diff --git a/Makefile b/Makefile index c5073e016..961423826 100644 --- a/Makefile +++ b/Makefile @@ -865,6 +865,7 @@ $(eval $(call assert_booleans,\ CTX_INCLUDE_PAUTH_REGS \ CTX_INCLUDE_MTE_REGS \ CTX_INCLUDE_EL2_REGS \ + CTX_INCLUDE_NEVE_REGS \ DEBUG \ DYN_DISABLE_AUTH \ EL3_EXCEPTION_HANDLING \ @@ -953,6 +954,7 @@ $(eval $(call add_defines,\ EL3_EXCEPTION_HANDLING \ CTX_INCLUDE_MTE_REGS \ CTX_INCLUDE_EL2_REGS \ + CTX_INCLUDE_NEVE_REGS \ DECRYPTION_SUPPORT_${DECRYPTION_SUPPORT} \ ENABLE_AMU \ ENABLE_ASSERTIONS \ diff --git a/docs/getting_started/build-options.rst b/docs/getting_started/build-options.rst index 40fc5dbbc..8adf4ad8b 100644 --- a/docs/getting_started/build-options.rst +++ b/docs/getting_started/build-options.rst @@ -161,6 +161,10 @@ Common build options registers to be included when saving and restoring the CPU context. Default is 0. +- ``CTX_INCLUDE_NEVE_REGS``: Boolean option that, when set to 1, will cause the + Armv8.4-NV registers to be saved/restored when entering/exiting an EL2 + execution context. Default value is 0. + - ``CTX_INCLUDE_PAUTH_REGS``: Boolean option that, when set to 1, enables Pointer Authentication for Secure world. This will cause the ARMv8.3-PAuth registers to be included when saving and restoring the CPU context as diff --git a/lib/el3_runtime/aarch64/context.S b/lib/el3_runtime/aarch64/context.S index 785e85093..c942c10ec 100644 --- a/lib/el3_runtime/aarch64/context.S +++ b/lib/el3_runtime/aarch64/context.S @@ -200,8 +200,10 @@ func el2_sysregs_context_save mrs x12, vdisr_el2 str x12, [x0, #CTX_VDISR_EL2] +#if CTX_INCLUDE_NEVE_REGS mrs x13, vncr_el2 str x13, [x0, #CTX_VNCR_EL2] +#endif mrs x14, vsesr_el2 str x14, [x0, #CTX_VSESR_EL2] @@ -395,8 +397,10 @@ func el2_sysregs_context_restore ldr x13, [x0, #CTX_VDISR_EL2] msr vdisr_el2, x13 +#if CTX_INCLUDE_NEVE_REGS ldr x14, [x0, #CTX_VNCR_EL2] msr vncr_el2, x14 +#endif ldr x15, [x0, #CTX_VSESR_EL2] msr vsesr_el2, x15 diff --git a/make_helpers/defaults.mk b/make_helpers/defaults.mk index bc4982d64..578bd5987 100644 --- a/make_helpers/defaults.mk +++ b/make_helpers/defaults.mk @@ -62,6 +62,11 @@ CTX_INCLUDE_FPREGS := 0 # world. It is not needed to use it in the Non-secure world. CTX_INCLUDE_PAUTH_REGS := 0 +# Include Nested virtualization control (Armv8.4-NV) registers in cpu context. +# This must be set to 1 if architecture implements Nested Virtualization +# Extension and platform wants to use this feature in the Secure world +CTX_INCLUDE_NEVE_REGS := 0 + # Debug build DEBUG := 0