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platform: Allow platforms to specify the size of tlb fifo
For some platforms with a particularly high number of harts, if the tlb fifo is too small, it case harts to wait. Platforms should be allowed to specify the size of the tlb fifo. Signed-off-by: Xiang W <wxjstz@126.com> Signed-off-by: Xing Xiaoguang <xiaoguang.xing@sophgo.com> Reviewed-by: Anup Patel <anup@brainfault.org>
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cacfba32cc
5 changed files with 29 additions and 4 deletions
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@ -41,6 +41,7 @@
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#define SBI_PLATFORM_HART_INDEX2ID_OFFSET (0x60 + (__SIZEOF_POINTER__ * 2))
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#define SBI_PLATFORM_TLB_RANGE_FLUSH_LIMIT_DEFAULT (1UL << 12)
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#define SBI_PLATFORM_TLB_FIFO_NUM_ENTRIES 8
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#ifndef __ASSEMBLER__
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@ -125,6 +126,9 @@ struct sbi_platform_operations {
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/** Get tlb flush limit value **/
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u64 (*get_tlbr_flush_limit)(void);
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/** Get tlb fifo num entries*/
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u32 (*get_tlb_num_entries)(void);
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/** Initialize platform timer for current HART */
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int (*timer_init)(bool cold_boot);
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/** Exit platform timer for current HART */
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@ -325,6 +329,20 @@ static inline u64 sbi_platform_tlbr_flush_limit(const struct sbi_platform *plat)
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return SBI_PLATFORM_TLB_RANGE_FLUSH_LIMIT_DEFAULT;
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}
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/**
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* Get platform specific tlb fifo num entries.
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*
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* @param plat pointer to struct sbi_platform
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*
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* @return number of tlb fifo entries
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*/
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static inline u32 sbi_platform_tlb_fifo_num_entries(const struct sbi_platform *plat)
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{
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if (plat && sbi_platform_ops(plat)->get_tlb_num_entries)
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return sbi_platform_ops(plat)->get_tlb_num_entries();
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return SBI_PLATFORM_TLB_FIFO_NUM_ENTRIES;
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}
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/**
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* Get total number of HARTs supported by the platform
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*
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@ -20,8 +20,6 @@
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/* clang-format on */
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#define SBI_TLB_FIFO_NUM_ENTRIES 8
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struct sbi_scratch;
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struct sbi_tlb_info {
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@ -422,7 +422,7 @@ int sbi_tlb_init(struct sbi_scratch *scratch, bool cold_boot)
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return SBI_ENOMEM;
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}
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tlb_fifo_mem_off = sbi_scratch_alloc_offset(
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SBI_TLB_FIFO_NUM_ENTRIES * SBI_TLB_INFO_SIZE);
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sbi_platform_tlb_fifo_num_entries(plat) * SBI_TLB_INFO_SIZE);
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if (!tlb_fifo_mem_off) {
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sbi_scratch_free_offset(tlb_fifo_off);
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sbi_scratch_free_offset(tlb_sync_off);
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@ -453,7 +453,7 @@ int sbi_tlb_init(struct sbi_scratch *scratch, bool cold_boot)
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ATOMIC_INIT(tlb_sync, 0);
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sbi_fifo_init(tlb_q, tlb_mem,
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SBI_TLB_FIFO_NUM_ENTRIES, SBI_TLB_INFO_SIZE);
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sbi_platform_tlb_fifo_num_entries(plat), SBI_TLB_INFO_SIZE);
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return 0;
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}
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@ -18,6 +18,7 @@ struct platform_override {
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const struct fdt_match *match_table;
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u64 (*features)(const struct fdt_match *match);
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u64 (*tlbr_flush_limit)(const struct fdt_match *match);
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u32 (*tlb_num_entries)(const struct fdt_match *match);
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bool (*cold_boot_allowed)(u32 hartid, const struct fdt_match *match);
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int (*early_init)(bool cold_boot, const struct fdt_match *match);
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int (*final_init)(bool cold_boot, const struct fdt_match *match);
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@ -256,6 +256,13 @@ static u64 generic_tlbr_flush_limit(void)
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return SBI_PLATFORM_TLB_RANGE_FLUSH_LIMIT_DEFAULT;
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}
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static u32 generic_tlb_num_entries(void)
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{
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if (generic_plat && generic_plat->tlb_num_entries)
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return generic_plat->tlb_num_entries(generic_plat_match);
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return SBI_PLATFORM_TLB_FIFO_NUM_ENTRIES;
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}
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static int generic_pmu_init(void)
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{
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return fdt_pmu_setup(fdt_get_address());
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@ -308,6 +315,7 @@ const struct sbi_platform_operations platform_ops = {
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.pmu_init = generic_pmu_init,
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.pmu_xlate_to_mhpmevent = generic_pmu_xlate_to_mhpmevent,
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.get_tlbr_flush_limit = generic_tlbr_flush_limit,
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.get_tlb_num_entries = generic_tlb_num_entries,
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.timer_init = fdt_timer_init,
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.timer_exit = fdt_timer_exit,
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.vendor_ext_check = generic_vendor_ext_check,
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