Message ID | 20221021163703.3218176-41-jthoughton@google.com (mailing list archive) |
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State | New |
Headers | show
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David Alan Gilbert" <dgilbert@redhat.com>, "Matthew Wilcox (Oracle)" <willy@infradead.org>, Vlastimil Babka <vbabka@suse.cz>, Baolin Wang <baolin.wang@linux.alibaba.com>, Miaohe Lin <linmiaohe@huawei.com>, Yang Shi <shy828301@gmail.com>, Andrew Morton <akpm@linux-foundation.org>, linux-mm@kvack.org, linux-kernel@vger.kernel.org, James Houghton <jthoughton@google.com> Content-Type: text/plain; charset="UTF-8" ARC-Authentication-Results: i=1; imf29.hostedemail.com; dkim=pass header.d=google.com header.s=20210112 header.b=hgVq1BGI; spf=pass (imf29.hostedemail.com: domain of 34cpSYwoKCOINXLSYKLXSRKSSKPI.GSQPMRYb-QQOZEGO.SVK@flex--jthoughton.bounces.google.com designates 209.85.128.202 as permitted sender) smtp.mailfrom=34cpSYwoKCOINXLSYKLXSRKSSKPI.GSQPMRYb-QQOZEGO.SVK@flex--jthoughton.bounces.google.com; dmarc=pass (policy=reject) header.from=google.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1666370274; a=rsa-sha256; cv=none; b=ZooM10NKbScMf7qODznbVpQh02F7pjDmiCnuZ+M18MxbZKRDZ64hvXuFai1WhP2jGo5/JE Iox/kQJYMjRQ2iYE+ZM/eac+SEBlMgPVFfaWAinPYfLr1jagmwy4ixM8seaHRiP5OmMD5b 5wFQCzcwfCWhqMhoyhgfJ/KmSrDZNCY= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1666370274; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=aZtBH3hoHoyLKHZRtw1whotmEhRsDJhNWbtzAg1Amnw=; b=ezsCR0RjY6q6w+IeyBQUNP8tdU5PtbRhRoKoRFfbxRmGt5z0ZzfkdgwGmmMzSDIwY1Rs/E px2nTLYrqHOZFAmZ3Ec4Ew2uRqfdu9WHEWlVt8ZtKMPXgzJ8y+T2cECfufINV2O9nRu+kX xmggBz5NTzsQQv0q6xYNhozRlJTMhCY= Authentication-Results: imf29.hostedemail.com; dkim=pass header.d=google.com header.s=20210112 header.b=hgVq1BGI; spf=pass (imf29.hostedemail.com: domain of 34cpSYwoKCOINXLSYKLXSRKSSKPI.GSQPMRYb-QQOZEGO.SVK@flex--jthoughton.bounces.google.com designates 209.85.128.202 as permitted sender) smtp.mailfrom=34cpSYwoKCOINXLSYKLXSRKSSKPI.GSQPMRYb-QQOZEGO.SVK@flex--jthoughton.bounces.google.com; dmarc=pass (policy=reject) header.from=google.com X-Rspam-User: X-Rspamd-Server: rspam10 X-Stat-Signature: xaeqftfdx7mkrs1poej4fc6qokocp6xf X-Rspamd-Queue-Id: BA3CA120019 X-HE-Tag: 1666370274-874330 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: <linux-mm.kvack.org> |
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hugetlb: introduce HugeTLB high-granularity mapping
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expand
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diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 6d1879ef933a..6d7103266e61 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -124,6 +124,7 @@ config X86 select ARCH_WANT_GENERAL_HUGETLB select ARCH_WANT_HUGE_PMD_SHARE select ARCH_WANT_HUGETLB_PAGE_OPTIMIZE_VMEMMAP if X86_64 + select ARCH_WANT_HUGETLB_HIGH_GRANULARITY_MAPPING select ARCH_WANT_LD_ORPHAN_WARN select ARCH_WANTS_THP_SWAP if X86_64 select ARCH_HAS_PARANOID_L1D_FLUSH
Now that HGM is fully supported for GENERAL_HUGETLB, x86 can enable it. The x86 KVM MMU already properly handles HugeTLB HGM pages (it does a page table walk to determine which size to use in the second-stage page table instead of, for example, checking vma_mmu_pagesize, like arm64 does). We could also enable HugeTLB HGM for arm (32-bit) at this point, as it also uses GENERAL_HUGETLB and I don't see anything else that is needed for it. However, I haven't tested on arm at all, so I won't enable it. Signed-off-by: James Houghton <jthoughton@google.com> --- arch/x86/Kconfig | 1 + 1 file changed, 1 insertion(+)