target/arm/helper.c | 96 +++++++++++++++++++++++++------ tests/tcg/aarch64/Makefile.target | 7 ++- tests/tcg/aarch64/sysregs.c | 17 ++++-- 3 files changed, 96 insertions(+), 24 deletions(-)
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.
The test case in tests/tcg/aarch64/sysregs.c is also updated to match
the intended behavior.
Signed-off-by: Zhuojia Shen <chaosdefinition@hotmail.com>
---
This incorporates updates to a test case in tests/tcg/aarch64/sysregs.c
and to the Makefile that builds the test (it requires a more recent
-march flag to test id_aa64smfr0_el1), as well as a fix to a bug that
mistakenly exposed some fields in id_aa64mmfr0_el1 which should not be
exposed otherwise, thanks to Peter Maydell <peter.maydell@linaro.org>
for running the test and spotting the error.
target/arm/helper.c | 96 +++++++++++++++++++++++++------
tests/tcg/aarch64/Makefile.target | 7 ++-
tests/tcg/aarch64/sysregs.c | 17 ++++--
3 files changed, 96 insertions(+), 24 deletions(-)
diff --git a/target/arm/helper.c b/target/arm/helper.c
index bac2ea62c4..9feb8789e8 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -7864,31 +7864,89 @@ 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 = (0x1u << R_ID_AA64PFR0_EL0_SHIFT) |
+ (0x1u << 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 = (0xfu << R_ID_AA64MMFR0_TGRAN64_SHIFT) |
+ (0xfu << 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 = (0x6u << 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
@@ -8206,8 +8264,12 @@ 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
diff --git a/tests/tcg/aarch64/Makefile.target b/tests/tcg/aarch64/Makefile.target
index fc8d90ed69..db122ab4ff 100644
--- a/tests/tcg/aarch64/Makefile.target
+++ b/tests/tcg/aarch64/Makefile.target
@@ -23,7 +23,8 @@ config-cc.mak: Makefile
$(call cc-option,-march=armv8.1-a+sve2, CROSS_CC_HAS_SVE2); \
$(call cc-option,-march=armv8.3-a, CROSS_CC_HAS_ARMV8_3); \
$(call cc-option,-mbranch-protection=standard, CROSS_CC_HAS_ARMV8_BTI); \
- $(call cc-option,-march=armv8.5-a+memtag, CROSS_CC_HAS_ARMV8_MTE)) 3> config-cc.mak
+ $(call cc-option,-march=armv8.5-a+memtag, CROSS_CC_HAS_ARMV8_MTE); \
+ $(call cc-option,-march=armv9-a+sme, CROSS_CC_HAS_ARMV9_SME)) 3> config-cc.mak
-include config-cc.mak
# Pauth Tests
@@ -53,7 +54,11 @@ endif
ifneq ($(CROSS_CC_HAS_SVE),)
# System Registers Tests
AARCH64_TESTS += sysregs
+ifneq ($(CROSS_CC_HAS_ARMV9_SME),)
+sysregs: CFLAGS+=-march=armv9-a+sme -DHAS_ARMV9_SME
+else
sysregs: CFLAGS+=-march=armv8.1-a+sve
+endif
# SVE ioctl test
AARCH64_TESTS += sve-ioctls
diff --git a/tests/tcg/aarch64/sysregs.c b/tests/tcg/aarch64/sysregs.c
index 40cf8d2877..7d9b0168da 100644
--- a/tests/tcg/aarch64/sysregs.c
+++ b/tests/tcg/aarch64/sysregs.c
@@ -112,18 +112,23 @@ int main(void)
* minimum valid fields - for the purposes of this check allowed
* to have non-zero values.
