target/riscv/kvm: change KVM_REG_RISCV_FP_D to u64

KVM_REG_RISCV_FP_D regs are always u64 size. Using kvm_riscv_reg_id() in
RISCV_FP_D_REG() ends up encoding the wrong size if we're running with
TARGET_RISCV32.

Create a new helper that returns a KVM ID with u64 size and use it with
RISCV_FP_D_REG().

Reported-by: Andrew Jones <ajones@ventanamicro.com>
Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Message-ID: <20231208183835.2411523-3-dbarboza@ventanamicro.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
(cherry picked from commit 450bd66)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

target/riscv/kvm/kvm-cpu.c

@@ -77,6 +77,11 @@ static uint64_t kvm_riscv_reg_id_u32(uint64_t type, uint64_t idx)
     return KVM_REG_RISCV | KVM_REG_SIZE_U32 | type | idx;
 }
 
+static uint64_t kvm_riscv_reg_id_u64(uint64_t type, uint64_t idx)
+{
+    return KVM_REG_RISCV | KVM_REG_SIZE_U64 | type | idx;
+}
+
 #define RISCV_CORE_REG(env, name)  kvm_riscv_reg_id(env, KVM_REG_RISCV_CORE, \
                  KVM_REG_RISCV_CORE_REG(name))
 
@@ -88,7 +93,7 @@ static uint64_t kvm_riscv_reg_id_u32(uint64_t type, uint64_t idx)
 
 #define RISCV_FP_F_REG(idx)  kvm_riscv_reg_id_u32(KVM_REG_RISCV_FP_F, idx)
 
-#define RISCV_FP_D_REG(env, idx)  kvm_riscv_reg_id(env, KVM_REG_RISCV_FP_D, idx)
+#define RISCV_FP_D_REG(idx)  kvm_riscv_reg_id_u64(KVM_REG_RISCV_FP_D, idx)
 
 #define KVM_RISCV_GET_CSR(cs, env, csr, reg) \
     do { \
@@ -579,7 +584,7 @@ static int kvm_riscv_get_regs_fp(CPUState *cs)
     if (riscv_has_ext(env, RVD)) {
         uint64_t reg;
         for (i = 0; i < 32; i++) {
-            ret = kvm_get_one_reg(cs, RISCV_FP_D_REG(env, i), &reg);
+            ret = kvm_get_one_reg(cs, RISCV_FP_D_REG(i), &reg);
             if (ret) {
                 return ret;
             }
@@ -613,7 +618,7 @@ static int kvm_riscv_put_regs_fp(CPUState *cs)
         uint64_t reg;
         for (i = 0; i < 32; i++) {
             reg = env->fpr[i];
-            ret = kvm_set_one_reg(cs, RISCV_FP_D_REG(env, i), &reg);
+            ret = kvm_set_one_reg(cs, RISCV_FP_D_REG(i), &reg);
             if (ret) {
                 return ret;
             }