This series adds fine grained trap control in EL2 required for FEAT_PMUv3p9 registers like PMICNTR_EL0, PMICFILTR_EL0, and PMUACR_EL1 which are already being used in the kernel. This is required to prevent their EL1 access trap into EL2.
The following commits that enabled access into FEAT_PMUv3p9 registers have already been merged upstream from 6.12 onwards.
d8226d8cfbaf ("perf: arm_pmuv3: Add support for Armv9.4 PMU instruction counter") 0bbff9ed8165 ("perf/arm_pmuv3: Add PMUv3.9 per counter EL0 access control")
The sysreg patches in this series are required for the final patch which fixes the actual problem.
Changes in V2:
- Dropped [PATCH 1/8] perf/arm_pmuv3: Add PMUv3.9 per counter EL0 access control - Folded ID_AA64DFR0_EL1_PMUVer_V3P9 definition in arch/arm64/tools/sysreg which was added in commit 0bbff9ed8165 ("perf/arm_pmuv3: Add PMUv3.9 per counter EL0 access control")
Anshuman Khandual (7): arm64/sysreg: Update register fields for ID_AA64MMFR0_EL1 arm64/sysreg: Add register fields for HDFGRTR2_EL2 arm64/sysreg: Add register fields for HDFGWTR2_EL2 arm64/sysreg: Add register fields for HFGITR2_EL2 arm64/sysreg: Add register fields for HFGRTR2_EL2 arm64/sysreg: Add register fields for HFGWTR2_EL2 arm64/boot: Enable EL2 requirements for FEAT_PMUv3p9
Documentation/arch/arm64/booting.rst | 22 ++++++ arch/arm64/include/asm/el2_setup.h | 25 +++++++ arch/arm64/tools/sysreg | 104 +++++++++++++++++++++++++++ 3 files changed, 151 insertions(+)
This updates ID_AA64MMFR0_EL1 register fields as per the definitions based on DDI0601 2024-12.
Cc: Will Deacon will@kernel.org Cc: Mark Brown broonie@kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org Reviewed-by: Eric Auger eric.auger@redhat.com Reviewed-by: Mark Brown broonie@kernel.org Signed-off-by: Anshuman Khandual anshuman.khandual@arm.com Link: https://lore.kernel.org/r/20250203050828.1049370-2-anshuman.khandual@arm.com Signed-off-by: Catalin Marinas catalin.marinas@arm.com (cherry picked from commit cc15f548cc77574bcd68425ae01a796659bd3705) Signed-off-by: Anshuman Khandual anshuman.khandual@arm.com --- arch/arm64/tools/sysreg | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/arch/arm64/tools/sysreg b/arch/arm64/tools/sysreg index 8d637ac4b7c6..41b0e54515eb 100644 --- a/arch/arm64/tools/sysreg +++ b/arch/arm64/tools/sysreg @@ -1556,6 +1556,7 @@ EndEnum UnsignedEnum 59:56 FGT 0b0000 NI 0b0001 IMP + 0b0010 FGT2 EndEnum Res0 55:48 UnsignedEnum 47:44 EXS @@ -1617,6 +1618,7 @@ Enum 3:0 PARANGE 0b0100 44 0b0101 48 0b0110 52 + 0b0111 56 EndEnum EndSysreg
[ Sasha's backport helper bot ]
Hi,
Summary of potential issues: ⚠️ Found matching upstream commit but patch is missing proper reference to it
Found matching upstream commit: cc15f548cc77574bcd68425ae01a796659bd3705
Status in newer kernel trees: 6.14.y | Not found 6.13.y | Not found
Note: The patch differs from the upstream commit: --- 1: cc15f548cc775 ! 1: 25eca6f65b94d arm64/sysreg: Update register fields for ID_AA64MMFR0_EL1 @@ Commit message Signed-off-by: Anshuman Khandual anshuman.khandual@arm.com Link: https://lore.kernel.org/r/20250203050828.1049370-2-anshuman.khandual@arm.com Signed-off-by: Catalin Marinas catalin.marinas@arm.com + (cherry picked from commit cc15f548cc77574bcd68425ae01a796659bd3705) + Signed-off-by: Anshuman Khandual anshuman.khandual@arm.com
## arch/arm64/tools/sysreg ## @@ arch/arm64/tools/sysreg: EndEnum ---
Results of testing on various branches:
| Branch | Patch Apply | Build Test | |---------------------------|-------------|------------| | stable/linux-6.12.y | Success | Success |
This adds register fields for HDFGRTR2_EL2 as per the definitions based on DDI0601 2024-12.
