Re: Testing the recent RISC-V DT patchsets

From: Atish Patra
Date: Tue May 28 2019 - 15:42:23 EST

> On 5/28/19 1:33 AM, Paul Walmsley wrote:
> An update for those testing RISC-V patches: here's a new branch of
> riscv-pk/bbl that doesn't try to read or modify the DT data at all, which
> should be useful until U-Boot settles down. This new riscv-pk version
> should be easier to use than the previous version for those testing
> upstream-bound kernel DT data on SiFive hardware:
> https://github.com/sifive/riscv-pk/tree/dev/paulw/configurable-machine-data-methods-v1
> To build a BBL that doesn't touch the DT data, use the
> "--with-config-method=hifive_unleashed" switch for the "configure" script.
> As before, this version of riscv-pk can take a DTB that can be passed
> along to the kernel. But this time the path to the DTB can be specified
> on the "configure" script command line.
> Below is an example of how to configure it. (The directory structure
> should be familiar to those using the v1_0 tag of freedom-u-sdk, with the
> kernel source in ./linux, riscv-pk source in ./riscv-pk, and build trees
> in work/{linux,riscv-pk}.)
> cd work/riscv-pk
> CC=/opt/rv64gc-mmu-linux-8.2.0/bin/riscv64-unknown-linux-gnu-gcc ../../riscv-pk/configure \
> --host=riscv64-unknown-linux-gnu \
> --with-payload=../../work/linux/vmlinux-stripped \
> --with-config-method=hifive_unleashed \
> --enable-dtb \
> --with-dtb-path=../../work/linux/arch/riscv/boot/dts/sifive/hifive-unleashed-a00.dtb
> Here is an Linux kernel branch with updated DT data that can be booted
> with the above bootloader:
> https://github.com/sifive/riscv-linux/tree/dev/paulw/dts-v5.2-rc1-experimental

Hi Paul,
I see your branch has the DT where the hart0 is marked disabled and M-mode interrupts are masked in PLIC DT entry. IIRC, your v1 patch series for DT didn't have those fixes.

I am assuming that you are planning to upstream these changes as well and it will be part of your v2 patch. Is that correct ?

