[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v4 17/27] ARM: vITS: handle INT command
The INT command sets a given LPI identified by a DeviceID/EventID pair as pending and thus triggers it to be injected. Signed-off-by: Andre Przywara <andre.przywara@xxxxxxx> --- xen/arch/arm/vgic-v3-its.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) diff --git a/xen/arch/arm/vgic-v3-its.c b/xen/arch/arm/vgic-v3-its.c index cc1d7a0..dd43eaf 100644 --- a/xen/arch/arm/vgic-v3-its.c +++ b/xen/arch/arm/vgic-v3-its.c @@ -297,6 +297,33 @@ static int its_handle_clear(struct virt_its *its, uint64_t *cmdptr) return 0; } +static int its_handle_int(struct virt_its *its, uint64_t *cmdptr) +{ + uint32_t devid = its_cmd_get_deviceid(cmdptr); + uint32_t eventid = its_cmd_get_id(cmdptr); + struct pending_irq *p; + struct vcpu *vcpu; + uint32_t vlpi; + + if ( !read_itte(its, devid, eventid, &vcpu, &vlpi) ) + return -1; + + p = lpi_to_pending(its->d, vlpi); + if ( !p ) + return -1; + + /* + * If the LPI is enabled, inject it. + * If not, store the pending state to inject it once it gets enabled later. + */ + if ( test_bit(GIC_IRQ_GUEST_ENABLED, &p->status) ) + vgic_vcpu_inject_irq(vcpu, vlpi); + else + set_bit(GIC_IRQ_GUEST_LPI_PENDING, &p->status); + + return 0; +} + #define ITS_CMD_BUFFER_SIZE(baser) ((((baser) & 0xff) + 1) << 12) static int vgic_its_handle_cmds(struct domain *d, struct virt_its *its, @@ -337,6 +364,9 @@ static int vgic_its_handle_cmds(struct domain *d, struct virt_its *its, case GITS_CMD_CLEAR: ret = its_handle_clear(its, cmdptr); break; + case GITS_CMD_INT: + ret = its_handle_int(its, cmdptr); + break; case GITS_CMD_SYNC: /* We handle ITS commands synchronously, so we ignore SYNC. */ break; -- 2.9.0 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx https://lists.xen.org/xen-devel
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