Cc: Will Deacon will@kernel.org Cc: Mark Brown broonie@kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org Reviewed-by: Eric Auger eric.auger@redhat.com Reviewed-by: Mark Brown broonie@kernel.org Signed-off-by: Anshuman Khandual anshuman.khandual@arm.com Link: https://lore.kernel.org/r/20250203050828.1049370-3-anshuman.khandual@arm.com Signed-off-by: Catalin Marinas catalin.marinas@arm.com (cherry picked from commit 44844551670cff70a8aa5c1cde27ad1e0367e009) Signed-off-by: Anshuman Khandual anshuman.khandual@arm.com --- arch/arm64/tools/sysreg | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+)
diff --git a/arch/arm64/tools/sysreg b/arch/arm64/tools/sysreg index 41b0e54515eb..5f6a2fc337b4 100644 --- a/arch/arm64/tools/sysreg +++ b/arch/arm64/tools/sysreg @@ -2465,6 +2465,35 @@ Field 1 ICIALLU Field 0 ICIALLUIS EndSysreg
+Sysreg HDFGRTR2_EL2 3 4 3 1 0 +Res0 63:25 +Field 24 nPMBMAR_EL1 +Field 23 nMDSTEPOP_EL1 +Field 22 nTRBMPAM_EL1 +Res0 21 +Field 20 nTRCITECR_EL1 +Field 19 nPMSDSFR_EL1 +Field 18 nSPMDEVAFF_EL1 +Field 17 nSPMID +Field 16 nSPMSCR_EL1 +Field 15 nSPMACCESSR_EL1 +Field 14 nSPMCR_EL0 +Field 13 nSPMOVS +Field 12 nSPMINTEN +Field 11 nSPMCNTEN +Field 10 nSPMSELR_EL0 +Field 9 nSPMEVTYPERn_EL0 +Field 8 nSPMEVCNTRn_EL0 +Field 7 nPMSSCR_EL1 +Field 6 nPMSSDATA +Field 5 nMDSELR_EL1 +Field 4 nPMUACR_EL1 +Field 3 nPMICFILTR_EL0 +Field 2 nPMICNTR_EL0 +Field 1 nPMIAR_EL1 +Field 0 nPMECR_EL1 +EndSysreg + Sysreg HDFGRTR_EL2 3 4 3 1 4 Field 63 PMBIDR_EL1 Field 62 nPMSNEVFR_EL1
[ Sasha's backport helper bot ]
Hi,
Summary of potential issues: ℹ️ This is part 2/7 of a series ⚠️ Found matching upstream commit but patch is missing proper reference to it
Found matching upstream commit: 44844551670cff70a8aa5c1cde27ad1e0367e009
Status in newer kernel trees: 6.14.y | Not found 6.13.y | Not found
Note: The patch differs from the upstream commit: --- 1: 44844551670cf ! 1: 1ebb6e8b25516 arm64/sysreg: Add register fields for HDFGRTR2_EL2 @@ Commit message Signed-off-by: Anshuman Khandual anshuman.khandual@arm.com Link: https://lore.kernel.org/r/20250203050828.1049370-3-anshuman.khandual@arm.com Signed-off-by: Catalin Marinas catalin.marinas@arm.com + (cherry picked from commit 44844551670cff70a8aa5c1cde27ad1e0367e009) + Signed-off-by: Anshuman Khandual anshuman.khandual@arm.com
## arch/arm64/tools/sysreg ## -@@ arch/arm64/tools/sysreg: Field 0 E0HTRE +@@ arch/arm64/tools/sysreg: Field 1 ICIALLU + Field 0 ICIALLUIS EndSysreg
- +Sysreg HDFGRTR2_EL2 3 4 3 1 0 +Res0 63:25 +Field 24 nPMBMAR_EL1 ---
NOTE: These results are for this patch alone. Full series testing will be performed when all parts are received.
