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HV: Add both HW and SW checks for RDT support

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There can be times when user unknowinlgy enables
CONFIG_CAT_ENBALED SW flag, but the hardware might
not support L3 or L2 CAT. In such case software can
end up writing to the CAT MSRs which can cause
undefined results. The patch fixes the issue by
enabling CAT only when both HW as well software
via the CONFIG_CAT_ENABLED supports CAT.

The patch also address typo with "clos2prq_msr"
function name. It should be "clos2pqr_msr" instead.
PQR stands for platform qos register.

Tracked-On: #3715
Signed-off-by: Vijay Dhanraj <vijay.dhanraj@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Vijay Dhanraj
2020-02-17 12:19:48 -08:00
committed by wenlingz
parent b8a021d658
commit 887e3813bc
4 changed files with 42 additions and 29 deletions
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5
hypervisor/include/arch/x86/rdt.h
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@@ -19,12 +19,15 @@ struct cat_hw_info {
extern struct cat_hw_info cat_cap_info;
extern const uint16_t hv_clos;
extern uint16_t platform_clos_num;
void setup_clos(uint16_t pcpu_id);
#define CAT_RESID_L3 1U
#define CAT_RESID_L2 2U
int32_t init_cat_cap_info(void);
uint64_t clos2prq_msr(uint16_t clos);
uint64_t clos2pqr_msr(uint16_t clos);
bool is_platform_rdt_capable(void);
#endif /* RDT_H */