arm64: make mrs_s prefixing implicit in read_cpuid

Commit 0f54b14e76f5302a ("arm64: cpufeature: Change read_cpuid() to use
sysreg's mrs_s macro") changed read_cpuid to require a SYS_ prefix on
register names, to allow manual assembly of registers unknown by the
toolchain, using tables in sysreg.h.

This interacts poorly with commit 42b55734030c1f72 ("efi/arm64: Check
for h/w support before booting a >4 KB granular kernel"), which is
curretly queued via the tip tree, and uses read_cpuid without a SYS_
prefix. Due to this, a build of next-20160304 fails if EFI and 64K pages
are selected.

To avoid this issue when trees are merged, move the required SYS_
prefixing into read_cpuid, and revert all of the updated callsites to
pass plain register names. This effectively reverts the bulk of commit
0f54b14e76f5302a.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: James Morse <james.morse@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

diff --git a/arch/arm64/include/asm/cpufeature.h b/arch/arm64/include/asm/cpufeature.h
index 1497163..f6f7423 100644 (file)
--- a/arch/arm64/include/asm/cpufeature.h
+++ b/arch/arm64/include/asm/cpufeature.h
@@ -181,7 +181,7 @@ u64 read_system_reg(u32 id);
 
 static inline bool cpu_supports_mixed_endian_el0(void)
 {
-       return id_aa64mmfr0_mixed_endian_el0(read_cpuid(SYS_ID_AA64MMFR0_EL1));
+       return id_aa64mmfr0_mixed_endian_el0(read_cpuid(ID_AA64MMFR0_EL1));
 }
 
 static inline bool system_supports_mixed_endian_el0(void)

diff --git a/arch/arm64/include/asm/cputype.h b/arch/arm64/include/asm/cputype.h
index b3a83da..f2309a2 100644 (file)
--- a/arch/arm64/include/asm/cputype.h
+++ b/arch/arm64/include/asm/cputype.h
@@ -90,7 +90,7 @@
 
 #define read_cpuid(reg) ({                                             \
        u64 __val;                                                      \
-       asm("mrs_s      %0, " __stringify(reg) : "=r" (__val));         \
+       asm("mrs_s      %0, " __stringify(SYS_ ## reg) : "=r" (__val)); \
        __val;                                                          \
 })
 
@@ -101,12 +101,12 @@
  */
 static inline u32 __attribute_const__ read_cpuid_id(void)
 {
-       return read_cpuid(SYS_MIDR_EL1);
+       return read_cpuid(MIDR_EL1);
 }
 
 static inline u64 __attribute_const__ read_cpuid_mpidr(void)
 {
-       return read_cpuid(SYS_MPIDR_EL1);
+       return read_cpuid(MPIDR_EL1);
 }
 
 static inline unsigned int __attribute_const__ read_cpuid_implementor(void)
@@ -121,7 +121,7 @@ static inline unsigned int __attribute_const__ read_cpuid_part_number(void)
 
 static inline u32 __attribute_const__ read_cpuid_cachetype(void)
 {
-       return read_cpuid(SYS_CTR_EL0);
+       return read_cpuid(CTR_EL0);
 }
 #endif /* __ASSEMBLY__ */
 

diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
index 3c9d708..392c67e 100644 (file)
--- a/arch/arm64/kernel/cpufeature.c
+++ b/arch/arm64/kernel/cpufeature.c
@@ -855,36 +855,36 @@ 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 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 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_AA64MMFR2_EL1:      return read_cpuid(SYS_ID_AA64MMFR2_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 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);
+       case SYS_ID_PFR0_EL1:           return read_cpuid(ID_PFR0_EL1);
+       case SYS_ID_PFR1_EL1:           return read_cpuid(ID_PFR1_EL1);
+       case SYS_ID_DFR0_EL1:           return read_cpuid(ID_DFR0_EL1);
+       case SYS_ID_MMFR0_EL1:          return read_cpuid(ID_MMFR0_EL1);
+       case SYS_ID_MMFR1_EL1:          return read_cpuid(ID_MMFR1_EL1);
+       case SYS_ID_MMFR2_EL1:          return read_cpuid(ID_MMFR2_EL1);
+       case SYS_ID_MMFR3_EL1:          return read_cpuid(ID_MMFR3_EL1);
+       case SYS_ID_ISAR0_EL1:          return read_cpuid(ID_ISAR0_EL1);
+       case SYS_ID_ISAR1_EL1:          return read_cpuid(ID_ISAR1_EL1);
+       case SYS_ID_ISAR2_EL1:          return read_cpuid(ID_ISAR2_EL1);
+       case SYS_ID_ISAR3_EL1:          return read_cpuid(ID_ISAR3_EL1);
+       case SYS_ID_ISAR4_EL1:          return read_cpuid(ID_ISAR4_EL1);
+       case SYS_ID_ISAR5_EL1:          return read_cpuid(ID_ISAR4_EL1);
+       case SYS_MVFR0_EL1:             return read_cpuid(MVFR0_EL1);
+       case SYS_MVFR1_EL1:             return read_cpuid(MVFR1_EL1);
+       case SYS_MVFR2_EL1:             return read_cpuid(MVFR2_EL1);
+
+       case SYS_ID_AA64PFR0_EL1:       return read_cpuid(ID_AA64PFR0_EL1);
+       case SYS_ID_AA64PFR1_EL1:       return read_cpuid(ID_AA64PFR0_EL1);
+       case SYS_ID_AA64DFR0_EL1:       return read_cpuid(ID_AA64DFR0_EL1);
+       case SYS_ID_AA64DFR1_EL1:       return read_cpuid(ID_AA64DFR0_EL1);
+       case SYS_ID_AA64MMFR0_EL1:      return read_cpuid(ID_AA64MMFR0_EL1);
+       case SYS_ID_AA64MMFR1_EL1:      return read_cpuid(ID_AA64MMFR1_EL1);
+       case SYS_ID_AA64MMFR2_EL1:      return read_cpuid(ID_AA64MMFR2_EL1);
+       case SYS_ID_AA64ISAR0_EL1:      return read_cpuid(ID_AA64ISAR0_EL1);
+       case SYS_ID_AA64ISAR1_EL1:      return read_cpuid(ID_AA64ISAR1_EL1);
+
+       case SYS_CNTFRQ_EL0:            return read_cpuid(CNTFRQ_EL0);
+       case SYS_CTR_EL0:               return read_cpuid(CTR_EL0);
+       case SYS_DCZID_EL0:             return read_cpuid(DCZID_EL0);
        default:
                BUG();
                return 0;

diff --git a/arch/arm64/kernel/cpuinfo.c b/arch/arm64/kernel/cpuinfo.c
index 00bdfa3..84c8684 100644 (file)
--- a/arch/arm64/kernel/cpuinfo.c
+++ b/arch/arm64/kernel/cpuinfo.c
@@ -203,36 +203,36 @@ static void __cpuinfo_store_cpu(struct cpuinfo_arm64 *info)
 {
        info->reg_cntfrq = arch_timer_get_cntfrq();
        info->reg_ctr = read_cpuid_cachetype();
-       info->reg_dczid = read_cpuid(SYS_DCZID_EL0);
+       info->reg_dczid = read_cpuid(DCZID_EL0);
        info->reg_midr = read_cpuid_id();
 
