Anup Patel e435ba0524 lib: sbi_init: Avoid thundering hurd problem with coldboot_lock ...

We can have thundering hurd problem with coldboot_lock where the
boot HART can potentially starve trying to acquire coldboot_lock
because some of the non-boot HARTs are continuously acquiring and
releasing coldboot_lock. This can happen if MIP.MSIP bit is already
set for some of the non-boot HARTs.

To avoid thundering hurd problem for coldboot_lock, we use the
__smp_load_acquire() and __smp_store_release() for coldboot_done
flag and use coldboot_lock only for coldboot_wait_hmask.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Tested-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
Reviewed-by: Bin Meng <bin.meng@windriver.com>

2020-08-21 19:35:28 +05:30

..

objects.mk

lib: Add platform features in boot time print

2020-05-10 10:24:08 +05:30

riscv_asm.c

lib: sbi: Fix 32/64 bits variable compatibility

2020-06-20 08:47:11 +05:30

riscv_atomic.c

include: Use more consistent name for atomic xchg() and cmpxchg()

2020-03-28 13:32:38 +05:30

riscv_hardfp.S

lib: Move sbi core library to lib/sbi

2019-06-19 09:48:51 +05:30

riscv_locks.c

lib: Move sbi core library to lib/sbi

2019-06-19 09:48:51 +05:30

sbi_bitmap.c

lib: Simple bitmap library

2020-03-11 15:29:45 +05:30

sbi_bitops.c

lib: sbi: Fix coding style issues

2020-03-10 10:27:28 +05:30

sbi_console.c

include: sbi_console: Remove scratch parameter from sbi_dprintf()

2020-03-28 13:32:58 +05:30

sbi_ecall_base.c

lib: Allow overriding SBI implementation ID

2020-04-19 17:00:05 +05:30

sbi_ecall_hsm.c

lib: sbi_ecall: Remove mcause, scratch and hartid parameters

2020-03-28 13:32:20 +05:30

sbi_ecall_legacy.c

lib: sbi_tlb: Fix remote TLB HFENCE VVMA implementation

2020-05-07 08:55:38 +05:30

sbi_ecall_replace.c

lib: sbi_tlb: Fix remote TLB HFENCE VVMA implementation

2020-05-07 08:55:38 +05:30

sbi_ecall_vendor.c

lib: sbi_ecall: Remove mcause, scratch and hartid parameters

2020-03-28 13:32:20 +05:30

sbi_ecall.c

lib: Don't return any invalid error from SBI ecall

2020-06-20 10:36:13 +05:30

sbi_emulate_csr.c

include: sbi_console: Remove scratch parameter from sbi_dprintf()

2020-03-28 13:32:58 +05:30

sbi_expected_trap.S

lib: Rename unprivileged trap handler

2020-05-10 09:59:16 +05:30

sbi_fifo.c

lib: Fix race conditions in tlb fifo access.

2019-08-16 08:42:55 +05:30

sbi_hart.c

lib: Don't return any invalid error from SBI ecall

2020-06-20 10:36:13 +05:30

sbi_hfence.S

lib: Fix __sbi_hfence_gvma_vmid_gpa() and __sbi_hfence_vvma_asid_va()

2020-06-15 09:24:27 +05:30

sbi_hsm.c

lib: Don't return any invalid error from SBI ecall

2020-06-20 10:36:13 +05:30

sbi_illegal_insn.c

lib: Add RISC-V hypervisor v0.6.1 support

2020-06-08 15:41:23 +05:30

sbi_init.c

lib: sbi_init: Avoid thundering hurd problem with coldboot_lock

2020-08-21 19:35:28 +05:30

sbi_ipi.c

include: sbi_ipi: Remove scratch parameter from most functions

2020-03-28 13:32:47 +05:30

sbi_math.c

lib: Create a separate math helper function file

2020-05-10 09:59:24 +05:30

sbi_misaligned_ldst.c

lib: sbi_misaligned_ldst: Determine transformed instruction length correctly

2020-08-04 08:48:41 +05:30

sbi_platform.c

lib: sbi: Improve get_feature_str() implementation and usage

2020-05-19 09:19:34 +05:30

sbi_scratch.c

lib: sbi_scratch: Introduce sbi_scratch_last_hartid() API

2020-03-28 13:32:41 +05:30

sbi_string.c

lib: Add sbi_strncmp implementation

2020-07-29 12:03:45 +05:30

sbi_system.c

include: sbi_platform: Combine reboot and shutdown into one callback

2020-04-27 14:35:29 +05:30

sbi_timer.c

include: sbi: Use scratch pointer as parmeter in HART feature APIs

2020-05-19 09:19:42 +05:30

sbi_tlb.c

lib: Fix __sbi_hfence_gvma_vmid_gpa() and __sbi_hfence_vvma_asid_va()

2020-06-15 09:24:27 +05:30

sbi_trap.c

lib: sbi_trap: Fix hstatus.SPVP update in sbi_trap_redirect()

2020-08-17 18:17:42 +05:30

sbi_unpriv.c

lib: Optimize inline assembly for unprivilege access functions

2020-05-16 17:52:42 +05:30