Merge branch kvm-arm64/mpam-ni into kvmarm/next

* kvm-arm64/mpam-ni:
  : Hiding FEAT_MPAM from KVM guests, courtesy of James Morse + Joey Gouly
  :
  : Fix a longstanding bug where FEAT_MPAM was accidentally exposed to KVM
  : guests + the EL2 trap configuration was not explicitly configured. As
  : part of this, bring in skeletal support for initialising the MPAM CPU
  : context so KVM can actually set traps for its guests.
  :
  : Be warned -- if this series leads to boot failures on your system,
  : you're running on turd firmware.
  :
  : As an added bonus (that builds upon the infrastructure added by the MPAM
  : series), allow userspace to configure CTR_EL0.L1Ip, courtesy of Shameer
  : Kolothum.
  KVM: arm64: Make L1Ip feature in CTR_EL0 writable from userspace
  KVM: arm64: selftests: Test ID_AA64PFR0.MPAM isn't completely ignored
  KVM: arm64: Disable MPAM visibility by default and ignore VMM writes
  KVM: arm64: Add a macro for creating filtered sys_reg_descs entries
  KVM: arm64: Fix missing traps of guest accesses to the MPAM registers
  arm64: cpufeature: discover CPU support for MPAM
  arm64: head.S: Initialise MPAM EL2 registers and disable traps
  arm64/sysreg: Convert existing MPAM sysregs and add the remaining entries

Signed-off-by: Oliver Upton <oliver.upton@linux.dev>

2 files changed, 163 insertions, 0 deletions

diff --git a/arch/arm64/tools/cpucaps b/arch/arm64/tools/cpucaps
index eedb5acc21ed..dfac646430ac 100644
--- a/arch/arm64/tools/cpucaps
+++ b/arch/arm64/tools/cpucaps
@@ -60,6 +60,8 @@ HW_DBM
 KVM_HVHE
 KVM_PROTECTED_MODE
 MISMATCHED_CACHE_TYPE
+MPAM
+MPAM_HCR
 MTE
 MTE_ASYMM
 SME
diff --git a/arch/arm64/tools/sysreg b/arch/arm64/tools/sysreg
index a33136243bdf..f27062b8b6a9 100644
--- a/arch/arm64/tools/sysreg
+++ b/arch/arm64/tools/sysreg
@@ -2738,6 +2738,126 @@ Field	1	E2SPE
 Field	0	E0HSPE
 EndSysreg
 
