[PATCH v12 04/17] arm64: kernel: add helper for booted at EL2 and not VHE

[Pavel Tatashin]

Replace places that contain logic like this:
        is_hyp_mode_available() && !is_kernel_in_hyp_mode()

With a dedicated boolean function  is_hyp_callable(). This will be needed
later in kexec in order to sooner switch back to EL2.

Suggested-by: James Morse <james.mo...@arm.com>
Signed-off-by: Pavel Tatashin <pasha.tatas...@soleen.com>
---
 arch/arm64/include/asm/virt.h | 5 +++++
 arch/arm64/kernel/cpu-reset.h | 3 +--
 arch/arm64/kernel/hibernate.c | 9 +++------
 arch/arm64/kernel/sdei.c      | 2 +-
 4 files changed, 10 insertions(+), 9 deletions(-)

diff --git a/arch/arm64/include/asm/virt.h b/arch/arm64/include/asm/virt.h
index 7379f35ae2c6..4216c8623538 100644
--- a/arch/arm64/include/asm/virt.h
+++ b/arch/arm64/include/asm/virt.h
@@ -128,6 +128,11 @@ static __always_inline bool is_protected_kvm_enabled(void)
                return cpus_have_final_cap(ARM64_KVM_PROTECTED_MODE);
 }
 
+static inline bool is_hyp_callable(void)
+{
+       return is_hyp_mode_available() && !is_kernel_in_hyp_mode();
+}
+
 #endif /* __ASSEMBLY__ */
 
 #endif /* ! __ASM__VIRT_H */
diff --git a/arch/arm64/kernel/cpu-reset.h b/arch/arm64/kernel/cpu-reset.h
index ed50e9587ad8..1922e7a690f8 100644
--- a/arch/arm64/kernel/cpu-reset.h
+++ b/arch/arm64/kernel/cpu-reset.h
@@ -20,8 +20,7 @@ static inline void __noreturn cpu_soft_restart(unsigned long 
entry,
 {
        typeof(__cpu_soft_restart) *restart;
 
-       unsigned long el2_switch = !is_kernel_in_hyp_mode() &&
-               is_hyp_mode_available();
+       unsigned long el2_switch = is_hyp_callable();
        restart = (void *)__pa_symbol(__cpu_soft_restart);
 
        cpu_install_idmap();
diff --git a/arch/arm64/kernel/hibernate.c b/arch/arm64/kernel/hibernate.c
index b1cef371df2b..c764574a1acb 100644
--- a/arch/arm64/kernel/hibernate.c
+++ b/arch/arm64/kernel/hibernate.c
@@ -48,9 +48,6 @@
  */
 extern int in_suspend;
 
-/* Do we need to reset el2? */
-#define el2_reset_needed() (is_hyp_mode_available() && 
!is_kernel_in_hyp_mode())
-
 /* temporary el2 vectors in the __hibernate_exit_text section. */
 extern char hibernate_el2_vectors[];
 
@@ -125,7 +122,7 @@ int arch_hibernation_header_save(void *addr, unsigned int 
max_size)
        hdr->reenter_kernel     = _cpu_resume;
 
        /* We can't use __hyp_get_vectors() because kvm may still be loaded */
-       if (el2_reset_needed())
+       if (is_hyp_callable())
                hdr->__hyp_stub_vectors = __pa_symbol(__hyp_stub_vectors);
        else
                hdr->__hyp_stub_vectors = 0;
@@ -387,7 +384,7 @@ int swsusp_arch_suspend(void)
                dcache_clean_range(__idmap_text_start, __idmap_text_end);
 
                /* Clean kvm setup code to PoC? */
-               if (el2_reset_needed()) {
+               if (is_hyp_callable()) {
                        dcache_clean_range(__hyp_idmap_text_start, 
__hyp_idmap_text_end);
                        dcache_clean_range(__hyp_text_start, __hyp_text_end);
                }
@@ -482,7 +479,7 @@ int swsusp_arch_resume(void)
         *
         * We can skip this step if we booted at EL1, or are running with VHE.
         */
-       if (el2_reset_needed()) {
+       if (is_hyp_callable()) {
                phys_addr_t el2_vectors = (phys_addr_t)hibernate_exit;
                el2_vectors += hibernate_el2_vectors -
                               __hibernate_exit_text_start;     /* offset */
diff --git a/arch/arm64/kernel/sdei.c b/arch/arm64/kernel/sdei.c
index 2c7ca449dd51..af0ac2f920cf 100644
--- a/arch/arm64/kernel/sdei.c
+++ b/arch/arm64/kernel/sdei.c
@@ -200,7 +200,7 @@ unsigned long sdei_arch_get_entry_point(int conduit)
         * dropped to EL1 because we don't support VHE, then we can't support
         * SDEI.
         */
-       if (is_hyp_mode_available() && !is_kernel_in_hyp_mode()) {
+       if (is_hyp_callable()) {
                pr_err("Not supported on this hardware/boot configuration\n");
                goto out_err;
        }
-- 
2.25.1