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vfio-pci updates include: 

- Destroy MemoryRegions on device teardown
  - Print warnings around PCI option ROM failures
  - Skip bogus mappings from 64bit BAR sizing
  - Act on DMA mapping failures
  - Fix alignment to avoid MSI-X table mapping
  - Fix debug macro typo
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Merge remote-tracking branch 'remotes/awilliam/tags/vfio-pci-for-qemu-20140128.0' into staging

vfio-pci updates include:
 - Destroy MemoryRegions on device teardown
 - Print warnings around PCI option ROM failures
 - Skip bogus mappings from 64bit BAR sizing
 - Act on DMA mapping failures
 - Fix alignment to avoid MSI-X table mapping
 - Fix debug macro typo

# gpg: Signature made Tue 28 Jan 2014 15:27:47 GMT using RSA key ID 3BB08B22
# gpg: Can't check signature: public key not found

* remotes/awilliam/tags/vfio-pci-for-qemu-20140128.0:
  vfio: correct debug macro typo
  vfio: fix mapping of MSIX bar
  kvm: initialize qemu_host_page_size
  vfio-pci: Fail initfn on DMA mapping errors
  vfio: Filter out bogus mappings
  vfio: Do not reattempt a failed rom read
  vfio: warn if host device rom can't be read
  vfio: Destroy memory regions

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2014-02-01 21:07:59 +00:00
parent bd88091cfb 8b6d14087d
commit 850bbe1b94
4 changed files with 77 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

78
hw/misc/vfio.c
View File

@ -135,12 +135,18 @@ enum {
struct VFIOGroup;
typedef struct VFIOType1 {
MemoryListener listener;
int error;
bool initialized;
} VFIOType1;
typedef struct VFIOContainer {
int fd; /* /dev/vfio/vfio, empowered by the attached groups */
struct {
/* enable abstraction to support various iommu backends */
union {
MemoryListener listener; /* Used by type1 iommu */
VFIOType1 type1;
};
void (*release)(struct VFIOContainer *);
} iommu_data;
@ -191,6 +197,7 @@ typedef struct VFIODevice {
bool has_flr;
bool has_pm_reset;
bool needs_reset;
bool rom_read_failed;
} VFIODevice;
typedef struct VFIOGroup {
@ -592,7 +599,7 @@ static void vfio_msi_interrupt(void *opaque)
return;
}
#ifdef VFIO_DEBUG
#ifdef DEBUG_VFIO
MSIMessage msg;
if (vdev->interrupt == VFIO_INT_MSIX) {
@ -1125,6 +1132,14 @@ static void vfio_pci_load_rom(VFIODevice *vdev)
vdev->rom_offset = reg_info.offset;
if (!vdev->rom_size) {
vdev->rom_read_failed = true;
error_report("vfio-pci: Cannot read device rom at "
"%04x:%02x:%02x.%x\n",
vdev->host.domain, vdev->host.bus, vdev->host.slot,
vdev->host.function);
error_printf("Device option ROM contents are probably invalid "
"(check dmesg).\nSkip option ROM probe with rombar=0, "
"or load from file with romfile=\n");
return;
}
@ -1156,6 +1171,9 @@ static uint64_t vfio_rom_read(void *opaque, hwaddr addr, unsigned size)
/* Load the ROM lazily when the guest tries to read it */
if (unlikely(!vdev->rom)) {
vfio_pci_load_rom(vdev);
if (unlikely(!vdev->rom && !vdev->rom_read_failed)) {
vfio_pci_load_rom(vdev);
}
}
memcpy(&val, vdev->rom + addr,
@ -1223,6 +1241,7 @@ static void vfio_pci_size_rom(VFIODevice *vdev)
PCI_BASE_ADDRESS_SPACE_MEMORY, &vdev->pdev.rom);
vdev->pdev.has_rom = true;
vdev->rom_read_failed = false;
}
static void vfio_vga_write(void *opaque, hwaddr addr,
@ -1968,6 +1987,7 @@ static void vfio_vga_quirk_teardown(VFIODevice *vdev)
while (!QLIST_EMPTY(&vdev->vga.region[i].quirks)) {
VFIOQuirk *quirk = QLIST_FIRST(&vdev->vga.region[i].quirks);
memory_region_del_subregion(&vdev->vga.region[i].mem, &quirk->mem);
memory_region_destroy(&quirk->mem);
QLIST_REMOVE(quirk, next);
g_free(quirk);
}
@ -1990,6 +2010,7 @@ static void vfio_bar_quirk_teardown(VFIODevice *vdev, int nr)
while (!QLIST_EMPTY(&bar->quirks)) {
VFIOQuirk *quirk = QLIST_FIRST(&bar->quirks);
memory_region_del_subregion(&bar->mem, &quirk->mem);
memory_region_destroy(&quirk->mem);
QLIST_REMOVE(quirk, next);
g_free(quirk);
}
@ -2141,14 +2162,21 @@ static int vfio_dma_map(VFIOContainer *container, hwaddr iova,
static bool vfio_listener_skipped_section(MemoryRegionSection *section)
{
return !memory_region_is_ram(section->mr);
return !memory_region_is_ram(section->mr) ||
/*
* Sizing an enabled 64-bit BAR can cause spurious mappings to
* addresses in the upper part of the 64-bit address space. These
* are never accessed by the CPU and beyond the address width of
* some IOMMU hardware. TODO: VFIO should tell us the IOMMU width.
*/
section->offset_within_address_space & (1ULL << 63);
}
static void vfio_listener_region_add(MemoryListener *listener,
MemoryRegionSection *section)
{
VFIOContainer *container = container_of(listener, VFIOContainer,
iommu_data.listener);
iommu_data.type1.listener);
hwaddr iova, end;
void *vaddr;
int ret;
@ -2190,6 +2218,19 @@ static void vfio_listener_region_add(MemoryListener *listener,
error_report("vfio_dma_map(%p, 0x%"HWADDR_PRIx", "
"0x%"HWADDR_PRIx", %p) = %d (%m)",
container, iova, end - iova, vaddr, ret);
/*
* On the initfn path, store the first error in the container so we
* can gracefully fail. Runtime, there's not much we can do other
* than throw a hardware error.
*/
if (!container->iommu_data.type1.initialized) {
if (!container->iommu_data.type1.error) {
container->iommu_data.type1.error = ret;
}
} else {
hw_error("vfio: DMA mapping failed, unable to continue\n");
}
}
}
@ -2197,7 +2238,7 @@ static void vfio_listener_region_del(MemoryListener *listener,
MemoryRegionSection *section)
{
VFIOContainer *container = container_of(listener, VFIOContainer,
iommu_data.listener);
iommu_data.type1.listener);
hwaddr iova, end;
int ret;
@ -2242,7 +2283,7 @@ static MemoryListener vfio_memory_listener = {
static void vfio_listener_release(VFIOContainer *container)
{
memory_listener_unregister(&container->iommu_data.listener);
memory_listener_unregister(&container->iommu_data.type1.listener);
}
/*
@ -2412,10 +2453,12 @@ static void vfio_unmap_bar(VFIODevice *vdev, int nr)
memory_region_del_subregion(&bar->mem, &bar->mmap_mem);
munmap(bar->mmap, memory_region_size(&bar->mmap_mem));
memory_region_destroy(&bar->mmap_mem);
if (vdev->msix && vdev->msix->table_bar == nr) {
memory_region_del_subregion(&bar->mem, &vdev->msix->mmap_mem);
munmap(vdev->msix->mmap, memory_region_size(&vdev->msix->mmap_mem));
memory_region_destroy(&vdev->msix->mmap_mem);
}
memory_region_destroy(&bar->mem);
@ -2501,7 +2544,7 @@ static void vfio_map_bar(VFIODevice *vdev, int nr)
* potentially insert a direct-mapped subregion before and after it.
*/
if (vdev->msix && vdev->msix->table_bar == nr) {
size = vdev->msix->table_offset & TARGET_PAGE_MASK;
size = vdev->msix->table_offset & qemu_host_page_mask;
}
strncat(name, " mmap", sizeof(name) - strlen(name) - 1);
@ -2513,8 +2556,8 @@ static void vfio_map_bar(VFIODevice *vdev, int nr)
if (vdev->msix && vdev->msix->table_bar == nr) {
unsigned start;
start = TARGET_PAGE_ALIGN(vdev->msix->table_offset +
(vdev->msix->entries * PCI_MSIX_ENTRY_SIZE));
start = HOST_PAGE_ALIGN(vdev->msix->table_offset +
(vdev->msix->entries * PCI_MSIX_ENTRY_SIZE));
size = start < bar->size ? bar->size - start : 0;
strncat(name, " msix-hi", sizeof(name) - strlen(name) - 1);
@ -3212,10 +3255,23 @@ static int vfio_connect_container(VFIOGroup *group)
return -errno;
}
container->iommu_data.listener = vfio_memory_listener;
container->iommu_data.type1.listener = vfio_memory_listener;
container->iommu_data.release = vfio_listener_release;
memory_listener_register(&container->iommu_data.listener, &address_space_memory);
memory_listener_register(&container->iommu_data.type1.listener,
&address_space_memory);
if (container->iommu_data.type1.error) {
ret = container->iommu_data.type1.error;
vfio_listener_release(container);
g_free(container);
close(fd);
error_report("vfio: memory listener initialization failed for container\n");
return ret;
}
container->iommu_data.type1.initialized = true;
} else {
error_report("vfio: No available IOMMU models");
g_free(container);

