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Aneesh Kumar K.V 36e7bb3802 powerpc: book3s: kvm: Don't abuse host r2 in exit path 
We don't use PACATOC for PR. Avoid updating HOST_R2 with PR
KVM mode when both HV and PR are enabled in the kernel. Without this we
get the below crash

(qemu)
Unable to handle kernel paging request for data at address 0xffffffffffff8310
Faulting instruction address: 0xc00000000001d5a4
cpu 0x2: Vector: 300 (Data Access) at [c0000001dc53aef0]
    pc: c00000000001d5a4: .vtime_delta.isra.1+0x34/0x1d0
    lr: c00000000001d760: .vtime_account_system+0x20/0x60
    sp: c0000001dc53b170
   msr: 8000000000009032
   dar: ffffffffffff8310
 dsisr: 40000000
  current = 0xc0000001d76c62d0
  paca    = 0xc00000000fef1100   softe: 0        irq_happened: 0x01
    pid   = 4472, comm = qemu-system-ppc
enter ? for help
[c0000001dc53b200] c00000000001d760 .vtime_account_system+0x20/0x60
[c0000001dc53b290] c00000000008d050 .kvmppc_handle_exit_pr+0x60/0xa50
[c0000001dc53b340] c00000000008f51c kvm_start_lightweight+0xb4/0xc4
[c0000001dc53b510] c00000000008cdf0 .kvmppc_vcpu_run_pr+0x150/0x2e0
[c0000001dc53b9e0] c00000000008341c .kvmppc_vcpu_run+0x2c/0x40
[c0000001dc53ba50] c000000000080af4 .kvm_arch_vcpu_ioctl_run+0x54/0x1b0
[c0000001dc53bae0] c00000000007b4c8 .kvm_vcpu_ioctl+0x478/0x730
[c0000001dc53bca0] c0000000002140cc .do_vfs_ioctl+0x4ac/0x770
[c0000001dc53bd80] c0000000002143e8 .SyS_ioctl+0x58/0xb0
[c0000001dc53be30] c000000000009e58 syscall_exit+0x0/0x98

Signed-off-by: Alexander Graf <agraf@suse.de>
2013-12-18 11:29:31 +01:00
..
alpha kernel: remove CONFIG_USE_GENERIC_SMP_HELPERS 2013-11-15 09:32:22 +09:00
arc kernel: remove CONFIG_USE_GENERIC_SMP_HELPERS 2013-11-15 09:32:22 +09:00
arm Here are the 3.13 KVM changes. There was a lot of work on the PPC 2013-11-15 13:51:36 +09:00
arm64 Here are the 3.13 KVM changes. There was a lot of work on the PPC 2013-11-15 13:51:36 +09:00
avr32 avr32: handle pgtable_page_ctor() fail 2013-11-15 09:32:17 +09:00
blackfin kernel: remove CONFIG_USE_GENERIC_SMP_HELPERS 2013-11-15 09:32:22 +09:00
c6x DeviceTree updates for 3.13. This is a bit larger pull request than 2013-11-12 16:52:17 +09:00
cris cris: handle pgtable_page_ctor() fail 2013-11-15 09:32:17 +09:00
frv frv: handle pgtable_page_ctor() fail 2013-11-15 09:32:17 +09:00
hexagon kernel: remove CONFIG_USE_GENERIC_SMP_HELPERS 2013-11-15 09:32:22 +09:00
ia64 Here are the 3.13 KVM changes. There was a lot of work on the PPC 2013-11-15 13:51:36 +09:00
m32r kernel: remove CONFIG_USE_GENERIC_SMP_HELPERS 2013-11-15 09:32:22 +09:00
m68k m68k: handle pgtable_page_ctor() fail 2013-11-15 09:32:17 +09:00
metag kernel: remove CONFIG_USE_GENERIC_SMP_HELPERS 2013-11-15 09:32:22 +09:00
microblaze microblaze: add missing pgtable_page_ctor/dtor calls 2013-11-15 09:32:16 +09:00
mips Here are the 3.13 KVM changes. There was a lot of work on the PPC 2013-11-15 13:51:36 +09:00
mn10300 kernel: remove CONFIG_USE_GENERIC_SMP_HELPERS 2013-11-15 09:32:22 +09:00
openrisc openrisc: add missing pgtable_page_ctor/dtor calls 2013-11-15 09:32:16 +09:00
parisc kernel: remove CONFIG_USE_GENERIC_SMP_HELPERS 2013-11-15 09:32:22 +09:00
powerpc powerpc: book3s: kvm: Don't abuse host r2 in exit path 2013-12-18 11:29:31 +01:00
s390 Here are the 3.13 KVM changes. There was a lot of work on the PPC 2013-11-15 13:51:36 +09:00
score score: handle pgtable_page_ctor() fail 2013-11-15 09:32:18 +09:00
sh kernel: remove CONFIG_USE_GENERIC_SMP_HELPERS 2013-11-15 09:32:22 +09:00
sparc kernel: remove CONFIG_USE_GENERIC_SMP_HELPERS 2013-11-15 09:32:22 +09:00
tile kernel: remove CONFIG_USE_GENERIC_SMP_HELPERS 2013-11-15 09:32:22 +09:00
um um: handle pgtable_page_ctor() fail 2013-11-15 09:32:19 +09:00
unicore32 unicore32: handle pgtable_page_ctor() fail 2013-11-15 09:32:19 +09:00
x86 Here are the 3.13 KVM changes. There was a lot of work on the PPC 2013-11-15 13:51:36 +09:00
xtensa xtensa: use buddy allocator for PTE table 2013-11-15 09:32:19 +09:00
.gitignore
Kconfig kernel: remove CONFIG_USE_GENERIC_SMP_HELPERS 2013-11-15 09:32:22 +09:00