From: Borislav Petkov <[email protected]> No need to setup those during boot on !Intel vendors.
Signed-off-by: Borislav Petkov <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Andy Lutomirsky <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Dave Hansen <[email protected]> Cc: Greg KH <[email protected]> Cc: [email protected] Cc: [email protected] Cc: Brian Gerst <[email protected]> Cc: Josh Poimboeuf <[email protected]> Cc: Denys Vlasenko <[email protected]> Cc: Boris Ostrovsky <[email protected]> Cc: Juergen Gross <[email protected]> Cc: David Laight <[email protected]> Cc: Eduardo Valentin <[email protected]> Cc: [email protected] Cc: Will Deacon <[email protected]> Cc: [email protected] --- arch/x86/kernel/cpu/common.c | 16 ++++++++++------ 1 file changed, 10 insertions(+), 6 deletions(-) diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c index 7b2988e521a7..bca5570d40bc 100644 --- a/arch/x86/kernel/cpu/common.c +++ b/arch/x86/kernel/cpu/common.c @@ -582,12 +582,16 @@ static void __init setup_cpu_entry_area(int cpu) #ifdef CONFIG_CPU_SUP_INTEL BUILD_BUG_ON(sizeof(struct debug_store) % PAGE_SIZE != 0); - set_percpu_fixmap_pages(get_cpu_entry_area_index(cpu, cpu_debug_store), - &per_cpu(cpu_debug_store, cpu), - sizeof(struct debug_store) / PAGE_SIZE, - PAGE_KERNEL); - set_percpu_fixmap_ptes(get_cpu_entry_area_index(cpu, cpu_debug_buffers), - sizeof(struct debug_store_buffers) / PAGE_SIZE); + + if (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) { + set_percpu_fixmap_pages(get_cpu_entry_area_index(cpu, cpu_debug_store), + &per_cpu(cpu_debug_store, cpu), + sizeof(struct debug_store) / PAGE_SIZE, + PAGE_KERNEL); + + set_percpu_fixmap_ptes(get_cpu_entry_area_index(cpu, cpu_debug_buffers), + sizeof(struct debug_store_buffers) / PAGE_SIZE); + } #endif set_percpu_fixmap_ptes(get_cpu_entry_area_index(cpu, ldt_entries), (LDT_ENTRIES * LDT_ENTRY_SIZE) / PAGE_SIZE); -- 2.13.0
