Merge pull request #1846 from loumay-arm/lm/mpam
MPAM: enable MPAM EL2 traps
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commit
82842004f6
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@ -783,6 +783,10 @@
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/* MPAM register definitions */
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#define MPAM3_EL3_MPAMEN_BIT (ULL(1) << 63)
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#define MPAMHCR_EL2_TRAP_MPAMIDR_EL1 (ULL(1) << 31)
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#define MPAM2_EL2_TRAPMPAM0EL1 (ULL(1) << 49)
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#define MPAM2_EL2_TRAPMPAM1EL1 (ULL(1) << 48)
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#define MPAMIDR_HAS_HCR_BIT (ULL(1) << 17)
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@ -31,11 +31,19 @@ void mpam_enable(bool el2_unused)
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/*
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* If EL2 is implemented but unused, disable trapping to EL2 when lower
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* ELs access their own MPAM registers.
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* If EL2 is implemented and used, enable trapping to EL2.
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*/
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if (el2_unused) {
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write_mpam2_el2(0);
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if ((read_mpamidr_el1() & MPAMIDR_HAS_HCR_BIT) != 0U)
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write_mpamhcr_el2(0);
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} else {
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write_mpam2_el2(MPAM2_EL2_TRAPMPAM0EL1 |
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MPAM2_EL2_TRAPMPAM1EL1);
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if ((read_mpamidr_el1() & MPAMIDR_HAS_HCR_BIT) != 0U) {
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write_mpamhcr_el2(MPAMHCR_EL2_TRAP_MPAMIDR_EL1);
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}
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}
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}
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