haraldwolff/qemu-patch-raspberry4
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pci-testdev: fast mmio support

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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>
This commit is contained in:
Michael S. Tsirkin 2016-03-24 15:07:59 +02:00
parent 8d0ac88e23
commit 45aa4e8e39
1 changed files with 6 additions and 1 deletions
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7
hw/misc/pci-testdev.c
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@ -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;