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RISC-V: Use Linux logical CPU number instead of hartid

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Setup the cpu_logical_map during boot. Moreover, every SBI call
and PLIC context are based on the physical hartid. Use the logical
CPU to hartid mapping to pass correct hartid to respective functions.

Signed-off-by: Atish Patra <atish.patra@wdc.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
This commit is contained in:
Atish Patra 2018-10-02 12:15:05 -07:00 • committed by Palmer Dabbelt
parent 6825c7a80f
commit f99fb607fb
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GPG key ID: EF4CA1502CCBAB41
8 changed files with 71 additions and 32 deletions
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24
arch/riscv/kernel/smp.c
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@ -97,14 +97,18 @@ void riscv_software_interrupt(void)
static void
send_ipi_message(const struct cpumask *to_whom, enum ipi_message_type operation)
{
int i;
int cpuid, hartid;
struct cpumask hartid_mask;
cpumask_clear(&hartid_mask);
mb();
for_each_cpu(i, to_whom)
set_bit(operation, &ipi_data[i].bits);
for_each_cpu(cpuid, to_whom) {
set_bit(operation, &ipi_data[cpuid].bits);
hartid = cpuid_to_hartid_map(cpuid);
cpumask_set_cpu(hartid, &hartid_mask);
}
mb();
sbi_send_ipi(cpumask_bits(to_whom));
sbi_send_ipi(cpumask_bits(&hartid_mask));
}
void arch_send_call_function_ipi_mask(struct cpumask *mask)
@ -146,7 +150,7 @@ void smp_send_reschedule(int cpu)
void flush_icache_mm(struct mm_struct *mm, bool local)
{
unsigned int cpu;
cpumask_t others, *mask;
cpumask_t others, hmask, *mask;
preempt_disable();
@ -164,9 +168,11 @@ void flush_icache_mm(struct mm_struct *mm, bool local)
*/
cpumask_andnot(&others, mm_cpumask(mm), cpumask_of(cpu));
local |= cpumask_empty(&others);
if (mm != current->active_mm || !local)
sbi_remote_fence_i(others.bits);
else {
if (mm != current->active_mm || !local) {
cpumask_clear(&hmask);
riscv_cpuid_to_hartid_mask(&others, &hmask);
sbi_remote_fence_i(hmask.bits);
} else {
/*
* It's assumed that at least one strongly ordered operation is
* performed on this hart between setting a hart's cpumask bit