2024-04-18 05:38:45

by Anshuman Khandual

Subject: [PATCH 0/2] arm64: Drop ID_AA64PFR0_EL1_ELx_[64BIT_ONLY|32BIT_64BIT]

This series replaces custom macros usage for ID_AA64PFR0_EL1_ELx_64BIT_ONLY
and ID_AA64PFR0_EL1_ELx_32BIT_64BIT fields, thus finally just dropping them
off completely. This series applies on v6.9-rc4.

Cc: Marc Zyngier <[email protected]>
Cc: Oliver Upton <[email protected]>
Cc: Catalin Marinas <[email protected]>
Cc: Will Deacon <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Mark Brown <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]

Anshuman Khandual (2):
KVM: arm64: Replace custom macros with fields from ID_AA64PFR0_EL1
arm64/cpufeature: Replace custom macros with fields from ID_AA64PFR0_EL1

arch/arm64/include/asm/cpufeature.h | 4 ++--
arch/arm64/include/asm/sysreg.h | 4 ----
arch/arm64/kernel/cpufeature.c | 4 ++--
arch/arm64/kvm/hyp/include/nvhe/fixed_config.h | 8 ++++----
arch/arm64/kvm/hyp/nvhe/pkvm.c | 4 ++--
arch/arm64/kvm/hyp/nvhe/sys_regs.c | 2 +-
6 files changed, 11 insertions(+), 15 deletions(-)

--
2.25.1

2024-04-18 05:39:22

by Anshuman Khandual

Subject: [PATCH 2/2] arm64/cpufeature: Replace custom macros with fields from ID_AA64PFR0_EL1

This replaces custom macros usage (i.e ID_AA64PFR0_EL1_ELx_64BIT_ONLY and
ID_AA64PFR0_EL1_ELx_32BIT_64BIT) and instead directly uses register fields
from ID_AA64PFR0_EL1 sysreg definition. Finally let's drop off both these
custom macros as they are now redundant.

Cc: Catalin Marinas <[email protected]>
Cc: Will Deacon <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Mark Brown <[email protected]>
Cc: [email protected]
Cc: [email protected]
Signed-off-by: Anshuman Khandual <[email protected]>
---
arch/arm64/include/asm/cpufeature.h | 4 ++--
arch/arm64/include/asm/sysreg.h | 4 ----
arch/arm64/kernel/cpufeature.c | 4 ++--
3 files changed, 4 insertions(+), 8 deletions(-)

diff --git a/arch/arm64/include/asm/cpufeature.h b/arch/arm64/include/asm/cpufeature.h
index 8b904a757bd3..558434267271 100644
--- a/arch/arm64/include/asm/cpufeature.h
+++ b/arch/arm64/include/asm/cpufeature.h
@@ -588,14 +588,14 @@ static inline bool id_aa64pfr0_32bit_el1(u64 pfr0)
{
u32 val = cpuid_feature_extract_unsigned_field(pfr0, ID_AA64PFR0_EL1_EL1_SHIFT);

- return val == ID_AA64PFR0_EL1_ELx_32BIT_64BIT;
+ return val == ID_AA64PFR0_EL1_EL1_AARCH32;
}

static inline bool id_aa64pfr0_32bit_el0(u64 pfr0)
{
u32 val = cpuid_feature_extract_unsigned_field(pfr0, ID_AA64PFR0_EL1_EL0_SHIFT);

- return val == ID_AA64PFR0_EL1_ELx_32BIT_64BIT;
+ return val == ID_AA64PFR0_EL1_EL0_AARCH32;
}

static inline bool id_aa64pfr0_sve(u64 pfr0)
diff --git a/arch/arm64/include/asm/sysreg.h b/arch/arm64/include/asm/sysreg.h
index 9e8999592f3a..1199185a3da9 100644
--- a/arch/arm64/include/asm/sysreg.h
+++ b/arch/arm64/include/asm/sysreg.h
@@ -872,10 +872,6 @@
/* Position the attr at the correct index */
#define MAIR_ATTRIDX(attr, idx) ((attr) << ((idx) * 8))

-/* id_aa64pfr0 */
-#define ID_AA64PFR0_EL1_ELx_64BIT_ONLY 0x1
-#define ID_AA64PFR0_EL1_ELx_32BIT_64BIT 0x2
-
/* id_aa64mmfr0 */
#define ID_AA64MMFR0_EL1_TGRAN4_SUPPORTED_MIN 0x0
#define ID_AA64MMFR0_EL1_TGRAN4_LPA2 ID_AA64MMFR0_EL1_TGRAN4_52_BIT
diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
index 56583677c1f2..c041b0958f53 100644
--- a/arch/arm64/kernel/cpufeature.c
+++ b/arch/arm64/kernel/cpufeature.c
@@ -285,8 +285,8 @@ static const struct arm64_ftr_bits ftr_id_aa64pfr0[] = {
S_ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64PFR0_EL1_FP_SHIFT, 4, ID_AA64PFR0_EL1_FP_NI),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_NONSTRICT, FTR_LOWER_SAFE, ID_AA64PFR0_EL1_EL3_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_NONSTRICT, FTR_LOWER_SAFE, ID_AA64PFR0_EL1_EL2_SHIFT, 4, 0),
- ARM64_FTR_BITS(FTR_HIDDEN, FTR_NONSTRICT, FTR_LOWER_SAFE, ID_AA64PFR0_EL1_EL1_SHIFT, 4, ID_AA64PFR0_EL1_ELx_64BIT_ONLY),
- ARM64_FTR_BITS(FTR_HIDDEN, FTR_NONSTRICT, FTR_LOWER_SAFE, ID_AA64PFR0_EL1_EL0_SHIFT, 4, ID_AA64PFR0_EL1_ELx_64BIT_ONLY),
+ ARM64_FTR_BITS(FTR_HIDDEN, FTR_NONSTRICT, FTR_LOWER_SAFE, ID_AA64PFR0_EL1_EL1_SHIFT, 4, ID_AA64PFR0_EL1_EL1_IMP),
+ ARM64_FTR_BITS(FTR_HIDDEN, FTR_NONSTRICT, FTR_LOWER_SAFE, ID_AA64PFR0_EL1_EL0_SHIFT, 4, ID_AA64PFR0_EL1_EL0_IMP),
ARM64_FTR_END,
};

--
2.25.1

2024-05-09 04:44:34

by Anshuman Khandual

Subject: Re: [PATCH 0/2] arm64: Drop ID_AA64PFR0_EL1_ELx_[64BIT_ONLY|32BIT_64BIT]

On 4/18/24 11:08, Anshuman Khandual wrote:
> This series replaces custom macros usage for ID_AA64PFR0_EL1_ELx_64BIT_ONLY
> and ID_AA64PFR0_EL1_ELx_32BIT_64BIT fields, thus finally just dropping them
> off completely. This series applies on v6.9-rc4.
>
> Cc: Marc Zyngier <[email protected]>
> Cc: Oliver Upton <[email protected]>
> Cc: Catalin Marinas <[email protected]>
> Cc: Will Deacon <[email protected]>
> Cc: Mark Rutland <[email protected]>
> Cc: Mark Brown <[email protected]>
> Cc: [email protected]
> Cc: [email protected]
> Cc: [email protected]
>
> Anshuman Khandual (2):
> KVM: arm64: Replace custom macros with fields from ID_AA64PFR0_EL1
> arm64/cpufeature: Replace custom macros with fields from ID_AA64PFR0_EL1

Hello All,

I am bit confused here, is there something more that needs to be done. It
seems like the previous discussion thread remained some what inconclusive.
Please do let me know. Thank you.

- Anshuman