From: Jason Yan <yanaijie@huawei.com>
To: <mpe@ellerman.id.au>, <linuxppc-dev@lists.ozlabs.org>,
<diana.craciun@nxp.com>, <christophe.leroy@c-s.fr>,
<benh@kernel.crashing.org>, <paulus@samba.org>,
<npiggin@gmail.com>, <keescook@chromium.org>,
<kernel-hardening@lists.openwall.com>
Cc: <linux-kernel@vger.kernel.org>, <wangkefeng.wang@huawei.com>,
<yebin10@huawei.com>, <thunder.leizhen@huawei.com>,
<jingxiangfeng@huawei.com>, <fanchengyang@huawei.com>,
Jason Yan <yanaijie@huawei.com>
Subject: [RFC PATCH 03/10] powerpc: introduce kimage_vaddr to store the kernel base
Date: Wed, 17 Jul 2019 16:06:14 +0800 [thread overview]
Message-ID: <20190717080621.40424-4-yanaijie@huawei.com> (raw)
In-Reply-To: <20190717080621.40424-1-yanaijie@huawei.com>
Now the kernel base is a fixed value - KERNELBASE. To support KASLR, we
need a variable to store the kernel base.
Signed-off-by: Jason Yan <yanaijie@huawei.com>
Cc: Diana Craciun <diana.craciun@nxp.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Christophe Leroy <christophe.leroy@c-s.fr>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Kees Cook <keescook@chromium.org>
---
arch/powerpc/include/asm/page.h | 2 ++
arch/powerpc/mm/init-common.c | 2 ++
2 files changed, 4 insertions(+)
diff --git a/arch/powerpc/include/asm/page.h b/arch/powerpc/include/asm/page.h
index 0d52f57fca04..60a68d3a54b1 100644
--- a/arch/powerpc/include/asm/page.h
+++ b/arch/powerpc/include/asm/page.h
@@ -315,6 +315,8 @@ void arch_free_page(struct page *page, int order);
struct vm_area_struct;
+extern unsigned long kimage_vaddr;
+
#include <asm-generic/memory_model.h>
#endif /* __ASSEMBLY__ */
#include <asm/slice.h>
diff --git a/arch/powerpc/mm/init-common.c b/arch/powerpc/mm/init-common.c
index 9273c38009cb..c7a98c73e5c1 100644
--- a/arch/powerpc/mm/init-common.c
+++ b/arch/powerpc/mm/init-common.c
@@ -25,6 +25,8 @@ phys_addr_t memstart_addr = (phys_addr_t)~0ull;
EXPORT_SYMBOL(memstart_addr);
phys_addr_t kernstart_addr;
EXPORT_SYMBOL(kernstart_addr);
+unsigned long kimage_vaddr = KERNELBASE;
+EXPORT_SYMBOL(kimage_vaddr);
static bool disable_kuep = !IS_ENABLED(CONFIG_PPC_KUEP);
static bool disable_kuap = !IS_ENABLED(CONFIG_PPC_KUAP);
--
2.17.2
next prev parent reply other threads:[~2019-07-17 7:50 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-17 8:06 [RFC PATCH 00/10] implement KASLR for powerpc/fsl_booke/32 Jason Yan
2019-07-17 8:06 ` [RFC PATCH 01/10] powerpc: unify definition of M_IF_NEEDED Jason Yan
2019-07-29 10:59 ` Christophe Leroy
2019-07-17 8:06 ` [RFC PATCH 02/10] powerpc: move memstart_addr and kernstart_addr to init-common.c Jason Yan
2019-07-29 11:00 ` Christophe Leroy
2019-07-29 14:31 ` Christoph Hellwig
2019-07-30 0:47 ` Jason Yan
2019-07-17 8:06 ` Jason Yan [this message]
2019-07-29 11:00 ` [RFC PATCH 03/10] powerpc: introduce kimage_vaddr to store the kernel base Christophe Leroy
2019-07-29 14:32 ` Christoph Hellwig
2019-07-17 8:06 ` [RFC PATCH 04/10] powerpc/fsl_booke/32: introduce create_tlb_entry() helper Jason Yan
2019-07-29 11:05 ` Christophe Leroy
2019-07-29 13:26 ` Jason Yan
2019-07-17 8:06 ` [RFC PATCH 05/10] powerpc/fsl_booke/32: introduce reloc_kernel_entry() helper Jason Yan
2019-07-29 11:08 ` Christophe Leroy
2019-07-29 13:35 ` Jason Yan
2019-07-17 8:06 ` [RFC PATCH 06/10] powerpc/fsl_booke/32: implement KASLR infrastructure Jason Yan
2019-07-29 11:16 ` Christophe Leroy
2019-07-17 8:06 ` [RFC PATCH 07/10] powerpc/fsl_booke/32: randomize the kernel image offset Jason Yan
2019-07-29 11:33 ` Christophe Leroy
2019-07-29 13:53 ` Jason Yan
2019-07-17 8:06 ` [RFC PATCH 08/10] powerpc/fsl_booke/kaslr: clear the original kernel if randomized Jason Yan
2019-07-29 11:19 ` Christophe Leroy
2019-07-29 13:43 ` Jason Yan
2019-07-17 8:06 ` [RFC PATCH 09/10] powerpc/fsl_booke/kaslr: support nokaslr cmdline parameter Jason Yan
2019-07-29 11:38 ` Christophe Leroy
2019-07-29 14:04 ` Jason Yan
2019-07-17 8:06 ` [RFC PATCH 10/10] powerpc/fsl_booke/kaslr: dump out kernel offset information on panic Jason Yan
2019-07-29 11:43 ` Christophe Leroy
2019-07-29 14:08 ` Jason Yan
2019-07-25 7:16 ` [RFC PATCH 00/10] implement KASLR for powerpc/fsl_booke/32 Jason Yan
2019-07-25 19:58 ` Kees Cook
2019-07-26 7:20 ` Jason Yan
2019-07-26 16:15 ` Kees Cook
2019-07-26 7:04 ` Diana Madalina Craciun
2019-07-26 7:26 ` Jason Yan
2019-07-29 14:30 ` Diana Madalina Craciun
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