From 981b1c6266c60f4eb86e09ef00f1b5dd046525c7 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= Date: Fri, 14 Jun 2019 18:59:19 +0200 Subject: spapr/xive: rework the mapping the KVM memory regions MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Today, the interrupt device is fully initialized at reset when the CAS negotiation process has completed. Depending on the KVM capabilities, the SpaprXive memory regions (ESB, TIMA) are initialized with a host MMIO backend or a QEMU emulated backend. This results in a complex initialization sequence partially done at realize and later at reset, and some memory region leaks. To simplify this sequence and to remove of the late initialization of the emulated device which is required to be done only once, we introduce new memory regions specific for KVM. These regions are mapped as overlaps on top of the emulated device to make use of the host MMIOs. Also provide proper cleanups of these regions when the XIVE KVM device is destroyed to fix the leaks. Signed-off-by: Cédric Le Goater Message-Id: <20190614165920.12670-2-clg@kaod.org> Reviewed-by: Greg Kurz Signed-off-by: David Gibson --- hw/intc/spapr_xive.c | 38 ++++++++++---------------------------- 1 file changed, 10 insertions(+), 28 deletions(-) (limited to 'hw/intc/spapr_xive.c') diff --git a/hw/intc/spapr_xive.c b/hw/intc/spapr_xive.c index 58c2e5d890..3ae311d9ff 100644 --- a/hw/intc/spapr_xive.c +++ b/hw/intc/spapr_xive.c @@ -194,13 +194,6 @@ void spapr_xive_pic_print_info(SpaprXive *xive, Monitor *mon) } } -void spapr_xive_map_mmio(SpaprXive *xive) -{ - sysbus_mmio_map(SYS_BUS_DEVICE(xive), 0, xive->vc_base); - sysbus_mmio_map(SYS_BUS_DEVICE(xive), 1, xive->end_base); - sysbus_mmio_map(SYS_BUS_DEVICE(xive), 2, xive->tm_base); -} - void spapr_xive_mmio_set_enabled(SpaprXive *xive, bool enable) { memory_region_set_enabled(&xive->source.esb_mmio, enable); @@ -305,6 +298,7 @@ static void spapr_xive_realize(DeviceState *dev, Error **errp) error_propagate(errp, local_err); return; } + sysbus_init_mmio(SYS_BUS_DEVICE(xive), &xsrc->esb_mmio); /* * Initialize the END ESB source @@ -318,6 +312,7 @@ static void spapr_xive_realize(DeviceState *dev, Error **errp) error_propagate(errp, local_err); return; } + sysbus_init_mmio(SYS_BUS_DEVICE(xive), &end_xsrc->esb_mmio); /* Set the mapping address of the END ESB pages after the source ESBs */ xive->end_base = xive->vc_base + (1ull << xsrc->esb_shift) * xsrc->nr_irqs; @@ -333,31 +328,18 @@ static void spapr_xive_realize(DeviceState *dev, Error **errp) qemu_register_reset(spapr_xive_reset, dev); - /* Define all XIVE MMIO regions on SysBus */ - sysbus_init_mmio(SYS_BUS_DEVICE(xive), &xsrc->esb_mmio); - sysbus_init_mmio(SYS_BUS_DEVICE(xive), &end_xsrc->esb_mmio); - sysbus_init_mmio(SYS_BUS_DEVICE(xive), &xive->tm_mmio); -} - -void spapr_xive_init(SpaprXive *xive, Error **errp) -{ - XiveSource *xsrc = &xive->source; - - /* - * The emulated XIVE device can only be initialized once. If the - * ESB memory region has been already mapped, it means we have been - * through there. - */ - if (memory_region_is_mapped(&xsrc->esb_mmio)) { - return; - } - /* TIMA initialization */ memory_region_init_io(&xive->tm_mmio, OBJECT(xive), &xive_tm_ops, xive, "xive.tima", 4ull << TM_SHIFT); + sysbus_init_mmio(SYS_BUS_DEVICE(xive), &xive->tm_mmio); - /* Map all regions */ - spapr_xive_map_mmio(xive); + /* + * Map all regions. These will be enabled or disabled at reset and + * can also be overridden by KVM memory regions if active + */ + sysbus_mmio_map(SYS_BUS_DEVICE(xive), 0, xive->vc_base); + sysbus_mmio_map(SYS_BUS_DEVICE(xive), 1, xive->end_base); + sysbus_mmio_map(SYS_BUS_DEVICE(xive), 2, xive->tm_base); } static int spapr_xive_get_eas(XiveRouter *xrtr, uint8_t eas_blk, -- cgit v1.2.3