diff mbox series

[v2,3/7] RISC-V: KVM: Drop the _MASK suffix from hgatp.VMID mask defines

Message ID 20230128072737.2995881-4-apatel@ventanamicro.com (mailing list archive)
State Handled Elsewhere
Headers show
Series RISC-V KVM virtualize AIA CSRs | expand

Checks

Context Check Description
conchuod/tree_selection fail Failed to apply to next/pending-fixes or riscv/for-next

Commit Message

Anup Patel Jan. 28, 2023, 7:27 a.m. UTC 
The hgatp.VMID mask defines are used before shifting when extracting
VMID value from hgatp CSR value so based on the convention followed
in the other parts of asm/csr.h, the hgatp.VMID mask defines should
not have a _MASK suffix.

While we are here, let's use GENMASK() for hgatp.VMID and hgatp.PPN.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
---
 arch/riscv/include/asm/csr.h | 12 ++++++------
 arch/riscv/kvm/mmu.c         |  3 +--
 arch/riscv/kvm/vmid.c        |  4 ++--
 3 files changed, 9 insertions(+), 10 deletions(-)

Comments

Atish Patra Jan. 31, 2023, 9:27 a.m. UTC | #1 
On Fri, Jan 27, 2023 at 11:28 PM Anup Patel <apatel@ventanamicro.com> wrote:
>
> The hgatp.VMID mask defines are used before shifting when extracting
> VMID value from hgatp CSR value so based on the convention followed
> in the other parts of asm/csr.h, the hgatp.VMID mask defines should
> not have a _MASK suffix.
>
> While we are here, let's use GENMASK() for hgatp.VMID and hgatp.PPN.
>
> Signed-off-by: Anup Patel <apatel@ventanamicro.com>
> Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
> ---
>  arch/riscv/include/asm/csr.h | 12 ++++++------
>  arch/riscv/kvm/mmu.c         |  3 +--
>  arch/riscv/kvm/vmid.c        |  4 ++--
>  3 files changed, 9 insertions(+), 10 deletions(-)
>
> diff --git a/arch/riscv/include/asm/csr.h b/arch/riscv/include/asm/csr.h
> index 3c8d68152bce..3176355cf4e9 100644
> --- a/arch/riscv/include/asm/csr.h
> +++ b/arch/riscv/include/asm/csr.h
> @@ -131,25 +131,25 @@
>
>  #define HGATP32_MODE_SHIFT     31
>  #define HGATP32_VMID_SHIFT     22
> -#define HGATP32_VMID_MASK      _AC(0x1FC00000, UL)
> -#define HGATP32_PPN            _AC(0x003FFFFF, UL)
> +#define HGATP32_VMID           GENMASK(28, 22)
> +#define HGATP32_PPN            GENMASK(21, 0)
>
>  #define HGATP64_MODE_SHIFT     60
>  #define HGATP64_VMID_SHIFT     44
> -#define HGATP64_VMID_MASK      _AC(0x03FFF00000000000, UL)
> -#define HGATP64_PPN            _AC(0x00000FFFFFFFFFFF, UL)
> +#define HGATP64_VMID           GENMASK(57, 44)
> +#define HGATP64_PPN            GENMASK(43, 0)
>
>  #define HGATP_PAGE_SHIFT       12
>
>  #ifdef CONFIG_64BIT
>  #define HGATP_PPN              HGATP64_PPN
>  #define HGATP_VMID_SHIFT       HGATP64_VMID_SHIFT
> -#define HGATP_VMID_MASK                HGATP64_VMID_MASK
> +#define HGATP_VMID             HGATP64_VMID
>  #define HGATP_MODE_SHIFT       HGATP64_MODE_SHIFT
>  #else
>  #define HGATP_PPN              HGATP32_PPN
>  #define HGATP_VMID_SHIFT       HGATP32_VMID_SHIFT
> -#define HGATP_VMID_MASK                HGATP32_VMID_MASK
> +#define HGATP_VMID             HGATP32_VMID
>  #define HGATP_MODE_SHIFT       HGATP32_MODE_SHIFT
>  #endif
>
> diff --git a/arch/riscv/kvm/mmu.c b/arch/riscv/kvm/mmu.c
> index dbc4ca060174..829a7065ae01 100644
> --- a/arch/riscv/kvm/mmu.c
> +++ b/arch/riscv/kvm/mmu.c
> @@ -748,8 +748,7 @@ void kvm_riscv_gstage_update_hgatp(struct kvm_vcpu *vcpu)
>         unsigned long hgatp = gstage_mode;
>         struct kvm_arch *k = &vcpu->kvm->arch;
>
> -       hgatp |= (READ_ONCE(k->vmid.vmid) << HGATP_VMID_SHIFT) &
> -                HGATP_VMID_MASK;
> +       hgatp |= (READ_ONCE(k->vmid.vmid) << HGATP_VMID_SHIFT) & HGATP_VMID;
>         hgatp |= (k->pgd_phys >> PAGE_SHIFT) & HGATP_PPN;
>
>         csr_write(CSR_HGATP, hgatp);
> diff --git a/arch/riscv/kvm/vmid.c b/arch/riscv/kvm/vmid.c
> index 6cd93995fb65..6f4d4979a759 100644
> --- a/arch/riscv/kvm/vmid.c
> +++ b/arch/riscv/kvm/vmid.c
> @@ -26,9 +26,9 @@ void kvm_riscv_gstage_vmid_detect(void)
>
>         /* Figure-out number of VMID bits in HW */
>         old = csr_read(CSR_HGATP);
> -       csr_write(CSR_HGATP, old | HGATP_VMID_MASK);
> +       csr_write(CSR_HGATP, old | HGATP_VMID);
>         vmid_bits = csr_read(CSR_HGATP);
> -       vmid_bits = (vmid_bits & HGATP_VMID_MASK) >> HGATP_VMID_SHIFT;
> +       vmid_bits = (vmid_bits & HGATP_VMID) >> HGATP_VMID_SHIFT;
>         vmid_bits = fls_long(vmid_bits);
>         csr_write(CSR_HGATP, old);
>
> --
> 2.34.1
>

