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  1. 19 3月, 2007 12 次提交
  3. 18 3月, 2007 10 次提交
    • A
      KVM: MMU: Fix host memory corruption on i386 with >= 4GB ram · 27aba766
      由 Avi Kivity 提交于 
      PAGE_MASK is an unsigned long, so using it to mask physical addresses on
i386 (which are 64-bit wide) leads to truncation.  This can result in
page->private of unrelated memory pages being modified, with disasterous
results.

Fix by not using PAGE_MASK for physical addresses; instead calculate
the correct value directly from PAGE_SIZE.  Also fix a similar BUG_ON().
Acked-by: NIngo Molnar <mingo@elte.hu>
Signed-off-by: NAvi Kivity <avi@qumranet.com>
      27aba766
    • A
      KVM: MMU: Fix guest writes to nonpae pde · ac1b714e
      由 Avi Kivity 提交于 
      KVM shadow page tables are always in pae mode, regardless of the guest
setting.  This means that a guest pde (mapping 4MB of memory) is mapped
to two shadow pdes (mapping 2MB each).

When the guest writes to a pte or pde, we intercept the write and emulate it.
We also remove any shadowed mappings corresponding to the write.  Since the
mmu did not account for the doubling in the number of pdes, it removed the
wrong entry, resulting in a mismatch between shadow page tables and guest
page tables, followed shortly by guest memory corruption.

This patch fixes the problem by detecting the special case of writing to
a non-pae pde and adjusting the address and number of shadow pdes zapped
accordingly.
Acked-by: NIngo Molnar <mingo@elte.hu>
Signed-off-by: NAvi Kivity <avi@qumranet.com>
      ac1b714e
    • A
      KVM: Fix guest sysenter on vmx · f5b42c33
      由 Avi Kivity 提交于 
      The vmx code currently treats the guest's sysenter support msrs as 32-bit
values, which breaks 32-bit compat mode userspace on 64-bit guests.  Fix by
using the native word width of the machine.
Signed-off-by: NAvi Kivity <avi@qumranet.com>
      f5b42c33
    • A
      KVM: Unset kvm_arch_ops if arch module loading failed · ca45aaae
      由 Avi Kivity 提交于 
      Otherwise, the core module thinks the arch module is loaded, and won't
let you reload it after you've fixed the bug.
Signed-off-by: NAvi Kivity <avi@qumranet.com>
      ca45aaae
    • B
      ide: remove CONFIG_IDEDMA_{ICS,PCI}_AUTO config options · 120b9cfd
      由 Bartlomiej Zolnierkiewicz 提交于 
      All modern distributions have been setting these options to "y" for ages.
(additionally "n" cases have been obsoleted for few years).  Therefore use
DMA by default and remove CONFIG_IDEDMA_{ICS,PCI}_AUTO (also remove no longer
needed CONFIG_IDEDMA_AUTO).  This fixes DMA support for rare configurations
where CONFIG_IDEDMA_{ICS,PCI}_AUTO was set to "n" but "hdparm -d 1" was used
to enable DMA support and which were forced to PIO mode by "ide: don't allow
DMA to be enabled if CONFIG_IDEDMA_{ICS,PCI}_AUTO=n" patch.  There is no
functionality loss because "ide=nodma" kernel option is still available.

Cc: Patrick Horn <phrh@yahoo.com>
Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Cc: Russell King <rmk+lkml@arm.linux.org.uk>
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
      120b9cfd
    • B
      ide: don't allow DMA to be enabled if CONFIG_IDEDMA_{ICS,PCI}_AUTO=n · 6f5050a9
      由 Bartlomiej Zolnierkiewicz 提交于 
      For CONFIG_IDEDMA_{ICS,PCI}_AUTO=n and/or "ide=nodma" option the host/device
are not programmed for DMA and it is also explicitly disabled by ide_set_dma()
(->ide_dma_check returns "-1").  However the code responsible for manually
enabling DMA ("hdparm -d 1") has a bug which results in DMA being erroneously
enabled - ide_set_dma() incorrectly passes "0" return value to set_using_dma().
This may work if BIOS/firmware configured the host/device for DMA and chipset
allows independent configuration of DMA/PIO modes but won't work after suspend
and is generally unsafe on many chipsets (possibly including data corruption
if the same registers are used for DMA/PIO timings).

This patch fixes kernel bugzilla bug #8169 (piix host driver fixes for
setting PIO mode exposed the problem described above).  The side-effect of
the fix is that some rare configuration may be forced to PIO mode when DMA
mode was previously used - this is addressed by the next patch which removes
CONFIG_IDEDMA_{PCI,ICS}_AUTO config option completely.

Thanks goes out to Patrick Horn for reporting the issue, narrowing it down
to the specific commit and testing the fix.  Also thanks to Sergei Shtylyov
for help in debugging the problem.

