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Avi Kivity ac1b714e78 KVM: MMU: Fix guest writes to nonpae pde 
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: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-03-18 10:49:09 +02:00
..
acorn [ARM] Acorn: move the i2c bus driver into drivers/i2c 2007-03-04 20:40:50 +00:00
acpi [PATCH] misc NULL noise 2007-03-14 15:27:49 -07:00
amba
ata [PATCH] trivial ATA iomem annotations 2007-03-14 15:27:50 -07:00
atm [PATCH] zatm __init abuse 2007-03-14 15:27:49 -07:00
auxdisplay [PATCH] cfag12864b: fix crash when built-in and no parport present 2007-02-20 17:10:14 -08:00
base [PATCH] sysfs and driver core: add callback helper, used by SCSI and S390 2007-03-15 15:29:26 -07:00
block [PATCH] paride endianness annotations 2007-03-14 15:27:50 -07:00
bluetooth [Bluetooth] Make use of MODULE_FIRMWARE 2007-02-26 11:42:42 -08:00
cdrom [PATCH] Fix soft lockup with iSeries viocd driver 2007-03-05 07:57:51 -08:00
char Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus 2007-03-16 19:28:15 -07:00
clocksource [PATCH] clocksource init adjustments (fix bug #7426) 2007-03-05 07:57:53 -08:00
connector [CONNECTOR]: Bugfix for cn_call_callback() 2007-03-07 16:08:08 -08:00
cpufreq Revert "[CPUFREQ] constify cpufreq_driver where possible." 2007-02-26 14:55:48 -08:00
crypto [PATCH] geode-aes: use unsigned long for spin_lock_irqsave 2007-03-06 09:30:25 -08:00
dio
dma [PATCH] rm pointless dmaengine exports 2007-03-16 19:25:03 -07:00
edac
eisa
fc4
firmware
hid Merge branch 'for-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jikos/hid 2007-03-15 10:50:54 -07:00
hwmon [PATCH] hwmon: Build fix for SENSORS_W83793 2007-03-16 19:25:06 -07:00
i2c [ARM] Acorn: move the i2c bus driver into drivers/i2c 2007-03-04 20:40:50 +00:00
ide ide: remove CONFIG_IDEDMA_{ICS,PCI}_AUTO config options 2007-03-17 21:57:41 +01:00
ieee1394 Merge git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial 2007-02-19 13:29:02 -08:00
infiniband [PATCH] fix ipath_dma_free_coherent() prototype 2007-03-14 15:27:49 -07:00
input Merge branch 'for-linus' of master.kernel.org:/pub/scm/linux/kernel/git/dtor/input 2007-03-08 07:28:30 -08:00
isdn [PATCH] Fix buffer overflow and races in capi debug functions 2007-03-01 14:53:39 -08:00
kvm KVM: MMU: Fix guest writes to nonpae pde 2007-03-18 10:49:09 +02:00
leds
macintosh backlight: Separate backlight properties from backlight ops pointers 2007-02-20 09:26:53 +00:00
mca
md [PATCH] fix read past end of array in md/linear.c 2007-03-16 19:25:03 -07:00
media [PATCH] misc NULL noise 2007-03-14 15:27:49 -07:00
message
mfd [PATCH] drivers/mfd/sm501.c: Replace pci_module_init with pci_register_driver 2007-02-26 12:35:47 -08:00
misc asus-laptop: make code static 2007-03-09 21:06:40 -05:00
mmc [ARM] 4256/1: i.MX/MX1 SDHC fix/workaround of SD card recognition problems 2007-03-12 16:49:37 +00:00
mtd [MTD] [OneNAND] Classify the page data and oob buffer 2007-03-09 08:08:09 +00:00
net natsemi: Avoid IntrStatus lossage if RX state machine resets. 2007-03-15 10:59:54 -04:00
nubus
oprofile
parisc Merge master.kernel.org:/pub/scm/linux/kernel/git/kyle/parisc-2.6 2007-02-26 12:48:06 -08:00
parport [PATCH] parport_pc: fix parport_pc_probe_port section warning 2007-02-20 17:10:16 -08:00
pci [PATCH] pci: Repair pci_save/restore_state so we can restore one save many times. 2007-03-12 16:31:50 -07:00
pcmcia Driver core: more fallout from class_device changes for pcmcia 2007-02-23 14:52:09 -08:00
pnp [PATCH] reduce pnp syslog spam 2007-03-16 19:25:02 -07:00
ps3 [PATCH] C99 initializers, proper use of const in drivers/ps3 2007-03-14 15:27:50 -07:00
rapidio
rtc [ARM] rtc-pcf8583: Final fixes for this RTC on RiscPC 2007-03-04 20:33:07 +00:00
s390 [PATCH] sysfs and driver core: add callback helper, used by SCSI and S390 2007-03-15 15:29:26 -07:00
sbus [SPARC] uctrl: Check request_irq() return value. 2007-02-26 11:35:51 -08:00
scsi [PATCH] sysfs and driver core: add callback helper, used by SCSI and S390 2007-03-15 15:29:26 -07:00
serial [PATCH] 2.6 Altix: console fix for CONFIG_DEBUG_SHIRQ usage 2007-03-08 07:39:15 -08:00
sh
sn
spi [PATCH] spi_s3c24xx.c: warning fix 2007-03-16 19:25:06 -07:00
tc
telephony
usb Revert "USB: pxa2xx_udc: fix hardcoded irq number" 2007-03-10 14:22:07 -08:00
video [PATCH] bool fbdevs must depend on FB = y 2007-03-16 19:25:05 -07:00
w1
zorro
Kconfig
Makefile