[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [RFC PATCH v2 20/26] ARM: vITS: handle MOVI command
The MOVI command moves the interrupt affinity from one redistributor (read: VCPU) to another. For now migration of "live" LPIs is not yet implemented, but we store the changed affinity in the host LPI structure and in our virtual ITTE. Signed-off-by: Andre Przywara <andre.przywara@xxxxxxx> --- xen/arch/arm/gic-its.c | 14 ++++++++++++++ xen/arch/arm/vgic-its.c | 41 +++++++++++++++++++++++++++++++++++++++++ xen/include/asm-arm/gic-its.h | 2 ++ 3 files changed, 57 insertions(+) diff --git a/xen/arch/arm/gic-its.c b/xen/arch/arm/gic-its.c index 0acbd83..1da28b9 100644 --- a/xen/arch/arm/gic-its.c +++ b/xen/arch/arm/gic-its.c @@ -799,6 +799,20 @@ int gicv3_assign_guest_event(struct domain *d, uint32_t devid, uint32_t eventid, hlpi.vcpu_id = v->vcpu_id; hlpip->data = hlpi.data; + return 0; +} + +/* Changes the target VCPU for a given host LPI assigned to a domain. */ +int gicv3_lpi_change_vcpu(struct domain *d, + uint32_t devid, uint32_t eventid, int vcpu_id) +{ + union host_lpi *hlpip; + + hlpip = find_guest_lpi(d, devid, eventid); + if ( !hlpip ) + return -1; + + hlpip->vcpu_id = vcpu_id; return 0; } diff --git a/xen/arch/arm/vgic-its.c b/xen/arch/arm/vgic-its.c index f9f438a..7c80c17 100644 --- a/xen/arch/arm/vgic-its.c +++ b/xen/arch/arm/vgic-its.c @@ -316,6 +316,41 @@ out_unlock: return ret; } +static int its_handle_movi(struct virt_its *its, uint64_t *cmdptr) +{ + uint32_t devid = its_cmd_get_deviceid(cmdptr); + uint32_t eventid = its_cmd_get_id(cmdptr); + int collid = its_cmd_get_collection(cmdptr); + struct vits_itte *itte; + struct vcpu *vcpu; + + if ( collid >= its->max_collections ) + return -1; + + spin_lock(&its->its_lock); + + vcpu = get_vcpu_from_collection(its, collid); + if ( !vcpu ) + goto out_unlock; + + itte = get_devid_evid(its, devid, eventid); + if ( !itte ) + goto out_unlock; + + itte->collection = collid; + + /* TODO: lookup currently-in-guest virtual IRQs and migrate them */ + + put_devid_evid(its, itte); + +out_unlock: + spin_unlock(&its->its_lock); + + gicv3_lpi_change_vcpu(its->d, devid, eventid, vcpu->vcpu_id); + + 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, @@ -352,6 +387,12 @@ static int vgic_its_handle_cmds(struct domain *d, struct virt_its *its, case GITS_CMD_MAPTI: its_handle_mapti(its, cmdptr); break; + case GITS_CMD_MOVALL: + gdprintk(XENLOG_G_INFO, "ITS: ignoring MOVALL command\n"); + break; + case GITS_CMD_MOVI: + its_handle_movi(its, cmdptr); + break; case GITS_CMD_SYNC: /* We handle ITS commands synchronously, so we ignore SYNC. */ break; diff --git a/xen/include/asm-arm/gic-its.h b/xen/include/asm-arm/gic-its.h index 9843674..c5355f9 100644 --- a/xen/include/asm-arm/gic-its.h +++ b/xen/include/asm-arm/gic-its.h @@ -140,6 +140,8 @@ int gicv3_its_map_device(struct domain *d, int host_devid, int guest_devid, int gicv3_assign_guest_event(struct domain *d, uint32_t devid, uint32_t eventid, struct vcpu *v, uint32_t virt_lpi); +int gicv3_lpi_change_vcpu(struct domain *d, + uint32_t devid, uint32_t eventid, int vcpu_id); #else -- 2.9.0 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx https://lists.xen.org/xen-devel
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