[PATCH 2/2] arm64/mm: Directly use TTBRx_EL1_CnP

[Anshuman Khandual]

Replace all TTBR_CNP_BIT macro instances with TTBRx_EL1_CNP_BIT which
is a standard field from tools sysreg format. Drop the now redundant
custom macro TTBR_CNP_BIT. No functional change.

Cc: Catalin Marinas <catalin.marinas at arm.com>
Cc: Will Deacon <will at kernel.org>
Cc: Marc Zyngier <maz at kernel.org>
Cc: Oliver Upton <oupton at kernel.org>
Cc: linux-arm-kernel at lists.infradead.org
Cc: linux-kernel at vger.kernel.org
Cc: kvmarm at lists.linux.dev
Signed-off-by: Anshuman Khandual <anshuman.khandual at arm.com>
---
 arch/arm64/include/asm/pgtable-hwdef.h | 2 --
 arch/arm64/kernel/mte.c                | 4 ++--
 arch/arm64/kvm/hyp/nvhe/hyp-init.S     | 4 ++--
 arch/arm64/mm/context.c                | 2 +-
 arch/arm64/mm/mmu.c                    | 2 +-
 5 files changed, 6 insertions(+), 8 deletions(-)

diff --git a/arch/arm64/include/asm/pgtable-hwdef.h b/arch/arm64/include/asm/pgtable-hwdef.h
index d49180bb7cb3..5e6809a462c7 100644
--- a/arch/arm64/include/asm/pgtable-hwdef.h
+++ b/arch/arm64/include/asm/pgtable-hwdef.h
@@ -223,8 +223,6 @@
  */
 #define S1_TABLE_AP		(_AT(pmdval_t, 3) << 61)
 
-#define TTBR_CNP_BIT		(UL(1) << 0)
-
 /*
  * TCR flags.
  */
diff --git a/arch/arm64/kernel/mte.c b/arch/arm64/kernel/mte.c
index 32148bf09c1d..eceead1686f2 100644
--- a/arch/arm64/kernel/mte.c
+++ b/arch/arm64/kernel/mte.c
@@ -315,8 +315,8 @@ void mte_cpu_setup(void)
 	 * CnP is not a boot feature so MTE gets enabled before CnP, but let's
 	 * make sure that is the case.
 	 */
-	BUG_ON(read_sysreg(ttbr0_el1) & TTBR_CNP_BIT);
-	BUG_ON(read_sysreg(ttbr1_el1) & TTBR_CNP_BIT);
+	BUG_ON(read_sysreg(ttbr0_el1) & TTBRx_EL1_CnP);
+	BUG_ON(read_sysreg(ttbr1_el1) & TTBRx_EL1_CnP);
 
 	/* Normal Tagged memory type at the corresponding MAIR index */
 	sysreg_clear_set(mair_el1,
diff --git a/arch/arm64/kvm/hyp/nvhe/hyp-init.S b/arch/arm64/kvm/hyp/nvhe/hyp-init.S
index 0d42eedc7167..445eb0743af2 100644
--- a/arch/arm64/kvm/hyp/nvhe/hyp-init.S
+++ b/arch/arm64/kvm/hyp/nvhe/hyp-init.S
@@ -130,7 +130,7 @@ SYM_CODE_START_LOCAL(___kvm_hyp_init)
 	ldr	x1, [x0, #NVHE_INIT_PGD_PA]
 	phys_to_ttbr x2, x1
 alternative_if ARM64_HAS_CNP
-	orr	x2, x2, #TTBR_CNP_BIT
+	orr	x2, x2, #TTBRx_EL1_CnP
 alternative_else_nop_endif
 	msr	ttbr0_el2, x2
 
@@ -291,7 +291,7 @@ SYM_TYPED_FUNC_START(__pkvm_init_switch_pgd)
 	/* Install the new pgtables */
 	phys_to_ttbr x5, x0
 alternative_if ARM64_HAS_CNP
-	orr	x5, x5, #TTBR_CNP_BIT
+	orr	x5, x5, #TTBRx_EL1_CnP
 alternative_else_nop_endif
 	msr	ttbr0_el2, x5
 
diff --git a/arch/arm64/mm/context.c b/arch/arm64/mm/context.c
index 718c495832d0..0f4a28b87469 100644
--- a/arch/arm64/mm/context.c
+++ b/arch/arm64/mm/context.c
@@ -354,7 +354,7 @@ void cpu_do_switch_mm(phys_addr_t pgd_phys, struct mm_struct *mm)
 
 	/* Skip CNP for the reserved ASID */
 	if (system_supports_cnp() && asid)
-		ttbr0 |= TTBR_CNP_BIT;
+		ttbr0 |= TTBRx_EL1_CnP;
 
 	/* SW PAN needs a copy of the ASID in TTBR0 for entry */
 	if (IS_ENABLED(CONFIG_ARM64_SW_TTBR0_PAN))
diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c
index a6a00accf4f9..c22678769c37 100644
--- a/arch/arm64/mm/mmu.c
+++ b/arch/arm64/mm/mmu.c
@@ -2188,7 +2188,7 @@ void __cpu_replace_ttbr1(pgd_t *pgdp, bool cnp)
 	phys_addr_t ttbr1 = phys_to_ttbr(virt_to_phys(pgdp));
 
 	if (cnp)
-		ttbr1 |= TTBR_CNP_BIT;
+		ttbr1 |= TTBRx_EL1_CnP;
 
 	replace_phys = (void *)__pa_symbol(idmap_cpu_replace_ttbr1);
 
-- 
2.30.2