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x86/mm: Add INVLPGB feature and Kconfig entry

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In addition, the CPU advertises the maximum number of pages that can be
shot down with one INVLPGB instruction in CPUID. Save that information
for later use.

  [ bp: use cpu_has(), typos, massage. ]

Signed-off-by: Rik van Riel <riel@surriel.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20250226030129.530345-3-riel@surriel.com
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Rik van Riel 2025-03-19 11:08:26 +01:00 • committed by Ingo Molnar
commit 767ae437a3
5 changed files with 21 additions and 1 deletions
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