Cc: Patrick Horn <phrh@yahoo.com>
Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Cc: Russell King <rmk+lkml@arm.linux.org.uk>
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
      6f5050a9
    • K
      scc_pata: dependency fix · a1067db8
      由 Kou Ishizaki 提交于 
      This patch fixes:
* the dependency of scc_pata on BLK_DEV_IDEDMA_PCI
* incorrect link to ide-core
* move scc_pata from ide/ppc to ide/pci
Signed-off-by: NKou Ishizaki <kou.ishizaki@toshiba.co.jp>
Signed-off-by: NAkira Iguchi <akira2.iguchi@toshiba.co.jp>
Cc: Al Viro <viro@ftp.linux.org.uk>,
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
      a1067db8
    • T
      jmicron: make ide jmicron driver play nice with libata ones · ebbc2031
      由 Tejun Heo 提交于 
      When libata is configured, the device is configured such that SATA and
PATA ports live in separate functions with different programming
interfaces.  pata_jmicron and ide jmicron drivers can drive only the
PATA part.

This patch makes jmicron match PCI class code such that it doesn't
attach itself to the SATA part preventing the proper ahci driver from
attaching.

This change is suggested by Bartlomiej.
Signed-off-by: NTejun Heo <htejun@gmail.com>
Cc: Jeff Garzik <jeff@garzik.org>
Cc: justin@jmicron.com
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
      ebbc2031
    • R
      ide: au1xxx: fix use of mixed declarations and code · 1918fd63
      由 Ralf Baechle 提交于 
      drivers/ide/mips/au1xxx-ide.c:684: warning: ISO C90 forbids mixed declarations and code
Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
      1918fd63
    • S
      cmd64x: fix recovery time calculation (take 3) · e277a1aa
      由 Sergei Shtylyov 提交于 
      The driver wrongly takes the address setup time into account when calculating
the PIO recovery time -- this leads to slight overclocking of the PIO modes 0
and 1 (so, the prayers failed to help, as usual :-).  Rework the code to be
calculating recovery clock count as a difference between the total cycle count
and the active count (we don't need to calculate the recovery time itself since
it's not specified for the PIO modes 0 to 2, and for modes 3 and 4 this formula
gives enough recovery time anyway in the chip's supported PCI frequency range).

This patch has been inspired by reading the datasheets and looking at what the
libata driver does; it has been compile-tested only (as usual :-) but anyway,
the new code gives the same or longer recovery times than the old one...
Signed-off-by: NSergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
      e277a1aa
  5. 17 3月, 2007 15 次提交
  7. 16 3月, 2007 1 次提交
    • A
      [PATCH] sysfs and driver core: add callback helper, used by SCSI and S390 · d9a9cdfb
      由 Alan Stern 提交于 
      This patch (as868) adds a helper routine for device drivers that need
to set up a callback to perform some action in a different process's
context.  This is intended for use by attribute methods that want to
unregister themselves or their parent device.  Attribute method calls
are mutually exclusive with unregistration, so such actions cannot be
taken directly.

Two attribute methods are converted to use the new helper routine: one
for SCSI device deletion and one for System/390 ccwgroup devices.
Signed-off-by: NAlan Stern <stern@rowland.harvard.edu>
Cc: Hugh Dickins <hugh@veritas.com>
Cc: Cornelia Huck <cornelia.huck@de.ibm.com>
Cc: Oliver Neukum <oneukum@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      d9a9cdfb
  9. 15 3月, 2007 2 次提交
    • B
      natsemi: Avoid IntrStatus lossage if RX state machine resets. · d2a90036
      由 broonie@sirena.org.uk 提交于 
      This patch fixes the poll routine for the natsemi driver so that if the
driver detects an RX state machine lockup then no interrupts will be
lost while the driver recovers from that.
Signed-Off-By: NMark Brown <broonie@sirena.org.uk>
Signed-off-by: NJeff Garzik <jeff@garzik.org>
      d2a90036
    • B
      natsemi: Fix NAPI for interrupt sharing · 069f8256
      由 broonie@sirena.org.uk 提交于 
      The interrupt status register for the natsemi chips is clear on read and
was read unconditionally from both the interrupt and from the NAPI poll
routine, meaning that if the interrupt service routine was called (for
example, due to a shared interrupt) while a NAPI poll was scheduled
interrupts could be missed.  This patch fixes that by ensuring that the
interrupt status register is only read by the interrupt handler when
interrupts are enabled from the chip.

It also reverts a workaround for this problem from the netpoll hook and
improves the trace for interrupt events.

Thanks to Sergei Shtylyov <sshtylyov@ru.mvista.com> for spotting the
issue, Mark Huth <mhuth@mvista.com> for a simpler method and Simon
Blake <simon@citylink.co.nz> for testing resources.
Signed-Off-By: NMark Brown <broonie@sirena.org.uk>
Signed-off-by: NJeff Garzik <jeff@garzik.org>
      069f8256