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exec: introduce address_space_get_iotlb_entry()

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This patch introduces a helper to query the iotlb entry for a
possible iova. This will be used by later device IOTLB API to enable
the capability for a dataplane (e.g vhost) to query the IOTLB.

Backports commit 052c8fa9983f553fdfa0d61034774070dd639c2b from qemu
This commit is contained in:
Jason Wang 2018-03-01 13:03:39 -05:00 committed by Lioncash
parent efad2631d2
commit fdca6292a1
No known key found for this signature in database
GPG key ID: 4E3C3CC1031BA9C7
16 changed files with 67 additions and 13 deletions
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3
qemu/aarch64.h
View file

@ -59,6 +59,7 @@
#define address_space_init address_space_init_aarch64
#define address_space_init_dispatch address_space_init_dispatch_aarch64
#define address_space_init_shareable address_space_init_shareable_aarch64
#define address_space_get_iotlb_entry address_space_get_iotlb_entry_aarch64
#define address_space_ldl address_space_ldl_aarch64
#define address_space_ldl_be address_space_ldl_be_aarch64
#define address_space_ldl_be_cached address_space_ldl_be_cached_aarch64
@ -2858,8 +2859,8 @@
#define strpadcpy strpadcpy_aarch64
#define strstart strstart_aarch64
#define stw_be_p stw_be_p_aarch64
#define stw_be_phys_cached stw_be_phys_cached_aarch64
#define stw_be_phys stw_be_phys_aarch64
#define stw_be_phys_cached stw_be_phys_cached_aarch64
#define stw_he_p stw_he_p_aarch64
#define stw_le_p stw_le_p_aarch64
#define stw_le_phys stw_le_phys_aarch64

3
qemu/aarch64eb.h
View file

@ -59,6 +59,7 @@
#define address_space_init address_space_init_aarch64eb
#define address_space_init_dispatch address_space_init_dispatch_aarch64eb
#define address_space_init_shareable address_space_init_shareable_aarch64eb
#define address_space_get_iotlb_entry address_space_get_iotlb_entry_aarch64eb
#define address_space_ldl address_space_ldl_aarch64eb
#define address_space_ldl_be address_space_ldl_be_aarch64eb
#define address_space_ldl_be_cached address_space_ldl_be_cached_aarch64eb
@ -2858,8 +2859,8 @@
#define strpadcpy strpadcpy_aarch64eb
#define strstart strstart_aarch64eb
#define stw_be_p stw_be_p_aarch64eb
#define stw_be_phys_cached stw_be_phys_cached_aarch64eb
#define stw_be_phys stw_be_phys_aarch64eb
#define stw_be_phys_cached stw_be_phys_cached_aarch64eb
#define stw_he_p stw_he_p_aarch64eb
#define stw_le_p stw_le_p_aarch64eb
#define stw_le_phys stw_le_phys_aarch64eb

3
qemu/arm.h
View file

@ -59,6 +59,7 @@
#define address_space_init address_space_init_arm
#define address_space_init_dispatch address_space_init_dispatch_arm
#define address_space_init_shareable address_space_init_shareable_arm
#define address_space_get_iotlb_entry address_space_get_iotlb_entry_arm
#define address_space_ldl address_space_ldl_arm
#define address_space_ldl_be address_space_ldl_be_arm
#define address_space_ldl_be_cached address_space_ldl_be_cached_arm
@ -2858,8 +2859,8 @@
#define strpadcpy strpadcpy_arm
#define strstart strstart_arm
#define stw_be_p stw_be_p_arm
#define stw_be_phys_cached stw_be_phys_cached_arm
#define stw_be_phys stw_be_phys_arm
#define stw_be_phys_cached stw_be_phys_cached_arm
#define stw_he_p stw_he_p_arm
#define stw_le_p stw_le_p_arm
#define stw_le_phys stw_le_phys_arm

