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TSX suspend load tracking instruction is supported by the Intel uarch Sapphire Rapids. It aims to give a way to choose which memory accesses do not need to be tracked in the TSX read set. It's availability is indicated as CPUID.(EAX=7,ECX=0):EDX[bit 16]. Expose TSX Suspend Load Address Tracking feature in KVM CPUID, so KVM could pass this information to guests and they can make use of this feature accordingly. Signed-off-by: Cathy Zhang <cathy.zhang@intel.com> Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Tony Luck <tony.luck@intel.com> Link: https://lkml.kernel.org/r/1598316478-23337-3-git-send-email-cathy.zhang@intel.com |
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