feat(pmu): introduce pmuv3 lib/extensions folder
The enablement code for the PMU is scattered and difficult to track
down. Factor out the feature into its own lib/extensions folder and
consolidate the implementation. Treat it is as an architecturally
mandatory feature as it is currently.
Additionally, do some cleanup on AArch64. Setting overflow bits in
PMCR_EL0 is irrelevant for firmware so don't do it. Then delay the PMU
initialisation until the context management stage which simplifies the
early environment assembly. One side effect is that the PMU might count
before this happens so reset all counters to 0 to prevent any leakage.
Finally, add an enable to manage_extensions_realm() as realm world uses
the pmu. This introduces the HPMN fixup to realm world.
Signed-off-by: Boyan Karatotev <boyan.karatotev@arm.com>
Change-Id: Ie13a8625820ecc5fbfa467dc6ca18025bf6a9cd3
diff --git a/include/arch/aarch64/arch.h b/include/arch/aarch64/arch.h
index f3b1ca5..0af7c83 100644
--- a/include/arch/aarch64/arch.h
+++ b/include/arch/aarch64/arch.h
@@ -221,6 +221,12 @@
#define ID_AA64DFR0_TRACEFILT_MASK U(0xf)
#define ID_AA64DFR0_TRACEFILT_SUPPORTED U(1)
#define ID_AA64DFR0_TRACEFILT_LENGTH U(4)
+#define ID_AA64DFR0_PMUVER_LENGTH U(4)
+#define ID_AA64DFR0_PMUVER_SHIFT U(8)
+#define ID_AA64DFR0_PMUVER_MASK U(0xf)
+#define ID_AA64DFR0_PMUVER_PMUV3 U(1)
+#define ID_AA64DFR0_PMUVER_PMUV3P7 U(7)
+#define ID_AA64DFR0_PMUVER_IMP_DEF U(0xf)
/* ID_AA64DFR0_EL1.PMS definitions (for ARMv8.2+) */
#define ID_AA64DFR0_PMS_SHIFT U(32)
@@ -599,12 +605,12 @@
/* MDCR_EL2 definitions */
#define MDCR_EL2_MTPME (U(1) << 28)
-#define MDCR_EL2_HLP (U(1) << 26)
+#define MDCR_EL2_HLP_BIT (U(1) << 26)
#define MDCR_EL2_E2TB(x) ((x) << 24)
#define MDCR_EL2_E2TB_EL1 U(0x3)
-#define MDCR_EL2_HCCD (U(1) << 23)
+#define MDCR_EL2_HCCD_BIT (U(1) << 23)
#define MDCR_EL2_TTRF (U(1) << 19)
-#define MDCR_EL2_HPMD (U(1) << 17)
+#define MDCR_EL2_HPMD_BIT (U(1) << 17)
#define MDCR_EL2_TPMS (U(1) << 14)
#define MDCR_EL2_E2PB(x) ((x) << 12)
#define MDCR_EL2_E2PB_EL1 U(0x3)
@@ -615,6 +621,7 @@
#define MDCR_EL2_HPME_BIT (U(1) << 7)
#define MDCR_EL2_TPM_BIT (U(1) << 6)
#define MDCR_EL2_TPMCR_BIT (U(1) << 5)
+#define MDCR_EL2_HPMN_MASK U(0x1f)
#define MDCR_EL2_RESET_VAL U(0x0)
/* HSTR_EL2 definitions */