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[Qemu-devel] [PULL 14/48] spapr_pci: Warn when RAM page size is not enab
From: |
David Gibson |
Subject: |
[Qemu-devel] [PULL 14/48] spapr_pci: Warn when RAM page size is not enabled in IOMMU page mask |
Date: |
Wed, 26 Apr 2017 17:00:00 +1000 |
From: Alexey Kardashevskiy <address@hidden>
If a page size used by QEMU is not enabled in the PHB IOMMU page mask,
in-kernel acceleration of TCE handling won't be enabled and performance
might be slower than expected.
This prints a warning if system page size is not enabled. This should
print a warning if huge pages are enabled but sphb.pgsz still uses
the default value of 4K|64K.
Signed-off-by: Alexey Kardashevskiy <address@hidden>
Signed-off-by: David Gibson <address@hidden>
---
hw/ppc/spapr_pci.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/hw/ppc/spapr_pci.c b/hw/ppc/spapr_pci.c
index 98c52e4..097ebdd 100644
--- a/hw/ppc/spapr_pci.c
+++ b/hw/ppc/spapr_pci.c
@@ -1771,6 +1771,12 @@ static void spapr_phb_realize(DeviceState *dev, Error
**errp)
}
/* DMA setup */
+ if ((sphb->page_size_mask & qemu_getrampagesize()) == 0) {
+ error_report("System page size 0x%lx is not enabled in page_size_mask "
+ "(0x%"PRIx64"). Performance may be slow",
+ qemu_getrampagesize(), sphb->page_size_mask);
+ }
+
for (i = 0; i < windows_supported; ++i) {
tcet = spapr_tce_new_table(DEVICE(sphb), sphb->dma_liobn[i]);
if (!tcet) {
--
2.9.3
- [Qemu-devel] [PULL 08/48] target/ppc: Add new H-CALL shells for in memory table translation, (continued)
- [Qemu-devel] [PULL 08/48] target/ppc: Add new H-CALL shells for in memory table translation, David Gibson, 2017/04/26
- [Qemu-devel] [PULL 03/48] ppc/spapr: QOM'ify sPAPRRTCState, David Gibson, 2017/04/26
- [Qemu-devel] [PULL 06/48] spapr: Add ibm, processor-radix-AP-encodings to the device tree, David Gibson, 2017/04/26
- [Qemu-devel] [PULL 17/48] ppc/xics: introduce an 'intc' backlink under PowerPCCPU, David Gibson, 2017/04/26
- [Qemu-devel] [PULL 05/48] target-ppc: kvm: make use of KVM_CREATE_SPAPR_TCE_64, David Gibson, 2017/04/26
- [Qemu-devel] [PULL 11/48] spapr: Enable ISA 3.0 MMU mode selection via CAS, David Gibson, 2017/04/26
- [Qemu-devel] [PULL 18/48] spapr: move the IRQ server number mapping under the machine, David Gibson, 2017/04/26
- [Qemu-devel] [PULL 07/48] target-ppc: support KVM_CAP_PPC_MMU_RADIX, KVM_CAP_PPC_MMU_HASH_V3, David Gibson, 2017/04/26
- [Qemu-devel] [PULL 09/48] target/ppc: Implement H_REGISTER_PROCESS_TABLE H_CALL, David Gibson, 2017/04/26
- [Qemu-devel] [PULL 16/48] target/ppc: Add ibm, processor-radix-AP-encodings for TCG, David Gibson, 2017/04/26
- [Qemu-devel] [PULL 14/48] spapr_pci: Warn when RAM page size is not enabled in IOMMU page mask,
David Gibson <=
- [Qemu-devel] [PULL 13/48] target-ppc/kvm: Enable in-kernel TCE acceleration for multi-tce, David Gibson, 2017/04/26
- [Qemu-devel] [PULL 20/48] ppc/xics: add a realize() handler to ICPStateClass, David Gibson, 2017/04/26
- [Qemu-devel] [PULL 23/48] ppc/pnv: extend the machine with a InterruptStatsProvider interface, David Gibson, 2017/04/26
- [Qemu-devel] [PULL 22/48] ppc/pnv: extend the machine with a XICSFabric interface, David Gibson, 2017/04/26
- [Qemu-devel] [PULL 19/48] spapr: allocate the ICPState object from under sPAPRCPUCore, David Gibson, 2017/04/26
- [Qemu-devel] [PULL 10/48] spapr: move spapr_populate_pa_features(), David Gibson, 2017/04/26
- [Qemu-devel] [PULL 15/48] spapr_pci: Removed unused include, David Gibson, 2017/04/26
- [Qemu-devel] [PULL 25/48] ppc/pnv: add a helper to calculate MMIO addresses registers, David Gibson, 2017/04/26
- [Qemu-devel] [PULL 33/48] ipmi: introduce an ipmi_bmc_gen_event() API, David Gibson, 2017/04/26
- [Qemu-devel] [PULL 12/48] spapr: Workaround for broken radix guests, David Gibson, 2017/04/26