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// SPDX-License-Identifier: GPL-2.0
#include <linux/mm.h>
#include <linux/smp.h>
#include <linux/sched.h>
#include <asm/sbi.h>
#include <asm/mmu_context.h>
static inline void local_flush_tlb_all_asid(unsigned long asid)
{
__asm__ __volatile__ ("sfence.vma x0, %0"
:
: "r" (asid)
: "memory");
}
static inline void local_flush_tlb_page_asid(unsigned long addr,
unsigned long asid)
{
__asm__ __volatile__ ("sfence.vma %0, %1"
:
: "r" (addr), "r" (asid)
: "memory");
}
void flush_tlb_all(void)
{
sbi_remote_sfence_vma(NULL, 0, -1);
}
static void __sbi_tlb_flush_range(struct mm_struct *mm, unsigned long start,
unsigned long size, unsigned long stride)
{
struct cpumask *cmask = mm_cpumask(mm);
struct cpumask hmask;
unsigned int cpuid;
bool broadcast;
if (cpumask_empty(cmask))
return;
cpuid = get_cpu();
/* check if the tlbflush needs to be sent to other CPUs */
broadcast = cpumask_any_but(cmask, cpuid) < nr_cpu_ids;
if (static_branch_unlikely(&use_asid_allocator)) {
unsigned long asid = atomic_long_read(&mm->context.id);
if (broadcast) {
riscv_cpuid_to_hartid_mask(cmask, &hmask);
sbi_remote_sfence_vma_asid(cpumask_bits(&hmask),
start, size, asid);
} else if (size <= stride) {
local_flush_tlb_page_asid(start, asid);
} else {
local_flush_tlb_all_asid(asid);
}
} else {
if (broadcast) {
riscv_cpuid_to_hartid_mask(cmask, &hmask);
sbi_remote_sfence_vma(cpumask_bits(&hmask),
start, size);
} else if (size <= stride) {
local_flush_tlb_page(start);
} else {
local_flush_tlb_all();
}
}
put_cpu();
}
void flush_tlb_mm(struct mm_struct *mm)
{
__sbi_tlb_flush_range(mm, 0, -1, PAGE_SIZE);
}
void flush_tlb_page(struct vm_area_struct *vma, unsigned long addr)
{
__sbi_tlb_flush_range(vma->vm_mm, addr, PAGE_SIZE, PAGE_SIZE);
}
void flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
unsigned long end)
{
__sbi_tlb_flush_range(vma->vm_mm, start, end - start, PAGE_SIZE);
}
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
void flush_pmd_tlb_range(struct vm_area_struct *vma, unsigned long start,
unsigned long end)
{
__sbi_tlb_flush_range(vma->vm_mm, start, end - start, PMD_SIZE);
}
#endif
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