perf enahancements for ppc64

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------- Comment From <email address hidden> 2016-02-02 10:19 EDT-------
Patches are still under review.

------- Comment From <email address hidden> 2016-02-08 03:37 EDT-------
Patches for guest exit statistics (perf kvm stat record/report) have made into upstream :
https://lists.ozlabs.org/pipermail/linuxppc-dev/2016-January/138563.html

I understand that this bug is ready for Canonical consumption.

Breno - it is not clear to me to which patches you refer. I found these patches in linux-next:

perf kvm/{x86,s390}: Remove dependency on uapi/kvm_perf.h
perf kvm/{x86,s390}: Remove const from kvm_events_tp
perf kvm/powerpc: Port perf kvm stat to powerpc
perf kvm/powerpc: Add support for HCALL reasons

------- Comment From <email address hidden> 2016-02-08 11:58 EDT-------
> Breno - it is not clear to me to which patches you refer. I found these
> patches in linux-next:
Hello Tim, Sorry, the patches required to be included is, in fact, confusing.

> perf kvm/{x86,s390}: Remove dependency on uapi/kvm_perf.h
> perf kvm/{x86,s390}: Remove const from kvm_events_tp
> perf kvm/powerpc: Port perf kvm stat to powerpc
> perf kvm/powerpc: Add support for HCALL reasons

I understand that all of them might be part of the same feature (fix perf kvm stat), but I would prefer Hemant to confirm.

------- Comment From <email address hidden> 2016-02-09 00:21 EDT-------
(In reply to comment #14)
> > Breno - it is not clear to me to which patches you refer. I found these
> > patches in linux-next:
> Hello Tim, Sorry, the patches required to be included is, in fact, confusing.
>
> > perf kvm/{x86,s390}: Remove dependency on uapi/kvm_perf.h
> > perf kvm/{x86,s390}: Remove const from kvm_events_tp
> > perf kvm/powerpc: Port perf kvm stat to powerpc
> > perf kvm/powerpc: Add support for HCALL reasons
>
> I understand that all of them might be part of the same feature (fix perf
> kvm stat), but I would prefer Hemant to confirm.

The above patches are needed for this feauture (all of them). These commits are from linux-next :
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git

78e6c39b231a8e31e193534fdbe29291b7fd8f37 perf kvm/powerpc: Add support for HCALL reasons
066d3593e1b14690dc1131d50cacbb0b7eb3f160 perf kvm/powerpc: Port perf kvm stat to powerpc
48deaa74fcdad516a94fe38a4af706747d9e4745 perf kvm/{x86,s390}: Remove const from kvm_events_tp
162607ea20fafb4a76234ebe4314cd733345482e perf kvm/{x86,s390}: Remove dependency on uapi/kvm_perf.h

Applied

This bug was fixed in the package linux - 4.4.0-6.21

---------------
linux (4.4.0-6.21) xenial; urgency=low

  [ Tim Gardner ]

  * Release Tracking Bug
    - LP: #1546283

  * Naples/Zen, NTB Driver (LP: #1542071)
    - [Config] CONFIG_NTB_AMD=m
    - NTB: Add support for AMD PCI-Express Non-Transparent Bridge

  * [Hyper-V] kernel panic occurs when installing Ubuntu Server x32 (LP: #1495983)
    - SAUCE: storvsc: use small sg_tablesize on x86

  * Enable arm64 emulation of removed ARMv7 instructions (LP: #1545542)
    - [Config] CONFIG_ARMV8_DEPRECATED=y

  * Surelock-GA2:kernel panic/ exception @ pcibios_set_pcie_reset_state+0x118/0x280 + cxl_reset+0x5c/0xc0 (LP: #1545037)
    - powerpc/eeh: Fix stale cached primary bus

  * Miscellaneous Ubuntu changes
    - SAUCE: fs: Add user namesapace member to struct super_block
    - SAUCE: fs: Limit file caps to the user namespace of the super block
    - SAUCE: Smack: Add support for unprivileged mounts from user namespaces
    - SAUCE: block_dev: Support checking inode permissions in lookup_bdev()
    - SAUCE: block_dev: Check permissions towards block device inode when mounting
    - SAUCE: fs: Treat foreign mounts as nosuid
    - SAUCE: selinux: Add support for unprivileged mounts from user namespaces
    - SAUCE: userns: Replace in_userns with current_in_userns
    - SAUCE: Smack: Handle labels consistently in untrusted mounts
    - SAUCE: fs: Check for invalid i_uid in may_follow_link()
    - SAUCE: cred: Reject inodes with invalid ids in set_create_file_as()
    - SAUCE: fs: Refuse uid/gid changes which don't map into s_user_ns
    - SAUCE: fs: Update posix_acl support to handle user namespace mounts
    - SAUCE: fs: Ensure the mounter of a filesystem is privileged towards its inodes
    - SAUCE: fs: Don't remove suid for CAP_FSETID in s_user_ns
    - SAUCE: fs: Allow superblock owner to access do_remount_sb()
    - SAUCE: capabilities: Allow privileged user in s_user_ns to set security.* xattrs
    - SAUCE: fuse: Add support for pid namespaces
    - SAUCE: fuse: Support fuse filesystems outside of init_user_ns
    - SAUCE: fuse: Restrict allow_other to the superblock's namespace or a descendant
    - SAUCE: fuse: Allow user namespace mounts
    - SAUCE: mtd: Check permissions towards mtd block device inode when mounting
    - SAUCE: fs: Update i_[ug]id_(read|write) to translate relative to s_user_ns
    - SAUCE: quota: Convert ids relative to s_user_ns
    - SAUCE: evm: Translate user/group ids relative to s_user_ns when computing HMAC
    - SAUCE: fs: Allow CAP_SYS_ADMIN in s_user_ns to freeze and thaw filesystems
    - SAUCE: quota: Treat superblock owner as privilged
    - SAUCE: ima/evm: Allow root in s_user_ns to set xattrs
    - SAUCE: block_dev: Forbid unprivileged mounting when device is opened for writing
    - SAUCE: ext4: Add support for unprivileged mounts from user namespaces
    - SAUCE: ext4: Add module parameter to enable user namespace mounts
    - SAUCE: fuse: Add module parameter to enable user namespace mounts

  * Miscellaneous upstream changes
    - megaraid: Fix possible NULL pointer deference in mraid_mm_ioctl
    - libahci: Implement the capability to override th...