From: Philippe Mathieu-Daudé <philmd@linaro.org>
Date: Tue, 28 Oct 2025 05:41:51 +0000 (+0100)
Subject: target/arm/hvf: Simplify hvf_arm_get_host_cpu_features()
X-Git-Tag: v10.2.0-rc1~28^2~15
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=710778695ddc4c3d8834a2d92d9e7ff6292f89c2;p=thirdparty%2Fqemu.git

target/arm/hvf: Simplify hvf_arm_get_host_cpu_features()

Use index in the structure, dereference &host_isar.idregs[] once.

Suggested-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---

diff --git a/target/arm/hvf/hvf.c b/target/arm/hvf/hvf.c
index 890e9266f9..dea1cb37d1 100644
--- a/target/arm/hvf/hvf.c
+++ b/target/arm/hvf/hvf.c
@@ -743,21 +743,21 @@ static void clamp_id_aa64mmfr0_parange_to_ipa_size(ARMISARegisters *isar)
 static bool hvf_arm_get_host_cpu_features(ARMHostCPUFeatures *ahcf)
 {
     ARMISARegisters host_isar = {};
-    const struct isar_regs {
+    static const struct isar_regs {
         int reg;
-        uint64_t *val;
+        ARMIDRegisterIdx index;
     } regs[] = {
-        { HV_SYS_REG_ID_AA64PFR0_EL1, &host_isar.idregs[ID_AA64PFR0_EL1_IDX] },
-        { HV_SYS_REG_ID_AA64PFR1_EL1, &host_isar.idregs[ID_AA64PFR1_EL1_IDX] },
+        { HV_SYS_REG_ID_AA64PFR0_EL1, ID_AA64PFR0_EL1_IDX },
+        { HV_SYS_REG_ID_AA64PFR1_EL1, ID_AA64PFR1_EL1_IDX },
         /* Add ID_AA64PFR2_EL1 here when HVF supports it */
-        { HV_SYS_REG_ID_AA64DFR0_EL1, &host_isar.idregs[ID_AA64DFR0_EL1_IDX] },
-        { HV_SYS_REG_ID_AA64DFR1_EL1, &host_isar.idregs[ID_AA64DFR1_EL1_IDX] },
-        { HV_SYS_REG_ID_AA64ISAR0_EL1, &host_isar.idregs[ID_AA64ISAR0_EL1_IDX] },
-        { HV_SYS_REG_ID_AA64ISAR1_EL1, &host_isar.idregs[ID_AA64ISAR1_EL1_IDX] },
+        { HV_SYS_REG_ID_AA64DFR0_EL1, ID_AA64DFR0_EL1_IDX },
+        { HV_SYS_REG_ID_AA64DFR1_EL1, ID_AA64DFR1_EL1_IDX },
+        { HV_SYS_REG_ID_AA64ISAR0_EL1, ID_AA64ISAR0_EL1_IDX },
+        { HV_SYS_REG_ID_AA64ISAR1_EL1, ID_AA64ISAR1_EL1_IDX },
         /* Add ID_AA64ISAR2_EL1 here when HVF supports it */
-        { HV_SYS_REG_ID_AA64MMFR0_EL1, &host_isar.idregs[ID_AA64MMFR0_EL1_IDX] },
-        { HV_SYS_REG_ID_AA64MMFR1_EL1, &host_isar.idregs[ID_AA64MMFR1_EL1_IDX] },
-        { HV_SYS_REG_ID_AA64MMFR2_EL1, &host_isar.idregs[ID_AA64MMFR2_EL1_IDX] },
+        { HV_SYS_REG_ID_AA64MMFR0_EL1, ID_AA64MMFR0_EL1_IDX },
+        { HV_SYS_REG_ID_AA64MMFR1_EL1, ID_AA64MMFR1_EL1_IDX },
+        { HV_SYS_REG_ID_AA64MMFR2_EL1, ID_AA64MMFR2_EL1_IDX },
         /* Add ID_AA64MMFR3_EL1 here when HVF supports it */
     };
     hv_vcpu_t fd;
@@ -780,7 +780,8 @@ static bool hvf_arm_get_host_cpu_features(ARMHostCPUFeatures *ahcf)
     }
 
     for (i = 0; i < ARRAY_SIZE(regs); i++) {
-        r |= hv_vcpu_get_sys_reg(fd, regs[i].reg, regs[i].val);
+        r |= hv_vcpu_get_sys_reg(fd, regs[i].reg,
+                                 &host_isar.idregs[regs[i].index]);
     }
     r |= hv_vcpu_destroy(fd);