linux-kernel - Re: [PATCH v2 2/2] arm64: mm: implement vmemmap_check

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <Z2W5Bs0bZANI6NKv@arm.com>
Date: Fri, 20 Dec 2024 18:35:50 +0000
From: Catalin Marinas <catalin.marinas@....com>
To: Zhenhua Huang <quic_zhenhuah@...cinc.com>
Cc: will@...nel.org, ardb@...nel.org, ryan.roberts@....com,
	mark.rutland@....com, joey.gouly@....com,
	dave.hansen@...ux.intel.com, akpm@...ux-foundation.org,
	chenfeiyang@...ngson.cn, chenhuacai@...nel.org, linux-mm@...ck.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/2] arm64: mm: implement vmemmap_check_pmd for arm64

On Mon, Dec 09, 2024 at 05:42:27PM +0800, Zhenhua Huang wrote:
> vmemmap_check_pmd() is used to determine if needs to populate to base
> pages. Implement it for arm64 arch.
> 
> Fixes: 2045a3b8911b ("mm/sparse-vmemmap: generalise vmemmap_populate_hugepages()")
> Signed-off-by: Zhenhua Huang <quic_zhenhuah@...cinc.com>
> ---
>  arch/arm64/mm/mmu.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c
> index fd59ee44960e..41c7978a92be 100644
> --- a/arch/arm64/mm/mmu.c
> +++ b/arch/arm64/mm/mmu.c
> @@ -1169,7 +1169,8 @@ int __meminit vmemmap_check_pmd(pmd_t *pmdp, int node,
>  				unsigned long addr, unsigned long next)
>  {
>  	vmemmap_verify((pte_t *)pmdp, node, addr, next);
> -	return 1;
> +
> +	return pmd_sect(*pmdp);
>  }
>  
>  int __meminit vmemmap_populate(unsigned long start, unsigned long end, int node,

Don't we need this patch only if we implement the first one? Please fold
it into the other patch.

-- 
Catalin