[PATCH v2 17/20] KVM: arm64: Remove all traces of FEAT_TME
From: Marc Zyngier <maz@kernel.org>
Date: 2026-02-02 18:44:08
Also in:
kvm, kvmarm
Subsystem:
arm64 port (aarch64 architecture), kernel selftest framework, kernel virtual machine (kvm), kernel virtual machine for arm64 (kvm/arm64), performance events subsystem, the rest · Maintainers:
Catalin Marinas, Will Deacon, Shuah Khan, Shuah Khan, Paolo Bonzini, Marc Zyngier, Oliver Upton, Peter Zijlstra, Ingo Molnar, Arnaldo Carvalho de Melo, Namhyung Kim, Linus Torvalds
FEAT_TME has been dropped from the architecture. Retrospectively. I'm sure someone is crying somewhere, but most of us won't. Clean-up time. Reviewed-by: Fuad Tabba <redacted> Signed-off-by: Marc Zyngier <maz@kernel.org> --- arch/arm64/kvm/config.c | 7 ------- arch/arm64/kvm/nested.c | 5 ----- arch/arm64/tools/sysreg | 12 +++--------- tools/perf/Documentation/perf-arm-spe.txt | 1 - tools/testing/selftests/kvm/arm64/set_id_regs.c | 1 - 5 files changed, 3 insertions(+), 23 deletions(-)
diff --git a/arch/arm64/kvm/config.c b/arch/arm64/kvm/config.c
index b37b40744db94..c1b76a76a5e4e 100644
--- a/arch/arm64/kvm/config.c
+++ b/arch/arm64/kvm/config.c@@ -187,7 +187,6 @@ struct reg_feat_map_desc { #define FEAT_RME ID_AA64PFR0_EL1, RME, IMP #define FEAT_MPAM ID_AA64PFR0_EL1, MPAM, 1 #define FEAT_S2FWB ID_AA64MMFR2_EL1, FWB, IMP -#define FEAT_TME ID_AA64ISAR0_EL1, TME, IMP #define FEAT_TWED ID_AA64MMFR1_EL1, TWED, IMP #define FEAT_E2H0 ID_AA64MMFR4_EL1, E2H0, IMP #define FEAT_SRMASK ID_AA64MMFR4_EL1, SRMASK, IMP
@@ -991,7 +990,6 @@ static const struct reg_bits_to_feat_map hcr_feat_map[] = { NEEDS_FEAT(HCR_EL2_FIEN, feat_rasv1p1), NEEDS_FEAT(HCR_EL2_GPF, FEAT_RME), NEEDS_FEAT(HCR_EL2_FWB, FEAT_S2FWB), - NEEDS_FEAT(HCR_EL2_TME, FEAT_TME), NEEDS_FEAT(HCR_EL2_TWEDEL | HCR_EL2_TWEDEn, FEAT_TWED),
@@ -1102,11 +1100,6 @@ static const struct reg_bits_to_feat_map sctlr_el1_feat_map[] = { NEEDS_FEAT(SCTLR_EL1_EnRCTX, FEAT_SPECRES), NEEDS_FEAT(SCTLR_EL1_DSSBS, FEAT_SSBS), NEEDS_FEAT(SCTLR_EL1_TIDCP, FEAT_TIDCP1), - NEEDS_FEAT(SCTLR_EL1_TME0 | - SCTLR_EL1_TME | - SCTLR_EL1_TMT0 | - SCTLR_EL1_TMT, - FEAT_TME), NEEDS_FEAT(SCTLR_EL1_TWEDEL | SCTLR_EL1_TWEDEn, FEAT_TWED),
diff --git a/arch/arm64/kvm/nested.c b/arch/arm64/kvm/nested.c
index 75a23f1c56d13..96e899dbd9192 100644
--- a/arch/arm64/kvm/nested.c
