From 5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Tue, 21 Feb 2023 18:24:12 -0800 Subject: Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next Pull networking updates from Jakub Kicinski: "Core: - Add dedicated kmem_cache for typical/small skb->head, avoid having to access struct page at kfree time, and improve memory use. - Introduce sysctl to set default RPS configuration for new netdevs. - Define Netlink protocol specification format which can be used to describe messages used by each family and auto-generate parsers. Add tools for generating kernel data structures and uAPI headers. - Expose all net/core sysctls inside netns. - Remove 4s sleep in netpoll if carrier is instantly detected on boot. - Add configurable limit of MDB entries per port, and port-vlan. - Continue populating drop reasons throughout the stack. - Retire a handful of legacy Qdiscs and classifiers. Protocols: - Support IPv4 big TCP (TSO frames larger than 64kB). - Add IP_LOCAL_PORT_RANGE socket option, to control local port range on socket by socket basis. - Track and report in procfs number of MPTCP sockets used. - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path manager. - IPv6: don't check net.ipv6.route.max_size and rely on garbage collection to free memory (similarly to IPv4). - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986). - ICMP: add per-rate limit counters. - Add support for user scanning requests in ieee802154. - Remove static WEP support. - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate reporting. - WiFi 7 EHT channel puncturing support (client & AP). BPF: - Add a rbtree data structure following the "next-gen data structure" precedent set by recently added linked list, that is, by using kfunc + kptr instead of adding a new BPF map type. - Expose XDP hints via kfuncs with initial support for RX hash and timestamp metadata. - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to better support decap on GRE tunnel devices not operating in collect metadata. - Improve x86 JIT's codegen for PROBE_MEM runtime error checks. - Remove the need for trace_printk_lock for bpf_trace_printk and bpf_trace_vprintk helpers. - Extend libbpf's bpf_tracing.h support for tracing arguments of kprobes/uprobes and syscall as a special case. - Significantly reduce the search time for module symbols by livepatch and BPF. - Enable cpumasks to be used as kptrs, which is useful for tracing programs tracking which tasks end up running on which CPUs in different time intervals. - Add support for BPF trampoline on s390x and riscv64. - Add capability to export the XDP features supported by the NIC. - Add __bpf_kfunc tag for marking kernel functions as kfuncs. - Add cgroup.memory=nobpf kernel parameter option to disable BPF memory accounting for container environments. Netfilter: - Remove the CLUSTERIP target. It has been marked as obsolete for years, and we still have WARN splats wrt races of the out-of-band /proc interface installed by this target. - Add 'destroy' commands to nf_tables. They are identical to the existing 'delete' commands, but do not return an error if the referenced object (set, chain, rule...) did not exist. Driver API: - Improve cpumask_local_spread() locality to help NICs set the right IRQ affinity on AMD platforms. - Separate C22 and C45 MDIO bus transactions more clearly. - Introduce new DCB table to control DSCP rewrite on egress. - Support configuration of Physical Layer Collision Avoidance (PLCA) Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of shared medium Ethernet. - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing preemption of low priority frames by high priority frames. - Add support for controlling MACSec offload using netlink SET. - Rework devlink instance refcounts to allow registration and de-registration under the instance lock. Split the code into multiple files, drop some of the unnecessarily granular locks and factor out common parts of netlink