[bionic:linux-azure-4.15][PULL REQUEST] LP#1877425 - linux-azure: Enable FSGSBASE instructions to support SGX
Marcelo Henrique Cerri
marcelo.cerri at canonical.com
Fri May 15 19:11:39 UTC 2020
BugLink: http://bugs.launchpad.net/bugs/1877425
The following changes since commit cd6b58b95a2a23466b65e676e05bce3df6b32e33:
UBUNTU: Ubuntu-azure-4.15-4.15.0-1083.93 (2020-04-30 10:53:28 -0700)
are available in the Git repository at:
git://git.launchpad.net/~mhcerri/ubuntu/+source/linux/+git/azure azure-4.15-fsgsbase
for you to fetch changes up to 9c2fdd5054467fd7f4ab94b1fa938550d3e52e90:
UBUNTU: SAUCE: x86/elf: Enumerate kernel FSGSBASE capability in AT_HWCAP2 (2020-05-07 12:21:13 -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 (8):
x86/entry/64: Further improve paranoid_entry comments
selftests/x86/fsgsbase: Test RD/WRGSBASE
selftests/x86/fsgsbase: Fix some test case bugs
Revert "x86/ptrace: Prevent ptrace from clearing the FS/GS selector" and fix the test
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 (17):
x86/fsgsbase/64: Introduce FS/GS base helper functions
x86/fsgsbase/64: Make ptrace use the new FS/GS base helpers
x86/fsgsbase/64: Factor out FS/GS segment loading from __switch_to()
x86/segments/64: Rename the GDT PER_CPU entry to CPU_NUMBER
x86/vdso: Introduce helper functions for CPU and node number
x86/vdso: Initialize the CPU/node NR segment descriptor earlier
x86/fsgsbase/64: Fix the base write helper functions
selftests/x86/fsgsbase: Test ptracer-induced GSBASE write
selftests/x86/fsgsbase: Test ptracer-induced GSBASE write with FSGSBASE
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/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
Dave Hansen (1):
x86/entry: Add some paranoid entry/exit CR3 handling comments
Ingo Molnar (2):
x86/segments: Introduce the 'CPUNODE' naming to better document the segment limit CPU/node NR trick
x86/fsgsbase/64: Clean up various details
Tony Luck (1):
UBUNTU: SAUCE: x86/speculation/swapgs: Check FSGSBASE in enabling SWAPGS mitigation
Documentation/admin-guide/kernel-parameters.txt | 2 +
arch/x86/entry/calling.h | 40 ++++
arch/x86/entry/entry_64.S | 143 +++++++++---
arch/x86/entry/vdso/vgetcpu.c | 8 +-
arch/x86/entry/vdso/vma.c | 38 +---
arch/x86/include/asm/fsgsbase.h | 83 +++++++
arch/x86/include/asm/inst.h | 15 ++
arch/x86/include/asm/segment.h | 46 +++-
arch/x86/include/asm/vgtod.h | 26 ---
arch/x86/include/uapi/asm/hwcap2.h | 3 +
arch/x86/kernel/cpu/bugs.c | 6 +-
arch/x86/kernel/cpu/common.c | 46 ++++
arch/x86/kernel/process_64.c | 281 ++++++++++++++++++++----
arch/x86/kernel/ptrace.c | 75 +------
tools/testing/selftests/x86/fsgsbase.c | 225 +++++++++++++++++--
15 files changed, 798 insertions(+), 239 deletions(-)
create mode 100644 arch/x86/include/asm/fsgsbase.h
--
Regards,
Marcelo
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