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| author | Cédric Le Goater <clg@kaod.org> | 2019-05-13 10:42:34 +0200 |
|---|---|---|
| committer | David Gibson <david@gibson.dropbear.id.au> | 2019-05-29 11:39:45 +1000 |
| commit | 0c575703e487b6e36d226b67e0c8d08c004ce998 (patch) | |
| tree | 65df568ec35b18ea8029da81f5f0a4672dff2efd /include | |
| parent | 38afd772f802ff787ea16af73b0c0d24a8c46b6c (diff) | |
| download | qemu-0c575703e487b6e36d226b67e0c8d08c004ce998.zip qemu-0c575703e487b6e36d226b67e0c8d08c004ce998.tar.gz qemu-0c575703e487b6e36d226b67e0c8d08c004ce998.tar.bz2 | |
spapr/xive: add hcall support when under KVM
XIVE hcalls are all redirected to QEMU as none are on a fast path.
When necessary, QEMU invokes KVM through specific ioctls to perform
host operations. QEMU should have done the necessary checks before
calling KVM and, in case of failure, H_HARDWARE is simply returned.
H_INT_ESB is a special case that could have been handled under KVM
but the impact on performance was low when under QEMU. Here are some
figures :
kernel irqchip OFF ON
H_INT_ESB KVM QEMU
rtl8139 (LSI ) 1.19 1.24 1.23 Gbits/sec
virtio 31.80 42.30 -- Gbits/sec
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <20190513084245.25755-4-clg@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Diffstat (limited to 'include')
| -rw-r--r-- | include/hw/ppc/spapr_xive.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/include/hw/ppc/spapr_xive.h b/include/hw/ppc/spapr_xive.h index 0edcc76..0368591 100644 --- a/include/hw/ppc/spapr_xive.h +++ b/include/hw/ppc/spapr_xive.h @@ -55,9 +55,24 @@ void spapr_xive_set_tctx_os_cam(XiveTCTX *tctx); void spapr_xive_mmio_set_enabled(SpaprXive *xive, bool enable); void spapr_xive_map_mmio(SpaprXive *xive); +int spapr_xive_end_to_target(uint8_t end_blk, uint32_t end_idx, + uint32_t *out_server, uint8_t *out_prio); + /* * KVM XIVE device helpers */ void kvmppc_xive_connect(SpaprXive *xive, Error **errp); +void kvmppc_xive_reset(SpaprXive *xive, Error **errp); +void kvmppc_xive_set_source_config(SpaprXive *xive, uint32_t lisn, XiveEAS *eas, + Error **errp); +void kvmppc_xive_sync_source(SpaprXive *xive, uint32_t lisn, Error **errp); +uint64_t kvmppc_xive_esb_rw(XiveSource *xsrc, int srcno, uint32_t offset, + uint64_t data, bool write); +void kvmppc_xive_set_queue_config(SpaprXive *xive, uint8_t end_blk, + uint32_t end_idx, XiveEND *end, + Error **errp); +void kvmppc_xive_get_queue_config(SpaprXive *xive, uint8_t end_blk, + uint32_t end_idx, XiveEND *end, + Error **errp); #endif /* PPC_SPAPR_XIVE_H */ |