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Wed, 09 Jul 2025 01:11:29 -0700 (PDT) Date: Wed, 9 Jul 2025 10:08:54 +0200 In-Reply-To: <20250709080840.2233208-26-ardb+git@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250709080840.2233208-26-ardb+git@google.com> X-Developer-Key: i=ardb@kernel.org; a=openpgp; fpr=F43D03328115A198C90016883D200E9CA6329909 X-Developer-Signature: v=1; a=openpgp-sha256; l=1051; i=ardb@kernel.org; h=from:subject; bh=/aZ0V2A8zhGGvGqcdFjf+IBZLj2TZ6Tesp02RBGOQMc=; b=owGbwMvMwCVmkMcZplerG8N4Wi2JISNP+ewksbCNoclTNQ+fOvXZTM6qdrb3jR4Rkz1MdzxSA yyvpR7uKGVhEONikBVTZBGY/ffdztMTpWqdZ8nCzGFlAhnCwMUpABNxfMHwT3OFZuF//1O1Emsb s+V3MGeFJoSxHCzbeG3tB84Er/tmLxn+V2jdENFO4+Zij3c84F++xsm5TORQc47ulPh1bB0OjWs YAQ== X-Mailer: git-send-email 2.50.0.727.gbf7dc18ff4-goog Message-ID: <20250709080840.2233208-39-ardb+git@google.com> Subject: [PATCH v4 13/24] x86/boot: Provide PIC aliases for 5-level paging related constants From: Ard Biesheuvel To: linux-kernel@vger.kernel.org Cc: linux-efi@vger.kernel.org, x86@kernel.org, Ard Biesheuvel , Borislav Petkov , Ingo Molnar , Dionna Amalie Glaze , Kevin Loughlin , Tom Lendacky , Josh Poimboeuf , Peter Zijlstra Content-Type: text/plain; charset="UTF-8" From: Ard Biesheuvel Provide PIC aliases for the global variables related to 5-level paging, so that the startup code can access them in order to populate the kernel page tables. Signed-off-by: Ard Biesheuvel --- arch/x86/kernel/head64.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/x86/kernel/head64.c b/arch/x86/kernel/head64.c index 533fcf5636fc..1bc40d0785ee 100644 --- a/arch/x86/kernel/head64.c +++ b/arch/x86/kernel/head64.c @@ -52,10 +52,13 @@ SYM_PIC_ALIAS(next_early_pgt); pmdval_t early_pmd_flags = __PAGE_KERNEL_LARGE & ~(_PAGE_GLOBAL | _PAGE_NX); unsigned int __pgtable_l5_enabled __ro_after_init; +SYM_PIC_ALIAS(__pgtable_l5_enabled); unsigned int pgdir_shift __ro_after_init = 39; EXPORT_SYMBOL(pgdir_shift); +SYM_PIC_ALIAS(pgdir_shift); unsigned int ptrs_per_p4d __ro_after_init = 1; EXPORT_SYMBOL(ptrs_per_p4d); +SYM_PIC_ALIAS(ptrs_per_p4d); unsigned long page_offset_base __ro_after_init = __PAGE_OFFSET_BASE_L4; EXPORT_SYMBOL(page_offset_base); -- 2.50.0.727.gbf7dc18ff4-goog