3
qemu/armeb.h
View file

@ -59,6 +59,7 @@
#define address_space_init address_space_init_armeb
#define address_space_init_dispatch address_space_init_dispatch_armeb
#define address_space_init_shareable address_space_init_shareable_armeb
#define address_space_get_iotlb_entry address_space_get_iotlb_entry_armeb
#define address_space_ldl address_space_ldl_armeb
#define address_space_ldl_be address_space_ldl_be_armeb
#define address_space_ldl_be_cached address_space_ldl_be_cached_armeb
@ -2858,8 +2859,8 @@
#define strpadcpy strpadcpy_armeb
#define strstart strstart_armeb
#define stw_be_p stw_be_p_armeb
#define stw_be_phys_cached stw_be_phys_cached_armeb
#define stw_be_phys stw_be_phys_armeb
#define stw_be_phys_cached stw_be_phys_cached_armeb
#define stw_he_p stw_he_p_armeb
#define stw_le_p stw_le_p_armeb
#define stw_le_phys stw_le_phys_armeb

35
qemu/exec.c
View file

@ -393,6 +393,41 @@ address_space_translate_internal(AddressSpaceDispatch *d, hwaddr addr, hwaddr *x
return section;
}
/* Called from RCU critical section */
IOMMUTLBEntry address_space_get_iotlb_entry(AddressSpace *as, hwaddr addr,
bool is_write)
{
IOMMUTLBEntry iotlb = {0};
MemoryRegionSection *section;
MemoryRegion *mr;
for (;;) {
// Unicorn: atomic_read used instead of atomic_rcu_read
AddressSpaceDispatch *d = atomic_read(&as->dispatch);
section = address_space_lookup_region(d, addr, false);
addr = addr - section->offset_within_address_space
+ section->offset_within_region;
mr = section->mr;
if (!mr->iommu_ops) {
break;
}
iotlb = mr->iommu_ops->translate(mr, addr, is_write);
if (!(iotlb.perm & (1 << is_write))) {
iotlb.target_as = NULL;
break;
}
addr = ((iotlb.translated_addr & ~iotlb.addr_mask)
| (addr & iotlb.addr_mask));
as = iotlb.target_as;
}
return iotlb;
}
/* Called from RCU critical section */
MemoryRegion *address_space_translate(AddressSpace *as, hwaddr addr,
hwaddr *xlat, hwaddr *plen,
bool is_write)

1
qemu/header_gen.py
View file

@ -65,6 +65,7 @@ symbols = (
'address_space_init',
'address_space_init_dispatch',
'address_space_init_shareable',
'address_space_get_iotlb_entry',
'address_space_ldl',
'address_space_ldl_be',
'address_space_ldl_be_cached',

5
qemu/include/exec/memory.h
View file

@ -1213,6 +1213,11 @@ void stl_le_phys_cached(MemoryRegionCache *cache, hwaddr addr, uint32_t val);
void stl_be_phys_cached(MemoryRegionCache *cache, hwaddr addr, uint32_t val);
void stq_le_phys_cached(MemoryRegionCache *cache, hwaddr addr, uint64_t val);
void stq_be_phys_cached(MemoryRegionCache *cache, hwaddr addr, uint64_t val);
/* address_space_get_iotlb_entry: translate an address into an IOTLB
* entry. Should be called from an RCU critical section.
*/
IOMMUTLBEntry address_space_get_iotlb_entry(AddressSpace *as, hwaddr addr,
bool is_write);
/* address_space_translate: translate an address range into an address space
* into a MemoryRegion and an address range into that section

3
qemu/m68k.h
View file

@ -59,6 +59,7 @@
#define address_space_init address_space_init_m68k
#define address_space_init_dispatch address_space_init_dispatch_m68k
#define address_space_init_shareable address_space_init_shareable_m68k
#define address_space_get_iotlb_entry address_space_get_iotlb_entry_m68k
#define address_space_ldl address_space_ldl_m68k
#define address_space_ldl_be address_space_ldl_be_m68k
#define address_space_ldl_be_cached address_space_ldl_be_cached_m68k
@ -2858,8 +2859,8 @@
#define strpadcpy strpadcpy_m68k
#define strstart strstart_m68k
#define stw_be_p stw_be_p_m68k
#define stw_be_phys_cached stw_be_phys_cached_m68k
#define stw_be_phys stw_be_phys_m68k
#define stw_be_phys_cached stw_be_phys_cached_m68k
#define stw_he_p stw_he_p_m68k
#define stw_le_p stw_le_p_m68k
#define stw_le_phys stw_le_phys_m68k

