powerpc/64e: remove PACA_IRQ_EE_EDGE

This is not used anywhere.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200915114650.3980244-3-npiggin@gmail.com

arch/powerpc/include/asm/hw_irq.h

@@ -25,9 +25,8 @@
 #define PACA_IRQ_DBELL		0x02
 #define PACA_IRQ_EE		0x04
 #define PACA_IRQ_DEC		0x08 /* Or FIT */
-#define PACA_IRQ_EE_EDGE	0x10 /* BookE only */
-#define PACA_IRQ_HMI		0x20
-#define PACA_IRQ_PMI		0x40
+#define PACA_IRQ_HMI		0x10
+#define PACA_IRQ_PMI		0x20
 
 /*
  * Some soft-masked interrupts must be hard masked until they are replayed

arch/powerpc/kernel/exceptions-64e.S

@@ -988,7 +988,6 @@ kernel_dbg_exc:
 .endm
 
 masked_interrupt_book3e_0x500:
-	// XXX When adding support for EPR, use PACA_IRQ_EE_EDGE
 	masked_interrupt_book3e PACA_IRQ_EE 1
 
 masked_interrupt_book3e_0x900:

arch/powerpc/kernel/irq.c

@@ -181,16 +181,6 @@ notrace unsigned int __check_irq_replay(void)
 		return 0x500;
 	}
 
-	/*
-	 * Check if an EPR external interrupt happened this bit is typically
-	 * set if we need to handle another "edge" interrupt from within the
-	 * MPIC "EPR" handler.
-	 */
-	if (happened & PACA_IRQ_EE_EDGE) {
-		local_paca->irq_happened &= ~PACA_IRQ_EE_EDGE;
-		return 0x500;
-	}
-
 	if (happened & PACA_IRQ_DBELL) {
 		local_paca->irq_happened &= ~PACA_IRQ_DBELL;
 		return 0x280;
@@ -270,19 +260,6 @@ void replay_soft_interrupts(void)
 			hard_irq_disable();
 	}
 
-	/*
-	 * Check if an EPR external interrupt happened this bit is typically
-	 * set if we need to handle another "edge" interrupt from within the
-	 * MPIC "EPR" handler.
-	 */
-	if (IS_ENABLED(CONFIG_PPC_BOOK3E) && (happened & PACA_IRQ_EE_EDGE)) {
-		local_paca->irq_happened &= ~PACA_IRQ_EE_EDGE;
-		regs.trap = 0x500;
-		do_IRQ(&regs);
-		if (!(local_paca->irq_happened & PACA_IRQ_HARD_DIS))
-			hard_irq_disable();
-	}
-
 	if (IS_ENABLED(CONFIG_PPC_DOORBELL) && (happened & PACA_IRQ_DBELL)) {
 		local_paca->irq_happened &= ~PACA_IRQ_DBELL;
 		if (IS_ENABLED(CONFIG_PPC_BOOK3E))