From 425f0b7adb8773d6989abcf3cb19bf0bcab9e07e Mon Sep 17 00:00:00 2001 From: David Gibson Date: Fri, 29 Nov 2019 11:49:04 +1100 Subject: spapr: Clean up RMA size calculation MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Move the calculation of the Real Mode Area (RMA) size into a helper function. While we're there clean it up and correct it in a few ways: * Add comments making it clearer where the various constraints come from * Remove a pointless check that the RMA fits within Node 0 (we've just clamped it so that it does) Signed-off-by: David Gibson Reviewed-by: Greg Kurz Reviewed-by: Philippe Mathieu-Daudé --- hw/ppc/spapr.c | 61 +++++++++++++++++++++++++++++++++++----------------------- 1 file changed, 37 insertions(+), 24 deletions(-) (limited to 'hw/ppc') diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c index 95bda4a615..1950fc303e 100644 --- a/hw/ppc/spapr.c +++ b/hw/ppc/spapr.c @@ -2648,6 +2648,42 @@ static PCIHostState *spapr_create_default_phb(void) return PCI_HOST_BRIDGE(dev); } +static hwaddr spapr_rma_size(SpaprMachineState *spapr, Error **errp) +{ + MachineState *machine = MACHINE(spapr); + SpaprMachineClass *smc = SPAPR_MACHINE_GET_CLASS(spapr); + hwaddr rma_size = machine->ram_size; + hwaddr node0_size = spapr_node0_size(machine); + + /* RMA has to fit in the first NUMA node */ + rma_size = MIN(rma_size, node0_size); + + /* + * VRMA access is via a special 1TiB SLB mapping, so the RMA can + * never exceed that + */ + rma_size = MIN(rma_size, 1 * TiB); + + /* + * Clamp the RMA size based on machine type. This is for + * migration compatibility with older qemu versions, which limited + * the RMA size for complicated and mostly bad reasons. + */ + if (smc->rma_limit) { + rma_size = MIN(rma_size, smc->rma_limit); + } + + if (rma_size < MIN_RMA_SLOF) { + error_setg(errp, + "pSeries SLOF firmware requires >= %" HWADDR_PRIx + "ldMiB guest RMA (Real Mode Area memory)", + MIN_RMA_SLOF / MiB); + return 0; + } + + return rma_size; +} + /* pSeries LPAR / sPAPR hardware init */ static void spapr_machine_init(MachineState *machine) { @@ -2659,7 +2695,6 @@ static void spapr_machine_init(MachineState *machine) PCIHostState *phb; int i; MemoryRegion *sysmem = get_system_memory(); - hwaddr node0_size = spapr_node0_size(machine); long load_limit, fw_size; char *filename; Error *resize_hpt_err = NULL; @@ -2699,22 +2734,7 @@ static void spapr_machine_init(MachineState *machine) exit(1); } - spapr->rma_size = node0_size; - - /* - * Clamp the RMA size based on machine type. This is for - * migration compatibility with older qemu versions, which limited - * the RMA size for complicated and mostly bad reasons. - */ - if (smc->rma_limit) { - spapr->rma_size = MIN(spapr->rma_size, smc->rma_limit); - } - - if (spapr->rma_size > node0_size) { - error_report("Numa node 0 has to span the RMA (%#08"HWADDR_PRIx")", - spapr->rma_size); - exit(1); - } + spapr->rma_size = spapr_rma_size(spapr, &error_fatal); /* Setup a load limit for the ramdisk leaving room for SLOF and FDT */ load_limit = MIN(spapr->rma_size, RTAS_MAX_ADDR) - FW_OVERHEAD; @@ -2951,13 +2971,6 @@ static void spapr_machine_init(MachineState *machine) } } - if (spapr->rma_size < MIN_RMA_SLOF) { - error_report( - "pSeries SLOF firmware requires >= %ldMiB guest RMA (Real Mode Area memory)", - MIN_RMA_SLOF / MiB); - exit(1); - } - if (kernel_filename) { uint64_t lowaddr = 0; -- cgit v1.2.3