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Diffstat (limited to 'arch/powerpc/platforms/pseries/xics.c')
-rw-r--r--arch/powerpc/platforms/pseries/xics.c53
1 files changed, 41 insertions, 12 deletions
diff --git a/arch/powerpc/platforms/pseries/xics.c b/arch/powerpc/platforms/pseries/xics.c
index 6b1a005cc0c..1bccd4a56b5 100644
--- a/arch/powerpc/platforms/pseries/xics.c
+++ b/arch/powerpc/platforms/pseries/xics.c
@@ -332,32 +332,61 @@ static void xics_eoi_lpar(unsigned int virq)
lpar_xirr_info_set((0xff << 24) | irq);
}
-static inline unsigned int xics_remap_irq(unsigned int vec)
+static inline unsigned int xics_xirr_vector(unsigned int xirr)
{
- unsigned int irq;
+ /*
+ * The top byte is the old cppr, to be restored on EOI.
+ * The remaining 24 bits are the vector.
+ */
+ return xirr & 0x00ffffff;
+}
- vec &= 0x00ffffff;
+static void xics_mask_unknown_vec(unsigned int vec)
+{
+ printk(KERN_ERR "Interrupt %u (real) is invalid, disabling it.\n", vec);
+ xics_mask_real_irq(vec);
+}
+
+static unsigned int xics_get_irq_direct(void)
+{
+ unsigned int xirr = direct_xirr_info_get();
+ unsigned int vec = xics_xirr_vector(xirr);
+ unsigned int irq;
if (vec == XICS_IRQ_SPURIOUS)
return NO_IRQ;
+
irq = irq_radix_revmap_lookup(xics_host, vec);
if (likely(irq != NO_IRQ))
return irq;
- printk(KERN_ERR "Interrupt %u (real) is invalid,"
- " disabling it.\n", vec);
- xics_mask_real_irq(vec);
- return NO_IRQ;
-}
+ /* We don't have a linux mapping, so have rtas mask it. */
+ xics_mask_unknown_vec(vec);
-static unsigned int xics_get_irq_direct(void)
-{
- return xics_remap_irq(direct_xirr_info_get());
+ /* We might learn about it later, so EOI it */
+ direct_xirr_info_set(xirr);
+ return NO_IRQ;
}
static unsigned int xics_get_irq_lpar(void)
{
- return xics_remap_irq(lpar_xirr_info_get());
+ unsigned int xirr = lpar_xirr_info_get();
+ unsigned int vec = xics_xirr_vector(xirr);
+ unsigned int irq;
+
+ if (vec == XICS_IRQ_SPURIOUS)
+ return NO_IRQ;
+
+ irq = irq_radix_revmap_lookup(xics_host, vec);
+ if (likely(irq != NO_IRQ))
+ return irq;
+
+ /* We don't have a linux mapping, so have RTAS mask it. */
+ xics_mask_unknown_vec(vec);
+
+ /* We might learn about it later, so EOI it */
+ lpar_xirr_info_set(xirr);
+ return NO_IRQ;
}
#ifdef CONFIG_SMP