Results of testing on various branches:
| Branch | Patch Apply | Build Test | |---------------------------|-------------|------------| | stable/linux-6.13.y | Success | Success |
This adds register fields for HDFGWTR2_EL2 as per the definitions based on DDI0601 2024-12.
Cc: Will Deacon will@kernel.org Cc: Mark Brown broonie@kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org Reviewed-by: Eric Auger eric.auger@redhat.com Reviewed-by: Mark Brown broonie@kernel.org Signed-off-by: Anshuman Khandual anshuman.khandual@arm.com Link: https://lore.kernel.org/r/20250203050828.1049370-4-anshuman.khandual@arm.com Signed-off-by: Catalin Marinas catalin.marinas@arm.com (cherry picked from commit 2f1f62a1257b9d5eb98a8e161ea7d11f1678f7ad) Signed-off-by: Anshuman Khandual anshuman.khandual@arm.com --- arch/arm64/tools/sysreg | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+)
diff --git a/arch/arm64/tools/sysreg b/arch/arm64/tools/sysreg index 5f6a2fc337b4..b46738690d4a 100644 --- a/arch/arm64/tools/sysreg +++ b/arch/arm64/tools/sysreg @@ -2494,6 +2494,34 @@ Field 1 nPMIAR_EL1 Field 0 nPMECR_EL1 EndSysreg
+Sysreg HDFGWTR2_EL2 3 4 3 1 1 +Res0 63:25 +Field 24 nPMBMAR_EL1 +Field 23 nMDSTEPOP_EL1 +Field 22 nTRBMPAM_EL1 +Field 21 nPMZR_EL0 +Field 20 nTRCITECR_EL1 +Field 19 nPMSDSFR_EL1 +Res0 18:17 +Field 16 nSPMSCR_EL1 +Field 15 nSPMACCESSR_EL1 +Field 14 nSPMCR_EL0 +Field 13 nSPMOVS +Field 12 nSPMINTEN +Field 11 nSPMCNTEN +Field 10 nSPMSELR_EL0 +Field 9 nSPMEVTYPERn_EL0 +Field 8 nSPMEVCNTRn_EL0 +Field 7 nPMSSCR_EL1 +Res0 6 +Field 5 nMDSELR_EL1 +Field 4 nPMUACR_EL1 +Field 3 nPMICFILTR_EL0 +Field 2 nPMICNTR_EL0 +Field 1 nPMIAR_EL1 +Field 0 nPMECR_EL1 +EndSysreg + Sysreg HDFGRTR_EL2 3 4 3 1 4 Field 63 PMBIDR_EL1 Field 62 nPMSNEVFR_EL1
[ Sasha's backport helper bot ]
Hi,
Summary of potential issues: ℹ️ This is part 3/7 of a series ⚠️ Found matching upstream commit but patch is missing proper reference to it
Found matching upstream commit: 2f1f62a1257b9d5eb98a8e161ea7d11f1678f7ad
Status in newer kernel trees: 6.14.y | Not found 6.13.y | Not found
Note: The patch differs from the upstream commit: --- 1: 2f1f62a1257b9 ! 1: 9b69367f213e2 arm64/sysreg: Add register fields for HDFGWTR2_EL2 @@ Commit message Signed-off-by: Anshuman Khandual anshuman.khandual@arm.com Link: https://lore.kernel.org/r/20250203050828.1049370-4-anshuman.khandual@arm.com Signed-off-by: Catalin Marinas catalin.marinas@arm.com + (cherry picked from commit 2f1f62a1257b9d5eb98a8e161ea7d11f1678f7ad) + Signed-off-by: Anshuman Khandual anshuman.khandual@arm.com
## arch/arm64/tools/sysreg ## @@ arch/arm64/tools/sysreg: Field 1 nPMIAR_EL1 ---
NOTE: These results are for this patch alone. Full series testing will be performed when all parts are received.
