github/acrn-hypervisor
1
0
Fork 0
mirror of https://github.com/projectacrn/acrn-hypervisor.git synced 2025-09-22 09:17:58 +00:00
Code Issues Projects Releases Wiki Activity

hv: CAT is supposed to be enabled in the system level

Browse Source 
In platforms that support CAT, when it is enabled by ACRN, i.e.
IA32_resourceType_MASK_n registers are programmed with customized values,
it has impacts to the whole system.

The per guest flag GUEST_FLAG_CLOS_REQUIRED suggests that CAT may be
enabled in some guests, but not in others who don't have this flag,
which is conceptually incorrect.

This patch removes GUEST_FLAG_CLOS_REQUIRED, and adds a new Kconfig
entry CAT_ENABLED for CAT enabling. When it's enabled, platform_clos_array[]
defines a set of system-wide Class of Service (COS, or CLOS), and the
per guest vm_configs[].clos associates the guest with particular CLOS.

Tracked-On: #2462
Signed-off-by: Zide Chen <zide.chen@intel.com>
This commit is contained in:
Zide Chen
2020-02-05 10:23:07 -08:00
committed by wenlingz
parent 8dcede7693
commit cc6f094926
7 changed files with 21 additions and 14 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
hypervisor/arch/x86/Kconfig
View File

@@ -244,6 +244,14 @@ config HYPERV_ENABLED
When set, the minimum set of TLFS functionality together with some
performance enlightenments are enabled.
config CAT_ENABLED
bool "Enable CAT (Cache Allocation Technology)"
default n
help
When set in platforms that support CAT, hypervisor can allocate
various amount of last-level-cache (LLC) resources to VMs to achieve
different Class of Service (COS, or CLOS).
config GPU_SBDF
hex "Segment, Bus, Device, and function of the GPU"
depends on ACPI_PARSE_ENABLED