lkml.org 
[lkml]   [2020]   [Jul]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v5 27/75] x86/idt: Move IDT to data segment
Date
From: Joerg Roedel <jroedel@suse.de>

With SEV-ES, exception handling is needed very early, even before the
kernel has cleared the bss segment. In order to prevent clearing the
currently used IDT, move the IDT to the data segment.

Signed-off-by: Joerg Roedel <jroedel@suse.de>
Reviewed-by: Kees Cook <keescook@chromium.org>
---
arch/x86/kernel/idt.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kernel/idt.c b/arch/x86/kernel/idt.c
index 7ecf9babf0cb..34fcc58b81b5 100644
--- a/arch/x86/kernel/idt.c
+++ b/arch/x86/kernel/idt.c
@@ -158,7 +158,7 @@ static const __initconst struct idt_data apic_idts[] = {
};

/* Must be page-aligned because the real IDT is used in the cpu entry area */
-static gate_desc idt_table[IDT_ENTRIES] __page_aligned_bss;
+static gate_desc idt_table[IDT_ENTRIES] __page_aligned_data;

static struct desc_ptr idt_descr __ro_after_init = {
.size = IDT_TABLE_SIZE - 1,
--
2.27.0
\
 
 \ /
  Last update: 2020-07-24 18:10    [W:0.283 / U:2.304 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site