diff options
| author | dp-arm <dimitris.papastamos@arm.com> | 2017-05-23 09:32:49 +0100 |
|---|---|---|
| committer | Dimitris Papastamos <dimitris.papastamos@arm.com> | 2017-06-22 10:33:19 +0100 |
| commit | d832aee900a92d14a08a6a2a552894188404b6a4 (patch) | |
| tree | f1e12914f0bc1f687509f1b7fbbaf172a335acfd /make_helpers | |
| parent | 18f2efd67d881fe0a9a535ce9e801e60d746e024 (diff) | |
aarch64: Enable Statistical Profiling Extensions for lower ELs
SPE is only supported in non-secure state. Accesses to SPE specific
registers from SEL1 will trap to EL3. During a world switch, before
`TTBR` is modified the SPE profiling buffers are drained. This is to
avoid a potential invalid memory access in SEL1.
SPE is architecturally specified only for AArch64.
Change-Id: I04a96427d9f9d586c331913d815fdc726855f6b0
Signed-off-by: dp-arm <dimitris.papastamos@arm.com>
Diffstat (limited to 'make_helpers')
| -rw-r--r-- | make_helpers/defaults.mk | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/make_helpers/defaults.mk b/make_helpers/defaults.mk index 2c8f82a4..9946fea1 100644 --- a/make_helpers/defaults.mk +++ b/make_helpers/defaults.mk @@ -136,3 +136,20 @@ V := 0 # required to enable cache coherency after warm reset (eg: single cluster # platforms). WARMBOOT_ENABLE_DCACHE_EARLY := 0 + +# By default, enable Statistical Profiling Extensions. +# The top level Makefile will disable this feature depending on +# the target architecture and version number. +ENABLE_SPE_FOR_LOWER_ELS := 1 + +# SPE is enabled by default but only supported on AArch64 8.2 onwards. +# Disable it in all other cases. +ifeq (${ARCH},aarch32) + override ENABLE_SPE_FOR_LOWER_ELS := 0 +else + ifeq (${ARM_ARCH_MAJOR},8) + ifeq ($(ARM_ARCH_MINOR),$(filter $(ARM_ARCH_MINOR),0 1)) + ENABLE_SPE_FOR_LOWER_ELS := 0 + endif + endif +endif |