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Flush TLBs on ADUE change #406

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aswaterman wants to merge 2 commits into from
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Flush TLBs on ADUE change #406

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8d5ef43
Expose tlb_flush_all function
aswaterman Nov 19, 2025
799e51c
Flush TLBs on ADUE change
aswaterman Nov 19, 2025
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2 changes: 2 additions & 0 deletions include/sbi/sbi_tlb.h
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Original file line number Diff line number Diff line change
Expand Up @@ -58,4 +58,6 @@ int sbi_tlb_request(ulong hmask, ulong hbase, struct sbi_tlb_info *tinfo);

int sbi_tlb_init(struct sbi_scratch *scratch, bool cold_boot);

void __tlb_flush_all(void);

#endif
13 changes: 12 additions & 1 deletion lib/sbi/sbi_fwft.c
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Expand Up @@ -13,8 +13,10 @@
#include <sbi/sbi_error.h>
#include <sbi/sbi_hart.h>
#include <sbi/sbi_heap.h>
#include <sbi/sbi_hfence.h>
#include <sbi/sbi_scratch.h>
#include <sbi/sbi_string.h>
#include <sbi/sbi_tlb.h>
#include <sbi/sbi_types.h>

#include <sbi/riscv_asm.h>
Expand Down Expand Up @@ -167,7 +169,16 @@ static int fwft_adue_supported(struct fwft_config *conf)

static int fwft_set_adue(struct fwft_config *conf, unsigned long value)
{
return fwft_menvcfg_set_bit(value, ENVCFG_ADUE_SHIFT);
int res = fwft_menvcfg_set_bit(value, ENVCFG_ADUE_SHIFT);

if (res == SBI_OK) {
__asm__ __volatile__("sfence.vma");

if (misa_extension('H'))
__sbi_hfence_gvma_all();
}

return res;
}

static int fwft_get_adue(struct fwft_config *conf, unsigned long *value)
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4 changes: 2 additions & 2 deletions lib/sbi/sbi_tlb.c
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Expand Up @@ -29,7 +29,7 @@ static unsigned long tlb_fifo_off;
static unsigned long tlb_fifo_mem_off;
static unsigned long tlb_range_flush_limit;

static void tlb_flush_all(void)
void __tlb_flush_all(void)
{
__asm__ __volatile("sfence.vma");
}
Expand Down Expand Up @@ -86,7 +86,7 @@ static void sbi_tlb_local_sfence_vma(struct sbi_tlb_info *tinfo)
sbi_pmu_ctr_incr_fw(SBI_PMU_FW_SFENCE_VMA_RCVD);

if ((start == 0 && size == 0) || (size == SBI_TLB_FLUSH_ALL)) {
tlb_flush_all();
__tlb_flush_all();
return;
}

Expand Down