Results of testing on various branches:
| Branch | Patch Apply | Build Test | |---------------------------|-------------|------------| | stable/linux-6.13.y | Success | Success |
This adds register fields for HFGITR2_EL2 as per the definitions based on DDI0601 2024-12.
Cc: Will Deacon will@kernel.org Cc: Mark Brown broonie@kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org Reviewed-by: Eric Auger eric.auger@redhat.com Reviewed-by: Mark Brown broonie@kernel.org Signed-off-by: Anshuman Khandual anshuman.khandual@arm.com Link: https://lore.kernel.org/r/20250203050828.1049370-5-anshuman.khandual@arm.com Signed-off-by: Catalin Marinas catalin.marinas@arm.com (cherry picked from commit 9401476f17747586a8bfb29abfdf5ade7a8bceef) Signed-off-by: Anshuman Khandual anshuman.khandual@arm.com --- arch/arm64/tools/sysreg | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/arch/arm64/tools/sysreg b/arch/arm64/tools/sysreg index b46738690d4a..85b93c1f74d3 100644 --- a/arch/arm64/tools/sysreg +++ b/arch/arm64/tools/sysreg @@ -2694,6 +2694,12 @@ Field 1 AMEVCNTR00_EL0 Field 0 AMCNTEN0 EndSysreg
+Sysreg HFGITR2_EL2 3 4 3 1 7 +Res0 63:2 +Field 1 nDCCIVAPS +Field 0 TSBCSYNC +EndSysreg + Sysreg ZCR_EL2 3 4 1 2 0 Fields ZCR_ELx EndSysreg
[ Sasha's backport helper bot ]
Hi,
Summary of potential issues: ℹ️ This is part 4/7 of a series ⚠️ Found matching upstream commit but patch is missing proper reference to it
Found matching upstream commit: 9401476f17747586a8bfb29abfdf5ade7a8bceef
Status in newer kernel trees: 6.14.y | Not found 6.13.y | Not found
Note: The patch differs from the upstream commit: --- 1: 9401476f17747 ! 1: 176fc303083b4 arm64/sysreg: Add register fields for HFGITR2_EL2 @@ Commit message Signed-off-by: Anshuman Khandual anshuman.khandual@arm.com Link: https://lore.kernel.org/r/20250203050828.1049370-5-anshuman.khandual@arm.com Signed-off-by: Catalin Marinas catalin.marinas@arm.com + (cherry picked from commit 9401476f17747586a8bfb29abfdf5ade7a8bceef) + Signed-off-by: Anshuman Khandual anshuman.khandual@arm.com
## arch/arm64/tools/sysreg ## @@ arch/arm64/tools/sysreg: Field 1 AMEVCNTR00_EL0 ---
NOTE: These results are for this patch alone. Full series testing will be performed when all parts are received.
Results of testing on various branches:
| Branch | Patch Apply | Build Test | |---------------------------|-------------|------------| | stable/linux-6.13.y | Success | Success |
This adds register fields for HFGRTR2_EL2 as per the definitions based on DDI0601 2024-12.
