Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.
Like Xu
authored
HSW_IN_TX* bits are used in generic code which are not supported on AMD. Worse, these bits overlap with AMD EventSelect[11:8] and hence using HSW_IN_TX* bits unconditionally in generic code is resulting in unintentional pmu behavior on AMD. For example, if EventSelect[11:8] is 0x2, pmc_reprogram_counter() wrongly assumes that HSW_IN_TX_CHECKPOINTED is set and thus forces sampling period to be 0. Also per the SDM, both bits 32 and 33 "may only be set if the processor supports HLE or RTM" and for "IN_TXCP (bit 33): this bit may only be set for IA32_PERFEVTSEL2." Opportunistically eliminate code redundancy, because if the HSW_IN_TX* bit is set in pmc->eventsel, it is already set in attr.config. Reported-by:Ravi Bangoria <ravi.bangoria@amd.com> Reported-by:
Jim Mattson <jmattson@google.com> Fixes: 103af0a9 ("perf, kvm: Support the in_tx/in_tx_cp modifiers in KVM arch perfmon emulation v5") Co-developed-by:
Like Xu <likexu@tencent.com> Message-Id: <20220309084257.88931-1-likexu@tencent.com> Signed-off-by:
Paolo Bonzini <pbonzini@redhat.com>
| Name | Last commit | Last update |
|---|---|---|
| Documentation | ||
| LICENSES | ||
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README |