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Peter Anvin" , Andy Lutomirski , Peter Zijlstra , Ning Sun , x86@kernel.org, tboot-devel@lists.sourceforge.net, Ard Biesheuvel , Ilias Apalodimas , linux-efi@vger.kernel.org, Vishal Moola , Alistair Popple , "Matthew Wilcox (Oracle)" , linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org X-Mailer: b4 0.15.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1784037902; l=1553; i=kevin.brodsky@arm.com; s=20260427; h=from:subject:message-id; bh=VrWlMtHqgM/vx22jiN3vYsU+W1Lh9jxCM8/DJ3H1HHw=; b=m8zZWjxysI7gu08ZC5WjroF8ppS2XmCi+NSg9AchPnK6c6wz3EcnLIwt4UrkZ1Tknhd8Uq+lO humwu8pswzNB3IZSFZsQqWeKm+RG8SsPRg6CN1eLU7ZKufXomLaUKal X-Developer-Key: i=kevin.brodsky@arm.com; a=ed25519; pk=N2QG+eJKrvkNovwhhwJhnJ4+ScVfsGCHldmqLfcMTFs= X-Rspam-User: X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: D564B18000E X-Stat-Signature: squmazf8f3iwisnx5ig8733iec34hjkm X-HE-Tag: 1784038057-152977 X-HE-Meta: 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 uxO49gTl +qGFGRxqOh0b+g+kbrioU2Us6Y2aSUN3MzQY3ON+eCiApcCpeuLpBHgN0aqx6sfu9nyoG9WlvHIqwsBdUxDaN74qbuDHlA3uxT/PxGsgC6cMYxP9OBrzD7o3rDrrBgLO4pfQOCYphIjviYq9ySwEIxXOgo/Da7zYBQSYNp/vQ1/PnP46nKNsmhCNSyHQa3dkBP142mAuk8CWS0PErDIMWmm2QyZTiaDT0Pr6np6TPdu2rlJsHG0AA9hMXeK6O30e0PvlgkmxhRCvW3zlSXZ4uu3ww/Rixu6e/7+53J64FUfKyJLpfgf+eiDsFvE7m2yP+O33wgH4yY+4UuDW0QK2/6b4zjE6MAq5Ky3JhaCRq5E+d3r+mtnegG3TeBA== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: tboot_mm is a kernel-owned address space used to build the identity map for tboot shutdown. Mark it with MMF_KERNEL so page table allocation and initialisation code treats its page tables as kernel page tables. Having marked tboot_mm as a kernel mm, we also need to convert pte_alloc_map() (user PTE) to pte_alloc_kernel() (kernel PTE), and drop the matching pte_unmap(). Assisted-by: Codex:GPT-5.5 Signed-off-by: Kevin Brodsky --- arch/x86/kernel/tboot.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/x86/kernel/tboot.c b/arch/x86/kernel/tboot.c index 46b8f1f16676..08c899f88e41 100644 --- a/arch/x86/kernel/tboot.c +++ b/arch/x86/kernel/tboot.c @@ -99,6 +99,7 @@ static struct mm_struct tboot_mm = { .pgd = swapper_pg_dir, .mm_users = ATOMIC_INIT(2), .mm_count = ATOMIC_INIT(1), + .flags = MM_FLAGS_INIT(MMF_KERNEL_MASK), .write_protect_seq = SEQCNT_ZERO(tboot_mm.write_protect_seq), MMAP_LOCK_INITIALIZER(init_mm) .page_table_lock = __SPIN_LOCK_UNLOCKED(init_mm.page_table_lock), @@ -129,11 +130,10 @@ static int map_tboot_page(unsigned long vaddr, unsigned long pfn, pmd = pmd_alloc(&tboot_mm, pud, vaddr); if (!pmd) return -1; - pte = pte_alloc_map(&tboot_mm, pmd, vaddr); + pte = pte_alloc_kernel(pmd, vaddr); if (!pte) return -1; set_pte_at(&tboot_mm, vaddr, pte, pfn_pte(pfn, prot)); - pte_unmap(pte); /* * PTI poisons low addresses in the kernel page tables in the -- 2.51.2