Cc: Will Deacon will@kernel.org Cc: Mark Brown broonie@kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org Reviewed-by: Eric Auger eric.auger@redhat.com Reviewed-by: Mark Brown broonie@kernel.org Signed-off-by: Anshuman Khandual anshuman.khandual@arm.com Link: https://lore.kernel.org/r/20250203050828.1049370-6-anshuman.khandual@arm.com Signed-off-by: Catalin Marinas catalin.marinas@arm.com (cherry picked from commit 59236089ad5243377b6905d78e39ba4183dc35f5) Signed-off-by: Anshuman Khandual anshuman.khandual@arm.com --- arch/arm64/tools/sysreg | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+)
diff --git a/arch/arm64/tools/sysreg b/arch/arm64/tools/sysreg index 85b93c1f74d3..9c266cf505cd 100644 --- a/arch/arm64/tools/sysreg +++ b/arch/arm64/tools/sysreg @@ -2522,6 +2522,25 @@ Field 1 nPMIAR_EL1 Field 0 nPMECR_EL1 EndSysreg
+Sysreg HFGRTR2_EL2 3 4 3 1 2 +Res0 63:15 +Field 14 nACTLRALIAS_EL1 +Field 13 nACTLRMASK_EL1 +Field 12 nTCR2ALIAS_EL1 +Field 11 nTCRALIAS_EL1 +Field 10 nSCTLRALIAS2_EL1 +Field 9 nSCTLRALIAS_EL1 +Field 8 nCPACRALIAS_EL1 +Field 7 nTCR2MASK_EL1 +Field 6 nTCRMASK_EL1 +Field 5 nSCTLR2MASK_EL1 +Field 4 nSCTLRMASK_EL1 +Field 3 nCPACRMASK_EL1 +Field 2 nRCWSMASK_EL1 +Field 1 nERXGSR_EL1 +Field 0 nPFAR_EL1 +EndSysreg + Sysreg HDFGRTR_EL2 3 4 3 1 4 Field 63 PMBIDR_EL1 Field 62 nPMSNEVFR_EL1
[ Sasha's backport helper bot ]
Hi,
Summary of potential issues: ℹ️ This is part 5/7 of a series ⚠️ Found matching upstream commit but patch is missing proper reference to it
Found matching upstream commit: 59236089ad5243377b6905d78e39ba4183dc35f5
Status in newer kernel trees: 6.14.y | Not found 6.13.y | Not found
Note: The patch differs from the upstream commit: --- 1: 59236089ad524 ! 1: ce81967096841 arm64/sysreg: Add register fields for HFGRTR2_EL2 @@ Commit message Signed-off-by: Anshuman Khandual anshuman.khandual@arm.com Link: https://lore.kernel.org/r/20250203050828.1049370-6-anshuman.khandual@arm.com Signed-off-by: Catalin Marinas catalin.marinas@arm.com + (cherry picked from commit 59236089ad5243377b6905d78e39ba4183dc35f5) + Signed-off-by: Anshuman Khandual anshuman.khandual@arm.com
## arch/arm64/tools/sysreg ## @@ arch/arm64/tools/sysreg: Field 1 nPMIAR_EL1 ---
NOTE: These results are for this patch alone. Full series testing will be performed when all parts are received.
Results of testing on various branches:
| Branch | Patch Apply | Build Test | |---------------------------|-------------|------------| | stable/linux-6.13.y | Success | Success |
This adds register fields for HFGWTR2_EL2 as per the definitions based on DDI0601 2024-12.
