[PATCH 10/13] powerpc/xive: Remove P9 DD1 flag XIVE_IRQ_FLAG_MASK_FW
Cédric Le Goater
clg at kaod.org
Wed Dec 9 02:11:21 AEDT 2020
This flag was used to support the PHB4 LSIs on P9 DD1 and we have
stopped supporting this CPU when DD2 came out. See skiboot commit:
https://github.com/open-power/skiboot/commit/0b0d15e3c170
Signed-off-by: Cédric Le Goater <clg at kaod.org>
---
arch/powerpc/include/asm/opal-api.h | 2 +-
arch/powerpc/include/asm/xive.h | 2 +-
arch/powerpc/kvm/book3s_xive.c | 54 +++++------------------------
arch/powerpc/sysdev/xive/common.c | 39 +--------------------
arch/powerpc/sysdev/xive/native.c | 2 --
5 files changed, 11 insertions(+), 88 deletions(-)
diff --git a/arch/powerpc/include/asm/opal-api.h b/arch/powerpc/include/asm/opal-api.h
index 48ee604ca39a..0455b679c050 100644
--- a/arch/powerpc/include/asm/opal-api.h
+++ b/arch/powerpc/include/asm/opal-api.h
@@ -1092,7 +1092,7 @@ enum {
OPAL_XIVE_IRQ_STORE_EOI = 0x00000002,
OPAL_XIVE_IRQ_LSI = 0x00000004,
OPAL_XIVE_IRQ_SHIFT_BUG = 0x00000008, /* P9 DD1.0 workaround */
- OPAL_XIVE_IRQ_MASK_VIA_FW = 0x00000010,
+ OPAL_XIVE_IRQ_MASK_VIA_FW = 0x00000010, /* P9 DD1.0 workaround */
OPAL_XIVE_IRQ_EOI_VIA_FW = 0x00000020,
};
diff --git a/arch/powerpc/include/asm/xive.h b/arch/powerpc/include/asm/xive.h
index ff805885a028..d62368d0ba91 100644
--- a/arch/powerpc/include/asm/xive.h
+++ b/arch/powerpc/include/asm/xive.h
@@ -61,7 +61,7 @@ struct xive_irq_data {
#define XIVE_IRQ_FLAG_STORE_EOI 0x01
#define XIVE_IRQ_FLAG_LSI 0x02
#define XIVE_IRQ_FLAG_SHIFT_BUG 0x04 /* P9 DD1.0 workaround */
-#define XIVE_IRQ_FLAG_MASK_FW 0x08
+#define XIVE_IRQ_FLAG_MASK_FW 0x08 /* P9 DD1.0 workaround */
#define XIVE_IRQ_FLAG_EOI_FW 0x10
#define XIVE_IRQ_FLAG_H_INT_ESB 0x20
diff --git a/arch/powerpc/kvm/book3s_xive.c b/arch/powerpc/kvm/book3s_xive.c
index fae1c2e8da29..59a986ae640b 100644
--- a/arch/powerpc/kvm/book3s_xive.c
+++ b/arch/powerpc/kvm/book3s_xive.c
@@ -419,37 +419,16 @@ static u8 xive_lock_and_mask(struct kvmppc_xive *xive,
/* Get the right irq */
kvmppc_xive_select_irq(state, &hw_num, &xd);
- /*
- * If the interrupt is marked as needing masking via
- * firmware, we do it here. Firmware masking however
- * is "lossy", it won't return the old p and q bits
- * and won't set the interrupt to a state where it will
- * record queued ones. If this is an issue we should do
- * lazy masking instead.
- *
- * For now, we work around this in unmask by forcing
- * an interrupt whenever we unmask a non-LSI via FW
- * (if ever).
- */
- if (xd->flags & OPAL_XIVE_IRQ_MASK_VIA_FW) {
- xive_native_configure_irq(hw_num,
- kvmppc_xive_vp(xive, state->act_server),
- MASKED, state->number);
- /* set old_p so we can track if an H_EOI was done */
- state->old_p = true;
- state->old_q = false;
- } else {
- /* Set PQ to 10, return old P and old Q and remember them */
- val = xive_vm_esb_load(xd, XIVE_ESB_SET_PQ_10);
- state->old_p = !!(val & 2);
- state->old_q = !!(val & 1);
+ /* Set PQ to 10, return old P and old Q and remember them */
+ val = xive_vm_esb_load(xd, XIVE_ESB_SET_PQ_10);
+ state->old_p = !!(val & 2);
+ state->old_q = !!(val & 1);
- /*
- * Synchronize hardware to sensure the queues are updated
- * when masking
+ /*
+ * Synchronize hardware to sensure the queues are updated
+ * when masking
*/
- xive_native_sync_source(hw_num);
- }
+ xive_native_sync_source(hw_num);
return old_prio;
}
@@ -483,23 +462,6 @@ static void xive_finish_unmask(struct kvmppc_xive *xive,
/* Get the right irq */
kvmppc_xive_select_irq(state, &hw_num, &xd);
- /*
- * See comment in xive_lock_and_mask() concerning masking
- * via firmware.
