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[PATCH v2] target/arm: align exposed ID registers with Linux
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From: |
Zhuojia Shen |
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Subject: |
[PATCH v2] target/arm: align exposed ID registers with Linux |
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Date: |
Tue, 22 Nov 2022 15:09:15 -0800 |
In CPUID registers exposed to userspace, some registers were missing
and some fields were not exposed. This patch aligns exposed ID
registers and their fields with what the upstream kernel currently
exposes.
Specifically, the following new ID registers/fields are exposed to
userspace:
ID_AA64PFR1_EL1.BT: bits 3-0
ID_AA64PFR1_EL1.MTE: bits 11-8
ID_AA64PFR1_EL1.SME: bits 27-24
ID_AA64ZFR0_EL1.SVEver: bits 3-0
ID_AA64ZFR0_EL1.AES: bits 7-4
ID_AA64ZFR0_EL1.BitPerm: bits 19-16
ID_AA64ZFR0_EL1.BF16: bits 23-20
ID_AA64ZFR0_EL1.SHA3: bits 35-32
ID_AA64ZFR0_EL1.SM4: bits 43-40
ID_AA64ZFR0_EL1.I8MM: bits 47-44
ID_AA64ZFR0_EL1.F32MM: bits 55-52
ID_AA64ZFR0_EL1.F64MM: bits 59-56
ID_AA64SMFR0_EL1.F32F32: bit 32
ID_AA64SMFR0_EL1.B16F32: bit 34
ID_AA64SMFR0_EL1.F16F32: bit 35
ID_AA64SMFR0_EL1.I8I32: bits 39-36
ID_AA64SMFR0_EL1.F64F64: bit 48
ID_AA64SMFR0_EL1.I16I64: bits 55-52
ID_AA64SMFR0_EL1.FA64: bit 63
ID_AA64MMFR0_EL1.ECV: bits 63-60
ID_AA64MMFR1_EL1.AFP: bits 47-44
ID_AA64MMFR2_EL1.AT: bits 35-32
ID_AA64ISAR0_EL1.RNDR: bits 63-60
ID_AA64ISAR1_EL1.FRINTTS: bits 35-32
ID_AA64ISAR1_EL1.BF16: bits 47-44
ID_AA64ISAR1_EL1.DGH: bits 51-48
ID_AA64ISAR1_EL1.I8MM: bits 55-52
ID_AA64ISAR2_EL1.WFxT: bits 3-0
ID_AA64ISAR2_EL1.RPRES: bits 7-4
ID_AA64ISAR2_EL1.GPA3: bits 11-8
ID_AA64ISAR2_EL1.APA3: bits 15-12
The code is also refactored to use symbolic names for ID register fields
for better readability and maintainability.
Signed-off-by: Zhuojia Shen <chaosdefinition@hotmail.com>
---
target/arm/helper.c | 96 +++++++++++++++++++++++++++++++++++++--------
1 file changed, 79 insertions(+), 17 deletions(-)
diff --git a/target/arm/helper.c b/target/arm/helper.c
index d8c8223ec3..82e45be04a 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -7823,31 +7823,89 @@ void register_cp_regs_for_features(ARMCPU *cpu)
#ifdef CONFIG_USER_ONLY
static const ARMCPRegUserSpaceInfo v8_user_idregs[] = {
{ .name = "ID_AA64PFR0_EL1",
- .exported_bits = 0x000f000f00ff0000,
- .fixed_bits = 0x0000000000000011 },
+ .exported_bits = R_ID_AA64PFR0_FP_MASK |
+ R_ID_AA64PFR0_ADVSIMD_MASK |
+ R_ID_AA64PFR0_SVE_MASK |
+ R_ID_AA64PFR0_DIT_MASK,
+ .fixed_bits = (0x1 << R_ID_AA64PFR0_EL0_SHIFT) |
+ (0x1 << R_ID_AA64PFR0_EL1_SHIFT) },
{ .name = "ID_AA64PFR1_EL1",
- .exported_bits = 0x00000000000000f0 },
+ .exported_bits = R_ID_AA64PFR1_BT_MASK |
+ R_ID_AA64PFR1_SSBS_MASK |
+ R_ID_AA64PFR1_MTE_MASK |
+ R_ID_AA64PFR1_SME_MASK },
{ .name = "ID_AA64PFR*_EL1_RESERVED",
- .is_glob = true },
- { .name = "ID_AA64ZFR0_EL1" },
+ .is_glob = true },
+ { .name = "ID_AA64ZFR0_EL1",
+ .exported_bits = R_ID_AA64ZFR0_SVEVER_MASK |
+ R_ID_AA64ZFR0_AES_MASK |
+ R_ID_AA64ZFR0_BITPERM_MASK |
