Re: [Qemu-devel] [PATCH qom v3 3/4] arm: boot: Use cpu_set_pc()

["Andreas Färber" <afaerber@suse.de>]

Am 24.06.2015 um 05:19 schrieb Peter Crosthwaite:
> Use cpu_set_pc() across the board for setting program counters. This
> removes instances of system level code having to reach into the CPU
> env.
> 
> Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
> Reviewed-by: Andreas Färber <afaerber@suse.de>
> Signed-off-by: Peter Crosthwaite <crosthwaite.peter@gmail.com>
> ---
> Changed since v2:
> Add () to fn names in commit msg
> Drop error argument
> Changed since v1:
> Lease thumb masking in boot.c
> ---
>  hw/arm/boot.c | 19 +++++++------------
>  1 file changed, 7 insertions(+), 12 deletions(-)

Any objection to avoiding repeated casts as follows?

--- a/hw/arm/boot.c
+++ b/hw/arm/boot.c
@@ -168,9 +168,11 @@ static void default_write_secondary(ARMCPU *cpu,
 static void default_reset_secondary(ARMCPU *cpu,
                                     const struct arm_boot_info *info)
 {
+    CPUState *cs = CPU(cpu);
+
     address_space_stl_notdirty(&address_space_memory,
info->smp_bootreg_addr,
                                0, MEMTXATTRS_UNSPECIFIED, NULL);
-    cpu_set_pc(CPU(cpu), info->smp_loader_start);
+    cpu_set_pc(cs, info->smp_loader_start);
 }

 static inline bool have_dtb(const struct arm_boot_info *info)
@@ -443,10 +445,11 @@ fail:
 static void do_cpu_reset(void *opaque)
 {
     ARMCPU *cpu = opaque;
+    CPUState *cs = CPU(cpu);
     CPUARMState *env = &cpu->env;
     const struct arm_boot_info *info = env->boot_info;

-    cpu_reset(CPU(cpu));
+    cpu_reset(cs);
     if (info) {
         if (!info->is_linux) {
             /* Jump to the entry point.  */
@@ -456,7 +459,7 @@ static void do_cpu_reset(void *opaque)
                 env->thumb = info->entry & 1;
                 entry &= 0xfffffffe;
             }
-            cpu_set_pc(CPU(cpu), entry);
+            cpu_set_pc(cs, entry);
         } else {
             /* If we are booting Linux then we need to check whether we are
              * booting into secure or non-secure state and adjust the state
@@ -486,8 +489,8 @@ static void do_cpu_reset(void *opaque)
                 }
             }

-            if (CPU(cpu) == first_cpu) {
-                cpu_set_pc(CPU(cpu), info->loader_start);
+            if (cs == first_cpu) {
+                cpu_set_pc(cs, info->loader_start);

                 if (!have_dtb(info)) {
                     if (old_param) {

Regards,
Andreas

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