On 2024/12/20 15:53, Yicong Yang wrote:
> From: Yicong Yang
>
> Currently if architectures want to support HOTPLUG_SMT they need to
> provide a topology_is_primary_thread() telling the framework which
> thread in the SMT cannot offline. However arm64 doesn't have a
> restriction on which thread i
From: Yicong Yang
For ACPI we'll build the topology from PPTT and we cannot directly
get the SMT number of each core. Instead using a temporary xarray
to record the heterogeneous information (from ACPI_PPTT_ACPI_IDENTICAL)
and SMT information of the first core in its heterogeneous CPU cluster
whe
From: Yicong Yang
On building the topology from the devicetree, we've already
gotten the SMT thread number of each core. Update the largest
SMT thread number and enable the SMT control by the end of
topology parsing.
The core's SMT control provides two interface to the users [1]:
1) enable/disab
From: Yicong Yang
Currently if architectures want to support HOTPLUG_SMT they need to
provide a topology_is_primary_thread() telling the framework which
thread in the SMT cannot offline. However arm64 doesn't have a
restriction on which thread in the SMT cannot offline, a simplest
choice is that
From: Yicong Yang
The core CPU control framework supports runtime SMT control which
is not yet supported on arm64. Besides the general vulnerabilities
concerns we want this runtime control on our arm64 server for:
- better single CPU performance in some cases
- saving overall power consumption
From: Yicong Yang
Enable HOTPLUG_SMT for SMT control.
Signed-off-by: Yicong Yang
---
arch/arm64/Kconfig | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 100570a048c5..1ee926e2252e 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -246,
allnoconfiggcc-13.2.0
arc allyesconfiggcc-13.2.0
arc randconfig-001-20241218gcc-13.2.0
arc randconfig-001-20241219gcc-13.2.0
arc randconfig-002-20241218gcc-13.2.0
arc
randconfig-001-20241219clang-18
powerpcrandconfig-002-20241218clang-15
powerpcrandconfig-002-20241219clang-16
powerpcrandconfig-003-20241218clang-17
powerpcrandconfig-003-20241219clang-20
powerpc64 randconfig-001-20241219gcc-14.2.0
powerpc64 randconfig-002
