services/spm_deprecated: permit timer sysreg access at S-EL0
Expose the timer registers that are accessible at EL0 per the
architecture to the SPM payload running in secure EL0. Note
that this requires NS_TIMER_SWITCH to be enable for all users
of this code.
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
diff --git a/services/std_svc/spm_deprecated/spm_setup.c b/services/std_svc/spm_deprecated/spm_setup.c
index e78a42c..beaff94 100644
--- a/services/std_svc/spm_deprecated/spm_setup.c
+++ b/services/std_svc/spm_deprecated/spm_setup.c
@@ -168,6 +168,9 @@
write_ctx_reg(get_sysregs_ctx(ctx), CTX_VBAR_EL1,
SPM_SHIM_EXCEPTIONS_PTR);
+ write_ctx_reg(get_sysregs_ctx(ctx), CTX_CNTKCTL_EL1,
+ EL0PTEN_BIT | EL0VTEN_BIT | EL0PCTEN_BIT | EL0VCTEN_BIT);
+
/*
* FPEN: Allow the Secure Partition to access FP/SIMD registers.
* Note that SPM will not do any saving/restoring of these registers on