+ R_ID_AA64ZFR0_BFLOAT16_MASK |
+ R_ID_AA64ZFR0_SHA3_MASK |
+ R_ID_AA64ZFR0_SM4_MASK |
+ R_ID_AA64ZFR0_I8MM_MASK |
+ R_ID_AA64ZFR0_F32MM_MASK |
+ R_ID_AA64ZFR0_F64MM_MASK },
+ { .name = "ID_AA64SMFR0_EL1",
+ .exported_bits = R_ID_AA64SMFR0_F32F32_MASK |
+ R_ID_AA64SMFR0_B16F32_MASK |
+ R_ID_AA64SMFR0_F16F32_MASK |
+ R_ID_AA64SMFR0_I8I32_MASK |
+ R_ID_AA64SMFR0_F64F64_MASK |
+ R_ID_AA64SMFR0_I16I64_MASK |
+ R_ID_AA64SMFR0_FA64_MASK },
{ .name = "ID_AA64MMFR0_EL1",
- .fixed_bits = 0x00000000ff000000 },
- { .name = "ID_AA64MMFR1_EL1" },
+ .exported_bits = R_ID_AA64MMFR0_ECV_MASK,
+ .fixed_bits = (0xf << R_ID_AA64MMFR0_TGRAN64_SHIFT) |
+ (0xf << R_ID_AA64MMFR0_TGRAN4_SHIFT) },
+ { .name = "ID_AA64MMFR1_EL1",
+ .exported_bits = R_ID_AA64MMFR1_AFP_MASK },
+ { .name = "ID_AA64MMFR2_EL1",
+ .exported_bits = R_ID_AA64MMFR2_AT_MASK },
{ .name = "ID_AA64MMFR*_EL1_RESERVED",
- .is_glob = true },
+ .is_glob = true },
{ .name = "ID_AA64DFR0_EL1",
- .fixed_bits = 0x0000000000000006 },
- { .name = "ID_AA64DFR1_EL1" },
+ .fixed_bits = (0x6 << R_ID_AA64DFR0_DEBUGVER_SHIFT) },
+ { .name = "ID_AA64DFR1_EL1" },
{ .name = "ID_AA64DFR*_EL1_RESERVED",
- .is_glob = true },
+ .is_glob = true },
{ .name = "ID_AA64AFR*",
- .is_glob = true },
+ .is_glob = true },
{ .name = "ID_AA64ISAR0_EL1",
- .exported_bits = 0x00fffffff0fffff0 },
+ .exported_bits = R_ID_AA64ISAR0_AES_MASK |
+ R_ID_AA64ISAR0_SHA1_MASK |
+ R_ID_AA64ISAR0_SHA2_MASK |
+ R_ID_AA64ISAR0_CRC32_MASK |
+ R_ID_AA64ISAR0_ATOMIC_MASK |
+ R_ID_AA64ISAR0_RDM_MASK |
+ R_ID_AA64ISAR0_SHA3_MASK |
+ R_ID_AA64ISAR0_SM3_MASK |
+ R_ID_AA64ISAR0_SM4_MASK |
+ R_ID_AA64ISAR0_DP_MASK |
+ R_ID_AA64ISAR0_FHM_MASK |
+ R_ID_AA64ISAR0_TS_MASK |
+ R_ID_AA64ISAR0_RNDR_MASK },
{ .name = "ID_AA64ISAR1_EL1",
- .exported_bits = 0x000000f0ffffffff },
+ .exported_bits = R_ID_AA64ISAR1_DPB_MASK |
+ R_ID_AA64ISAR1_APA_MASK |
+ R_ID_AA64ISAR1_API_MASK |
+ R_ID_AA64ISAR1_JSCVT_MASK |
+ R_ID_AA64ISAR1_FCMA_MASK |
+ R_ID_AA64ISAR1_LRCPC_MASK |
+ R_ID_AA64ISAR1_GPA_MASK |
+ R_ID_AA64ISAR1_GPI_MASK |
+ R_ID_AA64ISAR1_FRINTTS_MASK |
+ R_ID_AA64ISAR1_SB_MASK |
+ R_ID_AA64ISAR1_BF16_MASK |
+ R_ID_AA64ISAR1_DGH_MASK |
+ R_ID_AA64ISAR1_I8MM_MASK },
+ { .name = "ID_AA64ISAR2_EL1",
+ .exported_bits = R_ID_AA64ISAR2_WFXT_MASK |
+ R_ID_AA64ISAR2_RPRES_MASK |
+ R_ID_AA64ISAR2_GPA3_MASK |
+ R_ID_AA64ISAR2_APA3_MASK },
{ .name = "ID_AA64ISAR*_EL1_RESERVED",
- .is_glob = true },
+ .is_glob = true },
};
modify_arm_cp_regs(v8_idregs, v8_user_idregs);
#endif
@@ -8165,8 +8223,12 @@ void register_cp_regs_for_features(ARMCPU *cpu)
#ifdef CONFIG_USER_ONLY
static const ARMCPRegUserSpaceInfo id_v8_user_midr_cp_reginfo[] = {
{ .name = "MIDR_EL1",
- .exported_bits = 0x00000000ffffffff },
- { .name = "REVIDR_EL1" },
+ .exported_bits = R_MIDR_EL1_REVISION_MASK |
+ R_MIDR_EL1_PARTNUM_MASK |
+ R_MIDR_EL1_ARCHITECTURE_MASK |
+ R_MIDR_EL1_VARIANT_MASK |
+ R_MIDR_EL1_IMPLEMENTER_MASK },
+ { .name = "REVIDR_EL1" },
};
modify_arm_cp_regs(id_v8_midr_cp_reginfo, id_v8_user_midr_cp_reginfo);
#endif
--
2.38.1
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