> A sample boot log follows, using a 'defconfig' build from that branch.
> - Paul
> iFive FSBL: 2019-04-22-1081db9
> Using FSBL DTB
> HiFive-U serial #: 0000002d
> Loading boot payload................................
> bbl loader
> Relocated DTB from 0000000080007040 to 0000000083200000
> [ 0.000000] OF: fdt: Ignoring memory range 0x80000000 - 0x80200000
> [ 0.000000] Linux version 5.2.0-rc1-00006-ge4a86563f655 (paulw@viisi) (gcc version 8.2.0 (GCC)) #65 SMP Mon May 27 23:36:33 PDT 2019
> [ 0.000000] earlycon: sifive0 at MMIO 0x0000000010010000 (options '')
> [ 0.000000] printk: bootconsole [sifive0] enabled
> [ 0.000000] printk: debug: ignoring loglevel setting.
> [ 0.000000] initrd not found or empty - disabling initrd
> [ 0.000000] Zone ranges:
> [ 0.000000] DMA32 [mem 0x0000000080200000-0x00000000ffffffff]
> [ 0.000000] Normal [mem 0x0000000100000000-0x000000027fffffff]
> [ 0.000000] Movable zone start for each node
> [ 0.000000] Early memory node ranges
> [ 0.000000] node 0: [mem 0x0000000080200000-0x000000027fffffff]
> [ 0.000000] Initmem setup node 0 [mem 0x0000000080200000-0x000000027fffffff]
> [ 0.000000] On node 0 totalpages: 2096640
> [ 0.000000] DMA32 zone: 7161 pages used for memmap
> [ 0.000000] DMA32 zone: 0 pages reserved
> [ 0.000000] DMA32 zone: 523776 pages, LIFO batch:63
> [ 0.000000] Normal zone: 21504 pages used for memmap
> [ 0.000000] Normal zone: 1572864 pages, LIFO batch:63
> [ 0.000000] software IO TLB: mapped [mem 0xfbfff000-0xfffff000] (64MB)
> [ 0.000000] CPU with hartid=0 is not available
> [ 0.000000] CPU with hartid=0 is not available
> [ 0.000000] elf_hwcap is 0x112d
> [ 0.000000] percpu: Embedded 17 pages/cpu s30184 r8192 d31256 u69632
> [ 0.000000] pcpu-alloc: s30184 r8192 d31256 u69632 alloc=17*4096
> [ 0.000000] pcpu-alloc: [0] 0 [0] 1 [0] 2 [0] 3
> [ 0.000000] Built 1 zonelists, mobility grouping on. Total pages: 2067975
> [ 0.000000] Kernel command line: earlycon=sifive,0x10010000 console=ttySIF0,115200 ignore_loglevel debug root=/dev/ram0
> [ 0.000000] Dentry cache hash table entries: 1048576 (order: 11, 8388608 bytes)
> [ 0.000000] Inode-cache hash table entries: 524288 (order: 10, 4194304 bytes)
> [ 0.000000] Sorting __ex_table...
> [ 0.000000] Memory: 8178620K/8386560K available (5806K kernel code, 395K rwdata, 1851K rodata, 5853K init, 806K bss, 207940K reserved, 0K cma-reserved)
> [ 0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=4, Nodes=1
> [ 0.000000] rcu: Hierarchical RCU implementation.
> [ 0.000000] rcu: RCU restricting CPUs from NR_CPUS=8 to nr_cpu_ids=4.
> [ 0.000000] rcu: RCU calculated value of scheduler-enlistment delay is 25 jiffies.
> [ 0.000000] rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=4
> [ 0.000000] NR_IRQS: 0, nr_irqs: 0, preallocated irqs: 0
> [ 0.000000] plic: mapped 53 interrupts with 4 handlers for 9 contexts.
> [ 0.000000] riscv_timer_init_dt: Registering clocksource cpuid [0] hartid [3]
> [ 0.000000] clocksource: riscv_clocksource: mask: 0xffffffffffffffff max_cycles: 0x1d854df40, max_idle_ns: 3526361616960 ns
> [ 0.000006] sched_clock: 64 bits at 1000kHz, resolution 1000ns, wraps every 2199023255500ns
> [ 0.008456] Console: colour dummy device 80x25
> [ 0.012813] Calibrating delay loop (skipped), value calculated using timer frequency.. 2.00 BogoMIPS (lpj=4000)
> [ 0.022841] pid_max: default: 32768 minimum: 301
> [ 0.027939] Mount-cache hash table entries: 16384 (order: 5, 131072 bytes)
> [ 0.034634] Mountpoint-cache hash table entries: 16384 (order: 5, 131072 bytes)
> [ 0.042315] *** VALIDATE proc ***
> [ 0.045010] *** VALIDATE cgroup1 ***
> [ 0.048462] *** VALIDATE cgroup2 ***
> [ 0.053000] rcu: Hierarchical SRCU implementation.
> [ 0.057473] smp: Bringing up secondary CPUs ...
> [ 0.063256] smp: Brought up 1 node, 4 CPUs
> [ 0.068186] devtmpfs: initialized
> [ 0.072404] random: get_random_u32 called from bucket_table_alloc.isra.10+0x4e/0x15e with crng_init=0
> [ 0.081020] random: get_random_bytes called from setup_net+0x3a/0x1b8 with crng_init=0
> [ 0.088974] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 7645041785100000 ns
> [ 0.098480] futex hash table entries: 1024 (order: 4, 65536 bytes)
> [ 0.105299] NET: Registered protocol family 16
