linux-toradex.git/arch, branch v2.6.27.19

x86/cpa: make sure cpa is safe to call in lazy mmu mode

2009-02-20T22:36:58+00:00

commit 4f06b0436b2ddbd3b67b10e77098a6862787b3eb upstream.

Impact: fix race leading to crash under KVM and Xen

The CPA code may be called while we're in lazy mmu update mode - for
example, when using DEBUG_PAGE_ALLOC and doing a slab allocation
in an interrupt handler which interrupted a lazy mmu update.  In this
case, the in-memory pagetable state may be out of date due to pending
queued updates.  We need to flush any pending updates before inspecting
the page table.  Similarly, we must explicitly flush any modifications
CPA may have made (which comes down to flushing queued operations when
flushing the TLB).

Signed-off-by: Jeremy Fitzhardinge 
Acked-by: Marcelo Tosatti 
Signed-off-by: Ingo Molnar 
Signed-off-by: Greg Kroah-Hartman

powerpc/vsx: Fix VSX alignment handler for regs 32-63

2009-02-20T22:36:54+00:00

commit 26456dcfb8d8e43b1b64b2a14710694cf7a72f05 upstream.

Fix the VSX alignment handler for VSX registers > 32.  32-63 are stored
in the VMX part of the thread_struct not the FPR part.

Signed-off-by: Michael Neuling 
Signed-off-by: Benjamin Herrenschmidt 
Signed-off-by: Greg Kroah-Hartman

x86: fixup config space size of CPU functions for AMD family 11h

2009-02-17T17:46:29+00:00

commit ffd565a8b817d1eb4b25184e8418e8d96c3f56f6 upstream.

Impact: extend allowed configuration space access on 11h CPUs from 256 to 4K

Signed-off-by: Andreas Herrmann 
Acked-by: Jesse Barnes 
Signed-off-by: Ingo Molnar 
Cc: Chuck Ebbert 
Signed-off-by: Greg Kroah-Hartman

sparc64: Annotate sparc64 specific syscalls with SYSCALL_DEFINEx()

2009-02-17T17:46:26+00:00

[ Upstream commit e42650196df34789c825fa83f8bb37a5d5e52c14 ]

Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman

sparc: Enable syscall wrappers for 64-bit (CVE-2009-0029)

2009-02-17T17:46:26+00:00

[ Upstream commit 67605d6812691bbd2158d2f60259e0407611bc1b ]

sparc64 needs sign-extended function parameters. We have to enable
the system call wrappers.

Signed-off-by: Christian Borntraeger 
Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman

x86, vmi: put a missing paravirt_release_pmd in pgd_dtor

2009-02-17T17:46:18+00:00

commit 55a8ba4b7f76bebd7e8ce3f74c04b140627a1bad upstream.

Commit 6194ba6ff6ccf8d5c54c857600843c67aa82c407 ("x86: don't special-case
pmd allocations as much") made changes to the way we handle pmd allocations,
and while doing that it dropped a call to  paravirt_release_pd on the
pgd page from the pgd_dtor code path.

As a result of this missing release, the hypervisor is now unaware of the
pgd page being freed, and as a result it ends up tracking this page as a
page table page.

After this the guest may start using the same page for other purposes, and
depending on what use the page is put to, it may result in various performance
and/or functional issues ( hangs, reboots).

Since this release is only required for VMI, I now release the pgd page from
the (vmi)_pgd_free hook.

Signed-off-by: Alok N Kataria 
Acked-by: Jeremy Fitzhardinge 
Signed-off-by: Ingo Molnar 
Signed-off-by: Greg Kroah-Hartman

powerpc/fsl-booke: Fix mapping functions to use phys_addr_t

2009-02-17T17:46:16+00:00

commit 6c24b17453c8dc444a746e45b8a404498fc9fcf7 upstream.

Fixed v_mapped_by_tlbcam() and p_mapped_by_tlbcam() to use phys_addr_t
instead of unsigned long.  In 36-bit physical mode we really need these
functions to deal with phys_addr_t when trying to match a physical
address or when returning one.

Signed-off-by: Kumar Gala 
Signed-off-by: Greg Kroah-Hartman

powerpc: Fix swapcontext system for VSX + old ucontext size

2009-02-17T17:46:16+00:00

commit 16c29d180becc5bdf92fd0fc7314a44a671b5f4e upstream.

Since VSX support was added, we now have two sizes of ucontext_t;
the older, smaller size without the extra VSX state, and the new
larger size with the extra VSX state.  A program using the
sys_swapcontext system call and supplying smaller ucontext_t
structures will currently get an EINVAL error if the task has
used VSX (e.g. because of calling library code that uses VSX) and
the old_ctx argument is non-NULL (i.e. the program is asking for
its current context to be saved).  Thus the program will start
getting EINVAL errors on calls that previously worked.

This commit changes this behaviour so that we don't send an EINVAL in
this case.  It will now return the smaller context but the VSX MSR bit
will always be cleared to indicate that the ucontext_t doesn't include
the extra VSX state, even if the task has executed VSX instructions.

Both 32 and 64 bit cases are updated.

[paulus@samba.org - also fix some access_ok() and get_user() calls]

Thanks to Ben Herrenschmidt for noticing this problem.

Signed-off-by: Michael Neuling 
Signed-off-by: Paul Mackerras 
Cc: Benjamin Herrenschmidt 
Signed-off-by: Greg Kroah-Hartman

ACPI: don't load acpi_cpufreq if acpi=off

2009-02-12T17:31:15+00:00

commit ee297533279a802eac8b1cbea8e65b24b36a1aac upstream.

Signed-off-by: Yinghai Lu 
Signed-off-by: Len Brown 
Signed-off-by: Thomas Renninger 
Signed-off-by: Greg Kroah-Hartman

PCI: return error on failure to read PCI ROMs

2009-02-12T17:31:10+00:00

commit 97c44836cdec1ea713a15d84098a1a908157e68f upstream.

This patch makes the ROM reading code return an error to user space if
the size of the ROM read is equal to 0.

The patch also emits a warnings if the contents of the ROM are invalid,
and documents the effects of the "enable" file on ROM reading.

Signed-off-by: Timothy S. Nelson 
Acked-by: Alex Villacis-Lasso 
Signed-off-by: Jesse Barnes 
Signed-off-by: Greg Kroah-Hartman