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Re: [PATCH v2 02/54] accel/tcg: Split out tlbfast_flush_locked


From: Pierrick Bouvier
Subject: Re: [PATCH v2 02/54] accel/tcg: Split out tlbfast_flush_locked
Date: Thu, 14 Nov 2024 09:52:06 -0800
User-agent: Mozilla Thunderbird



On 11/14/24 08:00, Richard Henderson wrote:
We will have a need to flush only the "fast" portion
of the tlb, allowing re-fill from the "full" portion.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
  accel/tcg/cputlb.c | 9 +++++++--
  1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/accel/tcg/cputlb.c b/accel/tcg/cputlb.c
index b76a4eac4e..c1838412e8 100644
--- a/accel/tcg/cputlb.c
+++ b/accel/tcg/cputlb.c
@@ -284,13 +284,18 @@ static void tlb_mmu_resize_locked(CPUTLBDesc *desc, 
CPUTLBDescFast *fast,
      }
  }
-static void tlb_mmu_flush_locked(CPUTLBDesc *desc, CPUTLBDescFast *fast)
+static void tlbfast_flush_locked(CPUTLBDesc *desc, CPUTLBDescFast *fast)
  {
      desc->n_used_entries = 0;
+    memset(fast->table, -1, sizeof_tlb(fast));
+}
+
+static void tlb_mmu_flush_locked(CPUTLBDesc *desc, CPUTLBDescFast *fast)
+{
+    tlbfast_flush_locked(desc, fast);
      desc->large_page_addr = -1;
      desc->large_page_mask = -1;
      desc->vindex = 0;
-    memset(fast->table, -1, sizeof_tlb(fast));
      memset(desc->vtable, -1, sizeof(desc->vtable));
  }

Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>




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