Re: [PATCH v5 4/6] hw/arm/virt: Introduce virt_get_high_memmap_enabled() helper

[Eric Auger <eric.auger@redhat.com>]

On 10/12/22 01:18, Gavin Shan wrote:
> This introduces virt_get_high_memmap_enabled() helper, which returns
> the pointer to vms->highmem_{redists, ecam, mmio}. The pointer will
> be used in the subsequent patches.
>
> No functional change intended.
>
> Signed-off-by: Gavin Shan <gshan@redhat.com>
> Tested-by: Zhenyu Zhang <zhenyzha@redhat.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>


Eric
> ---
>  hw/arm/virt.c | 32 +++++++++++++++++++-------------
>  1 file changed, 19 insertions(+), 13 deletions(-)
>
> diff --git a/hw/arm/virt.c b/hw/arm/virt.c
> index 0bf3cb7057..ee98a8a3b6 100644
> --- a/hw/arm/virt.c
> +++ b/hw/arm/virt.c
> @@ -1689,14 +1689,31 @@ static uint64_t virt_cpu_mp_affinity(VirtMachineState *vms, int idx)
>      return arm_cpu_mp_affinity(idx, clustersz);
>  }
>  
> +static inline bool *virt_get_high_memmap_enabled(VirtMachineState *vms,
> +                                                 int index)
> +{
> +    bool *enabled_array[] = {
> +        &vms->highmem_redists,
> +        &vms->highmem_ecam,
> +        &vms->highmem_mmio,
> +    };
> +
> +    assert(ARRAY_SIZE(extended_memmap) - VIRT_LOWMEMMAP_LAST ==
> +           ARRAY_SIZE(enabled_array));
> +    assert(index - VIRT_LOWMEMMAP_LAST < ARRAY_SIZE(enabled_array));
> +
> +    return enabled_array[index - VIRT_LOWMEMMAP_LAST];
> +}
> +
>  static void virt_set_high_memmap(VirtMachineState *vms,
>                                   hwaddr base, int pa_bits)
>  {
>      hwaddr region_base, region_size;
> -    bool fits;
> +    bool *region_enabled, fits;
>      int i;
>  
>      for (i = VIRT_LOWMEMMAP_LAST; i < ARRAY_SIZE(extended_memmap); i++) {
> +        region_enabled = virt_get_high_memmap_enabled(vms, i);
>          region_base = ROUND_UP(base, extended_memmap[i].size);
>          region_size = extended_memmap[i].size;
>  
> @@ -1714,18 +1731,7 @@ static void virt_set_high_memmap(VirtMachineState *vms,
>              vms->highest_gpa = region_base + region_size - 1;
>          }
>  
> -        switch (i) {
> -        case VIRT_HIGH_GIC_REDIST2:
> -            vms->highmem_redists &= fits;
> -            break;
> -        case VIRT_HIGH_PCIE_ECAM:
> -            vms->highmem_ecam &= fits;
> -            break;
> -        case VIRT_HIGH_PCIE_MMIO:
> -            vms->highmem_mmio &= fits;
> -            break;
> -        }
> -
> +        *region_enabled &= fits;
>          base = region_base + region_size;
>      }
>  }