[PATCH v3 08/12] target/loongarch: Use loongarch_tlb_search_cb in helper_invtlb_page_asid_or_g

Bibo Mao posted 12 patches 3 days, 5 hours ago
Maintainers: Song Gao <gaosong@loongson.cn>
There is a newer version of this series
[PATCH v3 08/12] target/loongarch: Use loongarch_tlb_search_cb in helper_invtlb_page_asid_or_g
Posted by Bibo Mao 3 days, 5 hours ago
With function helper_invtlb_page_asid_or_g(), currently it is to
search TLB entry one by one. Instead STLB can be searched at first
with hash method, and then search MTLB with one by one method.

Here common API loongarch_tlb_search_cb() is used in function
helper_invtlb_page_asid_or_g().

Signed-off-by: Bibo Mao <maobibo@loongson.cn>
---
 target/loongarch/tcg/tlb_helper.c | 33 +++++++++++--------------------
 1 file changed, 11 insertions(+), 22 deletions(-)

diff --git a/target/loongarch/tcg/tlb_helper.c b/target/loongarch/tcg/tlb_helper.c
index fc853f6e80..620de85a3a 100644
--- a/target/loongarch/tcg/tlb_helper.c
+++ b/target/loongarch/tcg/tlb_helper.c
@@ -561,30 +561,19 @@ void helper_invtlb_page_asid(CPULoongArchState *env, target_ulong info,
 void helper_invtlb_page_asid_or_g(CPULoongArchState *env,
                                   target_ulong info, target_ulong addr)
 {
-    uint16_t asid = info & 0x3ff;
-
-    for (int i = 0; i < LOONGARCH_TLB_MAX; i++) {
-        LoongArchTLB *tlb = &env->tlb[i];
-        uint8_t tlb_g = FIELD_EX64(tlb->tlb_entry0, TLBENTRY, G);
-        uint16_t tlb_asid = FIELD_EX64(tlb->tlb_misc, TLB_MISC, ASID);
-        uint64_t vpn, tlb_vppn;
-        uint8_t tlb_ps, compare_shift;
-        uint8_t tlb_e = FIELD_EX64(tlb->tlb_misc, TLB_MISC, E);
-
-        if (!tlb_e) {
-            continue;
-        }
-
-        tlb_ps = FIELD_EX64(tlb->tlb_misc, TLB_MISC, PS);
-        tlb_vppn = FIELD_EX64(tlb->tlb_misc, TLB_MISC, VPPN);
-        vpn = (addr & TARGET_VIRT_MASK) >> (tlb_ps + 1);
-        compare_shift = tlb_ps + 1 - R_TLB_MISC_VPPN_SHIFT;
+    int index, asid = info & 0x3ff;
+    LoongArchTLB *tlb;
+    tlb_match func;
+    bool ret;
 
-        if ((tlb_g || (tlb_asid == asid)) &&
-            (vpn == (tlb_vppn >> compare_shift))) {
-            tlb->tlb_misc = FIELD_DP64(tlb->tlb_misc, TLB_MISC, E, 0);
-        }
+    func = tlb_match_any;
+    ret = loongarch_tlb_search_cb(env, addr, &index, asid, func);
+    if (!ret) {
+        return;
     }
+
+    tlb = &env->tlb[index];
+    tlb->tlb_misc = FIELD_DP64(tlb->tlb_misc, TLB_MISC, E, 0);
     tlb_flush(env_cpu(env));
 }
 
-- 
2.39.3
Re: [PATCH v3 08/12] target/loongarch: Use loongarch_tlb_search_cb in helper_invtlb_page_asid_or_g
Posted by Richard Henderson 3 days, 1 hour ago
On 9/3/25 10:48, Bibo Mao wrote:
> +    ret = loongarch_tlb_search_cb(env, addr, &index, asid, func);
> +    if (!ret) {
> +        return;
>       }
> +
> +    tlb = &env->tlb[index];

Perhaps it would be better to have loongarch_tlb_search_cb return the LoongArchTLB 
pointer, or NULL for no match.

Anyway,
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>


r~
Re: [PATCH v3 08/12] target/loongarch: Use loongarch_tlb_search_cb in helper_invtlb_page_asid_or_g
Posted by Bibo Mao 2 days, 5 hours ago

On 2025/9/3 下午9:20, Richard Henderson wrote:
> On 9/3/25 10:48, Bibo Mao wrote:
>> +    ret = loongarch_tlb_search_cb(env, addr, &index, asid, func);
>> +    if (!ret) {
>> +        return;
>>       }
>> +
>> +    tlb = &env->tlb[index];
> 
> Perhaps it would be better to have loongarch_tlb_search_cb return the 
> LoongArchTLB pointer, or NULL for no match.
Sure, will add separate patch to have loongarch_tlb_search_cb return the
LoongArchTLB pointer.

Regards
Bibo Mao
> 
> Anyway,
> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
> 
> 
> r~