diff options
| author | Tom Lendacky <thomas.lendacky@amd.com> | 2024-03-22 10:41:06 -0500 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2024-03-24 05:00:35 +0100 |
| commit | 4d0d7e7852752ea56375ac8645f0239e21ca2b50 (patch) | |
| tree | 54ff84136257d188f166d705dfe5e90fc70d7374 | |
| parent | 8a8a9c9047d1089598bdb010ec44d7f14b4f9203 (diff) | |
x86/boot/64: Apply encryption mask to 5-level pagetable update
When running with 5-level page tables, the kernel mapping PGD entry is
updated to point to the P4D table. The assignment uses _PAGE_TABLE_NOENC,
which, when SME is active (mem_encrypt=on), results in a page table
entry without the encryption mask set, causing the system to crash on
boot.
Change the assignment to use _PAGE_TABLE instead of _PAGE_TABLE_NOENC so
that the encryption mask is set for the PGD entry.
Fixes: 533568e06b15 ("x86/boot/64: Use RIP_REL_REF() to access early_top_pgt[]")
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/8f20345cda7dbba2cf748b286e1bc00816fe649a.1711122067.git.thomas.lendacky@amd.com
| -rw-r--r-- | arch/x86/kernel/head64.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kernel/head64.c b/arch/x86/kernel/head64.c index 212e8e06aeba..7d2eb035b6a3 100644 --- a/arch/x86/kernel/head64.c +++ b/arch/x86/kernel/head64.c @@ -175,7 +175,7 @@ unsigned long __head __startup_64(unsigned long physaddr, p4d = (p4dval_t *)&RIP_REL_REF(level4_kernel_pgt); p4d[MAX_PTRS_PER_P4D - 1] += load_delta; - pgd[pgd_index(__START_KERNEL_map)] = (pgdval_t)p4d | _PAGE_TABLE_NOENC; + pgd[pgd_index(__START_KERNEL_map)] = (pgdval_t)p4d | _PAGE_TABLE; } RIP_REL_REF(level3_kernel_pgt)[PTRS_PER_PUD - 2].pud += load_delta; |