#include <chip.h> #include <cpu.h> #include <opal.h> #include <interrupts.h> @@ -167,7 +168,10 @@ static int __create_dtb(void *fdt, size_t len, const struct dt_node *root, bool exclusive) { - save_err(fdt_create(fdt, len)); + if (chip_quirk(QUIRK_SLOW_SIM)) + save_err(fdt_create_with_flags(fdt, len, FDT_CREATE_FLAG_NO_NAME_DEDUP)); + else + save_err(fdt_create_with_flags(fdt, len, 0)); if (fdt_error) goto err; diff --git a/core/test/stubs.c b/core/test/stubs.c index e0f9829..0a8d852 100644 --- a/core/test/stubs.c +++ b/core/test/stubs.c @@ -94,7 +94,7 @@ void __attrconst cpu_process_local_jobs(void) STUB(fdt_begin_node); STUB(fdt_property); STUB(fdt_end_node); -STUB(fdt_create); +STUB(fdt_create_with_flags); STUB(fdt_add_reservemap_entry); STUB(fdt_finish_reservemap); STUB(fdt_strerror); |