[PATCH v3 3/8] RISC-V: KVM: Drop the _MASK suffix from hgatp.VMID mask defines

Anup Patel
2023-04-03T09:34:15Z

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>
Reviewed-by: Atish Patra <atishp@rivosinc.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 46d692995830..f2eb47925806 100644
--- a/arch/riscv/kvm/mmu.c
+++ b/arch/riscv/kvm/mmu.c
@@ -755,8 +755,7 @@ 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 5246da1c9167..ddc98714ce8e 100644
--- a/arch/riscv/kvm/vmid.c
+++ b/arch/riscv/kvm/vmid.c
@@ -26,9 +26,9 @@ void __init 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