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| /optee_os/core/include/drivers/ |
| H A D | gic.h | 846034561d2fb13e177396e9cd199ffb90c4ad9c Mon Oct 23 14:28:27 UTC 2023 Jens Wiklander <jens.wiklander@linaro.org> core: gic: add gic_init_donate_sgi_to_ns()
Adds gic_init_donate_sgi_to_ns() which changes a secure SGI to become
non-secure.
Secure world currently has a few SGIs to spare while normal world
typically have reserved each of the non-secure SGIs for different
purposes.
In case another non-secure SGI is needed secure world can donate one of
its unused SGIs. This configuration will then deviate from the standard
GIC configuration where SGI ID0-ID7 are non-secure and ID8-ID15 are
secure.
Platforms using gic_init_donate_sgi_to_ns() should also use
gic_init_per_cpu() instead of the deprecated gic_cpu_init().
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Reviewed-by: Etienne Carriere <etienne.carriere@foss.st.com>
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| /optee_os/core/drivers/ |
| H A D | gic.c | 846034561d2fb13e177396e9cd199ffb90c4ad9c Mon Oct 23 14:28:27 UTC 2023 Jens Wiklander <jens.wiklander@linaro.org> core: gic: add gic_init_donate_sgi_to_ns()
Adds gic_init_donate_sgi_to_ns() which changes a secure SGI to become
non-secure.
Secure world currently has a few SGIs to spare while normal world
typically have reserved each of the non-secure SGIs for different
purposes.
In case another non-secure SGI is needed secure world can donate one of
its unused SGIs. This configuration will then deviate from the standard
GIC configuration where SGI ID0-ID7 are non-secure and ID8-ID15 are
secure.
Platforms using gic_init_donate_sgi_to_ns() should also use
gic_init_per_cpu() instead of the deprecated gic_cpu_init().
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Reviewed-by: Etienne Carriere <etienne.carriere@foss.st.com>
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