operation handling. - Add TX frame aggregation parameters (for USB drivers). - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning messages with notifications for debug. - Allow offloading of UDP NEW connections via act_ct. - Add support for per action HW stats in TC. - Support hardware miss to TC action (continue processing in SW from a specific point in the action chain). - Warn if old Wireless Extension user space interface is used with modern cfg80211/mac80211 drivers. Do not support Wireless Extensions for Wi-Fi 7 devices at all. Everyone should switch to using nl80211 interface instead. - Improve the CAN bit timing configuration. Use extack to return error messages directly to user space, update the SJW handling, including the definition of a new default value that will benefit CAN-FD controllers, by increasing their oscillator tolerance. New hardware / drivers: - Ethernet: - nVidia BlueField-3 support (control traffic driver) - Ethernet support for imx93 SoCs - Motorcomm yt8531 gigabit Ethernet PHY - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA) - Microchip LAN8841 PHY (incl. cable diagnostics and PTP) - Amlogic gxl MDIO mux - WiFi: - RealTek RTL8188EU (rtl8xxxu) - Qualcomm Wi-Fi 7 devices (ath12k) - CAN: - Renesas R-Car V4H Drivers: - Bluetooth: - Set Per Platform Antenna Gain (PPAG) for Intel controllers. - Ethernet NICs: - Intel (1G, igc): - support TSN / Qbv / packet scheduling features of i226 model - Intel (100G, ice): - use GNSS subsystem instead of TTY - multi-buffer XDP support - extend support for GPIO pins to E823 devices - nVidia/Mellanox: - update the shared buffer configuration on PFC commands - implement PTP adjphase function for HW offset control - TC support for Geneve and GRE with VF tunnel offload - more efficient crypto key management method - multi-port eswitch support - Netronome/Corigine: - add DCB IEEE support - support IPsec offloading for NFP3800 - Freescale/NXP (enetc): - support XDP_REDIRECT for XDP non-linear buffers - improve reconfig, avoid link flap and waiting for idle - support MAC Merge layer - Other NICs: - sfc/ef100: add basic devlink support for ef100 - ionic: rx_push mode operation (writing descriptors via MMIO) - bnxt: use the auxiliary bus abstraction for RDMA - r8169: disable ASPM and reset bus in case of tx timeout - cpsw: support QSGMII mode for J721e CPSW9G - cpts: support pulse-per-second output - ngbe: add an mdio bus driver - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing - r8152: handle devices with FW with NCM support - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation - virtio-net: support multi buffer XDP - virtio/vsock: replace virtio_vsock_pkt with sk_buff - tsnep: XDP support - Ethernet high-speed switches: - nVidia/Mellanox (mlxsw): - add support for latency TLV (in FW control messages) - Microchip (sparx5): - separate explicit and implicit traffic forwarding rules, make the implicit rules always active - add support for egress DSCP rewrite - IS0 VCAP support (Ingress Classification) - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS etc.) - ES2 VCAP support (Egress Access Control) - support for Per-Stream Filtering and Policing (802.1Q, 8.6.5.1) - Ethernet embedded switches: - Marvell (mv88e6xxx): - add MAB (port auth) offload support - enable PTP receive for mv88e6390 - NXP (ocelot): - support MAC Merge layer - support for the the vsc7512 internal copper phys - Microchip: - lan9303: convert to PHYLINK - lan966x: support TC flower filter statistics - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x - lan937x: support Credit Based Shaper configuration - ksz9477: support Energy Efficient Ethernet - other: - qca8k: convert to regmap read/write API, use bulk operations - rswitch: Improve TX timestamp accuracy - Intel WiFi (iwlwifi): - EHT (Wi-Fi 7) rate reporting - STEP equalizer support: transfer some STEP (connection to radio on platforms with integrated wifi) related parameters from the BIOS