linux-stable.git/arch/arm64/include, branch linux-3.7.y Linux kernel stable tree arm64: elf: fix core dumping to match what glibc expects 2013-01-28T04:49:01+00:00 Will Deacon will.deacon@arm.com 2013-01-22T15:34:40+00:00 88bf96babf604524df116b3e9c8400020bc87724 commit 9cf2b72b25f3f6a5a1a46a4f36037e66de52465c upstream. The kernel's internal definition of ELF_NGREG uses struct pt_regs, which means that we disagree with userspace on the size of coredumps since glibc correctly uses the user-visible struct user_pt_regs. This patch fixes our ELF_NGREG definition to use struct user_pt_regs and introduces our own ELF_CORE_COPY_REGS to convert between the user and kernel structure definitions. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit 9cf2b72b25f3f6a5a1a46a4f36037e66de52465c upstream.

The kernel's internal definition of ELF_NGREG uses struct pt_regs, which
means that we disagree with userspace on the size of coredumps since
glibc correctly uses the user-visible struct user_pt_regs.

This patch fixes our ELF_NGREG definition to use struct user_pt_regs
and introduces our own ELF_CORE_COPY_REGS to convert between the user
and kernel structure definitions.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
arm64: mm: only wrprotect clean ptes if they are present 2013-01-21T19:44:32+00:00 Will Deacon will.deacon@arm.com 2013-01-09T11:08:10+00:00 3cfafe0fa8c1d952a0ae2ced0a0817ed9450e3f5 commit 02522463c84748b3b8ad770f9424bcfa70a5b4c4 upstream. Marking non-present ptes as read-only can corrupt file ptes, breaking things like swap and file mappings. This patch ensures that we only manipulate user pte bits when the pte is marked present. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit 02522463c84748b3b8ad770f9424bcfa70a5b4c4 upstream.

Marking non-present ptes as read-only can corrupt file ptes, breaking
things like swap and file mappings.

This patch ensures that we only manipulate user pte bits when the pte
is marked present.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
arm64: compat for clock_adjtime(2) is miswired 2013-01-11T17:18:53+00:00 Al Viro viro@ZenIV.linux.org.uk 2012-12-05T11:48:56+00:00 7a13eba369913bfd2f363b722d2831db5c3669df commit 18a80376ddb0bdc466995ff58c844d6fd0a65e61 upstream. struct timex is different on arm and arm64; adjtimex(2) takes care to convert, clock_adjtime(2) doesn't... Signed-off-by: Al Viro <viro@ZenIV.linux.org.uk> Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit 18a80376ddb0bdc466995ff58c844d6fd0a65e61 upstream.

struct timex is different on arm and arm64; adjtimex(2) takes care to
convert, clock_adjtime(2) doesn't...

Signed-off-by: Al Viro <viro@ZenIV.linux.org.uk>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
arm64: Make !dirty ptes read-only 2013-01-11T17:18:17+00:00 Catalin Marinas catalin.marinas@arm.com 2012-11-28T17:06:05+00:00 a5220f902e102b27f529ffe3b9ef221583378597 commit 33eaa58f854770dc9c98411a356c98e3a53edfda upstream. The AArch64 Linux port relies on the mm code to wrprotect clean ptes. This however is not the case with newly created ptes and PAGE_SHARED(_EXEC) is writable but !dirty. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit 33eaa58f854770dc9c98411a356c98e3a53edfda upstream.

The AArch64 Linux port relies on the mm code to wrprotect clean ptes.
This however is not the case with newly created ptes and
PAGE_SHARED(_EXEC) is writable but !dirty.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
open*(2) compat fixes (s390, arm64) 2012-12-02T18:46:38+00:00 Al Viro viro@ZenIV.linux.org.uk 2012-12-02T17:55:07+00:00 9d73fc2d641f8831c9dc803177fe47c02120cc36 The usual rules for open()/openat()/open_by_handle_at() are 1) native 32bit - don't force O_LARGEFILE in flags 2) native 64bit - force O_LARGEFILE in flags 3) compat on 64bit host - as for native 32bit 4) native 32bit ABI for 64bit system (mips/n32, x86/x32) - as for native 64bit There are only two exceptions - s390 compat has open() forcing O_LARGEFILE and arm64 compat has open_by_handle_at() doing the same thing. The same binaries on native host (s390/31 and arm resp.) will *not* force O_LARGEFILE, so IMO both are emulation bugs. Objections? The fix is obvious... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> 
The usual rules for open()/openat()/open_by_handle_at() are
 1) native 32bit - don't force O_LARGEFILE in flags
 2) native 64bit - force O_LARGEFILE in flags
 3) compat on 64bit host - as for native 32bit
 4) native 32bit ABI for 64bit system (mips/n32, x86/x32) - as for
    native 64bit

There are only two exceptions - s390 compat has open() forcing
O_LARGEFILE and arm64 compat has open_by_handle_at() doing the same
thing.  The same binaries on native host (s390/31 and arm resp.) will
*not* force O_LARGEFILE, so IMO both are emulation bugs.

