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Replace qemu_real_host_page variables with inlined functions

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Replace the global variables with inlined helper functions. getpagesize() is very
likely annotated with a "const" function attribute (at least with glibc), and thus
optimization should apply even better.

This avoids the need for a constructor initialization too.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20220323155743.1585078-12-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Marc-André Lureau 2022-03-23 19:57:22 +04:00 • committed by Paolo Bonzini
parent b307e5052d
commit 8e3b0cbb72
53 changed files with 150 additions and 162 deletions
Download patch file Download diff file Expand all files Collapse all files

4
hw/virtio/vhost-iova-tree.c
View file

@ -11,7 +11,7 @@
#include "qemu/iova-tree.h"
#include "vhost-iova-tree.h"
#define iova_min_addr qemu_real_host_page_size
#define iova_min_addr qemu_real_host_page_size()
/**
* VhostIOVATree, able to:
@ -86,7 +86,7 @@ const DMAMap *vhost_iova_tree_find_iova(const VhostIOVATree *tree,
int vhost_iova_tree_map_alloc(VhostIOVATree *tree, DMAMap *map)
{
/* Some vhost devices do not like addr 0. Skip first page */
hwaddr iova_first = tree->iova_first ?: qemu_real_host_page_size;
hwaddr iova_first = tree->iova_first ?: qemu_real_host_page_size();
if (map->translated_addr + map->size < map->translated_addr ||
map->perm == IOMMU_NONE) {

8
hw/virtio/vhost-shadow-virtqueue.c
View file

@ -471,14 +471,14 @@ size_t vhost_svq_driver_area_size(const VhostShadowVirtqueue *svq)
size_t avail_size = offsetof(vring_avail_t, ring) +
sizeof(uint16_t) * svq->vring.num;
return ROUND_UP(desc_size + avail_size, qemu_real_host_page_size);
return ROUND_UP(desc_size + avail_size, qemu_real_host_page_size());
}
size_t vhost_svq_device_area_size(const VhostShadowVirtqueue *svq)
{
size_t used_size = offsetof(vring_used_t, ring) +
sizeof(vring_used_elem_t) * svq->vring.num;
return ROUND_UP(used_size, qemu_real_host_page_size);
return ROUND_UP(used_size, qemu_real_host_page_size());
}
/**
@ -533,11 +533,11 @@ void vhost_svq_start(VhostShadowVirtqueue *svq, VirtIODevice *vdev,
svq->vring.num = virtio_queue_get_num(vdev, virtio_get_queue_index(vq));
driver_size = vhost_svq_driver_area_size(svq);
device_size = vhost_svq_device_area_size(svq);
svq->vring.desc = qemu_memalign(qemu_real_host_page_size, driver_size);
svq->vring.desc = qemu_memalign(qemu_real_host_page_size(), driver_size);
desc_size = sizeof(vring_desc_t) * svq->vring.num;
svq->vring.avail = (void *)((char *)svq->vring.desc + desc_size);
memset(svq->vring.desc, 0, driver_size);
svq->vring.used = qemu_memalign(qemu_real_host_page_size, device_size);
svq->vring.used = qemu_memalign(qemu_real_host_page_size(), device_size);
memset(svq->vring.used, 0, device_size);
svq->ring_id_maps = g_new0(VirtQueueElement *, svq->vring.num);
for (unsigned i = 0; i < svq->vring.num - 1; i++) {

4
hw/virtio/vhost-user.c
View file

@ -1166,7 +1166,7 @@ static int vhost_user_set_vring_num(struct vhost_dev *dev,
static void vhost_user_host_notifier_free(VhostUserHostNotifier *n)
{
assert(n && n->unmap_addr);
munmap(n->unmap_addr, qemu_real_host_page_size);
munmap(n->unmap_addr, qemu_real_host_page_size());
n->unmap_addr = NULL;
}
@ -1503,7 +1503,7 @@ static int vhost_user_slave_handle_vring_host_notifier(struct vhost_dev *dev,
int fd)
{
int queue_idx = area->u64 & VHOST_USER_VRING_IDX_MASK;
size_t page_size = qemu_real_host_page_size;
size_t page_size = qemu_real_host_page_size();
struct vhost_user *u = dev->opaque;
VhostUserState *user = u->user;
VirtIODevice *vdev = dev->vdev;

6
hw/virtio/vhost-vdpa.c
View file

@ -468,7 +468,7 @@ err:
static void vhost_vdpa_host_notifier_uninit(struct vhost_dev *dev,
int queue_index)
{
size_t page_size = qemu_real_host_page_size;
size_t page_size = qemu_real_host_page_size();
struct vhost_vdpa *v = dev->opaque;
VirtIODevice *vdev = dev->vdev;
VhostVDPAHostNotifier *n;
@ -485,7 +485,7 @@ static void vhost_vdpa_host_notifier_uninit(struct vhost_dev *dev,
static int vhost_vdpa_host_notifier_init(struct vhost_dev *dev, int queue_index)
{
size_t page_size = qemu_real_host_page_size;
size_t page_size = qemu_real_host_page_size();
struct vhost_vdpa *v = dev->opaque;
VirtIODevice *vdev = dev->vdev;
VhostVDPAHostNotifier *n;
@ -875,7 +875,7 @@ static bool vhost_vdpa_svq_unmap_ring(struct vhost_vdpa *v,
return false;
}
size = ROUND_UP(result->size, qemu_real_host_page_size);
size = ROUND_UP(result->size, qemu_real_host_page_size());
r = vhost_vdpa_dma_unmap(v, result->iova, size);
return r == 0;
}

10
hw/virtio/virtio-mem.c
View file

@ -53,11 +53,11 @@ static uint32_t virtio_mem_default_thp_size(void)
#if defined(__x86_64__) || defined(__arm__) || defined(__powerpc64__)
default_thp_size = 2 * MiB;
#elif defined(__aarch64__)
if (qemu_real_host_page_size == 4 * KiB) {
if (qemu_real_host_page_size() == 4 * KiB) {
default_thp_size = 2 * MiB;
} else if (qemu_real_host_page_size == 16 * KiB) {
} else if (qemu_real_host_page_size() == 16 * KiB) {
default_thp_size = 32 * MiB;
} else if (qemu_real_host_page_size == 64 * KiB) {
} else if (qemu_real_host_page_size() == 64 * KiB) {
default_thp_size = 512 * MiB;
}
#endif
@ -120,7 +120,7 @@ static uint64_t virtio_mem_default_block_size(RAMBlock *rb)
const uint64_t page_size = qemu_ram_pagesize(rb);
/* We can have hugetlbfs with a page size smaller than the THP size. */
if (page_size == qemu_real_host_page_size) {
if (page_size == qemu_real_host_page_size()) {
return MAX(page_size, virtio_mem_thp_size());
}
return MAX(page_size, VIRTIO_MEM_MIN_BLOCK_SIZE);
@ -135,7 +135,7 @@ static bool virtio_mem_has_shared_zeropage(RAMBlock *rb)
* fresh page, consuming actual memory.
*/
return !qemu_ram_is_shared(rb) && rb->fd < 0 &&
qemu_ram_pagesize(rb) == qemu_real_host_page_size;
qemu_ram_pagesize(rb) == qemu_real_host_page_size();
}
#endif /* VIRTIO_MEM_HAS_LEGACY_GUESTS */