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

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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
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hypervisor/arch/x86/cat.c
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@@ -37,7 +37,7 @@ int32_t init_cat_cap_info(void)
cat_cap_info.res_id = CAT_RESID_L2;
}
cat_cap_info.support = true;
cat_cap_info.enabled = true;
/* CPUID.(EAX=0x10,ECX=ResID):EAX[4:0] reports the length of CBM supported
* CPUID.(EAX=0x10,ECX=ResID):EBX[31:0] indicates the corresponding uints