Reviewed-by: Atish Patra <atishp@rivosinc.com>
diff mbox series

Patch

diff --git a/arch/riscv/include/asm/csr.h b/arch/riscv/include/asm/csr.h
index 3c8d68152bce..3176355cf4e9 100644
--- a/arch/riscv/include/asm/csr.h
+++ b/arch/riscv/include/asm/csr.h
@@ -131,25 +131,25 @@ 
 
 #define HGATP32_MODE_SHIFT	31
 #define HGATP32_VMID_SHIFT	22
-#define HGATP32_VMID_MASK	_AC(0x1FC00000, UL)
-#define HGATP32_PPN		_AC(0x003FFFFF, UL)
+#define HGATP32_VMID		GENMASK(28, 22)
+#define HGATP32_PPN		GENMASK(21, 0)
 
 #define HGATP64_MODE_SHIFT	60
 #define HGATP64_VMID_SHIFT	44
-#define HGATP64_VMID_MASK	_AC(0x03FFF00000000000, UL)
-#define HGATP64_PPN		_AC(0x00000FFFFFFFFFFF, UL)
+#define HGATP64_VMID		GENMASK(57, 44)
+#define HGATP64_PPN		GENMASK(43, 0)
 
 #define HGATP_PAGE_SHIFT	12
 
 #ifdef CONFIG_64BIT
 #define HGATP_PPN		HGATP64_PPN
 #define HGATP_VMID_SHIFT	HGATP64_VMID_SHIFT
-#define HGATP_VMID_MASK		HGATP64_VMID_MASK
+#define HGATP_VMID		HGATP64_VMID
 #define HGATP_MODE_SHIFT	HGATP64_MODE_SHIFT
 #else
 #define HGATP_PPN		HGATP32_PPN
 #define HGATP_VMID_SHIFT	HGATP32_VMID_SHIFT
-#define HGATP_VMID_MASK		HGATP32_VMID_MASK
+#define HGATP_VMID		HGATP32_VMID
 #define HGATP_MODE_SHIFT	HGATP32_MODE_SHIFT
 #endif
 
diff --git a/arch/riscv/kvm/mmu.c b/arch/riscv/kvm/mmu.c
index dbc4ca060174..829a7065ae01 100644
--- a/arch/riscv/kvm/mmu.c
+++ b/arch/riscv/kvm/mmu.c
@@ -748,8 +748,7 @@  void kvm_riscv_gstage_update_hgatp(struct kvm_vcpu *vcpu)
 	unsigned long hgatp = gstage_mode;
 	struct kvm_arch *k = &vcpu->kvm->arch;
 
-	hgatp |= (READ_ONCE(k->vmid.vmid) << HGATP_VMID_SHIFT) &
-		 HGATP_VMID_MASK;
+	hgatp |= (READ_ONCE(k->vmid.vmid) << HGATP_VMID_SHIFT) & HGATP_VMID;
 	hgatp |= (k->pgd_phys >> PAGE_SHIFT) & HGATP_PPN;
 
 	csr_write(CSR_HGATP, hgatp);
diff --git a/arch/riscv/kvm/vmid.c b/arch/riscv/kvm/vmid.c
index 6cd93995fb65..6f4d4979a759 100644
--- a/arch/riscv/kvm/vmid.c
+++ b/arch/riscv/kvm/vmid.c
@@ -26,9 +26,9 @@  void kvm_riscv_gstage_vmid_detect(void)
 
 	/* Figure-out number of VMID bits in HW */
 	old = csr_read(CSR_HGATP);
-	csr_write(CSR_HGATP, old | HGATP_VMID_MASK);
+	csr_write(CSR_HGATP, old | HGATP_VMID);
 	vmid_bits = csr_read(CSR_HGATP);
-	vmid_bits = (vmid_bits & HGATP_VMID_MASK) >> HGATP_VMID_SHIFT;
+	vmid_bits = (vmid_bits & HGATP_VMID) >> HGATP_VMID_SHIFT;
 	vmid_bits = fls_long(vmid_bits);
 	csr_write(CSR_HGATP, old);