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| author | Daniel Thompson <daniel.thompson@linaro.org> | 2015-07-10 14:44:50 +0100 |
|---|---|---|
| committer | Daniel Thompson <daniel.thompson@linaro.org> | 2015-07-10 14:44:50 +0100 |
| commit | e2a465c16dbdb832b3162f0163ab9e757fed05a1 (patch) | |
| tree | 756321b26490af2d6684daf7d0c40f9054736f20 /arch/arm64/kvm | |
| parent | 82b3aeec8202363ea9d55595a25110a9d4eb3215 (diff) | |
arm64: alternative: Provide if/else/endif assembler macrosdev/arm64_alternative_if_not
The existing alternative_insn macro has some limitations that make it
hard to work with. In partiuclar the fact it takes instructions from it
own macro arguments means it doesn't play very nicely with C pre-processor
macros because the macro arguments look like a string to the C
pre-processor. Workarounds are (probably) possible but things start to
look ugly.
Introduce an alternative set of macros that allows instructions to be
presented to the assembler as normal and switch everything over to the
new macros.
Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
Diffstat (limited to 'arch/arm64/kvm')
| -rw-r--r-- | arch/arm64/kvm/hyp.S | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/arch/arm64/kvm/hyp.S b/arch/arm64/kvm/hyp.S index 17a8fb14f428..10915aaf0b01 100644 --- a/arch/arm64/kvm/hyp.S +++ b/arch/arm64/kvm/hyp.S @@ -810,7 +810,11 @@ * Call into the vgic backend for state saving */ .macro save_vgic_state - alternative_insn "bl __save_vgic_v2_state", "bl __save_vgic_v3_state", ARM64_HAS_SYSREG_GIC_CPUIF +alternative_if_not ARM64_HAS_SYSREG_GIC_CPUIF + bl __save_vgic_v2_state +alternative_else + bl __save_vgic_v3_state +alternative_endif mrs x24, hcr_el2 mov x25, #HCR_INT_OVERRIDE neg x25, x25 @@ -827,7 +831,11 @@ orr x24, x24, #HCR_INT_OVERRIDE orr x24, x24, x25 msr hcr_el2, x24 - alternative_insn "bl __restore_vgic_v2_state", "bl __restore_vgic_v3_state", ARM64_HAS_SYSREG_GIC_CPUIF +alternative_if_not ARM64_HAS_SYSREG_GIC_CPUIF + bl __restore_vgic_v2_state +alternative_else + bl __restore_vgic_v3_state +alternative_endif .endm .macro save_timer_state |