Cc: Will Deacon will@kernel.org Cc: Mark Brown broonie@kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org Reviewed-by: Eric Auger eric.auger@redhat.com Reviewed-by: Mark Brown broonie@kernel.org Signed-off-by: Anshuman Khandual anshuman.khandual@arm.com Link: https://lore.kernel.org/r/20250203050828.1049370-7-anshuman.khandual@arm.com Signed-off-by: Catalin Marinas catalin.marinas@arm.com (cherry picked from commit ea37be0773f04420515b8db49e50abedbaa97e23) Signed-off-by: Anshuman Khandual anshuman.khandual@arm.com --- arch/arm64/tools/sysreg | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+)
diff --git a/arch/arm64/tools/sysreg b/arch/arm64/tools/sysreg index 9c266cf505cd..18b42f5af442 100644 --- a/arch/arm64/tools/sysreg +++ b/arch/arm64/tools/sysreg @@ -2541,6 +2541,25 @@ Field 1 nERXGSR_EL1 Field 0 nPFAR_EL1 EndSysreg
+Sysreg HFGWTR2_EL2 3 4 3 1 3 +Res0 63:15 +Field 14 nACTLRALIAS_EL1 +Field 13 nACTLRMASK_EL1 +Field 12 nTCR2ALIAS_EL1 +Field 11 nTCRALIAS_EL1 +Field 10 nSCTLRALIAS2_EL1 +Field 9 nSCTLRALIAS_EL1 +Field 8 nCPACRALIAS_EL1 +Field 7 nTCR2MASK_EL1 +Field 6 nTCRMASK_EL1 +Field 5 nSCTLR2MASK_EL1 +Field 4 nSCTLRMASK_EL1 +Field 3 nCPACRMASK_EL1 +Field 2 nRCWSMASK_EL1 +Res0 1 +Field 0 nPFAR_EL1 +EndSysreg + Sysreg HDFGRTR_EL2 3 4 3 1 4 Field 63 PMBIDR_EL1 Field 62 nPMSNEVFR_EL1
[ Sasha's backport helper bot ]
Hi,
Summary of potential issues: ℹ️ This is part 6/7 of a series ⚠️ Found matching upstream commit but patch is missing proper reference to it
Found matching upstream commit: ea37be0773f04420515b8db49e50abedbaa97e23
Status in newer kernel trees: 6.14.y | Not found 6.13.y | Not found
Note: The patch differs from the upstream commit: --- 1: ea37be0773f04 ! 1: 9a57f7e41a048 arm64/sysreg: Add register fields for HFGWTR2_EL2 @@ Commit message Signed-off-by: Anshuman Khandual anshuman.khandual@arm.com Link: https://lore.kernel.org/r/20250203050828.1049370-7-anshuman.khandual@arm.com Signed-off-by: Catalin Marinas catalin.marinas@arm.com + (cherry picked from commit ea37be0773f04420515b8db49e50abedbaa97e23) + Signed-off-by: Anshuman Khandual anshuman.khandual@arm.com
## arch/arm64/tools/sysreg ## @@ arch/arm64/tools/sysreg: Field 1 nERXGSR_EL1 ---
NOTE: These results are for this patch alone. Full series testing will be performed when all parts are received.
Results of testing on various branches:
| Branch | Patch Apply | Build Test | |---------------------------|-------------|------------| | stable/linux-6.13.y | Success | Success |
FEAT_PMUv3p9 registers such as PMICNTR_EL0, PMICFILTR_EL0, and PMUACR_EL1 access from EL1 requires appropriate EL2 fine grained trap configuration via FEAT_FGT2 based trap control registers HDFGRTR2_EL2 and HDFGWTR2_EL2. Otherwise such register accesses will result in traps into EL2.
Add a new helper __init_el2_fgt2() which initializes FEAT_FGT2 based fine grained trap control registers HDFGRTR2_EL2 and HDFGWTR2_EL2 (setting the bits nPMICNTR_EL0, nPMICFILTR_EL0 and nPMUACR_EL1) to enable access into PMICNTR_EL0, PMICFILTR_EL0, and PMUACR_EL1 registers.
Also update booting.rst with SCR_EL3.FGTEn2 requirement for all FEAT_FGT2 based registers to be accessible in EL2.