3
qemu/mips.h
View file

@ -59,6 +59,7 @@
#define address_space_init address_space_init_mips
#define address_space_init_dispatch address_space_init_dispatch_mips
#define address_space_init_shareable address_space_init_shareable_mips
#define address_space_get_iotlb_entry address_space_get_iotlb_entry_mips
#define address_space_ldl address_space_ldl_mips
#define address_space_ldl_be address_space_ldl_be_mips
#define address_space_ldl_be_cached address_space_ldl_be_cached_mips
@ -2858,8 +2859,8 @@
#define strpadcpy strpadcpy_mips
#define strstart strstart_mips
#define stw_be_p stw_be_p_mips
#define stw_be_phys_cached stw_be_phys_cached_mips
#define stw_be_phys stw_be_phys_mips
#define stw_be_phys_cached stw_be_phys_cached_mips
#define stw_he_p stw_he_p_mips
#define stw_le_p stw_le_p_mips
#define stw_le_phys stw_le_phys_mips

3
qemu/mips64.h
View file

@ -59,6 +59,7 @@
#define address_space_init address_space_init_mips64
#define address_space_init_dispatch address_space_init_dispatch_mips64
#define address_space_init_shareable address_space_init_shareable_mips64
#define address_space_get_iotlb_entry address_space_get_iotlb_entry_mips64
#define address_space_ldl address_space_ldl_mips64
#define address_space_ldl_be address_space_ldl_be_mips64
#define address_space_ldl_be_cached address_space_ldl_be_cached_mips64
@ -2858,8 +2859,8 @@
#define strpadcpy strpadcpy_mips64
#define strstart strstart_mips64
#define stw_be_p stw_be_p_mips64
#define stw_be_phys_cached stw_be_phys_cached_mips64
#define stw_be_phys stw_be_phys_mips64
#define stw_be_phys_cached stw_be_phys_cached_mips64
#define stw_he_p stw_he_p_mips64
#define stw_le_p stw_le_p_mips64
#define stw_le_phys stw_le_phys_mips64

3
qemu/mips64el.h
View file

@ -59,6 +59,7 @@
#define address_space_init address_space_init_mips64el
#define address_space_init_dispatch address_space_init_dispatch_mips64el
#define address_space_init_shareable address_space_init_shareable_mips64el
#define address_space_get_iotlb_entry address_space_get_iotlb_entry_mips64el
#define address_space_ldl address_space_ldl_mips64el
#define address_space_ldl_be address_space_ldl_be_mips64el
#define address_space_ldl_be_cached address_space_ldl_be_cached_mips64el
@ -2858,8 +2859,8 @@
#define strpadcpy strpadcpy_mips64el
#define strstart strstart_mips64el
#define stw_be_p stw_be_p_mips64el
#define stw_be_phys_cached stw_be_phys_cached_mips64el
#define stw_be_phys stw_be_phys_mips64el
#define stw_be_phys_cached stw_be_phys_cached_mips64el
#define stw_he_p stw_he_p_mips64el
#define stw_le_p stw_le_p_mips64el
#define stw_le_phys stw_le_phys_mips64el

3
qemu/mipsel.h
View file

@ -59,6 +59,7 @@
#define address_space_init address_space_init_mipsel
#define address_space_init_dispatch address_space_init_dispatch_mipsel
#define address_space_init_shareable address_space_init_shareable_mipsel
#define address_space_get_iotlb_entry address_space_get_iotlb_entry_mipsel
#define address_space_ldl address_space_ldl_mipsel
#define address_space_ldl_be address_space_ldl_be_mipsel
#define address_space_ldl_be_cached address_space_ldl_be_cached_mipsel
@ -2858,8 +2859,8 @@
#define strpadcpy strpadcpy_mipsel
#define strstart strstart_mipsel
#define stw_be_p stw_be_p_mipsel
#define stw_be_phys_cached stw_be_phys_cached_mipsel
#define stw_be_phys stw_be_phys_mipsel
#define stw_be_phys_cached stw_be_phys_cached_mipsel
#define stw_he_p stw_he_p_mipsel
#define stw_le_p stw_le_p_mipsel
#define stw_le_phys stw_le_phys_mipsel

