Re: [Qemu-devel] [PATCH v2 1/4] pc: Remove redundant arguments from xen_hvm_init()

[Marcel Apfelbaum <marcel.apfelbaum@gmail.com>]

On 08/17/2015 09:42 PM, Eduardo Habkost wrote:
> Remove arguments that can be found in PCMachineState.
>
> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
> ---
> Changes v1 -> v2:
> * Change prototype on xen-hvm-stub.c too
> ---
>   hw/i386/pc_piix.c    |  4 +---
>   hw/i386/pc_q35.c     |  4 +---
>   include/hw/xen/xen.h |  4 ++--
>   xen-hvm-stub.c       |  3 +--
>   xen-hvm.c            | 25 ++++++++++++-------------
>   5 files changed, 17 insertions(+), 23 deletions(-)
>
> diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
> index 9558467..2b7afc8 100644
> --- a/hw/i386/pc_piix.c
> +++ b/hw/i386/pc_piix.c
> @@ -134,9 +134,7 @@ static void pc_init1(MachineState *machine)
>           pcms->below_4g_mem_size = machine->ram_size;
>       }
>
> -    if (xen_enabled() && xen_hvm_init(&pcms->below_4g_mem_size,
> -                                      &pcms->above_4g_mem_size,
> -                                      &ram_memory) != 0) {
> +    if (xen_enabled() && xen_hvm_init(pcms, &ram_memory) != 0) {
>           fprintf(stderr, "xen hardware virtual machine initialisation failed\n");
>           exit(1);
>       }
> diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c
> index c07d65b..36dd6a4 100644
> --- a/hw/i386/pc_q35.c
> +++ b/hw/i386/pc_q35.c
> @@ -125,9 +125,7 @@ static void pc_q35_init(MachineState *machine)
>           pcms->below_4g_mem_size = machine->ram_size;
>       }
>
> -    if (xen_enabled() && xen_hvm_init(&pcms->below_4g_mem_size,
> -                                      &pcms->above_4g_mem_size,
> -                                      &ram_memory) != 0) {
> +    if (xen_enabled() && xen_hvm_init(pcms, &ram_memory) != 0) {
>           fprintf(stderr, "xen hardware virtual machine initialisation failed\n");
>           exit(1);
>       }
> diff --git a/include/hw/xen/xen.h b/include/hw/xen/xen.h
> index 4356af4..e90931a 100644
> --- a/include/hw/xen/xen.h
> +++ b/include/hw/xen/xen.h
> @@ -10,6 +10,7 @@
>
>   #include "hw/irq.h"
>   #include "qemu-common.h"
> +#include "qemu/typedefs.h"
>
>   /* xen-machine.c */
>   enum xen_mode {
> @@ -38,8 +39,7 @@ qemu_irq *xen_interrupt_controller_init(void);
>   void xenstore_store_pv_console_info(int i, struct CharDriverState *chr);
>
>   #if defined(NEED_CPU_H) && !defined(CONFIG_USER_ONLY)
> -int xen_hvm_init(ram_addr_t *below_4g_mem_size, ram_addr_t *above_4g_mem_size,
> -                 MemoryRegion **ram_memory);
> +int xen_hvm_init(PCMachineState *pcms, MemoryRegion **ram_memory);
>   void xen_ram_alloc(ram_addr_t ram_addr, ram_addr_t size,
>                      struct MemoryRegion *mr);
>   void xen_modified_memory(ram_addr_t start, ram_addr_t length);
> diff --git a/xen-hvm-stub.c b/xen-hvm-stub.c
> index 46867d8..6a39425 100644
> --- a/xen-hvm-stub.c
> +++ b/xen-hvm-stub.c
> @@ -47,8 +47,7 @@ void xen_modified_memory(ram_addr_t start, ram_addr_t length)
>   {
>   }
>
> -int xen_hvm_init(ram_addr_t *below_4g_mem_size, ram_addr_t *above_4g_mem_size,
> -                 MemoryRegion **ram_memory)
> +int xen_hvm_init(PCMachineState *pcms, MemoryRegion **ram_memory)
>   {
>       return 0;