Cc: Will Deacon will@kernel.org Cc: Mark Rutland mark.rutland@arm.com Cc: Rob Herring robh@kernel.org Cc: Jonathan Corbet corbet@lwn.net Cc: Marc Zyngier maz@kernel.org Cc: Oliver Upton oliver.upton@linux.dev Cc: linux-arm-kernel@lists.infradead.org Cc: linux-doc@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: kvmarm@lists.linux.dev Fixes: 0bbff9ed8165 ("perf/arm_pmuv3: Add PMUv3.9 per counter EL0 access control") Fixes: d8226d8cfbaf ("perf: arm_pmuv3: Add support for Armv9.4 PMU instruction counter") Tested-by: Rob Herring (Arm) robh@kernel.org Reviewed-by: Rob Herring (Arm) robh@kernel.org Signed-off-by: Anshuman Khandual anshuman.khandual@arm.com Link: https://lore.kernel.org/r/20250227035119.2025171-1-anshuman.khandual@arm.com Signed-off-by: Catalin Marinas catalin.marinas@arm.com (cherry picked from commit 858c7bfcb35e1100b58bb63c9f562d86e09418d9) Signed-off-by: Anshuman Khandual anshuman.khandual@arm.com --- Documentation/arch/arm64/booting.rst | 22 ++++++++++++++++++++++ arch/arm64/include/asm/el2_setup.h | 25 +++++++++++++++++++++++++ arch/arm64/tools/sysreg | 1 + 3 files changed, 48 insertions(+)
diff --git a/Documentation/arch/arm64/booting.rst b/Documentation/arch/arm64/booting.rst index b57776a68f15..15bcd1b4003a 100644 --- a/Documentation/arch/arm64/booting.rst +++ b/Documentation/arch/arm64/booting.rst @@ -285,6 +285,12 @@ Before jumping into the kernel, the following conditions must be met:
- SCR_EL3.FGTEn (bit 27) must be initialised to 0b1.
+ For CPUs with the Fine Grained Traps 2 (FEAT_FGT2) extension present: + + - If EL3 is present and the kernel is entered at EL2: + + - SCR_EL3.FGTEn2 (bit 59) must be initialised to 0b1. + For CPUs with support for HCRX_EL2 (FEAT_HCX) present:
- If EL3 is present and the kernel is entered at EL2: @@ -379,6 +385,22 @@ Before jumping into the kernel, the following conditions must be met:
- SMCR_EL2.EZT0 (bit 30) must be initialised to 0b1.
+ For CPUs with the Performance Monitors Extension (FEAT_PMUv3p9): + + - If EL3 is present: + + - MDCR_EL3.EnPM2 (bit 7) must be initialised to 0b1. + + - If the kernel is entered at EL1 and EL2 is present: + + - HDFGRTR2_EL2.nPMICNTR_EL0 (bit 2) must be initialised to 0b1. + - HDFGRTR2_EL2.nPMICFILTR_EL0 (bit 3) must be initialised to 0b1. + - HDFGRTR2_EL2.nPMUACR_EL1 (bit 4) must be initialised to 0b1. + + - HDFGWTR2_EL2.nPMICNTR_EL0 (bit 2) must be initialised to 0b1. + - HDFGWTR2_EL2.nPMICFILTR_EL0 (bit 3) must be initialised to 0b1. + - HDFGWTR2_EL2.nPMUACR_EL1 (bit 4) must be initialised to 0b1. + For CPUs with Memory Copy and Memory Set instructions (FEAT_MOPS):
- If the kernel is entered at EL1 and EL2 is present: diff --git a/arch/arm64/include/asm/el2_setup.h b/arch/arm64/include/asm/el2_setup.h index e0ffdf13a18b..bdbe9e08664a 100644 --- a/arch/arm64/include/asm/el2_setup.h +++ b/arch/arm64/include/asm/el2_setup.h @@ -215,6 +215,30 @@ .Lskip_fgt_@: .endm
