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| author | Frederic Barrat <fbarrat@linux.ibm.com> | 2025-03-11 11:51:21 +1000 |
|---|---|---|
| committer | Nicholas Piggin <npiggin@gmail.com> | 2025-03-11 22:43:31 +1000 |
| commit | 9d2b6058c5b0601779a65e7db4176073940a713d (patch) | |
| tree | bec0f2299dcc170ca540e87c39ee741917147fde /hw/intc/xive2.c | |
| parent | a45580ad03f034c84689c6bee5f875432dbd73ba (diff) | |
| download | focaccia-qemu-9d2b6058c5b0601779a65e7db4176073940a713d.tar.gz focaccia-qemu-9d2b6058c5b0601779a65e7db4176073940a713d.zip | |
ppc/xive2: Add grouping level to notification
The NSR has a (so far unused) grouping level field. When a interrupt is presented, that field tells the hypervisor or OS if the interrupt is for an individual VP or for a VP-group/crowd. This patch reworks the presentation API to allow to set/unset the level when raising/accepting an interrupt. It also renames xive_tctx_ipb_update() to xive_tctx_pipr_update() as the IPB is only used for VP-specific target, whereas the PIPR always needs to be updated. Signed-off-by: Frederic Barrat <fbarrat@linux.ibm.com> Signed-off-by: Michael Kowal <kowal@linux.ibm.com> Reviewed-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Diffstat (limited to 'hw/intc/xive2.c')
| -rw-r--r-- | hw/intc/xive2.c | 19 |
1 files changed, 11 insertions, 8 deletions
diff --git a/hw/intc/xive2.c b/hw/intc/xive2.c index cd075e4db9..62c3f05af9 100644 --- a/hw/intc/xive2.c +++ b/hw/intc/xive2.c @@ -563,8 +563,11 @@ static void xive2_tctx_need_resend(Xive2Router *xrtr, XiveTCTX *tctx, uint8_t nvp_blk, uint32_t nvp_idx, bool do_restore) { - Xive2Nvp nvp; uint8_t ipb; + uint8_t backlog_level; + uint8_t backlog_prio; + uint8_t *regs = &tctx->regs[TM_QW1_OS]; + Xive2Nvp nvp; /* * Grab the associated thread interrupt context registers in the @@ -593,15 +596,15 @@ static void xive2_tctx_need_resend(Xive2Router *xrtr, XiveTCTX *tctx, nvp.w2 = xive_set_field32(NVP2_W2_IPB, nvp.w2, 0); xive2_router_write_nvp(xrtr, nvp_blk, nvp_idx, &nvp, 2); } + regs[TM_IPB] |= ipb; + backlog_prio = xive_ipb_to_pipr(ipb); + backlog_level = 0; + /* - * Always call xive_tctx_ipb_update(). Even if there were no - * escalation triggered, there could be a pending interrupt which - * was saved when the context was pulled and that we need to take - * into account by recalculating the PIPR (which is not - * saved/restored). - * It will also raise the External interrupt signal if needed. + * Compute the PIPR based on the restored state. + * It will raise the External interrupt signal if needed. */ - xive_tctx_ipb_update(tctx, TM_QW1_OS, ipb); + xive_tctx_pipr_update(tctx, TM_QW1_OS, backlog_prio, backlog_level); } /* |