# git rev-parse -q --verify 50087112592016a3fc10b394a55f1f1a1bde6908^{commit}
50087112592016a3fc10b394a55f1f1a1bde6908
already have revision, skipping fetch
# git checkout -q -f -B kisskb 50087112592016a3fc10b394a55f1f1a1bde6908
# git clean -qxdf
# < git log -1
# commit 50087112592016a3fc10b394a55f1f1a1bde6908
# Author: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
# Date:   Thu Jun 20 11:46:49 2019 +1000
# 
#     KVM: PPC: Book3S HV: Invalidate ERAT when flushing guest TLB entries
#     
#     When a guest vcpu moves from one physical thread to another it is
#     necessary for the host to perform a tlb flush on the previous core if
#     another vcpu from the same guest is going to run there. This is because the
#     guest may use the local form of the tlb invalidation instruction meaning
#     stale tlb entries would persist where it previously ran. This is handled
#     on guest entry in kvmppc_check_need_tlb_flush() which calls
#     flush_guest_tlb() to perform the tlb flush.
#     
#     Previously the generic radix__local_flush_tlb_lpid_guest() function was
#     used, however the functionality was reimplemented in flush_guest_tlb()
#     to avoid the trace_tlbie() call as the flushing may be done in real
#     mode. The reimplementation in flush_guest_tlb() was missing an erat
#     invalidation after flushing the tlb.
#     
#     This lead to observable memory corruption in the guest due to the
#     caching of stale translations. Fix this by adding the erat invalidation.
#     
#     Fixes: 70ea13f6e609 ("KVM: PPC: Book3S HV: Flush TLB on secondary radix threads")
#     Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
# < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-ld --version
# < git log --format=%s --max-count=1 50087112592016a3fc10b394a55f1f1a1bde6908
# < make -s -j 24 ARCH=x86 O=/kisskb/build/powerpc-fixes_x86-allmodconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-  allmodconfig
# Added to kconfig CONFIG_BUILD_DOCSRC=n
# Added to kconfig CONFIG_MODULE_SIG=n
# Added to kconfig CONFIG_SAMPLES=n
# yes \n | make -s -j 24 ARCH=x86 O=/kisskb/build/powerpc-fixes_x86-allmodconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-  oldconfig
yes: standard output: Broken pipe
# make -s -j 24 ARCH=x86 O=/kisskb/build/powerpc-fixes_x86-allmodconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-  
/kisskb/src/fs/btrfs/props.c: In function 'inherit_props':
/kisskb/src/fs/btrfs/props.c:389:4: warning: 'num_bytes' may be used uninitialized in this function [-Wmaybe-uninitialized]
    btrfs_block_rsv_release(fs_info, trans->block_rsv,
    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      num_bytes);
      ~~~~~~~~~~
warning: same module names found:
  drivers/regulator/88pm800.ko
  drivers/mfd/88pm800.ko
warning: same module names found:
  drivers/gpu/drm/bridge/adv7511/adv7511.ko
  drivers/media/i2c/adv7511.ko
warning: same module names found:
  drivers/net/phy/asix.ko
  drivers/net/usb/asix.ko
warning: same module names found:
  fs/coda/coda.ko
  drivers/media/platform/coda/coda.ko
warning: same module names found:
  drivers/net/phy/realtek.ko
  drivers/net/dsa/realtek.ko
Completed OK
# rm -rf /kisskb/build/powerpc-fixes_x86-allmodconfig_x86_64-gcc8
# Build took: 0:29:11.107137