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Subject[GIT PULL] x86/urgent for v5.11-rc7
Hi Linus,

I hope this is the last batch of x86/urgent updates for this round.

Pls pull,


The following changes since commit 6ee1d745b7c9fd573fba142a2efdad76a9f1cb04:

Linux 5.11-rc5 (2021-01-24 16:47:14 -0800)

are available in the Git repository at:

git:// tags/x86_urgent_for_v5.11_rc7

for you to fetch changes up to 816ef8d7a2c4182e19bc06ab65751cb9e3951e94:

x86/efi: Remove EFI PGD build time checks (2021-02-06 13:54:14 +0100)

- Remove superfluous EFI PGD range checks which lead to those assertions failing
with certain kernel configs and LLVM.

- Disable setting breakpoints on facilities involved in #DB exception handling
to avoid infinite loops.

- Add extra serialization to non-serializing MSRs (IA32_TSC_DEADLINE and
x2 APIC MSRs) to adhere to SDM's recommendation and avoid any theoretical

- Re-add the EPB MSR reading on turbostat so that it works on older
kernels which don't have the corresponding EPB sysfs file.

- Add Alder Lake to the list of CPUs which support split lock.

- Fix %dr6 register handling in order to be able to set watchpoints with gdb

- Disable CET instrumentation in the kernel so that gcc doesn't add
ENDBR64 to kernel code and thus confuse tracing.

Borislav Petkov (2):
tools/power/turbostat: Fallback to an MSR read for EPB
x86/efi: Remove EFI PGD build time checks

Dave Hansen (1):
x86/apic: Add extra serialization for non-serializing MSRs

Fenghua Yu (1):
x86/split_lock: Enable the split lock feature on another Alder Lake CPU

Josh Poimboeuf (1):
x86/build: Disable CET instrumentation in the kernel

Lai Jiangshan (2):
x86/debug: Prevent data breakpoints on __per_cpu_offset
x86/debug: Prevent data breakpoints on cpu_dr7

Peter Zijlstra (1):
x86/debug: Fix DR6 handling

Makefile | 6 ----
arch/x86/Makefile | 3 ++
arch/x86/include/asm/apic.h | 10 ------
arch/x86/include/asm/barrier.h | 18 +++++++++++
arch/x86/kernel/apic/apic.c | 4 +++
arch/x86/kernel/apic/x2apic_cluster.c | 6 ++--
arch/x86/kernel/apic/x2apic_phys.c | 9 ++++--
arch/x86/kernel/cpu/intel.c | 1 +
arch/x86/kernel/hw_breakpoint.c | 61 +++++++++++++++++++++++------------
arch/x86/platform/efi/efi_64.c | 19 -----------
tools/power/x86/turbostat/turbostat.c | 10 +++++-
11 files changed, 85 insertions(+), 62 deletions(-)


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