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Commit 55c09c9b authored by Preeti Nagar's avatar Preeti Nagar
Browse files

RTIC: Move selinux_state to a separate 4k 



We need to relocate selinux_state to a separate 4k page
to enable EL2 Hypervisor to monitor changes to this
variable using ARM stage 2 MMU. We will avoid getting
page faults from un-related data as the MMU granularity
is configured to 4k.

Change-Id: I7d0e5c9eae0a2a65ca9db73e85283e164e20c11c
Signed-off-by: default avatarPreeti Nagar <pnagar@codeaurora.org>
parent cb9b0395

arch/arm64/kernel/vmlinux.lds.S

+9 −0
Original line number Diff line number Diff line
@@ -5,6 +5,15 @@ 
 * Written by Martin Mares <mj@atrey.karlin.mff.cuni.cz>

 */



#ifdef CONFIG_QCOM_RTIC

#define BSS_FIRST_SECTIONS				\

	. = ALIGN(PAGE_SIZE);				\

	KEEP(*(.bss.rtic))				\

	. = ALIGN(PAGE_SIZE);

#else

#define BSS_FIRST_SECTIONS

#endif



#include <asm-generic/vmlinux.lds.h>

#include <asm/cache.h>

#include <asm/kernel-pgtable.h>

include/linux/init.h

+4 −0
Original line number Diff line number Diff line
@@ -322,6 +322,10 @@ void __init parse_early_options(char *cmdline); 
/* Data marked not to be saved by software suspend */

#define __nosavedata __section(.data..nosave)



#ifdef CONFIG_QCOM_RTIC

#define __rticdata  __section(.bss.rtic)

#endif



#ifdef MODULE

#define __exit_p(x) x

#else

security/selinux/hooks.c

+4 −0
Original line number Diff line number Diff line
@@ -103,7 +103,11 @@ 
#include "audit.h"

#include "avc_ss.h"



#ifdef CONFIG_QCOM_RTIC

struct selinux_state selinux_state __rticdata;

#else

struct selinux_state selinux_state;

#endif



/* SECMARK reference count */

static atomic_t selinux_secmark_refcount = ATOMIC_INIT(0);