+++ b/arch/arm64/kvm/nested.c@@ -1505,11 +1505,6 @@ u64 limit_nv_id_reg(struct kvm *kvm, u32 reg, u64 val) u64 orig_val = val; switch (reg) { - case SYS_ID_AA64ISAR0_EL1: - /* Support everything but TME */ - val &= ~ID_AA64ISAR0_EL1_TME; - break; - case SYS_ID_AA64ISAR1_EL1: /* Support everything but LS64 and Spec Invalidation */ val &= ~(ID_AA64ISAR1_EL1_LS64 |
diff --git a/arch/arm64/tools/sysreg b/arch/arm64/tools/sysreg
index 969a75615d612..650d7d477087e 100644
--- a/arch/arm64/tools/sysreg
+++ b/arch/arm64/tools/sysreg@@ -1856,10 +1856,7 @@ UnsignedEnum 31:28 RDM 0b0000 NI 0b0001 IMP EndEnum -UnsignedEnum 27:24 TME - 0b0000 NI - 0b0001 IMP -EndEnum +Res0 27:24 UnsignedEnum 23:20 ATOMIC 0b0000 NI 0b0010 IMP
@@ -2432,10 +2429,7 @@ Field 57 EPAN Field 56 EnALS Field 55 EnAS0 Field 54 EnASR -Field 53 TME -Field 52 TME0 -Field 51 TMT -Field 50 TMT0 +Res0 53:50 Field 49:46 TWEDEL Field 45 TWEDEn Field 44 DSSBS
@@ -3840,7 +3834,7 @@ Field 43 NV1 Field 42 NV Field 41 API Field 40 APK -Field 39 TME +Res0 39 Field 38 MIOCNCE Field 37 TEA Field 36 TERR
diff --git a/tools/perf/Documentation/perf-arm-spe.txt b/tools/perf/Documentation/perf-arm-spe.txt
index 8b02e5b983fa9..201a82bec0de4 100644
--- a/tools/perf/Documentation/perf-arm-spe.txt
+++ b/tools/perf/Documentation/perf-arm-spe.txt@@ -176,7 +176,6 @@ and inv_event_filter are: bit 10 - Remote access (FEAT_SPEv1p4) bit 11 - Misaligned access (FEAT_SPEv1p1) bit 12-15 - IMPLEMENTATION DEFINED events (when implemented) - bit 16 - Transaction (FEAT_TME) bit 17 - Partial or empty SME or SVE predicate (FEAT_SPEv1p1) bit 18 - Empty SME or SVE predicate (FEAT_SPEv1p1) bit 19 - L2D access (FEAT_SPEv1p4)
diff --git a/tools/testing/selftests/kvm/arm64/set_id_regs.c b/tools/testing/selftests/kvm/arm64/set_id_regs.c
index c4815d3658167..73de5be58bab0 100644
--- a/tools/testing/selftests/kvm/arm64/set_id_regs.c
+++ b/tools/testing/selftests/kvm/arm64/set_id_regs.c@@ -91,7 +91,6 @@ static const struct reg_ftr_bits ftr_id_aa64isar0_el1[] = { REG_FTR_BITS(FTR_LOWER_SAFE, ID_AA64ISAR0_EL1, SM3, 0), REG_FTR_BITS(FTR_LOWER_SAFE, ID_AA64ISAR0_EL1, SHA3, 0), REG_FTR_BITS(FTR_LOWER_SAFE, ID_AA64ISAR0_EL1, RDM, 0), - REG_FTR_BITS(FTR_LOWER_SAFE, ID_AA64ISAR0_EL1, TME, 0), REG_FTR_BITS(FTR_LOWER_SAFE, ID_AA64ISAR0_EL1, ATOMIC, 0), REG_FTR_BITS(FTR_LOWER_SAFE, ID_AA64ISAR0_EL1, CRC32, 0), REG_FTR_BITS(FTR_LOWER_SAFE, ID_AA64ISAR0_EL1, SHA2, 0),
--
2.47.3