*/
- get_cpu_reg_check_mask(id_aa64isar0_el1, _m(00ff,ffff,f0ff,fff0));
- get_cpu_reg_check_mask(id_aa64isar1_el1, _m(0000,00f0,ffff,ffff));
+ get_cpu_reg_check_mask(id_aa64isar0_el1, _m(f0ff,ffff,f0ff,fff0));
+ get_cpu_reg_check_mask(id_aa64isar1_el1, _m(00ff,f0ff,ffff,ffff));
+ get_cpu_reg_check_mask(id_aa64isar2_el1, _m(0000,0000,0000,ffff));
/* TGran4 & TGran64 as pegged to -1 */
- get_cpu_reg_check_mask(id_aa64mmfr0_el1, _m(0000,0000,ff00,0000));
- get_cpu_reg_check_zero(id_aa64mmfr1_el1);
+ get_cpu_reg_check_mask(id_aa64mmfr0_el1, _m(f000,0000,ff00,0000));
+ get_cpu_reg_check_mask(id_aa64mmfr1_el1, _m(0000,f000,0000,0000));
+ get_cpu_reg_check_mask(id_aa64mmfr2_el1, _m(0000,000f,0000,0000));
/* EL1/EL0 reported as AA64 only */
get_cpu_reg_check_mask(id_aa64pfr0_el1, _m(000f,000f,00ff,0011));
- get_cpu_reg_check_mask(id_aa64pfr1_el1, _m(0000,0000,0000,00f0));
+ get_cpu_reg_check_mask(id_aa64pfr1_el1, _m(0000,0000,0f00,0fff));
/* all hidden, DebugVer fixed to 0x6 (ARMv8 debug architecture) */
get_cpu_reg_check_mask(id_aa64dfr0_el1, _m(0000,0000,0000,0006));
get_cpu_reg_check_zero(id_aa64dfr1_el1);
- get_cpu_reg_check_zero(id_aa64zfr0_el1);
+ get_cpu_reg_check_mask(id_aa64zfr0_el1, _m(0ff0,ff0f,00ff,00ff));
+#ifdef HAS_ARMV9_SME
+ get_cpu_reg_check_mask(id_aa64smfr0_el1, _m(80f1,00fd,0000,0000));
+#endif
get_cpu_reg_check_zero(id_aa64afr0_el1);
get_cpu_reg_check_zero(id_aa64afr1_el1);
--
2.38.1On Sat, 17 Dec 2022 at 01:49, Zhuojia Shen <chaosdefinition@hotmail.com> wrote:
>
> 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.
This fails to compile the test program on my system:
/tmp/ccWsT6Ea.s: Assembler messages:
/tmp/ccWsT6Ea.s:413: Error: unknown or missing system register name at
operand 2 -- `mrs x0,id_aa64isar2_el1'
/tmp/ccWsT6Ea.s:544: Error: selected processor does not support system
register name 'id_aa64mmfr2_el1'
because the assembler is too old to recognize these newer ID register
names. I'm going to fix this by squashing in this change, which
uses the fallback Sn_n_Cn_Cn_n syntax instead:
diff --git a/tests/tcg/aarch64/sysregs.c b/tests/tcg/aarch64/sysregs.c
index 7d9b0168da2..46b931f781d 100644
--- a/tests/tcg/aarch64/sysregs.c
+++ b/tests/tcg/aarch64/sysregs.c
@@ -22,6 +22,13 @@
#define HWCAP_CPUID (1 << 11)
#endif
+/*
+ * Older assemblers don't recognize newer system register names,
+ * but we can still access them by the Sn_n_Cn_Cn_n syntax.
+ */
+#define SYS_ID_AA64ISAR2_EL1 S3_0_C0_C6_2
+#define SYS_ID_AA64MMFR2_EL1 S3_0_C0_C7_2
+
int failed_bit_count;
/* Read and print system register `id' value */
@@ -114,11 +121,11 @@ int main(void)
*/
get_cpu_reg_check_mask(id_aa64isar0_el1, _m(f0ff,ffff,f0ff,fff0));
get_cpu_reg_check_mask(id_aa64isar1_el1, _m(00ff,f0ff,ffff,ffff));
- get_cpu_reg_check_mask(id_aa64isar2_el1, _m(0000,0000,0000,ffff));
+ get_cpu_reg_check_mask(SYS_ID_AA64ISAR2_EL1, _m(0000,0000,0000,ffff));
/* TGran4 & TGran64 as pegged to -1 */
get_cpu_reg_check_mask(id_aa64mmfr0_el1, _m(f000,0000,ff00,0000));
get_cpu_reg_check_mask(id_aa64mmfr1_el1, _m(0000,f000,0000,0000));
- get_cpu_reg_check_mask(id_aa64mmfr2_el1, _m(0000,000f,0000,0000));
+ get_cpu_reg_check_mask(SYS_ID_AA64MMFR2_EL1, _m(0000,000f,0000,0000));
/* EL1/EL0 reported as AA64 only */
get_cpu_reg_check_mask(id_aa64pfr0_el1, _m(000f,000f,00ff,0011));
get_cpu_reg_check_mask(id_aa64pfr1_el1, _m(0000,0000,0f00,0fff));
Applied to target-arm.next, thanks.
-- PMM
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