[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v3 23/26] ARM: vITS: handle INVALL command
The INVALL command instructs an ITS to invalidate the configuration data for all LPIs associated with a given redistributor (read: VCPU). This is nasty to emulate exactly with our architecture, so we just scan the pending table and inject _every_ LPI found there that got enabled. Signed-off-by: Andre Przywara <andre.przywara@xxxxxxx> --- xen/arch/arm/vgic-v3-its.c | 46 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) diff --git a/xen/arch/arm/vgic-v3-its.c b/xen/arch/arm/vgic-v3-its.c index 0c479e0..24e7d17 100644 --- a/xen/arch/arm/vgic-v3-its.c +++ b/xen/arch/arm/vgic-v3-its.c @@ -419,6 +419,49 @@ static int its_handle_inv(struct virt_its *its, uint64_t *cmdptr) return 0; } +/* + * INVALL updates the per-LPI configuration status for every LPI mapped to + * a particular redistributor. + * We iterate over all mapped LPIs in our radix tree and update those. + */ +static int its_handle_invall(struct virt_its *its, uint64_t *cmdptr) +{ + uint32_t collid = its_cmd_get_collection(cmdptr); + struct vcpu *vcpu; + struct pending_irq *pirqs[16]; + uint32_t vlpi = 0; + int nr_lpis, i; + + /* We may want to revisit this implementation for DomUs. */ + ASSERT(is_hardware_domain(its->d)); + + spin_lock(&its->its_lock); + vcpu = get_vcpu_from_collection(its, collid); + spin_unlock(&its->its_lock); + + read_lock(&its->d->arch.vgic.pend_lpi_tree_lock); + + do { + nr_lpis = radix_tree_gang_lookup(&its->d->arch.vgic.pend_lpi_tree, + (void **)pirqs, vlpi, + ARRAY_SIZE(pirqs)); + + for ( i = 0; i < nr_lpis; i++ ) + { + vlpi = pirqs[i]->irq; + update_lpi_enabled_status(its, vcpu, vlpi); + } + + /* Protect from overflow when incrementing 0xffffffff */ + if ( vlpi == ~0 || ++vlpi < its->d->arch.vgic.nr_lpis ) + break; + } while ( nr_lpis == ARRAY_SIZE(pirqs)); + + read_unlock(&its->d->arch.vgic.pend_lpi_tree_lock); + + return 0; +} + static int its_handle_mapc(struct virt_its *its, uint64_t *cmdptr) { uint32_t collid = its_cmd_get_collection(cmdptr); @@ -602,6 +645,9 @@ static int vgic_its_handle_cmds(struct domain *d, struct virt_its *its, case GITS_CMD_INV: ret = its_handle_inv(its, cmdptr); break; + case GITS_CMD_INVALL: + ret = its_handle_invall(its, cmdptr); + break; case GITS_CMD_MAPC: ret = its_handle_mapc(its, cmdptr); break; -- 2.9.0 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx https://lists.xen.org/xen-devel
|
Lists.xenproject.org is hosted with RackSpace, monitoring our |