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Re: [PATCH for-5.0 v5 15/23] ppc/xive: Use the XiveFabric and XivePresen
From: |
Greg Kurz |
Subject: |
Re: [PATCH for-5.0 v5 15/23] ppc/xive: Use the XiveFabric and XivePresenter interfaces |
Date: |
Thu, 21 Nov 2019 08:30:42 +0100 |
On Thu, 21 Nov 2019 08:01:44 +0100
Cédric Le Goater <address@hidden> wrote:
> On 20/11/2019 19:30, Greg Kurz wrote:
> > On Fri, 15 Nov 2019 17:24:28 +0100
> > Cédric Le Goater <address@hidden> wrote:
> >
> >> Now that the machines have handlers implementing the XiveFabric and
> >> XivePresenter interfaces, remove xive_presenter_match() and make use
> >> of the 'match_nvt' handler of the machine.
> >>
> >> Signed-off-by: Cédric Le Goater <address@hidden>
> >> ---
> >> hw/intc/xive.c | 48 +++++++++++++++++-------------------------------
> >> 1 file changed, 17 insertions(+), 31 deletions(-)
> >>
> >
> > Nice diffstat :)
> >
> >> diff --git a/hw/intc/xive.c b/hw/intc/xive.c
> >> index 1c9e58f8deac..ab62bda85788 100644
> >> --- a/hw/intc/xive.c
> >> +++ b/hw/intc/xive.c
> >> @@ -1423,30 +1423,6 @@ int xive_presenter_tctx_match(XivePresenter *xptr,
> >> XiveTCTX *tctx,
> >> return -1;
> >> }
> >>
> >> -static bool xive_presenter_match(XiveRouter *xrtr, uint8_t format,
> >> - uint8_t nvt_blk, uint32_t nvt_idx,
> >> - bool cam_ignore, uint8_t priority,
> >> - uint32_t logic_serv, XiveTCTXMatch
> >> *match)
> >> -{
> >> - XivePresenter *xptr = XIVE_PRESENTER(xrtr);
> >> - XivePresenterClass *xpc = XIVE_PRESENTER_GET_CLASS(xptr);
> >> - int count;
> >> -
> >> - count = xpc->match_nvt(xptr, format, nvt_blk, nvt_idx, cam_ignore,
> >> - priority, logic_serv, match);
> >> - if (count < 0) {
> >> - return false;
> >> - }
> >> -
> >> - if (!match->tctx) {
> >> - qemu_log_mask(LOG_UNIMP, "XIVE: NVT %x/%x is not dispatched\n",
> >> - nvt_blk, nvt_idx);
> >
> > Maybe keep this trace...
>
> It's in spapr_xive_match_nvt() now.
>
Not really... spapr_xive_match_nvt() has a trace for the opposite case of
duplicate
matches:
if (match->tctx) {
qemu_log_mask(LOG_GUEST_ERROR, "XIVE: already found a thread "
"context NVT %x/%x\n", nvt_blk, nvt_idx);
return -1;
}
> >
> >> - return false;
> >> - }
> >> -
> >> - return true;
> >> -}
> >> -
> >> /*
> >> * This is our simple Xive Presenter Engine model. It is merged in the
> >> * Router as it does not require an extra object.
> >> @@ -1462,22 +1438,32 @@ static bool xive_presenter_match(XiveRouter *xrtr,
> >> uint8_t format,
> >> *
> >> * The parameters represent what is sent on the PowerBus
> >> */
> >> -static bool xive_presenter_notify(XiveRouter *xrtr, uint8_t format,
> >> +static bool xive_presenter_notify(uint8_t format,
> >> uint8_t nvt_blk, uint32_t nvt_idx,
> >> bool cam_ignore, uint8_t priority,
> >> uint32_t logic_serv)
> >> {
> >> + XiveFabric *xfb = XIVE_FABRIC(qdev_get_machine());
> >> + XiveFabricClass *xfc = XIVE_FABRIC_GET_CLASS(xfb);
> >> XiveTCTXMatch match = { .tctx = NULL, .ring = 0 };
> >> - bool found;
> >> + int count;
> >>
> >> - found = xive_presenter_match(xrtr, format, nvt_blk, nvt_idx,
> >> cam_ignore,
> >> - priority, logic_serv, &match);
> >> - if (found) {
> >> + /*
> >> + * Ask the machine to scan the interrupt controllers for a match
> >> + */
> >> + count = xfc->match_nvt(xfb, format, nvt_blk, nvt_idx, cam_ignore,
> >> + priority, logic_serv, &match);
> >> + if (count < 0) {
> >> + return false;
> >> + }
> >> +
> >> + /* handle CPU exception delivery */
> >> + if (count) {
> >> ipb_update(&match.tctx->regs[match.ring], priority);
> >> xive_tctx_notify(match.tctx, match.ring);
> >> }
> >
> > ... in an else block here ^^ ?
> >
> >>
> >> - return found;
> >> + return count;
> >
> > Implicit cast is ok I guess, but !!count would ensure no paranoid
> > compiler ever complains.
>
> yes.
>
> Thanks,
>
> C.
>
>
> >
> >> }
> >>
> >> /*
> >> @@ -1590,7 +1576,7 @@ static void xive_router_end_notify(XiveRouter *xrtr,
> >> uint8_t end_blk,
> >> return;
> >> }
> >>
> >> - found = xive_presenter_notify(xrtr, format, nvt_blk, nvt_idx,
> >> + found = xive_presenter_notify(format, nvt_blk, nvt_idx,
> >> xive_get_field32(END_W7_F0_IGNORE, end.w7),
> >> priority,
> >> xive_get_field32(END_W7_F1_LOG_SERVER_ID,
> >> end.w7));
> >
>
- [PATCH for-5.0 v5 13/23] ppc/pnv: Implement the XiveFabric interface, (continued)
[PATCH for-5.0 v5 15/23] ppc/xive: Use the XiveFabric and XivePresenter interfaces, Cédric Le Goater, 2019/11/15
- Re: [PATCH for-5.0 v5 15/23] ppc/xive: Use the XiveFabric and XivePresenter interfaces, Greg Kurz, 2019/11/20
- Re: [PATCH for-5.0 v5 15/23] ppc/xive: Use the XiveFabric and XivePresenter interfaces, Cédric Le Goater, 2019/11/21
- Re: [PATCH for-5.0 v5 15/23] ppc/xive: Use the XiveFabric and XivePresenter interfaces,
Greg Kurz <=
- Re: [PATCH for-5.0 v5 15/23] ppc/xive: Use the XiveFabric and XivePresenter interfaces, Cédric Le Goater, 2019/11/21
- Re: [PATCH for-5.0 v5 15/23] ppc/xive: Use the XiveFabric and XivePresenter interfaces, Greg Kurz, 2019/11/21
- Re: [PATCH for-5.0 v5 15/23] ppc/xive: Use the XiveFabric and XivePresenter interfaces, Cédric Le Goater, 2019/11/21
- Re: [PATCH for-5.0 v5 15/23] ppc/xive: Use the XiveFabric and XivePresenter interfaces, Greg Kurz, 2019/11/21
[PATCH for-5.0 v5 16/23] ppc/xive: Extend the TIMA operation with a XivePresenter parameter, Cédric Le Goater, 2019/11/15
[PATCH for-5.0 v5 17/23] ppc/pnv: Clarify how the TIMA is accessed on a multichip system, Cédric Le Goater, 2019/11/15
[PATCH for-5.0 v5 18/23] ppc/xive: Move the TIMA operations to the controller model, Cédric Le Goater, 2019/11/15