+.macro __init_el2_fgt2 + mrs x1, id_aa64mmfr0_el1 + ubfx x1, x1, #ID_AA64MMFR0_EL1_FGT_SHIFT, #4 + cmp x1, #ID_AA64MMFR0_EL1_FGT_FGT2 + b.lt .Lskip_fgt2_@ + + mov x0, xzr + mrs x1, id_aa64dfr0_el1 + ubfx x1, x1, #ID_AA64DFR0_EL1_PMUVer_SHIFT, #4 + cmp x1, #ID_AA64DFR0_EL1_PMUVer_V3P9 + b.lt .Lskip_pmuv3p9_@ + + orr x0, x0, #HDFGRTR2_EL2_nPMICNTR_EL0 + orr x0, x0, #HDFGRTR2_EL2_nPMICFILTR_EL0 + orr x0, x0, #HDFGRTR2_EL2_nPMUACR_EL1 +.Lskip_pmuv3p9_@: + msr_s SYS_HDFGRTR2_EL2, x0 + msr_s SYS_HDFGWTR2_EL2, x0 + msr_s SYS_HFGRTR2_EL2, xzr + msr_s SYS_HFGWTR2_EL2, xzr + msr_s SYS_HFGITR2_EL2, xzr +.Lskip_fgt2_@: +.endm + .macro __init_el2_nvhe_prepare_eret mov x0, #INIT_PSTATE_EL1 msr spsr_el2, x0 @@ -240,6 +264,7 @@ __init_el2_nvhe_idregs __init_el2_cptr __init_el2_fgt + __init_el2_fgt2 .endm
#ifndef __KVM_NVHE_HYPERVISOR__ diff --git a/arch/arm64/tools/sysreg b/arch/arm64/tools/sysreg index 18b42f5af442..362bcfa0aed1 100644 --- a/arch/arm64/tools/sysreg +++ b/arch/arm64/tools/sysreg @@ -1238,6 +1238,7 @@ UnsignedEnum 11:8 PMUVer 0b0110 V3P5 0b0111 V3P7 0b1000 V3P8 + 0b1001 V3P9 0b1111 IMP_DEF EndEnum UnsignedEnum 7:4 TraceVer
[ Sasha's backport helper bot ]
Hi,
Summary of potential issues: ℹ️ This is part 7/7 of a series ⚠️ Found matching upstream commit but patch is missing proper reference to it
Found matching upstream commit: 858c7bfcb35e1100b58bb63c9f562d86e09418d9
Status in newer kernel trees: 6.14.y | Not found 6.13.y | Not found
Note: The patch differs from the upstream commit: --- 1: 858c7bfcb35e1 ! 1: f5de0f647be12 arm64/boot: Enable EL2 requirements for FEAT_PMUv3p9 @@ Commit message Signed-off-by: Anshuman Khandual anshuman.khandual@arm.com Link: https://lore.kernel.org/r/20250227035119.2025171-1-anshuman.khandual@arm.com Signed-off-by: Catalin Marinas catalin.marinas@arm.com + (cherry picked from commit 858c7bfcb35e1100b58bb63c9f562d86e09418d9) + Signed-off-by: Anshuman Khandual anshuman.khandual@arm.com
## Documentation/arch/arm64/booting.rst ## @@ Documentation/arch/arm64/booting.rst: Before jumping into the kernel, the following conditions must be met: @@ arch/arm64/include/asm/el2_setup.h +.Lskip_fgt2_@: +.endm + - .macro __init_el2_gcs - mrs_s x1, SYS_ID_AA64PFR1_EL1 - ubfx x1, x1, #ID_AA64PFR1_EL1_GCS_SHIFT, #4 + .macro __init_el2_nvhe_prepare_eret + mov x0, #INIT_PSTATE_EL1 + msr spsr_el2, x0 @@ __init_el2_nvhe_idregs __init_el2_cptr __init_el2_fgt + __init_el2_fgt2 - __init_el2_gcs .endm
+ #ifndef __KVM_NVHE_HYPERVISOR__ + + ## arch/arm64/tools/sysreg ## +@@ arch/arm64/tools/sysreg: UnsignedEnum 11:8 PMUVer + 0b0110 V3P5 + 0b0111 V3P7 + 0b1000 V3P8 ++ 0b1001 V3P9 + 0b1111 IMP_DEF + EndEnum + UnsignedEnum 7:4 TraceVer ---
NOTE: These results are for this patch alone. Full series testing will be performed when all parts are received.
Results of testing on various branches:
| Branch | Patch Apply | Build Test | |---------------------------|-------------|------------| | stable/linux-6.13.y | Success | Success |
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Anshuman Khandual -
Sasha Levin