> [ 0.109683] random: get_random_bytes called from kcmp_cookies_init+0x1c/0x4a with crng_init=0
> [ 0.129984] vgaarb: loaded
> [ 0.132159] SCSI subsystem initialized
> [ 0.135927] libata version 3.00 loaded.
> [ 0.139630] usbcore: registered new interface driver usbfs
> [ 0.144998] usbcore: registered new interface driver hub
> [ 0.150360] usbcore: registered new device driver usb
> [ 0.156037] clocksource: Switched to clocksource riscv_clocksource
> [ 0.167530] NET: Registered protocol family 2
> [ 0.171747] tcp_listen_portaddr_hash hash table entries: 4096 (order: 5, 163840 bytes)
> [ 0.179576] TCP established hash table entries: 65536 (order: 7, 524288 bytes)
> [ 0.188249] TCP bind hash table entries: 65536 (order: 9, 2097152 bytes)
> [ 0.201277] TCP: Hash tables configured (established 65536 bind 65536)
> [ 0.207506] UDP hash table entries: 4096 (order: 6, 393216 bytes)
> [ 0.214439] UDP-Lite hash table entries: 4096 (order: 6, 393216 bytes)
> [ 0.221731] NET: Registered protocol family 1
> [ 0.225830] RPC: Registered named UNIX socket transport module.
> [ 0.231226] RPC: Registered udp transport module.
> [ 0.235906] RPC: Registered tcp transport module.
> [ 0.240593] RPC: Registered tcp NFSv4.1 backchannel transport module.
> [ 0.247018] PCI: CLS 0 bytes, default 64
> [ 0.665279] workingset: timestamp_bits=62 max_order=21 bucket_order=0
> [ 0.680212] NFS: Registering the id_resolver key type
> [ 0.684561] Key type id_resolver registered
> [ 0.688653] Key type id_legacy registered
> [ 0.692654] nfs4filelayout_init: NFSv4 File Layout Driver Registering...
> [ 0.699720] NET: Registered protocol family 38
> [ 0.703819] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 254)
> [ 0.711145] io scheduler mq-deadline registered
> [ 0.715653] io scheduler kyber registered
> [ 0.757094] Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled
> [ 0.763685] 10010000.serial: ttySIF0 at MMIO 0x10010000 (irq = 4, base_baud = 0) is a SiFive UART v0
> [ 0.772072] printk: console [ttySIF0] enabled
> [ 0.772072] printk: console [ttySIF0] enabled
> [ 0.780723] printk: bootconsole [sifive0] disabled
> [ 0.780723] printk: bootconsole [sifive0] disabled
> [ 0.790539] 10011000.serial: ttySIF1 at MMIO 0x10011000 (irq = 1, base_baud = 0) is a SiFive UART v0
> [ 0.799641] [drm] radeon kernel modesetting enabled.
> [ 0.813383] loop: module loaded
> [ 0.816227] libphy: Fixed MDIO Bus: probed
> [ 0.820345] e1000e: Intel(R) PRO/1000 Network Driver - 3.2.6-k
> [ 0.825645] e1000e: Copyright(c) 1999 - 2015 Intel Corporation.
> [ 0.831647] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
> [ 0.838065] ehci-pci: EHCI PCI platform driver
> [ 0.842520] ehci-platform: EHCI generic platform driver
> [ 0.847757] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
> [ 0.853865] ohci-pci: OHCI PCI platform driver
> [ 0.858329] ohci-platform: OHCI generic platform driver
> [ 0.863771] usbcore: registered new interface driver uas
> [ 0.868853] usbcore: registered new interface driver usb-storage
> [ 0.874961] mousedev: PS/2 mouse device common for all mice
> [ 0.880734] usbcore: registered new interface driver usbhid
> [ 0.885901] usbhid: USB HID core driver
> [ 0.890586] NET: Registered protocol family 10
> [ 0.895181] Segment Routing with IPv6
> [ 0.898160] sit: IPv6, IPv4 and MPLS over IPv4 tunneling driver
> [ 0.904576] NET: Registered protocol family 17
> [ 0.908487] Key type dns_resolver registered
> [ 0.913352] Warning: unable to open an initial console.
> [ 0.933780] Freeing unused kernel memory: 5852K
> [ 0.937543] This architecture does not have kernel memory protection.
> [ 0.943960] Run /init as init process
> [ 1.531025] random: dd: uninitialized urandom read (512 bytes read)
> [ 16.657284] random: dropbear: uninitialized urandom read (32 bytes read)
> [ 16.669210] _warn_unseeded_randomness: 11 callbacks suppressed
> [ 16.669230] random: get_random_bytes called from tcp_fastopen_init_key_once+0x40/0x58 with crng_init=0
> [ 16.686212] random: get_random_bytes called from load_elf_binary+0x7c0/0xca4 with crng_init=0
> Welcome to Buildroot
> buildroot login:
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--
Regards,
Atish