powerpc/64s: Use the HV handler for external IRQ replay in HV mode on POWER9

POWER9 host external interrupts use the h_virt_irq_common handler, so
use that to replay them rather than using the hardware_interrupt_common
handler. Both call do_IRQ, but using the correct handler reduces
i-cache footprint.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S
index ab1dc98..7209863 100644 (file)
--- a/arch/powerpc/kernel/exceptions-64s.S
+++ b/arch/powerpc/kernel/exceptions-64s.S
@@ -1674,7 +1674,11 @@ _GLOBAL(__replay_interrupt)
        cmpwi   r3,0x900
        beq     decrementer_common
        cmpwi   r3,0x500
+BEGIN_FTR_SECTION
+       beq     h_virt_irq_common
+FTR_SECTION_ELSE
        beq     hardware_interrupt_common
+ALT_FTR_SECTION_END_IFSET(CPU_FTR_HVMODE | CPU_FTR_ARCH_300)
 BEGIN_FTR_SECTION
        cmpwi   r3,0xa00
        beq     h_doorbell_common_msgclr