core: replace getpagesize() with qemu_real_host_page_size

There are three page size in qemu:

  real host page size
  host page size
  target page size

All of them have dedicate variable to represent. For the last two, we
use the same form in the whole qemu project, while for the first one we
use two forms: qemu_real_host_page_size and getpagesize().

qemu_real_host_page_size is defined to be a replacement of
getpagesize(), so let it serve the role.

[Note] Not fully tested for some arch or device.

Signed-off-by: Wei Yang <richardw.yang@linux.intel.com>
Message-Id: <20191013021145.16011-3-richardw.yang@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

5 files changed, 8 insertions, 7 deletions

diff --git a/hw/intc/s390_flic_kvm.c b/hw/intc/s390_flic_kvm.c
index cedccba..c9ee80e 100644
--- a/hw/intc/s390_flic_kvm.c
+++ b/hw/intc/s390_flic_kvm.c
@@ -25,7 +25,7 @@
 #include "migration/qemu-file-types.h"
 #include "trace.h"
 
-#define FLIC_SAVE_INITIAL_SIZE getpagesize()
+#define FLIC_SAVE_INITIAL_SIZE qemu_real_host_page_size
 #define FLIC_FAILED (-1UL)
 #define FLIC_SAVEVM_VERSION 1
 
diff --git a/hw/ppc/mac_newworld.c b/hw/ppc/mac_newworld.c
index c5bbcc7..3594517 100644
--- a/hw/ppc/mac_newworld.c
+++ b/hw/ppc/mac_newworld.c
@@ -439,7 +439,7 @@ static void ppc_core99_init(MachineState *machine)
     }
 
     /* The NewWorld NVRAM is not located in the MacIO device */
-    if (kvm_enabled() && getpagesize() > 4096) {
+    if (kvm_enabled() && qemu_real_host_page_size > 4096) {
         /* We can't combine read-write and read-only in a single page, so
            move the NVRAM out of ROM again for KVM */
         nvram_addr = 0xFFE00000;
diff --git a/hw/ppc/spapr_pci.c b/hw/ppc/spapr_pci.c
index cc0e782..f6fbcf9 100644
--- a/hw/ppc/spapr_pci.c
+++ b/hw/ppc/spapr_pci.c
@@ -1942,7 +1942,7 @@ static void spapr_phb_realize(DeviceState *dev, Error **errp)
      * our memory slot is of page size granularity.
      */
     if (kvm_enabled()) {
-        msi_window_size = getpagesize();
+        msi_window_size = qemu_real_host_page_size;
     }
 
     memory_region_init_io(&sphb->msiwindow, OBJECT(sphb), &spapr_msi_ops, spapr,
diff --git a/hw/rdma/vmw/pvrdma_main.c b/hw/rdma/vmw/pvrdma_main.c
index 3e36e13..3722d9e 100644
--- a/hw/rdma/vmw/pvrdma_main.c
+++ b/hw/rdma/vmw/pvrdma_main.c
@@ -601,7 +601,7 @@ static void pvrdma_realize(PCIDevice *pdev, Error **errp)
     rdma_info_report("Initializing device %s %x.%x", pdev->name,
                      PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn));
 
-    if (TARGET_PAGE_SIZE != getpagesize()) {
+    if (TARGET_PAGE_SIZE != qemu_real_host_page_size) {
         error_setg(errp, "Target page size must be the same as host page size");
         return;
     }
diff --git a/hw/vfio/spapr.c b/hw/vfio/spapr.c
index e853eeb..33692fc 100644
--- a/hw/vfio/spapr.c
+++ b/hw/vfio/spapr.c
@@ -196,14 +196,15 @@ int vfio_spapr_create_window(VFIOContainer *container,
      * bits_per_level is a safe guess of how much we can allocate per level:
      * 8 is the current minimum for CONFIG_FORCE_MAX_ZONEORDER and MAX_ORDER
      * is usually bigger than that.
-     * Below we look at getpagesize() as TCEs are allocated from system pages.
+     * Below we look at qemu_real_host_page_size as TCEs are allocated from
+     * system pages.
      */
-    bits_per_level = ctz64(getpagesize()) + 8;
+    bits_per_level = ctz64(qemu_real_host_page_size) + 8;
     create.levels = bits_total / bits_per_level;
     if (bits_total % bits_per_level) {
         ++create.levels;
     }
-    max_levels = (64 - create.page_shift) / ctz64(getpagesize());
+    max_levels = (64 - create.page_shift) / ctz64(qemu_real_host_page_size);
     for ( ; create.levels <= max_levels; ++create.levels) {
         ret = ioctl(container->fd, VFIO_IOMMU_SPAPR_TCE_CREATE, &create);
         if (!ret) {