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X-CSE-ConnectionGUID: KejqUlCTS32l+BREJidaVQ== X-CSE-MsgGUID: iFHUvHV2Qfi1I44jc4dA0A== X-IronPort-AV: E=McAfee;i="6800,10657,11557"; a="63235850" X-IronPort-AV: E=Sophos;i="6.18,277,1751266800"; d="scan'208";a="63235850" Received: from orviesa005.jf.intel.com ([10.64.159.145]) by fmvoesa107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 Sep 2025 22:43:13 -0700 X-CSE-ConnectionGUID: AnSarqLJRvCAo0XtC3fUqA== X-CSE-MsgGUID: pmp2LUxXQ/WqgCkFl7wFLg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.18,277,1751266800"; d="scan'208";a="180858828" Received: from allen-box.sh.intel.com ([10.239.159.52]) by orviesa005.jf.intel.com with ESMTP; 18 Sep 2025 22:43:07 -0700 From: Lu Baolu To: Joerg Roedel , Will Deacon , Robin Murphy , Kevin Tian , Jason Gunthorpe , Jann Horn , Vasant Hegde , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , Alistair Popple , Peter Zijlstra , Uladzislau Rezki , Jean-Philippe Brucker , Andy Lutomirski , Yi Lai Cc: iommu@lists.linux.dev, security@kernel.org, x86@kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Dave Hansen , Lu Baolu Subject: [PATCH v5 7/8] mm: Hook up Kconfig options for async page table freeing Date: Fri, 19 Sep 2025 13:40:05 +0800 Message-ID: <20250919054007.472493-8-baolu.lu@linux.intel.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250919054007.472493-1-baolu.lu@linux.intel.com> References: <20250919054007.472493-1-baolu.lu@linux.intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 3EFA2100005 X-Rspamd-Server: rspam05 X-Stat-Signature: 9yx6tw15qnzhtwicfyz6g99d8zksxfo4 X-Rspam-User: X-HE-Tag: 1758260593-143241 X-HE-Meta: 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 YrPt1DJh PZk8yhXLTpG/tvHzOFIPy5iMTxSk2VTpMJTuSdjGJya8Yp4fdfGYMa+z4kUpAFfMqQ9QExavPD3PFGifrjKoqsdLFYm6W/8oW5Zvyyf+ryiNoq1I9CvGgV3soCFAvlNFGrGnwdnxOwknYCZCHajMABQDtPJaFKmw1f2ziSQ7D7o+k14f1dZtqON+UTw== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: From: Dave Hansen The CONFIG_ASYNC_PGTABLE_FREE option controls whether an architecture requires asynchronous page table freeing. On x86, this is selected if IOMMU_SVA is enabled, because both Intel and AMD IOMMU architectures could potentially cache kernel page table entries in their paging structure cache, regardless of the permission. Signed-off-by: Dave Hansen Signed-off-by: Lu Baolu Reviewed-by: Jason Gunthorpe Reviewed-by: Kevin Tian --- arch/x86/Kconfig | 1 + mm/Kconfig | 3 +++ 2 files changed, 4 insertions(+) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 52c8910ba2ef..247caac65e22 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -281,6 +281,7 @@ config X86 select HAVE_PCI select HAVE_PERF_REGS select HAVE_PERF_USER_STACK_DUMP + select ASYNC_PGTABLE_FREE if IOMMU_SVA select MMU_GATHER_RCU_TABLE_FREE select MMU_GATHER_MERGE_VMAS select HAVE_POSIX_CPU_TIMERS_TASK_WORK diff --git a/mm/Kconfig b/mm/Kconfig index e443fe8cd6cf..1576409cec03 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -920,6 +920,9 @@ config PAGE_MAPCOUNT config PGTABLE_HAS_HUGE_LEAVES def_bool TRANSPARENT_HUGEPAGE || HUGETLB_PAGE +config ASYNC_PGTABLE_FREE + def_bool n + # TODO: Allow to be enabled without THP config ARCH_SUPPORTS_HUGE_PFNMAP def_bool n -- 2.43.0