29 lines
1.1 KiB
Diff
29 lines
1.1 KiB
Diff
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From 2fc0be5fbcee1a62162b699451bb94f90ec64244 Mon Sep 17 00:00:00 2001
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From: Rik van Riel <riel@surriel.com>
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Date: Mon, 30 Dec 2024 12:53:13 -0500
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Subject: x86/mm: only invalidate final translations with INVLPGB
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Use the INVLPGB_FINAL_ONLY flag when invalidating mappings with INVPLGB.
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This way only leaf mappings get removed from the TLB, leaving intermediate
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translations cached.
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On the (rare) occasions where we free page tables we do a full flush,
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ensuring intermediate translations get flushed from the TLB.
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Signed-off-by: Rik van Riel <riel@surriel.com>
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---
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arch/x86/include/asm/invlpgb.h | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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--- a/arch/x86/include/asm/invlpgb.h
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+++ b/arch/x86/include/asm/invlpgb.h
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@@ -51,7 +51,7 @@ static inline void invlpgb_flush_user(un
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static inline void invlpgb_flush_user_nr(unsigned long pcid, unsigned long addr,
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int nr, bool pmd_stride)
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{
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- __invlpgb(0, pcid, addr, nr - 1, pmd_stride, INVLPGB_PCID | INVLPGB_VA);
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+ __invlpgb(0, pcid, addr, nr - 1, pmd_stride, INVLPGB_PCID | INVLPGB_VA | INVLPGB_FINAL_ONLY);
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}
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/* Flush all mappings for a given ASID, not including globals. */
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