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| author | Cédric Le Goater <clg@kaod.org> | 2019-07-18 13:54:10 +0200 |
|---|---|---|
| committer | David Gibson <david@gibson.dropbear.id.au> | 2019-08-21 17:17:39 +1000 |
| commit | ad31e2d242399bdaa300b940bbef253331c92ec3 (patch) | |
| tree | 68d3f3b6e03764a5889d2bc50bdd35eb9200174f /hw/intc | |
| parent | 53e934921d660be951167fccad4b6302c4633486 (diff) | |
| download | qemu-ad31e2d242399bdaa300b940bbef253331c92ec3.zip qemu-ad31e2d242399bdaa300b940bbef253331c92ec3.tar.gz qemu-ad31e2d242399bdaa300b940bbef253331c92ec3.tar.bz2 | |
ppc/xive: Provide silent escalation support
When the 's' bit is set the escalation is said to be 'silent' or
'silent/gather'. In such configuration, the notification sequence is
skipped and only the escalation sequence is performed. This is used to
configure all the EQs of a vCPU to escalate on a single EQ which will
then target the hypervisor.
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20190718115420.19919-8-clg@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Diffstat (limited to 'hw/intc')
| -rw-r--r-- | hw/intc/xive.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/hw/intc/xive.c b/hw/intc/xive.c index 3fe84f3..dd7d02d 100644 --- a/hw/intc/xive.c +++ b/hw/intc/xive.c @@ -1486,6 +1486,13 @@ static void xive_router_end_notify(XiveRouter *xrtr, uint8_t end_blk, } /* + * When the END is silent, we skip the notification part. + */ + if (xive_end_is_silent_escalation(&end)) { + goto do_escalation; + } + + /* * The W7 format depends on the F bit in W6. It defines the type * of the notification : * @@ -1564,6 +1571,7 @@ static void xive_router_end_notify(XiveRouter *xrtr, uint8_t end_blk, */ } +do_escalation: /* * If activated, escalate notification using the ESe PQ bits and * the EAS in w4-5 |