-       info->reg_id_aa64dfr0 = read_cpuid(SYS_ID_AA64DFR0_EL1);
-       info->reg_id_aa64dfr1 = read_cpuid(SYS_ID_AA64DFR1_EL1);
-       info->reg_id_aa64isar0 = read_cpuid(SYS_ID_AA64ISAR0_EL1);
-       info->reg_id_aa64isar1 = read_cpuid(SYS_ID_AA64ISAR1_EL1);
-       info->reg_id_aa64mmfr0 = read_cpuid(SYS_ID_AA64MMFR0_EL1);
-       info->reg_id_aa64mmfr1 = read_cpuid(SYS_ID_AA64MMFR1_EL1);
-       info->reg_id_aa64mmfr2 = read_cpuid(SYS_ID_AA64MMFR2_EL1);
-       info->reg_id_aa64pfr0 = read_cpuid(SYS_ID_AA64PFR0_EL1);
-       info->reg_id_aa64pfr1 = read_cpuid(SYS_ID_AA64PFR1_EL1);
-
-       info->reg_id_dfr0 = read_cpuid(SYS_ID_DFR0_EL1);
-       info->reg_id_isar0 = read_cpuid(SYS_ID_ISAR0_EL1);
-       info->reg_id_isar1 = read_cpuid(SYS_ID_ISAR1_EL1);
-       info->reg_id_isar2 = read_cpuid(SYS_ID_ISAR2_EL1);
-       info->reg_id_isar3 = read_cpuid(SYS_ID_ISAR3_EL1);
-       info->reg_id_isar4 = read_cpuid(SYS_ID_ISAR4_EL1);
-       info->reg_id_isar5 = read_cpuid(SYS_ID_ISAR5_EL1);
-       info->reg_id_mmfr0 = read_cpuid(SYS_ID_MMFR0_EL1);
-       info->reg_id_mmfr1 = read_cpuid(SYS_ID_MMFR1_EL1);
-       info->reg_id_mmfr2 = read_cpuid(SYS_ID_MMFR2_EL1);
-       info->reg_id_mmfr3 = read_cpuid(SYS_ID_MMFR3_EL1);
-       info->reg_id_pfr0 = read_cpuid(SYS_ID_PFR0_EL1);
-       info->reg_id_pfr1 = read_cpuid(SYS_ID_PFR1_EL1);
-
-       info->reg_mvfr0 = read_cpuid(SYS_MVFR0_EL1);
-       info->reg_mvfr1 = read_cpuid(SYS_MVFR1_EL1);
-       info->reg_mvfr2 = read_cpuid(SYS_MVFR2_EL1);
+       info->reg_id_aa64dfr0 = read_cpuid(ID_AA64DFR0_EL1);
+       info->reg_id_aa64dfr1 = read_cpuid(ID_AA64DFR1_EL1);
+       info->reg_id_aa64isar0 = read_cpuid(ID_AA64ISAR0_EL1);
+       info->reg_id_aa64isar1 = read_cpuid(ID_AA64ISAR1_EL1);
+       info->reg_id_aa64mmfr0 = read_cpuid(ID_AA64MMFR0_EL1);
+       info->reg_id_aa64mmfr1 = read_cpuid(ID_AA64MMFR1_EL1);
+       info->reg_id_aa64mmfr2 = read_cpuid(ID_AA64MMFR2_EL1);
+       info->reg_id_aa64pfr0 = read_cpuid(ID_AA64PFR0_EL1);
+       info->reg_id_aa64pfr1 = read_cpuid(ID_AA64PFR1_EL1);
+
+       info->reg_id_dfr0 = read_cpuid(ID_DFR0_EL1);
+       info->reg_id_isar0 = read_cpuid(ID_ISAR0_EL1);
+       info->reg_id_isar1 = read_cpuid(ID_ISAR1_EL1);
+       info->reg_id_isar2 = read_cpuid(ID_ISAR2_EL1);
+       info->reg_id_isar3 = read_cpuid(ID_ISAR3_EL1);
+       info->reg_id_isar4 = read_cpuid(ID_ISAR4_EL1);
+       info->reg_id_isar5 = read_cpuid(ID_ISAR5_EL1);
+       info->reg_id_mmfr0 = read_cpuid(ID_MMFR0_EL1);
+       info->reg_id_mmfr1 = read_cpuid(ID_MMFR1_EL1);
+       info->reg_id_mmfr2 = read_cpuid(ID_MMFR2_EL1);
+       info->reg_id_mmfr3 = read_cpuid(ID_MMFR3_EL1);
+       info->reg_id_pfr0 = read_cpuid(ID_PFR0_EL1);
+       info->reg_id_pfr1 = read_cpuid(ID_PFR1_EL1);
+
+       info->reg_mvfr0 = read_cpuid(MVFR0_EL1);
+       info->reg_mvfr1 = read_cpuid(MVFR1_EL1);
+       info->reg_mvfr2 = read_cpuid(MVFR2_EL1);
 
        cpuinfo_detect_icache_policy(info);
 

diff --git a/arch/arm64/mm/context.c b/arch/arm64/mm/context.c
index 6c989f0..c90c3c5 100644 (file)
--- a/arch/arm64/mm/context.c
+++ b/arch/arm64/mm/context.c
@@ -45,7 +45,7 @@ static cpumask_t tlb_flush_pending;
 static u32 get_cpu_asid_bits(void)
 {
        u32 asid;
-       int fld = cpuid_feature_extract_unsigned_field(read_cpuid(SYS_ID_AA64MMFR0_EL1),
+       int fld = cpuid_feature_extract_unsigned_field(read_cpuid(ID_AA64MMFR0_EL1),
                                                ID_AA64MMFR0_ASID_SHIFT);
 
        switch (fld) {