From 3dc2afeab2964b54848715b913b6c605f36be3e1 Mon Sep 17 00:00:00 2001 From: Peter Maydell Date: Thu, 6 Jul 2023 12:38:19 +0100 Subject: tests/tcg/aarch64/sysregs.c: Use S syntax for id_aa64zfr0_el1 and id_aa64smfr0_el1 Some assemblers will complain about attempts to access id_aa64zfr0_el1 and id_aa64smfr0_el1 by name if the test binary isn't built for the right processor type: /tmp/ccASXpLo.s:782: Error: selected processor does not support system register name 'id_aa64zfr0_el1' /tmp/ccASXpLo.s:829: Error: selected processor does not support system register name 'id_aa64smfr0_el1' However, these registers are in the ID space and are guaranteed to read-as-zero on older CPUs, so the access is both safe and sensible. Switch to using the S syntax, as we already do for ID_AA64ISAR2_EL1 and ID_AA64MMFR2_EL1. This allows us to drop the HAS_ARMV9_SME check and the makefile machinery to adjust the CFLAGS for this test, so we don't rely on having a sufficiently new compiler to be able to check these registers. This means we're actually testing the SME ID register: no released GCC yet recognizes -march=armv9-a+sme, so that was always skipped. It also avoids a future problem if we try to switch the "do we have SME support in the toolchain" check from "in the compiler" to "in the assembler" (at which point we would otherwise run into the above errors). Signed-off-by: Peter Maydell --- tests/tcg/aarch64/Makefile.target | 7 +------ tests/tcg/aarch64/sysregs.c | 11 +++++++---- 2 files changed, 8 insertions(+), 10 deletions(-) (limited to 'tests/tcg/aarch64') diff --git a/tests/tcg/aarch64/Makefile.target b/tests/tcg/aarch64/Makefile.target index cec1d4b..ea9ceb3 100644 --- a/tests/tcg/aarch64/Makefile.target +++ b/tests/tcg/aarch64/Makefile.target @@ -61,15 +61,10 @@ AARCH64_TESTS += mte-1 mte-2 mte-3 mte-4 mte-5 mte-6 mte-7 mte-%: CFLAGS += -march=armv8.5-a+memtag 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 +ifneq ($(CROSS_CC_HAS_SVE),) # SVE ioctl test AARCH64_TESTS += sve-ioctls sve-ioctls: CFLAGS+=-march=armv8.1-a+sve diff --git a/tests/tcg/aarch64/sysregs.c b/tests/tcg/aarch64/sysregs.c index 46b931f..d8eb06a 100644 --- a/tests/tcg/aarch64/sysregs.c +++ b/tests/tcg/aarch64/sysregs.c @@ -25,9 +25,14 @@ /* * Older assemblers don't recognize newer system register names, * but we can still access them by the Sn_n_Cn_Cn_n syntax. + * This also means we don't need to specifically request that the + * assembler enables whatever architectural features the ID registers + * syntax might be gated behind. */ #define SYS_ID_AA64ISAR2_EL1 S3_0_C0_C6_2 #define SYS_ID_AA64MMFR2_EL1 S3_0_C0_C7_2 +#define SYS_ID_AA64ZFR0_EL1 S3_0_C0_C4_4 +#define SYS_ID_AA64SMFR0_EL1 S3_0_C0_C4_5 int failed_bit_count; @@ -132,10 +137,8 @@ int main(void) /* 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_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_mask(SYS_ID_AA64ZFR0_EL1, _m(0ff0,ff0f,00ff,00ff)); + get_cpu_reg_check_mask(SYS_ID_AA64SMFR0_EL1, _m(80f1,00fd,0000,0000)); get_cpu_reg_check_zero(id_aa64afr0_el1); get_cpu_reg_check_zero(id_aa64afr1_el1); -- cgit v1.1