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


From: Marcel Apfelbaum
Subject: Re: [Qemu-devel] [PATCH v2 1/4] pc: Remove redundant arguments from xen_hvm_init()
Date: Tue, 25 Aug 2015 12:13:46 +0300
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.1.0

On 08/17/2015 09:42 PM, Eduardo Habkost wrote:
Remove arguments that can be found in PCMachineState.

Signed-off-by: Eduardo Habkost <address@hidden>
---
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 <address@hidden>

Thanks,
Marcel



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