+Sysreg	MPAMHCR_EL2	3	4	10	4	0
+Res0	63:32
+Field	31	TRAP_MPAMIDR_EL1
+Res0	30:9
+Field	8	GSTAPP_PLK
+Res0	7:2
+Field	1	EL1_VPMEN
+Field	0	EL0_VPMEN
+EndSysreg
+
+Sysreg	MPAMVPMV_EL2	3	4	10	4	1
+Res0	63:32
+Field	31	VPM_V31
+Field	30	VPM_V30
+Field	29	VPM_V29
+Field	28	VPM_V28
+Field	27	VPM_V27
+Field	26	VPM_V26
+Field	25	VPM_V25
+Field	24	VPM_V24
+Field	23	VPM_V23
+Field	22	VPM_V22
+Field	21	VPM_V21
+Field	20	VPM_V20
+Field	19	VPM_V19
+Field	18	VPM_V18
+Field	17	VPM_V17
+Field	16	VPM_V16
+Field	15	VPM_V15
+Field	14	VPM_V14
+Field	13	VPM_V13
+Field	12	VPM_V12
+Field	11	VPM_V11
+Field	10	VPM_V10
+Field	9	VPM_V9
+Field	8	VPM_V8
+Field	7	VPM_V7
+Field	6	VPM_V6
+Field	5	VPM_V5
+Field	4	VPM_V4
+Field	3	VPM_V3
+Field	2	VPM_V2
+Field	1	VPM_V1
+Field	0	VPM_V0
+EndSysreg
+
+Sysreg	MPAM2_EL2	3	4	10	5	0
+Field	63	MPAMEN
+Res0	62:59
+Field	58	TIDR
+Res0	57
+Field	56	ALTSP_HFC
+Field	55	ALTSP_EL2
+Field	54	ALTSP_FRCD
+Res0	53:51
+Field	50	EnMPAMSM
+Field	49	TRAPMPAM0EL1
+Field	48	TRAPMPAM1EL1
+Field	47:40	PMG_D
+Field	39:32	PMG_I
+Field	31:16	PARTID_D
+Field	15:0	PARTID_I
+EndSysreg
+
+Sysreg	MPAMVPM0_EL2	3	4	10	6	0
+Field	63:48	PhyPARTID3
+Field	47:32	PhyPARTID2
+Field	31:16	PhyPARTID1
+Field	15:0	PhyPARTID0
+EndSysreg
+
+Sysreg	MPAMVPM1_EL2	3	4	10	6	1
+Field	63:48	PhyPARTID7
+Field	47:32	PhyPARTID6
+Field	31:16	PhyPARTID5
+Field	15:0	PhyPARTID4
+EndSysreg
+
+Sysreg	MPAMVPM2_EL2	3	4	10	6	2
+Field	63:48	PhyPARTID11
+Field	47:32	PhyPARTID10
+Field	31:16	PhyPARTID9
+Field	15:0	PhyPARTID8
+EndSysreg
+
+Sysreg	MPAMVPM3_EL2	3	4	10	6	3
+Field	63:48	PhyPARTID15
+Field	47:32	PhyPARTID14
+Field	31:16	PhyPARTID13
+Field	15:0	PhyPARTID12
+EndSysreg
+
+Sysreg	MPAMVPM4_EL2	3	4	10	6	4
+Field	63:48	PhyPARTID19
+Field	47:32	PhyPARTID18
+Field	31:16	PhyPARTID17
+Field	15:0	PhyPARTID16
+EndSysreg
+
+Sysreg	MPAMVPM5_EL2	3	4	10	6	5
+Field	63:48	PhyPARTID23
+Field	47:32	PhyPARTID22
+Field	31:16	PhyPARTID21
+Field	15:0	PhyPARTID20
+EndSysreg
+
+Sysreg	MPAMVPM6_EL2	3	4	10	6	6
+Field	63:48	PhyPARTID27
+Field	47:32	PhyPARTID26
+Field	31:16	PhyPARTID25
+Field	15:0	PhyPARTID24
+EndSysreg
+
+Sysreg	MPAMVPM7_EL2	3	4	10	6	7
+Field	63:48	PhyPARTID31
+Field	47:32	PhyPARTID30
+Field	31:16	PhyPARTID29
+Field	15:0	PhyPARTID28
+EndSysreg
+
 Sysreg	CONTEXTIDR_EL2	3	4	13	0	1
 Fields	CONTEXTIDR_ELx
 EndSysreg
@@ -2770,6 +2890,10 @@ Sysreg	FAR_EL12	3	5	6	0	0
 Field	63:0	ADDR
 EndSysreg
 
+Sysreg	MPAM1_EL12	3	5	10	5	0
+Fields	MPAM1_ELx
+EndSysreg
+
 Sysreg	CONTEXTIDR_EL12	3	5	13	0	1
 Fields	CONTEXTIDR_ELx
 EndSysreg
@@ -2949,6 +3073,22 @@ Res0	1
 Field	0	EN
 EndSysreg
 
+Sysreg	MPAMIDR_EL1	3	0	10	4	4
+Res0	63:62
+Field	61	HAS_SDEFLT
+Field	60	HAS_FORCE_NS
+Field	59	SP4
+Field	58	HAS_TIDR
+Field	57	HAS_ALTSP
+Res0	56:40
+Field	39:32	PMG_MAX
+Res0	31:21
+Field	20:18	VPMR_MAX
+Field	17	HAS_HCR
+Res0	16
+Field	15:0	PARTID_MAX
+EndSysreg
+
 Sysreg	LORID_EL1	3	0	10	4	7
 Res0	63:24
 Field	23:16	LD
@@ -2956,6 +3096,27 @@ Res0	15:8
 Field	7:0	LR
 EndSysreg
 
+Sysreg	MPAM1_EL1	3	0	10	5	0
+Field	63	MPAMEN
+Res0	62:61
+Field	60 FORCED_NS
+Res0	59:55
+Field	54	ALTSP_FRCD
+Res0	53:48
+Field	47:40	PMG_D
+Field	39:32	PMG_I
+Field	31:16	PARTID_D
+Field	15:0	PARTID_I
+EndSysreg
+
+Sysreg	MPAM0_EL1	3	0	10	5	1
+Res0	63:48
+Field	47:40	PMG_D
+Field	39:32	PMG_I
+Field	31:16	PARTID_D
+Field	15:0	PARTID_I
+EndSysreg
+
 Sysreg	ISR_EL1	3	0	12	1	0
 Res0	63:11
 Field	10	IS