Objections? The fix is obvious...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
arm64: Distinguish between user and kernel XN bits 2012-11-16T15:50:25+00:00 Catalin Marinas catalin.marinas@arm.com 2012-11-15T17:21:16+00:00 8e620b0476696e9428442d3551f3dad47df0e28f On AArch64, the meaning of the XN bit has changed to UXN (user). The PXN (privileged) bit must be set to prevent kernel execution. Without the PXN bit set, the CPU may speculatively access device memory. This patch ensures that all the mappings that the kernel must not execute from (including user mappings) have the PXN bit set. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> 
On AArch64, the meaning of the XN bit has changed to UXN (user). The PXN
(privileged) bit must be set to prevent kernel execution. Without the
PXN bit set, the CPU may speculatively access device memory. This patch
ensures that all the mappings that the kernel must not execute from
(including user mappings) have the PXN bit set.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
arm64: mm: fix booting on systems with no memory below 4GB 2012-11-08T16:06:21+00:00 Will Deacon will.deacon@arm.com 2012-11-08T16:00:16+00:00 f483a853b0b932a1d75eb27a1dcbd732862260db Booting on a system with all of its memory above the 4GB boundary breaks for two reasons: (1) We still try to create a non-empty DMA32 zone (2) no-bootmem limits allocations to 0xffffffff This patch fixes these issues for ARM64. Tested-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> 
Booting on a system with all of its memory above the 4GB boundary breaks
for two reasons:

	(1) We still try to create a non-empty DMA32 zone
	(2) no-bootmem limits allocations to 0xffffffff

This patch fixes these issues for ARM64.

Tested-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
arm64: compat: select CONFIG_ARCH_WANT_COMPAT_IPC_PARSE_VERSION 2012-11-08T16:06:20+00:00 Will Deacon will.deacon@arm.com 2012-11-07T14:16:28+00:00 6212a512240f48d84090bc42a24d6dfb033754bc Commit c1d7e01d7877 ("ipc: use Kconfig options for __ARCH_WANT_[COMPAT_]IPC_PARSE_VERSION") replaced the __ARCH_WANT_COMPAT_IPC_PARSE_VERSION token with a corresponding Kconfig option instead. This patch updates arm64 to use the latter, rather than #define an unused token. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> 
Commit c1d7e01d7877 ("ipc: use Kconfig options for
__ARCH_WANT_[COMPAT_]IPC_PARSE_VERSION") replaced the
__ARCH_WANT_COMPAT_IPC_PARSE_VERSION token with a corresponding Kconfig
option instead.

This patch updates arm64 to use the latter, rather than #define an
unused token.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
arm64: elf: fix core dumping definitions for GP and FP registers 2012-11-08T16:06:20+00:00 Will Deacon will.deacon@arm.com 2012-11-06T19:28:48+00:00 6ba1bc826d160fe4f32bcb188687dcca4bdfaf3d struct user_fp does not exist for arm64, so use struct user_fpsimd_state instead for the ELF core dumping definitions. Furthermore, since we use regset-based core dumping, we do not need definitions for dump_task_regs and dump_fpu. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> 
struct user_fp does not exist for arm64, so use struct user_fpsimd_state
instead for the ELF core dumping definitions. Furthermore, since we use
regset-based core dumping, we do not need definitions for dump_task_regs
and dump_fpu.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
arm64: Move PCI_IOBASE closer to MODULES_VADDR 2012-10-23T14:30:51+00:00 Catalin Marinas catalin.marinas@arm.com 2012-10-23T13:51:16+00:00 e3978cded41dc7b364e74037f56d6bc558c11fd7 This is to reuse the same pmd table that is sparsely populated with the modules space. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> 
This is to reuse the same pmd table that is sparsely populated with
the modules space.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>