>   }
> diff --git a/xen-hvm.c b/xen-hvm.c
> index 0408462..55bce3a 100644
> --- a/xen-hvm.c
> +++ b/xen-hvm.c
> @@ -180,8 +180,7 @@ qemu_irq *xen_interrupt_controller_init(void)
>
>   /* Memory Ops */
>
> -static void xen_ram_init(ram_addr_t *below_4g_mem_size,
> -                         ram_addr_t *above_4g_mem_size,
> +static void xen_ram_init(PCMachineState *pcms,
>                            ram_addr_t ram_size, MemoryRegion **ram_memory_p)
>   {
>       MemoryRegion *sysmem = get_system_memory();
> @@ -198,20 +197,20 @@ static void xen_ram_init(ram_addr_t *below_4g_mem_size,
>       }
>
>       if (ram_size >= user_lowmem) {
> -        *above_4g_mem_size = ram_size - user_lowmem;
> -        *below_4g_mem_size = user_lowmem;
> +        pcms->above_4g_mem_size = ram_size - user_lowmem;
> +        pcms->below_4g_mem_size = user_lowmem;
>       } else {
> -        *above_4g_mem_size = 0;
> -        *below_4g_mem_size = ram_size;
> +        pcms->above_4g_mem_size = 0;
> +        pcms->below_4g_mem_size = ram_size;
>       }
> -    if (!*above_4g_mem_size) {
> +    if (!pcms->above_4g_mem_size) {
>           block_len = ram_size;
>       } else {
>           /*
>            * Xen does not allocate the memory continuously, it keeps a
>            * hole of the size computed above or passed in.
>            */
> -        block_len = (1ULL << 32) + *above_4g_mem_size;
> +        block_len = (1ULL << 32) + pcms->above_4g_mem_size;
>       }
>       memory_region_init_ram(&ram_memory, NULL, "xen.ram", block_len,
>                              &error_abort);
> @@ -229,12 +228,12 @@ static void xen_ram_init(ram_addr_t *below_4g_mem_size,
>        */
>       memory_region_init_alias(&ram_lo, NULL, "xen.ram.lo",
>                                &ram_memory, 0xc0000,
> -                             *below_4g_mem_size - 0xc0000);
> +                             pcms->below_4g_mem_size - 0xc0000);
>       memory_region_add_subregion(sysmem, 0xc0000, &ram_lo);
> -    if (*above_4g_mem_size > 0) {
> +    if (pcms->above_4g_mem_size > 0) {
>           memory_region_init_alias(&ram_hi, NULL, "xen.ram.hi",
>                                    &ram_memory, 0x100000000ULL,
> -                                 *above_4g_mem_size);
> +                                 pcms->above_4g_mem_size);
>           memory_region_add_subregion(sysmem, 0x100000000ULL, &ram_hi);
>       }
>   }
> @@ -1159,7 +1158,7 @@ static void xen_wakeup_notifier(Notifier *notifier, void *data)
>   }
>
>   /* return 0 means OK, or -1 means critical issue -- will exit(1) */
> -int xen_hvm_init(ram_addr_t *below_4g_mem_size, ram_addr_t *above_4g_mem_size,
> +int xen_hvm_init(PCMachineState *pcms,
>                    MemoryRegion **ram_memory)
>   {
>       int i, rc;
> @@ -1270,7 +1269,7 @@ int xen_hvm_init(ram_addr_t *below_4g_mem_size, ram_addr_t *above_4g_mem_size,
>
>       /* Init RAM management */
>       xen_map_cache_init(xen_phys_offset_to_gaddr, state);
> -    xen_ram_init(below_4g_mem_size, above_4g_mem_size, ram_size, ram_memory);
> +    xen_ram_init(pcms, ram_size, ram_memory);
>
>       qemu_add_vm_change_state_handler(xen_hvm_change_state_handler, state);
>
>

Reviewed-by: Marcel Apfelbaum <marcel@redhat.com>

Thanks,
Marcel