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| author | Rick Chen <rick@andestech.com> | 2022-09-21 14:34:54 +0800 |
|---|---|---|
| committer | Leo Yu-Chi Liang <ycliang@andestech.com> | 2022-09-26 14:29:13 +0800 |
| commit | e0465f80bd33f239612ee9f0ee7b6cf13d2f5b4d (patch) | |
| tree | ddd81b0d82d1c0e8abf0b80853fdde07407bd5e6 /arch/riscv/lib | |
| parent | c2bdf02c9d40da7154fea46b7d10343fe9f14209 (diff) | |
| download | u-boot-e0465f80bd33f239612ee9f0ee7b6cf13d2f5b4d.zip u-boot-e0465f80bd33f239612ee9f0ee7b6cf13d2f5b4d.tar.gz u-boot-e0465f80bd33f239612ee9f0ee7b6cf13d2f5b4d.tar.bz2 | |
riscv: Introduce AVAILABLE_HARTS
In SMP all harts will register themself in available_hart
during start up. Then main hart will send IPI to other harts
according to this variables. But this mechanism may not
guarantee that all other harts can jump to next stage.
When main hart is sending IPI to other hart according to
available_harts, but other harts maybe still not finish the
registration. Then the SMP booting will miss some harts finally.
So let it become an option and it will be enabled by default.
Please refer to the discussion:
https://www.mail-archive.com/u-boot@lists.denx.de/msg449997.html
Signed-off-by: Rick Chen <rick@andestech.com>
Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>
Diffstat (limited to 'arch/riscv/lib')
| -rw-r--r-- | arch/riscv/lib/asm-offsets.c | 2 | ||||
| -rw-r--r-- | arch/riscv/lib/smp.c | 2 |
2 files changed, 4 insertions, 0 deletions
diff --git a/arch/riscv/lib/asm-offsets.c b/arch/riscv/lib/asm-offsets.c index c4f48c8..452dfce 100644 --- a/arch/riscv/lib/asm-offsets.c +++ b/arch/riscv/lib/asm-offsets.c @@ -17,8 +17,10 @@ int main(void) DEFINE(GD_BOOT_HART, offsetof(gd_t, arch.boot_hart)); DEFINE(GD_FIRMWARE_FDT_ADDR, offsetof(gd_t, arch.firmware_fdt_addr)); #if !CONFIG_IS_ENABLED(XIP) +#ifdef CONFIG_AVAILABLE_HARTS DEFINE(GD_AVAILABLE_HARTS, offsetof(gd_t, arch.available_harts)); #endif +#endif return 0; } diff --git a/arch/riscv/lib/smp.c b/arch/riscv/lib/smp.c index f8b7562..c0f65af 100644 --- a/arch/riscv/lib/smp.c +++ b/arch/riscv/lib/smp.c @@ -46,10 +46,12 @@ static int send_ipi_many(struct ipi_data *ipi, int wait) } #if !CONFIG_IS_ENABLED(XIP) +#ifdef CONFIG_AVAILABLE_HARTS /* skip if hart is not available */ if (!(gd->arch.available_harts & (1 << reg))) continue; #endif +#endif gd->arch.ipi[reg].addr = ipi->addr; gd->arch.ipi[reg].arg0 = ipi->arg0; |