linux-kernel - Re: [PATCH 5/9] x86/mm: Make LDT_BASE

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Message-ID: <20180214133238.cliqsqp5rdggjzqy@black.fi.intel.com>
Date:   Wed, 14 Feb 2018 16:32:38 +0300
From:   "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
To:     Ingo Molnar <mingo@...hat.com>, x86@...nel.org,
        Thomas Gleixner <tglx@...utronix.de>,
        "H. Peter Anvin" <hpa@...or.com>, g@...ck.fi.intel.com
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        Andy Lutomirski <luto@...capital.net>,
        Borislav Petkov <bp@...e.de>, Andi Kleen <ak@...ux.intel.com>,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 5/9] x86/mm: Make LDT_BASE_ADDR dynamic

On Wed, Feb 14, 2018 at 11:16:52AM +0000, Kirill A. Shutemov wrote:
> LDT_BASE_ADDR has different value in 4- and 5-level paging
> configurations.
> 
> We need to make it dynamic in preparation for boot-time switching
> between paging modes.
> 
> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>

I've just realized that the patch that I'm splitting has hunk that belong
here.

Could you fold it in?

Sorry for this.

diff --git a/arch/x86/mm/dump_pagetables.c b/arch/x86/mm/dump_pagetables.c
index 9efee6f464ab..a32f0621d664 100644
--- a/arch/x86/mm/dump_pagetables.c
+++ b/arch/x86/mm/dump_pagetables.c
@@ -579,6 +579,9 @@ static int __init pt_dump_init(void)
 	address_markers[KASAN_SHADOW_START_NR].start_address = KASAN_SHADOW_START;
 	address_markers[KASAN_SHADOW_END_NR].start_address = KASAN_SHADOW_END;
 #endif
+#ifdef CONFIG_MODIFY_LDT_SYSCALL
+        address_markers[LDT_NR].start_address = LDT_BASE_ADDR;
+#endif
 #endif
 #ifdef CONFIG_X86_32
 	address_markers[VMALLOC_START_NR].start_address = VMALLOC_START;
-- 
 Kirill A. Shutemov