diff options
| author | Michael S. Tsirkin <mst@redhat.com> | 2016-03-24 15:07:59 +0200 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2016-04-07 19:57:33 +0300 |
| commit | 45aa4e8e39bfc1fe0246e9c33ef30c9309f548c9 (patch) | |
| tree | 85db049773fd8e6a6d7f393ad1e6b9aae54be387 /hw | |
| parent | 8d0ac88e231785feebe14f2cbeaac16631cbf257 (diff) | |
| download | qemu-45aa4e8e39bfc1fe0246e9c33ef30c9309f548c9.zip | |
pci-testdev: fast mmio support
Teach PCI testdev to use fast MMIO when kvm makes it available.
Before:
mmio-wildcard-eventfd:pci-mem 2271
After:
mmio-wildcard-eventfd:pci-mem 1218
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'hw')
| -rw-r--r-- | hw/misc/pci-testdev.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/hw/misc/pci-testdev.c b/hw/misc/pci-testdev.c index 5df9089218..2f2e989778 100644 --- a/hw/misc/pci-testdev.c +++ b/hw/misc/pci-testdev.c @@ -239,6 +239,7 @@ static void pci_testdev_realize(PCIDevice *pci_dev, Error **errp) uint8_t *pci_conf; char *name; int r, i; + bool fastmmio = kvm_ioeventfd_any_length_enabled(); pci_conf = pci_dev->config; @@ -261,8 +262,12 @@ static void pci_testdev_realize(PCIDevice *pci_dev, Error **errp) memcpy(test->hdr->name, name, strlen(name) + 1); g_free(name); test->hdr->offset = cpu_to_le32(IOTEST_SIZE(i) + i * IOTEST_ACCESS_WIDTH); - test->size = IOTEST_ACCESS_WIDTH; test->match_data = strcmp(IOTEST_TEST(i), "wildcard-eventfd"); + if (fastmmio && IOTEST_IS_MEM(i) && !test->match_data) { + test->size = 0; + } else { + test->size = IOTEST_ACCESS_WIDTH; + } test->hdr->test = i; test->hdr->data = test->match_data ? IOTEST_DATAMATCH : IOTEST_NOMATCH; test->hdr->width = IOTEST_ACCESS_WIDTH; |