diff --git a/Documentation/arm64/cpu-feature-registers.txt b/Documentation/arm64/cpu-feature-registers.txt index 5b279dcee9c6f0272d3cba27bc5c64aa0ecb2bef..0ce0a4021aa413f14601d821bcbfde13b7ce778f 100644 --- a/Documentation/arm64/cpu-feature-registers.txt +++ b/Documentation/arm64/cpu-feature-registers.txt @@ -174,6 +174,8 @@ infrastructure: x--------------------------------------------------x | Name | bits | visible | |--------------------------------------------------| + | FCMA | [19-16] | y | + |--------------------------------------------------| | JSCVT | [15-12] | y | x--------------------------------------------------x diff --git a/arch/arm64/include/asm/sysreg.h b/arch/arm64/include/asm/sysreg.h index cbb314389a5bf0dcda0b9e41d5a2ae4f7399a9f3..69af995c9b76c99743389d5957b92ddd1b4e1db2 100644 --- a/arch/arm64/include/asm/sysreg.h +++ b/arch/arm64/include/asm/sysreg.h @@ -157,6 +157,7 @@ #define ID_AA64ISAR0_AES_SHIFT 4 /* id_aa64isar1 */ +#define ID_AA64ISAR1_FCMA_SHIFT 16 #define ID_AA64ISAR1_JSCVT_SHIFT 12 /* id_aa64pfr0 */ diff --git a/arch/arm64/include/uapi/asm/hwcap.h b/arch/arm64/include/uapi/asm/hwcap.h index 391a876f055defbb842bf393d514c93570d50506..85841a469cda8bb84eb47d0accfda12fdd823c43 100644 --- a/arch/arm64/include/uapi/asm/hwcap.h +++ b/arch/arm64/include/uapi/asm/hwcap.h @@ -33,5 +33,6 @@ #define HWCAP_CPUID (1 << 11) #define HWCAP_ASIMDRDM (1 << 12) #define HWCAP_JSCVT (1 << 13) +#define HWCAP_FCMA (1 << 14) #endif /* _UAPI__ASM_HWCAP_H */ diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index 3085d0e595c73c0c40fe537c53d77263c8e71a3e..3ce8b18a1ab557c1870c411c31779d772da01bda 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -98,6 +98,7 @@ static const struct arm64_ftr_bits ftr_id_aa64isar0[] = { }; static const struct arm64_ftr_bits ftr_id_aa64isar1[] = { + ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_EXACT, ID_AA64ISAR1_FCMA_SHIFT, 4, 0), ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_EXACT, ID_AA64ISAR1_JSCVT_SHIFT, 4, 0), ARM64_FTR_END, }; @@ -894,6 +895,7 @@ static const struct arm64_cpu_capabilities arm64_elf_hwcaps[] = { HWCAP_CAP(SYS_ID_AA64PFR0_EL1, ID_AA64PFR0_ASIMD_SHIFT, FTR_SIGNED, 0, CAP_HWCAP, HWCAP_ASIMD), HWCAP_CAP(SYS_ID_AA64PFR0_EL1, ID_AA64PFR0_ASIMD_SHIFT, FTR_SIGNED, 1, CAP_HWCAP, HWCAP_ASIMDHP), HWCAP_CAP(SYS_ID_AA64ISAR1_EL1, ID_AA64ISAR1_JSCVT_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, HWCAP_JSCVT), + HWCAP_CAP(SYS_ID_AA64ISAR1_EL1, ID_AA64ISAR1_FCMA_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, HWCAP_FCMA), {}, }; diff --git a/arch/arm64/kernel/cpuinfo.c b/arch/arm64/kernel/cpuinfo.c index 32776597e4e6161d8eb12fb26130a86f439a65a8..4a43c6abb42283f799ed80d79c0709370abd83c4 100644 --- a/arch/arm64/kernel/cpuinfo.c +++ b/arch/arm64/kernel/cpuinfo.c @@ -66,6 +66,7 @@ static const char *const hwcap_str[] = { "cpuid", "asimdrdm", "jscvt", + "fcma", NULL };