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[Qemu-devel] [PATCH v2 06/17] ppc/xive: Provide unconditional escalation
From: |
Cédric Le Goater |
Subject: |
[Qemu-devel] [PATCH v2 06/17] ppc/xive: Provide unconditional escalation support |
Date: |
Thu, 18 Jul 2019 13:54:09 +0200 |
When the 'u' bit is set the escalation is said to be 'unconditional'
which means that the ESe PQ bits are not used. Introduce a
xive_router_end_es_notify() routine to share code with the ESn
notification.
Signed-off-by: Cédric Le Goater <address@hidden>
---
include/hw/ppc/xive_regs.h | 2 ++
hw/intc/xive.c | 44 ++++++++++++++++++++++++++++++--------
2 files changed, 37 insertions(+), 9 deletions(-)
diff --git a/include/hw/ppc/xive_regs.h b/include/hw/ppc/xive_regs.h
index 1a8c5b5e64f0..5d02ccfeff16 100644
--- a/include/hw/ppc/xive_regs.h
+++ b/include/hw/ppc/xive_regs.h
@@ -207,6 +207,8 @@ typedef struct XiveEND {
#define xive_end_is_notify(end) (be32_to_cpu((end)->w0) &
END_W0_UCOND_NOTIFY)
#define xive_end_is_backlog(end) (be32_to_cpu((end)->w0) & END_W0_BACKLOG)
#define xive_end_is_escalate(end) (be32_to_cpu((end)->w0) &
END_W0_ESCALATE_CTL)
+#define xive_end_is_uncond_escalation(end) \
+ (be32_to_cpu((end)->w0) & END_W0_UNCOND_ESCALATE)
static inline uint64_t xive_end_qaddr(XiveEND *end)
{
diff --git a/hw/intc/xive.c b/hw/intc/xive.c
index 89a09dde060b..c2e7e2d4c9a9 100644
--- a/hw/intc/xive.c
+++ b/hw/intc/xive.c
@@ -1407,6 +1407,27 @@ static bool xive_presenter_notify(XiveRouter *xrtr,
uint8_t format,
return found;
}
+/*
+ * Notification using the END ESe/ESn bit (Event State Buffer for
+ * escalation and notification). Profide futher coalescing in the
+ * Router.
+ */
+static bool xive_router_end_es_notify(XiveRouter *xrtr, uint8_t end_blk,
+ uint32_t end_idx, XiveEND *end,
+ uint32_t end_esmask)
+{
+ uint8_t pq = xive_get_field32(end_esmask, end->w1);
+ bool notify = xive_esb_trigger(&pq);
+
+ if (pq != xive_get_field32(end_esmask, end->w1)) {
+ end->w1 = xive_set_field32(end_esmask, end->w1, pq);
+ xive_router_write_end(xrtr, end_blk, end_idx, end, 1);
+ }
+
+ /* ESe/n[Q]=1 : end of notification */
+ return notify;
+}
+
/*
* An END trigger can come from an event trigger (IPI or HW) or from
* another chip. We don't model the PowerBus but the END trigger
@@ -1463,16 +1484,9 @@ static void xive_router_end_notify(XiveRouter *xrtr,
uint8_t end_blk,
* even futher coalescing in the Router
*/
if (!xive_end_is_notify(&end)) {
- uint8_t pq = xive_get_field32(END_W1_ESn, end.w1);
- bool notify = xive_esb_trigger(&pq);
-
- if (pq != xive_get_field32(END_W1_ESn, end.w1)) {
- end.w1 = xive_set_field32(END_W1_ESn, end.w1, pq);
- xive_router_write_end(xrtr, end_blk, end_idx, &end, 1);
- }
-
/* ESn[Q]=1 : end of notification */
- if (!notify) {
+ if (!xive_router_end_es_notify(xrtr, end_blk, end_idx,
+ &end, END_W1_ESn)) {
return;
}
}
@@ -1536,6 +1550,18 @@ static void xive_router_end_notify(XiveRouter *xrtr,
uint8_t end_blk,
return;
}
+ /*
+ * Check the END ESe (Event State Buffer for escalation) for even
+ * futher coalescing in the Router
+ */
+ if (!xive_end_is_uncond_escalation(&end)) {
+ /* ESe[Q]=1 : end of notification */
+ if (!xive_router_end_es_notify(xrtr, end_blk, end_idx,
+ &end, END_W1_ESe)) {
+ return;
+ }
+ }
+
/*
* The END trigger becomes an Escalation trigger
*/
--
2.21.0
- [Qemu-devel] [PATCH v2 00/17] ppc/pnv: add XIVE support for KVM guests, Cédric Le Goater, 2019/07/18
- [Qemu-devel] [PATCH v2 02/17] ppc/pnv: add more dummy XSCOM addresses for the P9 CAPP, Cédric Le Goater, 2019/07/18
- [Qemu-devel] [PATCH v2 01/17] ppc/xive: use an abstract type for XiveNotifier, Cédric Le Goater, 2019/07/18
- [Qemu-devel] [PATCH v2 03/17] ppc/xive: Implement TM_PULL_OS_CTX special command, Cédric Le Goater, 2019/07/18
- [Qemu-devel] [PATCH v2 04/17] ppc/xive: Provide backlog support, Cédric Le Goater, 2019/07/18
- [Qemu-devel] [PATCH v2 05/17] ppc/xive: Provide escalation support, Cédric Le Goater, 2019/07/18
- [Qemu-devel] [PATCH v2 06/17] ppc/xive: Provide unconditional escalation support,
Cédric Le Goater <=
- [Qemu-devel] [PATCH v2 07/17] ppc/xive: Provide silent escalation support, Cédric Le Goater, 2019/07/18
- [Qemu-devel] [PATCH v2 08/17] ppc/xive: Improve 'info pic' support, Cédric Le Goater, 2019/07/18
- [Qemu-devel] [PATCH v2 09/17] ppc/xive: Extend XiveTCTX with a XiveRouter pointer, Cédric Le Goater, 2019/07/18
[Qemu-devel] [PATCH v2 10/17] ppc/xive: Introduce xive_tctx_ipb_update(), Cédric Le Goater, 2019/07/18
[Qemu-devel] [PATCH v2 11/17] ppc/xive: Synthesize interrupt from the saved IPB in the NVT, Cédric Le Goater, 2019/07/18