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[PATCH 3/9] ppc/xive: Record the IPB in the associated NVT
From: |
Cédric Le Goater |
Subject: |
[PATCH 3/9] ppc/xive: Record the IPB in the associated NVT |
Date: |
Mon, 7 Oct 2019 10:40:56 +0200 |
When an interrupt can not be presented to a vCPU, the XIVE presenter
updates the Interrupt Pending Buffer of the XIVE NVT if backlog is
activated in the END.
Signed-off-by: Cédric Le Goater <address@hidden>
---
include/hw/ppc/xive_regs.h | 1 +
hw/intc/xive.c | 11 +++++++++--
2 files changed, 10 insertions(+), 2 deletions(-)
diff --git a/include/hw/ppc/xive_regs.h b/include/hw/ppc/xive_regs.h
index 55307cd1533c..530f232b04f8 100644
--- a/include/hw/ppc/xive_regs.h
+++ b/include/hw/ppc/xive_regs.h
@@ -255,6 +255,7 @@ typedef struct XiveNVT {
uint32_t w2;
uint32_t w3;
uint32_t w4;
+#define NVT_W4_IPB PPC_BITMASK32(16, 23)
uint32_t w5;
uint32_t w6;
uint32_t w7;
diff --git a/hw/intc/xive.c b/hw/intc/xive.c
index cbe4ae6c294d..2bf7b4ad7006 100644
--- a/hw/intc/xive.c
+++ b/hw/intc/xive.c
@@ -1600,14 +1600,21 @@ static void xive_router_end_notify(XiveRouter *xrtr,
uint8_t end_blk,
* - logical server : forward request to IVPE (not supported)
*/
if (xive_end_is_backlog(&end)) {
+ uint8_t ipb;
+
if (format == 1) {
qemu_log_mask(LOG_GUEST_ERROR,
"XIVE: END %x/%x invalid config: F1 & backlog\n",
end_blk, end_idx);
return;
}
- /* Record the IPB in the associated NVT structure */
- ipb_update((uint8_t *) &nvt.w4, priority);
+ /*
+ * Record the IPB in the associated NVT structure for later
+ * use. The presenter will resend the interrupt when the vCPU
+ * is dispatched again on a HW thread.
+ */
+ ipb = xive_get_field32(NVT_W4_IPB, nvt.w4) | priority_to_ipb(priority);
+ nvt.w4 = xive_set_field32(NVT_W4_IPB, nvt.w4, ipb);
xive_router_write_nvt(xrtr, nvt_blk, nvt_idx, &nvt, 4);
/*
--
2.21.0
- [PATCH 0/9] ppc/pnv: XIVE cleanup and fixes, Cédric Le Goater, 2019/10/07
- [PATCH 4/9] ppc/xive: Introduce helpers for the NVT id, Cédric Le Goater, 2019/10/07
- [PATCH 3/9] ppc/xive: Record the IPB in the associated NVT,
Cédric Le Goater <=
- [PATCH 2/9] ppc/pnv: Use address_space_stq_be() when triggering an interrupt from PSI, Cédric Le Goater, 2019/10/07
- [PATCH 8/9] ppc/xive: Introduce OS CAM line helpers, Cédric Le Goater, 2019/10/07
- [PATCH 6/9] ppc/pnv: Dump the XIVE NVT table, Cédric Le Goater, 2019/10/07
- [PATCH 7/9] ppc/pnv: Quiesce some XIVE errors, Cédric Le Goater, 2019/10/07
- [PATCH 1/9] ppc/pnv: Improve trigger data definition, Cédric Le Goater, 2019/10/07
- [PATCH 9/9] ppc/xive: Check V bit in TM_PULL_POOL_CTX, Cédric Le Goater, 2019/10/07