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authorMarc Zyngier <maz@kernel.org>2021-02-08 09:57:15 +0000
committerWill Deacon <will@kernel.org>2021-02-09 13:47:11 +0000
commitc6f8c92f3f368d345c38aea5cc0e60515bcb159e (patch)
treee138e4705e17f09c904d61ece0ca90202d248ec9 /tools/perf/scripts/python/exported-sql-viewer.py
parent0c93df9622d4d921bcd0dc83f71fed9e98f5119f (diff)
arm64: Drop early setting of MDSCR_EL2.TPMS
When running VHE, we set MDSCR_EL2.TPMS very early on to force the trapping of EL1 SPE accesses to EL2. However: - we are running with HCR_EL2.{E2H,TGE}={1,1}, meaning that there is no EL1 to trap from - before entering a guest, we call kvm_arm_setup_debug(), which sets MDCR_EL2_TPMS in the per-vcpu shadow mdscr_el2, which gets applied on entry by __activate_traps_common(). The early setting of MDSCR_EL2.TPMS is therefore useless and can be dropped. Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20210208095732.3267263-7-maz@kernel.org Signed-off-by: Will Deacon <will@kernel.org>
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