diff options
| author | Geoff Levand <geoff@infradead.org> | 2016-12-01 11:09:37 -0800 |
|---|---|---|
| committer | Simon Horman <horms@verge.net.au> | 2016-12-02 09:20:54 +0100 |
| commit | 0a7fba8b145306af4909950f64f2797a08db68d4 (patch) | |
| tree | b4ae3d162febf24062f51a93c39225de3c3c6336 | |
| parent | ec271d6c298839916009474a9736728c77d959f1 (diff) | |
purgatory: Change default sha256 optimization to -O2
Change the default purgatory sha256 code optimization from -O0 to -O2, and add a
new arch specific makefile variable $(ARCH)_PURGATORY_SHA256_CFLAGS which can
over ride this default. Set ia64_PURGATORY_SHA256_CFLAGS to -O0 to retain the
previous optimization level for ia64.
The purgatory sha256 code needs the be built with -O0 for the ia64
architecture. Currently this code is built with -O0 for all architectures,
which slows down the calculations for architectures which could otherwise
use -O2.
On arm64, it takes around 20 second to verify SHA in purgatory when
vmlinuz image is around 13MB and initramfs is around 30M with -O2
enabled. Otherwise, it takes more than 2 minutes.
Cc: Pratyush Anand <panand@redhat.com>
Signed-off-by: Geoff Levand <geoff@infradead.org>
Signed-off-by: Simon Horman <horms@verge.net.au>
| -rw-r--r-- | purgatory/Makefile | 4 | ||||
| -rw-r--r-- | purgatory/arch/ia64/Makefile | 4 |
2 files changed, 5 insertions, 3 deletions
diff --git a/purgatory/Makefile b/purgatory/Makefile index ca0443c..328904e 100644 --- a/purgatory/Makefile +++ b/purgatory/Makefile @@ -38,9 +38,7 @@ clean += $(PURGATORY_OBJS) $(PURGATORY_DEPS) $(PURGATORY) -include $(PURGATORY_DEPS) -# sha256.c needs to be compiled without optimization, else -# purgatory fails to execute on ia64. -purgatory/sha256.o: CFLAGS += -O0 +purgatory/sha256.o: CFLAGS += -O2 $($(ARCH)_PURGATORY_SHA256_CFLAGS) purgatory/sha256.o: $(srcdir)/util_lib/sha256.c mkdir -p $(@D) diff --git a/purgatory/arch/ia64/Makefile b/purgatory/arch/ia64/Makefile index 32c3d97..4a2564c 100644 --- a/purgatory/arch/ia64/Makefile +++ b/purgatory/arch/ia64/Makefile @@ -8,6 +8,10 @@ ia64_PURGATORY_SRCS += purgatory/arch/ia64/vga.c ia64_PURGATORY_EXTRA_CFLAGS = -ffixed-r28 +# sha256.c needs to be compiled without optimization, else +# purgatory fails to execute on ia64. +ia64_PURGATORY_SHA256_CFLAGS = -O0 + dist += purgatory/arch/ia64/Makefile $(ia64_PURGATORY_SRCS) \ purgatory/arch/ia64/io.h purgatory/arch/ia64/purgatory-ia64.h |