to the firmware. - Qualcomm 802.11ax WiFi (ath11k): - IPQ5018 support - Fine Timing Measurement (FTM) responder role support - channel 177 support - MediaTek WiFi (mt76): - per-PHY LED support - mt7996: EHT (Wi-Fi 7) support - Wireless Ethernet Dispatch (WED) reset support - switch to using page pool allocator - RealTek WiFi (rtw89): - support new version of Bluetooth co-existance - Mobile: - rmnet: support TX aggregation" * tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits) page_pool: add a comment explaining the fragment counter usage net: ethtool: fix __ethtool_dev_mm_supported() implementation ethtool: pse-pd: Fix double word in comments xsk: add linux/vmalloc.h to xsk.c sefltests: netdevsim: wait for devlink instance after netns removal selftest: fib_tests: Always cleanup before exit net/mlx5e: Align IPsec ASO result memory to be as required by hardware net/mlx5e: TC, Set CT miss to the specific ct action instance net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG net/mlx5: Refactor tc miss handling to a single function net/mlx5: Kconfig: Make tc offload depend on tc skb extension net/sched: flower: Support hardware miss to tc action net/sched: flower: Move filter handle initialization earlier net/sched: cls_api: Support hardware miss to tc action net/sched: Rename user cookie and act cookie sfc: fix builds without CONFIG_RTC_LIB sfc: clean up some inconsistent indentings net/mlx4_en: Introduce flexible array to silence overflow warning net: lan966x: Fix possible deadlock inside PTP net/ulp: Remove redundant ->clone() test in inet_clone_ulp(). ... --- arch/powerpc/mm/init_64.c | 527 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 527 insertions(+) create mode 100644 arch/powerpc/mm/init_64.c (limited to 'arch/powerpc/mm/init_64.c') diff --git a/arch/powerpc/mm/init_64.c b/arch/powerpc/mm/init_64.c new file mode 100644 index 000000000..05b0d584e --- /dev/null +++ b/arch/powerpc/mm/init_64.c @@ -0,0 +1,527 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * PowerPC version + * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org) + * + * Modifications by Paul Mackerras (PowerMac) (paulus@cs.anu.edu.au) + * and Cort Dougan (PReP) (cort@cs.nmt.edu) + * Copyright (C) 1996 Paul Mackerras + * + * Derived from "arch/i386/mm/init.c" + * Copyright (C) 1991, 1992, 1993, 1994 Linus Torvalds + * + * Dave Engebretsen + * Rework for PPC64 port. + */ + +#undef DEBUG + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#ifdef CONFIG_SPARSEMEM_VMEMMAP +/* + * Given an address within the vmemmap, determine the page that + * represents the start of the subsection it is within. Note that we have to + * do this by hand as the proffered address may not be correctly aligned. + * Subtraction of non-aligned pointers produces undefined results. + */ +static struct page * __meminit vmemmap_subsection_start(unsigned long vmemmap_addr) +{ + unsigned long start_pfn; + unsigned long offset = vmemmap_addr - ((unsigned long)(vmemmap)); + + /* Return the pfn of the start of the section. */ + start_pfn = (offset / sizeof(struct page)) & PAGE_SUBSECTION_MASK; + return pfn_to_page(start_pfn); +} + +/* + * Since memory is added in sub-section chunks, before creating a new vmemmap + * mapping, the kernel should check whether there is an existing memmap mapping + * covering the new subsection added. This is needed because kernel can map + * vmemmap area using 16MB pages which will cover a memory range of 16G. Such + * a range covers multiple subsections (2M) + * + * If any subsection in the 16G range mapped by vmemmap is valid we consider the + * vmemmap populated (There is a page table entry already present). We can't do + * a page table lookup here because with the hash translation we don't keep + * vmemmap details in linux page table. + */ +static int __meminit vmemmap_populated(unsigned long vmemmap_addr, int vmemmap_map_size) +{ + struct page *start; + unsigned long vmemmap_end = vmemmap_addr + vmemmap_map_size; + start = vmemmap_subsection_start(vmemmap_addr); + + for (; (unsigned long)start < vmemmap_end; start += PAGES_PER_SUBSECTION) + /* + * pfn valid check here is intended to really check + * whether we have any subsection already initialized + * in this range. + */ + if (pfn_valid(page_to_pfn(start))) + return 1; + + return 0; +} + +/* + * vmemmap virtual address space management does not have a traditional page + * table to track which virtual struct pages are backed by physical mapping. + * The virtual to physical mappings are tracked in a simple linked list + * format. 'vmemmap_list' maintains the entire vmemmap physical mapping at + * all times where as the 'next' list maintains the available + * vmemmap_backing structures which have been deleted from the + * 'vmemmap_global' list during system runtime (memory hotplug remove + * operation). The freed 'vmemmap_backing' structures are reused later when + * new requests come in without allocating fresh memory. This pointer also + * tracks the allocated 'vmemmap_backing' structures as we allocate one + * full page memory at a time when we dont have any. + */ +struct vmemmap_backing *vmemmap_list; +static struct vmemmap_backing *next; + +/* + * The same pointer 'next' tracks individual chunks inside the allocated + * full page during the boot time and again tracks the freed nodes during + * runtime. It is racy but it does not happen as they are separated by the + * boot process. Will create problem if some how we have memory hotplug + * operation during boot !! + */ +static int num_left; +static int num_freed; + +static __meminit struct vmemmap_backing * vmemmap_list_alloc(int node) +{ + struct vmemmap_backing *vmem_back; + /* get from freed entries first */ + if (num_freed) { + num_freed--; + vmem_back = next; + next = next->list; + + return vmem_back; + } + + /* allocate a page when required and hand out chunks */ + if (!num_left) { + next = vmemmap_alloc_block(PAGE_SIZE, node); + if (unlikely(!next)) { + WARN_ON(1); + return NULL; + } + num_left = PAGE_SIZE / sizeof(struct vmemmap_backing); + } + + num_left--; + + return next++; +} + +static __meminit int vmemmap_list_populate(unsigned long phys, + unsigned long start, + int node) +{ + struct vmemmap_backing *vmem_back; + + vmem_back = vmemmap_list_alloc(node); + if (unlikely(!vmem_back)) { + pr_debug("vmemap list allocation failed\n"); + return -ENOMEM; + } + + vmem_back->phys = phys; + vmem_back->virt_addr = start; + vmem_back->list = vmemmap_list; + + vmemmap_list = vmem_back; + return 0; +} + +static bool altmap_cross_boundary(struct vmem_altmap *altmap, unsigned long start, + unsigned long page_size) +{ + unsigned long nr_pfn = page_size / sizeof(struct page); + unsigned long start_pfn = page_to_pfn((struct page *)start); + + if ((start_pfn + nr_pfn) > altmap->end_pfn) + return true; + + if (start_pfn < altmap->base_pfn) + return true; + + return false; +} + +int __meminit vmemmap_populate(unsigned long start, unsigned long end, int node, + struct vmem_altmap *altmap) +{ + bool altmap_alloc; + unsigned long page_size = 1 << mmu_psize_defs[mmu_vmemmap_psize].shift; + + /* Align to the page size of the linear mapping. */ + start = ALIGN_DOWN(start, page_size); + + pr_debug("vmemmap_populate %lx..%lx, node %d\n", start, end, node); + + for (; start < end; start += page_size) { + void *p = NULL; + int rc; + + /* + * This vmemmap range is backing different subsections. If any + * of that subsection is marked valid, that means we already + * have initialized a page table covering this range and hence + * the vmemmap range is populated. + */ + if (vmemmap_populated(start, page_size)) + continue; + + /* + * Allocate from the altmap first if we have one. This may + * fail due to alignment issues when using 16MB hugepages, so + * fall back to system memory if the altmap allocation fail. + */ + if (altmap && !altmap_cross_boundary(altmap, start, page_size)) { + p = vmemmap_alloc_block_buf(page_size, node, altmap); + if (!p) + pr_debug("altmap block allocation failed, falling back to system memory"); + else + altmap_alloc = true; + } + if (!p) { + p = vmemmap_alloc_block_buf(page_size, node, NULL); + altmap_alloc = false; + } + if (!p) + return -ENOMEM; + + if (vmemmap_list_populate(__pa(p), start, node)) { + /* + * If we don't populate vmemap list, we don't have + * the ability to free the allocated vmemmap + * pages in section_deactivate. Hence free them + * here. + */ + int nr_pfns = page_size >> PAGE_SHIFT; + unsigned long page_order = get_order(page_size); + + if (altmap_alloc) + vmem_altmap_free(altmap, nr_pfns); + else + free_pages((unsigned long)p, page_order); + return -ENOMEM; + } + + pr_debug(" * %016lx..%016lx allocated at %p\n", + start, start + page_size, p); + + rc = vmemmap_create_mapping(start, page_size, __pa(p)); + if (rc < 0) { + pr_warn("%s: Unable to create vmemmap mapping: %d\n", + __func__, rc); + return -EFAULT; + } + } + + return 0; +} + +#ifdef CONFIG_MEMORY_HOTPLUG +static unsigned long vmemmap_list_free(unsigned long start) +{ + struct vmemmap_backing *vmem_back, *vmem_back_prev; + + vmem_back_prev = vmem_back = vmemmap_list; + + /* look for it with prev pointer recorded */ + for (; vmem_back; vmem_back = vmem_back->list) { + if (vmem_back->virt_addr == start) + break; + vmem_back_prev = vmem_back; + } + + if (unlikely(!vmem_back)) + return 0; + + /* remove it from vmemmap_list */ + if (vmem_back == vmemmap_list) /* remove head */ + vmemmap_list = vmem_back->list; + else + vmem_back_prev->list = vmem_back->list; + + /* next point to this freed entry */ + vmem_back->list = next; + next = vmem_back; + num_freed++; + + return vmem_back->phys; +} + +void __ref vmemmap_free(unsigned long start, unsigned long end, + struct vmem_altmap *altmap) +{ + unsigned long page_size = 1 << mmu_psize_defs[mmu_vmemmap_psize].shift; + unsigned long page_order = get_order(page_size); + unsigned long alt_start = ~0, alt_end = ~0; + unsigned long base_pfn; + + start = ALIGN_DOWN(start, page_size); + if (altmap) { + alt_start = altmap->base_pfn; + alt_end = altmap->base_pfn + altmap->reserve + + altmap->free + altmap->alloc + altmap->align; + } + + pr_debug("vmemmap_free %lx...%lx\n", start, end); + + for (; start < end; start += page_size) { + unsigned long nr_pages, addr; + struct page *page; + + /* + * We have already marked the subsection we are trying to remove + * invalid. So if we want to remove the vmemmap range, we + * need to make sure there is no subsection marked valid + * in this range. + */ + if (vmemmap_populated(start, page_size)) + continue; + + addr = vmemmap_list_free(start); + if (!addr) + continue; + + page = pfn_to_page(addr >> PAGE_SHIFT); + nr_pages = 1 << page_order; + base_pfn = PHYS_PFN(addr); + + if (base_pfn >= alt_start && base_pfn < alt_end) { + vmem_altmap_free(altmap, nr_pages); + } else if (PageReserved(page)) { + /* allocated from bootmem */ + if (page_size < PAGE_SIZE) { + /* + * this shouldn't happen, but if it is + * the case, leave the memory there + */ + WARN_ON_ONCE(1); + } else { + while (nr_pages--) + free_reserved_page(page++); + } + } else { + free_pages((unsigned long)(__va(addr)), page_order); + } + + vmemmap_remove_mapping(start, page_size); + } +} +#endif +void register_page_bootmem_memmap(unsigned long section_nr, + struct page *start_page, unsigned long size) +{ +} + +#endif /* CONFIG_SPARSEMEM_VMEMMAP */ + +#ifdef CONFIG_PPC_BOOK3S_64 +unsigned int mmu_lpid_bits; +#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE +EXPORT_SYMBOL_GPL(mmu_lpid_bits); +#endif +unsigned int mmu_pid_bits; + +static bool disable_radix = !IS_ENABLED(CONFIG_PPC_RADIX_MMU_DEFAULT); + +static int __init parse_disable_radix(char *p) +{ + bool val; + + if (!p) + val = true; + else if (kstrtobool(p, &val)) + return -EINVAL; + + disable_radix = val; + + return 0; +} +early_param("disable_radix", parse_disable_radix); + +/* + * If we're