diff mbox series

[v2,04/26] target/arm/hvf: Simplify GIC hvf_arch_init_vcpu()

Message ID 20250620130709.31073-5-philmd@linaro.org
State New
Headers show
Series arm: Fixes and preparatory cleanups for split-accel | expand

Commit Message

Philippe Mathieu-Daudé June 20, 2025, 1:06 p.m. UTC 
Only update the ID_AA64PFR0_EL1 register when a GIC is provided.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 target/arm/hvf/hvf.c | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

Comments

Richard Henderson June 22, 2025, 12:40 a.m. UTC | #1 
On 6/20/25 06:06, Philippe Mathieu-Daudé wrote:
> Only update the ID_AA64PFR0_EL1 register when a GIC is provided.
> 
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> ---
>   target/arm/hvf/hvf.c | 14 +++++++++-----
>   1 file changed, 9 insertions(+), 5 deletions(-)

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

r~
diff mbox series

Patch

diff --git a/target/arm/hvf/hvf.c b/target/arm/hvf/hvf.c
index 42258cc2d88..c1ed8b510db 100644
--- a/target/arm/hvf/hvf.c
+++ b/target/arm/hvf/hvf.c
@@ -1057,11 +1057,15 @@  int hvf_arch_init_vcpu(CPUState *cpu)
                               arm_cpu->mp_affinity);
     assert_hvf_ok(ret);
 
-    ret = hv_vcpu_get_sys_reg(cpu->accel->fd, HV_SYS_REG_ID_AA64PFR0_EL1, &pfr);
-    assert_hvf_ok(ret);
-    pfr |= env->gicv3state ? (1 << 24) : 0;
-    ret = hv_vcpu_set_sys_reg(cpu->accel->fd, HV_SYS_REG_ID_AA64PFR0_EL1, pfr);
-    assert_hvf_ok(ret);
+    if (env->gicv3state) {
+        ret = hv_vcpu_get_sys_reg(cpu->accel->fd,
+                                  HV_SYS_REG_ID_AA64PFR0_EL1, &pfr);
+        assert_hvf_ok(ret);
+        pfr = FIELD_DP64(pfr, ID_AA64PFR0, GIC, 1);
+        ret = hv_vcpu_set_sys_reg(cpu->accel->fd,
+                                  HV_SYS_REG_ID_AA64PFR0_EL1, pfr);
+        assert_hvf_ok(ret);
+    }
 
     /* We're limited to underlying hardware caps, override internal versions */
     ret = hv_vcpu_get_sys_reg(cpu->accel->fd, HV_SYS_REG_ID_AA64MMFR0_EL1,