ACK: [eoan:linux-azure][PULL REQUEST] LP#1877425 - linux-azure: Enable FSGSBASE instructions to support SGX
Ian May
ian.may at canonical.com
Fri May 15 22:16:59 UTC 2020
Acked-by: Ian May <ian.may at canonical.com>
On 5/15/20 2:12 PM, Marcelo Henrique Cerri wrote:
> BugLink: http://bugs.launchpad.net/bugs/1877425
>
> The following changes since commit 3dd1950d58c5be9d4bd210c45b25f046b7f0add5:
>
> UBUNTU: Ubuntu-azure-5.3.0-1020.21 (2020-04-08 16:31:44 +0800)
>
> are available in the Git repository at:
>
> git://git.launchpad.net/~mhcerri/ubuntu/+source/linux/+git/azure azure-5.3-fsgsbase
>
> for you to fetch changes up to f9320c39717ac036d4a011d9fd56340a4705db5a:
>
> UBUNTU: SAUCE: Documentation/x86/64: Add documentation for GS/FS addressing mode (2020-05-07 15:29:05 -0300)
>
> ----------------------------------------------------------------
> Andi Kleen (2):
> UBUNTU: SAUCE: x86/fsgsbase/64: Add intrinsics for FSGSBASE instructions
> UBUNTU: SAUCE: x86/elf: Enumerate kernel FSGSBASE capability in AT_HWCAP2
>
> Andy Lutomirski (4):
> UBUNTU: SAUCE: x86/cpu: Add 'unsafe_fsgsbase' to enable CR4.FSGSBASE
> UBUNTU: SAUCE: x86/entry/64: Clean up paranoid exit
> UBUNTU: SAUCE: x86/fsgsbase/64: Use FSGSBASE in switch_to() if available
> UBUNTU: SAUCE: x86/fsgsbase/64: Enable FSGSBASE on 64bit by default and add a chicken bit
>
> Chang S. Bae (9):
> UBUNTU: SAUCE: x86/ptrace: Prevent ptrace from clearing the FS/GS selector
> UBUNTU: SAUCE: selftests/x86/fsgsbase: Test GS selector on ptracer-induced GS base write
> UBUNTU: SAUCE: x86/entry/64: Switch CR3 before SWAPGS in paranoid entry
> UBUNTU: SAUCE: x86/entry/64: Introduce the FIND_PERCPU_BASE macro
> UBUNTU: SAUCE: x86/entry/64: Handle FSGSBASE enabled paranoid entry/exit
> UBUNTU: SAUCE: x86/entry/64: Document GSBASE handling in the paranoid path
> UBUNTU: SAUCE: x86/fsgsbase/64: Enable FSGSBASE instructions in helper functions
> UBUNTU: SAUCE: x86/fsgsbase/64: Use FSGSBASE instructions on thread copy and ptrace
> UBUNTU: SAUCE: selftests/x86/fsgsbase: Test ptracer-induced GS base write with FSGSBASE
>
> Thomas Gleixner (1):
> UBUNTU: SAUCE: Documentation/x86/64: Add documentation for GS/FS addressing mode
>
> Tony Luck (1):
> UBUNTU: SAUCE: x86/speculation/swapgs: Check FSGSBASE in enabling SWAPGS mitigation
>
> Documentation/admin-guide/kernel-parameters.txt | 2 +
> Documentation/x86/entry_64.rst | 9 ++
> Documentation/x86/x86_64/fsgs.rst | 199 ++++++++++++++++++++++++
> Documentation/x86/x86_64/index.rst | 1 +
> arch/x86/entry/calling.h | 40 +++++
> arch/x86/entry/entry_64.S | 134 ++++++++++++----
> arch/x86/include/asm/fsgsbase.h | 45 ++++--
> arch/x86/include/asm/inst.h | 15 ++
> arch/x86/include/uapi/asm/hwcap2.h | 3 +
> arch/x86/kernel/cpu/bugs.c | 6 +-
> arch/x86/kernel/cpu/common.c | 22 +++
> arch/x86/kernel/process_64.c | 107 +++++++++++--
> arch/x86/kernel/ptrace.c | 14 +-
> tools/testing/selftests/x86/fsgsbase.c | 24 ++-
> 14 files changed, 549 insertions(+), 72 deletions(-)
> create mode 100644 Documentation/x86/x86_64/fsgs.rst
>
>
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