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arm64: cpufeature: Change read_cpuid() to use sysreg's mrs_s macro

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Older assemblers may not have support for newer feature registers. To get
round this, sysreg.h provides a 'mrs_s' macro that takes a register
encoding and generates the raw instruction.

Change read_cpuid() to use mrs_s in all cases so that new registers
don't have to be a special case. Including sysreg.h means we need to move
the include and definition of read_cpuid() after the #ifndef __ASSEMBLY__
to avoid syntax errors in vmlinux.lds.

Signed-off-by: James Morse <james.morse@arm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
James Morse
2016-02-05 14:58:46 +00:00
committed by Catalin Marinas
parent 7abc7d833c
commit 0f54b14e76
5 changed files with 65 additions and 63 deletions
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54
arch/arm64/kernel/cpufeature.c
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@@ -808,35 +808,35 @@ static inline void set_sys_caps_initialised(void)
static u64 __raw_read_system_reg(u32 sys_id)
{
switch (sys_id) {
case SYS_ID_PFR0_EL1: return (u64)read_cpuid(ID_PFR0_EL1);
case SYS_ID_PFR1_EL1: return (u64)read_cpuid(ID_PFR1_EL1);
case SYS_ID_DFR0_EL1: return (u64)read_cpuid(ID_DFR0_EL1);
case SYS_ID_MMFR0_EL1: return (u64)read_cpuid(ID_MMFR0_EL1);
case SYS_ID_MMFR1_EL1: return (u64)read_cpuid(ID_MMFR1_EL1);
case SYS_ID_MMFR2_EL1: return (u64)read_cpuid(ID_MMFR2_EL1);
case SYS_ID_MMFR3_EL1: return (u64)read_cpuid(ID_MMFR3_EL1);
case SYS_ID_ISAR0_EL1: return (u64)read_cpuid(ID_ISAR0_EL1);
case SYS_ID_ISAR1_EL1: return (u64)read_cpuid(ID_ISAR1_EL1);
case SYS_ID_ISAR2_EL1: return (u64)read_cpuid(ID_ISAR2_EL1);
case SYS_ID_ISAR3_EL1: return (u64)read_cpuid(ID_ISAR3_EL1);
case SYS_ID_ISAR4_EL1: return (u64)read_cpuid(ID_ISAR4_EL1);
case SYS_ID_ISAR5_EL1: return (u64)read_cpuid(ID_ISAR4_EL1);
case SYS_MVFR0_EL1: return (u64)read_cpuid(MVFR0_EL1);
case SYS_MVFR1_EL1: return (u64)read_cpuid(MVFR1_EL1);
case SYS_MVFR2_EL1: return (u64)read_cpuid(MVFR2_EL1);
case SYS_ID_PFR0_EL1: return read_cpuid(SYS_ID_PFR0_EL1);
case SYS_ID_PFR1_EL1: return read_cpuid(SYS_ID_PFR1_EL1);
case SYS_ID_DFR0_EL1: return read_cpuid(SYS_ID_DFR0_EL1);
case SYS_ID_MMFR0_EL1: return read_cpuid(SYS_ID_MMFR0_EL1);
case SYS_ID_MMFR1_EL1: return read_cpuid(SYS_ID_MMFR1_EL1);
case SYS_ID_MMFR2_EL1: return read_cpuid(SYS_ID_MMFR2_EL1);
case SYS_ID_MMFR3_EL1: return read_cpuid(SYS_ID_MMFR3_EL1);
case SYS_ID_ISAR0_EL1: return read_cpuid(SYS_ID_ISAR0_EL1);
case SYS_ID_ISAR1_EL1: return read_cpuid(SYS_ID_ISAR1_EL1);
case SYS_ID_ISAR2_EL1: return read_cpuid(SYS_ID_ISAR2_EL1);
case SYS_ID_ISAR3_EL1: return read_cpuid(SYS_ID_ISAR3_EL1);
case SYS_ID_ISAR4_EL1: return read_cpuid(SYS_ID_ISAR4_EL1);
case SYS_ID_ISAR5_EL1: return read_cpuid(SYS_ID_ISAR4_EL1);
case SYS_MVFR0_EL1: return read_cpuid(SYS_MVFR0_EL1);
case SYS_MVFR1_EL1: return read_cpuid(SYS_MVFR1_EL1);
case SYS_MVFR2_EL1: return read_cpuid(SYS_MVFR2_EL1);
case SYS_ID_AA64PFR0_EL1: return (u64)read_cpuid(ID_AA64PFR0_EL1);
case SYS_ID_AA64PFR1_EL1: return (u64)read_cpuid(ID_AA64PFR0_EL1);
case SYS_ID_AA64DFR0_EL1: return (u64)read_cpuid(ID_AA64DFR0_EL1);
case SYS_ID_AA64DFR1_EL1: return (u64)read_cpuid(ID_AA64DFR0_EL1);
case SYS_ID_AA64MMFR0_EL1: return (u64)read_cpuid(ID_AA64MMFR0_EL1);
case SYS_ID_AA64MMFR1_EL1: return (u64)read_cpuid(ID_AA64MMFR1_EL1);
case SYS_ID_AA64ISAR0_EL1: return (u64)read_cpuid(ID_AA64ISAR0_EL1);
case SYS_ID_AA64ISAR1_EL1: return (u64)read_cpuid(ID_AA64ISAR1_EL1);
case SYS_ID_AA64PFR0_EL1: return read_cpuid(SYS_ID_AA64PFR0_EL1);
case SYS_ID_AA64PFR1_EL1: return read_cpuid(SYS_ID_AA64PFR0_EL1);
case SYS_ID_AA64DFR0_EL1: return read_cpuid(SYS_ID_AA64DFR0_EL1);
case SYS_ID_AA64DFR1_EL1: return read_cpuid(SYS_ID_AA64DFR0_EL1);
case SYS_ID_AA64MMFR0_EL1: return read_cpuid(SYS_ID_AA64MMFR0_EL1);
case SYS_ID_AA64MMFR1_EL1: return read_cpuid(SYS_ID_AA64MMFR1_EL1);
case SYS_ID_AA64ISAR0_EL1: return read_cpuid(SYS_ID_AA64ISAR0_EL1);
case SYS_ID_AA64ISAR1_EL1: return read_cpuid(SYS_ID_AA64ISAR1_EL1);
case SYS_CNTFRQ_EL0: return (u64)read_cpuid(CNTFRQ_EL0);
case SYS_CTR_EL0: return (u64)read_cpuid(CTR_EL0);
case SYS_DCZID_EL0: return (u64)read_cpuid(DCZID_EL0);
case SYS_CNTFRQ_EL0: return read_cpuid(SYS_CNTFRQ_EL0);
case SYS_CTR_EL0: return read_cpuid(SYS_CTR_EL0);
case SYS_DCZID_EL0: return read_cpuid(SYS_DCZID_EL0);
default:
BUG();
return 0;