From 0c575703e487b6e36d226b67e0c8d08c004ce998 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= Date: Mon, 13 May 2019 10:42:34 +0200 Subject: spapr/xive: add hcall support when under KVM MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 Reviewed-by: David Gibson Message-Id: <20190513084245.25755-4-clg@kaod.org> Signed-off-by: David Gibson --- include/hw/ppc/spapr_xive.h | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'include') 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 */ -- cgit v1.1