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tests/libqos/pci-pc: Fix qpci_pc_iomap() to map BARs aligned

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qpci_pc_iomap() maps BARs one after the other, without padding.  This
is wrong.  PCI Local Bus Specification Revision 3.0, 6.2.5.1. Address
Maps: "all address spaces used are a power of two in size and are
naturally aligned".  That's because the size of a BAR is given by the
number of address bits the device decodes, and the BAR needs to be
mapped at a multiple of that size to ensure the address decoding
works.

Fix qpci_pc_iomap() accordingly.  This takes care of a FIXME in
ivshmem-test.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <1458066895-20632-7-git-send-email-armbru@redhat.com>
This commit is contained in:
Markus Armbruster 2016-03-15 19:34:21 +01:00
parent 330b58368c
commit 998261726a
2 changed files with 12 additions and 9 deletions
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13
tests/ivshmem-test.c
View File

@ -110,18 +110,17 @@ static void setup_vm_cmd(IVState *s, const char *cmd, bool msix)
s->pcibus = qpci_init_pc();
s->dev = get_device(s->pcibus);
/* FIXME: other bar order fails, mappings changes */
s->mem_base = qpci_iomap(s->dev, 2, &barsize);
g_assert_nonnull(s->mem_base);
g_assert_cmpuint(barsize, ==, TMPSHMSIZE);
s->reg_base = qpci_iomap(s->dev, 0, &barsize);
g_assert_nonnull(s->reg_base);
g_assert_cmpuint(barsize, ==, 256);
if (msix) {
qpci_msix_enable(s->dev);
}
s->reg_base = qpci_iomap(s->dev, 0, &barsize);
g_assert_nonnull(s->reg_base);
g_assert_cmpuint(barsize, ==, 256);
s->mem_base = qpci_iomap(s->dev, 2, &barsize);
g_assert_nonnull(s->mem_base);
g_assert_cmpuint(barsize, ==, TMPSHMSIZE);
qpci_device_enable(s->dev);
}

8
tests/libqos/pci-pc.c
View File

@ -184,7 +184,9 @@ static void *qpci_pc_iomap(QPCIBus *bus, QPCIDevice *dev, int barno, uint64_t *s
if (io_type == PCI_BASE_ADDRESS_SPACE_IO) {
uint16_t loc;
g_assert((s->pci_iohole_alloc + size) <= s->pci_iohole_size);
g_assert(QEMU_ALIGN_UP(s->pci_iohole_alloc, size) + size
<= s->pci_iohole_size);
s->pci_iohole_alloc = QEMU_ALIGN_UP(s->pci_iohole_alloc, size);
loc = s->pci_iohole_start + s->pci_iohole_alloc;
s->pci_iohole_alloc += size;
@ -194,7 +196,9 @@ static void *qpci_pc_iomap(QPCIBus *bus, QPCIDevice *dev, int barno, uint64_t *s
} else {
uint64_t loc;
g_assert((s->pci_hole_alloc + size) <= s->pci_hole_size);
g_assert(QEMU_ALIGN_UP(s->pci_hole_alloc, size) + size
<= s->pci_hole_size);
s->pci_hole_alloc = QEMU_ALIGN_UP(s->pci_hole_alloc, size);
loc = s->pci_hole_start + s->pci_hole_alloc;
s->pci_hole_alloc += size;