From: "Edgecombe, Rick P" <rick.p.edgecombe@intel.com>
To: "linux-mm@kvack.org" <linux-mm@kvack.org>,
"peterx@redhat.com" <peterx@redhat.com>,
"Hansen, Dave" <dave.hansen@intel.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Cc: "hughd@google.com" <hughd@google.com>,
"willy@infradead.org" <willy@infradead.org>,
"dave.hansen@linux.intel.com" <dave.hansen@linux.intel.com>,
"vbabka@suse.cz" <vbabka@suse.cz>,
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"kirill@shutemov.name" <kirill@shutemov.name>,
"christophe.leroy@csgroup.eu" <christophe.leroy@csgroup.eu>,
"Jiang, Dave" <dave.jiang@intel.com>,
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"mgorman@techsingularity.net" <mgorman@techsingularity.net>,
"Huang, Ying" <ying.huang@intel.com>,
"x86@kernel.org" <x86@kernel.org>,
"Williams, Dan J" <dan.j.williams@intel.com>
Subject: Re: [PATCH 6/7] mm/x86: Add missing pud helpers
Date: Fri, 21 Jun 2024 19:36:30 +0000 [thread overview]
Message-ID: <db95c7abea9cd252a791d15359a4d940d91524e3.camel@intel.com> (raw)
In-Reply-To: <4fb4b087-cae2-4516-a34e-cb4c72be13eb@intel.com>
On Fri, 2024-06-21 at 07:51 -0700, Dave Hansen wrote:
>
> But, still, what if you take a Dirty=1,Write=1 pud and pud_modify() it
> to make it Dirty=1,Write=0? What prevents that from being
> misinterpreted by the hardware as being a valid 1G shadow stack mapping?
Hmm, it looks like we could use an arch_check_zapped_pud() that does a warning
like arch_check_zapped_pte/pmd() too. Not that we had no use for one before
this.
next prev parent reply other threads:[~2024-06-21 19:36 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-06-21 14:24 [PATCH 0/7] mm/mprotect: Fix dax puds Peter Xu
2024-06-21 14:24 ` [PATCH 1/7] mm/dax: Dump start address in fault handler Peter Xu
2024-06-21 14:24 ` [PATCH 2/7] mm/mprotect: Remove NUMA_HUGE_PTE_UPDATES Peter Xu
2024-06-21 14:25 ` [PATCH 3/7] mm/mprotect: Push mmu notifier to PUDs Peter Xu
2024-06-21 14:25 ` [PATCH 4/7] mm/powerpc: Add missing pud helpers Peter Xu
2024-06-21 15:01 ` Peter Xu
2024-06-21 14:25 ` [PATCH 5/7] mm/x86: Make pud_leaf() only cares about PSE bit Peter Xu
2024-06-21 14:32 ` Dave Hansen
2024-06-21 14:25 ` [PATCH 6/7] mm/x86: Add missing pud helpers Peter Xu
2024-06-21 14:51 ` Dave Hansen
2024-06-21 15:45 ` Peter Xu
2024-06-21 16:11 ` Dave Hansen
2024-06-23 15:42 ` Peter Xu
2024-06-21 19:36 ` Edgecombe, Rick P [this message]
2024-06-21 20:27 ` Peter Xu
2024-06-21 22:06 ` Edgecombe, Rick P
2024-06-21 14:25 ` [PATCH 7/7] mm/mprotect: fix dax pud handlings Peter Xu
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