- */
- if (xd->flags & OPAL_XIVE_IRQ_MASK_VIA_FW) {
- xive_native_configure_irq(hw_num,
- kvmppc_xive_vp(xive, state->act_server),
- state->act_priority, state->number);
- /* If an EOI is needed, do it here */
- if (!state->old_p)
- xive_vm_source_eoi(hw_num, xd);
- /* If this is not an LSI, force a trigger */
- if (!(xd->flags & OPAL_XIVE_IRQ_LSI))
- xive_irq_trigger(xd);
- goto bail;
- }
-
/* Old Q set, set PQ to 11 */
if (state->old_q)
xive_vm_esb_load(xd, XIVE_ESB_SET_PQ_11);
diff --git a/arch/powerpc/sysdev/xive/common.c b/arch/powerpc/sysdev/xive/common.c
index a9259470bf9f..a71412fefb65 100644
--- a/arch/powerpc/sysdev/xive/common.c
+++ b/arch/powerpc/sysdev/xive/common.c
@@ -424,9 +424,7 @@ static void xive_irq_eoi(struct irq_data *d)
}
/*
- * Helper used to mask and unmask an interrupt source. This
- * is only called for normal interrupts that do not require
- * masking/unmasking via firmware.
+ * Helper used to mask and unmask an interrupt source.
*/
static void xive_do_source_set_mask(struct xive_irq_data *xd,
bool mask)
@@ -673,20 +671,6 @@ static void xive_irq_unmask(struct irq_data *d)
pr_devel("xive_irq_unmask: irq %d data @%p\n", d->irq, xd);
- /*
- * This is a workaround for PCI LSI problems on P9, for
- * these, we call FW to set the mask. The problems might
- * be fixed by P9 DD2.0, if that is the case, firmware
- * will no longer set that flag.
- */
- if (xd->flags & XIVE_IRQ_FLAG_MASK_FW) {
- unsigned int hw_irq = (unsigned int)irqd_to_hwirq(d);
- xive_ops->configure_irq(hw_irq,
- get_hard_smp_processor_id(xd->target),
- xive_irq_priority, d->irq);
- return;
- }
-
xive_do_source_set_mask(xd, false);
}
@@ -696,20 +680,6 @@ static void xive_irq_mask(struct irq_data *d)
pr_devel("xive_irq_mask: irq %d data @%p\n", d->irq, xd);
- /*
- * This is a workaround for PCI LSI problems on P9, for
- * these, we call OPAL to set the mask. The problems might
- * be fixed by P9 DD2.0, if that is the case, firmware
- * will no longer set that flag.
- */
- if (xd->flags & XIVE_IRQ_FLAG_MASK_FW) {
- unsigned int hw_irq = (unsigned int)irqd_to_hwirq(d);
- xive_ops->configure_irq(hw_irq,
- get_hard_smp_processor_id(xd->target),
- 0xff, d->irq);
- return;
- }
-
xive_do_source_set_mask(xd, true);
}
@@ -852,13 +822,6 @@ static int xive_irq_set_vcpu_affinity(struct irq_data *d, void *state)
int rc;
u8 pq;
- /*
- * We only support this on interrupts that do not require
- * firmware calls for masking and unmasking
- */
- if (xd->flags & XIVE_IRQ_FLAG_MASK_FW)
- return -EIO;
-
/*
* This is called by KVM with state non-NULL for enabling
* pass-through or NULL for disabling it
diff --git a/arch/powerpc/sysdev/xive/native.c b/arch/powerpc/sysdev/xive/native.c
index 0310783241b5..deb97ad25d62 100644
--- a/arch/powerpc/sysdev/xive/native.c
+++ b/arch/powerpc/sysdev/xive/native.c
@@ -64,8 +64,6 @@ int xive_native_populate_irq_data(u32 hw_irq, struct xive_irq_data *data)
data->flags |= XIVE_IRQ_FLAG_STORE_EOI;
if (opal_flags & OPAL_XIVE_IRQ_LSI)
data->flags |= XIVE_IRQ_FLAG_LSI;
- if (opal_flags & OPAL_XIVE_IRQ_MASK_VIA_FW)
- data->flags |= XIVE_IRQ_FLAG_MASK_FW;
if (opal_flags & OPAL_XIVE_IRQ_EOI_VIA_FW)
data->flags |= XIVE_IRQ_FLAG_EOI_FW;
data->eoi_page = be64_to_cpu(eoi_page);
--
2.26.2
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