From 3814bf08452ecfc6db0de53a2e4f977e9661c1f4 Mon Sep 17 00:00:00 2001 From: Ingo Molnar Date: Thu, 15 May 2025 14:05:19 +0200 Subject: [PATCH] x86/boot/e820: Simplify the PPro Erratum #50 workaround No need to print out the table - users won't really be able to tell much from it anyway and the messages around this erratum are unnecessarily obtuse. Instead clearly inform the user that a 256 kB hole is being punched in their memory map at the 1.75 GB physical address. Not that there are many PPro users left. :-) Signed-off-by: Ingo Molnar Cc: H . Peter Anvin Cc: Andy Shevchenko Cc: Arnd Bergmann Cc: David Woodhouse Cc: Juergen Gross Cc: Kees Cook Cc: Linus Torvalds Cc: Mike Rapoport Cc: Paul Menzel Cc: Peter Zijlstra Link: https://patch.msgid.link/20250515120549.2820541-4-mingo@kernel.org --- arch/x86/kernel/setup.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c index 1b2edd07a3e17..a231b249d23b2 100644 --- a/arch/x86/kernel/setup.c +++ b/arch/x86/kernel/setup.c @@ -1015,11 +1015,9 @@ void __init setup_arch(char **cmdline_p) trim_bios_range(); #ifdef CONFIG_X86_32 if (ppro_with_ram_bug()) { - e820__range_update(0x70000000ULL, 0x40000ULL, E820_TYPE_RAM, - E820_TYPE_RESERVED); + pr_info("Applying PPro RAM bug workaround: punching 256 kB hole at 1.75 GB physical.\n"); + e820__range_update(0x70000000ULL, SZ_256K, E820_TYPE_RAM, E820_TYPE_RESERVED); e820__update_table(e820_table); - printk(KERN_INFO "fixed physical RAM map:\n"); - e820__print_table("bad_ppro"); } #else early_gart_iommu_check(); -- 2.47.3