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| author | Marc Zyngier <marc.zyngier@arm.com> | 2019-01-11 14:57:58 +0000 |
|---|---|---|
| committer | Marc Zyngier <marc.zyngier@arm.com> | 2019-02-19 21:05:34 +0000 |
| commit | d18232ea8a9480606c53e91d7e2d062c3c151815 (patch) | |
| tree | 4f5076fe69453e1cc96c2ab8aad6183ba8fb9e5b /arch/arm/kvm | |
| parent | 7cba8a8d0d39c8846d0095fc2d2225c7983f4009 (diff) | |
| download | lwn-d18232ea8a9480606c53e91d7e2d062c3c151815.tar.gz lwn-d18232ea8a9480606c53e91d7e2d062c3c151815.zip | |
ARM: KVM: Teach some form of type-safety to kvm_call_hyp
Just like on arm64, and for the same reasons, kvm_call_hyp removes
any form of type safety when calling into HYP. But we can still
try to tell the compiler what we're trying to achieve.
Here, we can add code that would do the function call if it wasn't
guarded by an always-false predicate. Hopefully, the compiler is
dumb enough to do the type checking and clever enough to not emit
the corresponding code...
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Acked-by: Christoffer Dall <christoffer.dall@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@arm.com>
Diffstat (limited to 'arch/arm/kvm')
| -rw-r--r-- | arch/arm/kvm/hyp/hyp-entry.S | 2 | ||||
| -rw-r--r-- | arch/arm/kvm/interrupts.S | 4 |
2 files changed, 3 insertions, 3 deletions
diff --git a/arch/arm/kvm/hyp/hyp-entry.S b/arch/arm/kvm/hyp/hyp-entry.S index aa3f9a9837ac..6ed3cf23fe89 100644 --- a/arch/arm/kvm/hyp/hyp-entry.S +++ b/arch/arm/kvm/hyp/hyp-entry.S @@ -176,7 +176,7 @@ THUMB( orr lr, lr, #PSR_T_BIT ) msr spsr_cxsf, lr ldr lr, =panic msr ELR_hyp, lr - ldr lr, =kvm_call_hyp + ldr lr, =__kvm_call_hyp clrex eret ENDPROC(__hyp_do_panic) diff --git a/arch/arm/kvm/interrupts.S b/arch/arm/kvm/interrupts.S index 80a1d6cd261c..a08e6419ebe9 100644 --- a/arch/arm/kvm/interrupts.S +++ b/arch/arm/kvm/interrupts.S @@ -42,7 +42,7 @@ * r12: caller save * rest: callee save */ -ENTRY(kvm_call_hyp) +ENTRY(__kvm_call_hyp) hvc #0 bx lr -ENDPROC(kvm_call_hyp) +ENDPROC(__kvm_call_hyp) |