running under a hypervisor, we need to check the contents of + * /chosen/ibm,architecture-vec-5 to see if the hypervisor is willing to do + * radix. If not, we clear the radix feature bit so we fall back to hash. + */ +static void __init early_check_vec5(void) +{ + unsigned long root, chosen; + int size; + const u8 *vec5; + u8 mmu_supported; + + root = of_get_flat_dt_root(); + chosen = of_get_flat_dt_subnode_by_name(root, "chosen"); + if (chosen == -FDT_ERR_NOTFOUND) { + cur_cpu_spec->mmu_features &= ~MMU_FTR_TYPE_RADIX; + return; + } + vec5 = of_get_flat_dt_prop(chosen, "ibm,architecture-vec-5", &size); + if (!vec5) { + cur_cpu_spec->mmu_features &= ~MMU_FTR_TYPE_RADIX; + return; + } + if (size <= OV5_INDX(OV5_MMU_SUPPORT)) { + cur_cpu_spec->mmu_features &= ~MMU_FTR_TYPE_RADIX; + return; + } + + /* Check for supported configuration */ + mmu_supported = vec5[OV5_INDX(OV5_MMU_SUPPORT)] & + OV5_FEAT(OV5_MMU_SUPPORT); + if (mmu_supported == OV5_FEAT(OV5_MMU_RADIX)) { + /* Hypervisor only supports radix - check enabled && GTSE */ + if (!early_radix_enabled()) { + pr_warn("WARNING: Ignoring cmdline option disable_radix\n"); + } + if (!(vec5[OV5_INDX(OV5_RADIX_GTSE)] & + OV5_FEAT(OV5_RADIX_GTSE))) { + cur_cpu_spec->mmu_features &= ~MMU_FTR_GTSE; + } else + cur_cpu_spec->mmu_features |= MMU_FTR_GTSE; + /* Do radix anyway - the hypervisor said we had to */ + cur_cpu_spec->mmu_features |= MMU_FTR_TYPE_RADIX; + } else if (mmu_supported == OV5_FEAT(OV5_MMU_HASH)) { + /* Hypervisor only supports hash - disable radix */ + cur_cpu_spec->mmu_features &= ~MMU_FTR_TYPE_RADIX; + cur_cpu_spec->mmu_features &= ~MMU_FTR_GTSE; + } +} + +static int __init dt_scan_mmu_pid_width(unsigned long node, + const char *uname, int depth, + void *data) +{ + int size = 0; + const __be32 *prop; + const char *type = of_get_flat_dt_prop(node, "device_type", NULL); + + /* We are scanning "cpu" nodes only */ + if (type == NULL || strcmp(type, "cpu") != 0) + return 0; + + /* Find MMU LPID, PID register size */ + prop = of_get_flat_dt_prop(node, "ibm,mmu-lpid-bits", &size); + if (prop && size == 4) + mmu_lpid_bits = be32_to_cpup(prop); + + prop = of_get_flat_dt_prop(node, "ibm,mmu-pid-bits", &size); + if (prop && size == 4) + mmu_pid_bits = be32_to_cpup(prop); + + if (!mmu_pid_bits && !mmu_lpid_bits) + return 0; + + return 1; +} + +void __init mmu_early_init_devtree(void) +{ + bool hvmode = !!(mfmsr() & MSR_HV); + + /* Disable radix mode based on kernel command line. */ + if (disable_radix) { + if (IS_ENABLED(CONFIG_PPC_64S_HASH_MMU)) + cur_cpu_spec->mmu_features &= ~MMU_FTR_TYPE_RADIX; + else + pr_warn("WARNING: Ignoring cmdline option disable_radix\n"); + } + + of_scan_flat_dt(dt_scan_mmu_pid_width, NULL); + if (hvmode && !mmu_lpid_bits) { + if (early_cpu_has_feature(CPU_FTR_ARCH_207S)) + mmu_lpid_bits = 12; /* POWER8-10 */ + else + mmu_lpid_bits = 10; /* POWER7 */ + } + if (!mmu_pid_bits) { + if (early_cpu_has_feature(CPU_FTR_ARCH_300)) + mmu_pid_bits = 20; /* POWER9-10 */ + } + + /* + * Check /chosen/ibm,architecture-vec-5 if running as a guest. + * When running bare-metal, we can use radix if we like + * even though the ibm,architecture-vec-5 property created by + * skiboot doesn't have the necessary bits set. + */ + if (!hvmode) + early_check_vec5(); + + if (early_radix_enabled()) { + radix__early_init_devtree(); + + /* + * We have finalized the translation we are going to use by now. + * Radix mode is not limited by RMA / VRMA addressing. + * Hence don't limit memblock allocations. + */ + ppc64_rma_size = ULONG_MAX; + memblock_set_current_limit(MEMBLOCK_ALLOC_ANYWHERE); + } else + hash__early_init_devtree(); + + if (IS_ENABLED(CONFIG_HUGETLB_PAGE_SIZE_VARIABLE)) + hugetlbpage_init_defaultsize(); + + if (!(cur_cpu_spec->mmu_features & MMU_FTR_HPTE_TABLE) && + !(cur_cpu_spec->mmu_features & MMU_FTR_TYPE_RADIX)) + panic("kernel does not support any MMU type offered by platform"); +} +#endif /* CONFIG_PPC_BOOK3S_64 */ -- cgit v1.2.3