1
include/exec/exec-all.h
View File

@ -81,6 +81,7 @@ void cpu_gen_init(void);
int cpu_gen_code(CPUArchState *env, struct TranslationBlock *tb,
int *gen_code_size_ptr);
bool cpu_restore_state(CPUArchState *env, uintptr_t searched_pc);
void page_size_init(void);
void QEMU_NORETURN cpu_resume_from_signal(CPUArchState *env1, void *puc);
void QEMU_NORETURN cpu_io_recompile(CPUArchState *env, uintptr_t retaddr);

1
kvm-all.c
View File

@ -1360,6 +1360,7 @@ int kvm_init(void)
* page size for the system though.
*/
assert(TARGET_PAGE_SIZE <= getpagesize());
page_size_init();
#ifdef KVM_CAP_SET_GUEST_DEBUG
QTAILQ_INIT(&s->kvm_sw_breakpoints);

14
translate-all.c
View File

@ -289,17 +289,15 @@ static inline void map_exec(void *addr, long size)
}
#endif
static void page_init(void)
void page_size_init(void)
{
/* NOTE: we can always suppose that qemu_host_page_size >=
TARGET_PAGE_SIZE */
#ifdef _WIN32
{
SYSTEM_INFO system_info;
SYSTEM_INFO system_info;
GetSystemInfo(&system_info);
qemu_real_host_page_size = system_info.dwPageSize;
}
GetSystemInfo(&system_info);
qemu_real_host_page_size = system_info.dwPageSize;
#else
qemu_real_host_page_size = getpagesize();
#endif
@ -310,7 +308,11 @@ static void page_init(void)
qemu_host_page_size = TARGET_PAGE_SIZE;
}
qemu_host_page_mask = ~(qemu_host_page_size - 1);
}
static void page_init(void)
{
page_size_init();
#if defined(CONFIG_BSD) && defined(CONFIG_USER_ONLY)
{
#ifdef HAVE_KINFO_GETVMMAP