3
qemu/powerpc.h
View file

@ -59,6 +59,7 @@
#define address_space_init address_space_init_powerpc
#define address_space_init_dispatch address_space_init_dispatch_powerpc
#define address_space_init_shareable address_space_init_shareable_powerpc
#define address_space_get_iotlb_entry address_space_get_iotlb_entry_powerpc
#define address_space_ldl address_space_ldl_powerpc
#define address_space_ldl_be address_space_ldl_be_powerpc
#define address_space_ldl_be_cached address_space_ldl_be_cached_powerpc
@ -2858,8 +2859,8 @@
#define strpadcpy strpadcpy_powerpc
#define strstart strstart_powerpc
#define stw_be_p stw_be_p_powerpc
#define stw_be_phys_cached stw_be_phys_cached_powerpc
#define stw_be_phys stw_be_phys_powerpc
#define stw_be_phys_cached stw_be_phys_cached_powerpc
#define stw_he_p stw_he_p_powerpc
#define stw_le_p stw_le_p_powerpc
#define stw_le_phys stw_le_phys_powerpc

3
qemu/sparc.h
View file

@ -59,6 +59,7 @@
#define address_space_init address_space_init_sparc
#define address_space_init_dispatch address_space_init_dispatch_sparc
#define address_space_init_shareable address_space_init_shareable_sparc
#define address_space_get_iotlb_entry address_space_get_iotlb_entry_sparc
#define address_space_ldl address_space_ldl_sparc
#define address_space_ldl_be address_space_ldl_be_sparc
#define address_space_ldl_be_cached address_space_ldl_be_cached_sparc
@ -2858,8 +2859,8 @@
#define strpadcpy strpadcpy_sparc
#define strstart strstart_sparc
#define stw_be_p stw_be_p_sparc
#define stw_be_phys_cached stw_be_phys_cached_sparc
#define stw_be_phys stw_be_phys_sparc
#define stw_be_phys_cached stw_be_phys_cached_sparc
#define stw_he_p stw_he_p_sparc
#define stw_le_p stw_le_p_sparc
#define stw_le_phys stw_le_phys_sparc

3
qemu/sparc64.h
View file

@ -59,6 +59,7 @@
#define address_space_init address_space_init_sparc64
#define address_space_init_dispatch address_space_init_dispatch_sparc64
#define address_space_init_shareable address_space_init_shareable_sparc64
#define address_space_get_iotlb_entry address_space_get_iotlb_entry_sparc64
#define address_space_ldl address_space_ldl_sparc64
#define address_space_ldl_be address_space_ldl_be_sparc64
#define address_space_ldl_be_cached address_space_ldl_be_cached_sparc64
@ -2858,8 +2859,8 @@
#define strpadcpy strpadcpy_sparc64
#define strstart strstart_sparc64
#define stw_be_p stw_be_p_sparc64
#define stw_be_phys_cached stw_be_phys_cached_sparc64
#define stw_be_phys stw_be_phys_sparc64
#define stw_be_phys_cached stw_be_phys_cached_sparc64
#define stw_he_p stw_he_p_sparc64
#define stw_le_p stw_le_p_sparc64
#define stw_le_phys stw_le_phys_sparc64

3
qemu/x86_64.h
View file

@ -59,6 +59,7 @@
#define address_space_init address_space_init_x86_64
#define address_space_init_dispatch address_space_init_dispatch_x86_64
#define address_space_init_shareable address_space_init_shareable_x86_64
#define address_space_get_iotlb_entry address_space_get_iotlb_entry_x86_64
#define address_space_ldl address_space_ldl_x86_64
#define address_space_ldl_be address_space_ldl_be_x86_64
#define address_space_ldl_be_cached address_space_ldl_be_cached_x86_64
@ -2858,8 +2859,8 @@
#define strpadcpy strpadcpy_x86_64
#define strstart strstart_x86_64
#define stw_be_p stw_be_p_x86_64
#define stw_be_phys_cached stw_be_phys_cached_x86_64
#define stw_be_phys stw_be_phys_x86_64
#define stw_be_phys_cached stw_be_phys_cached_x86_64
#define stw_he_p stw_he_p_x86_64
#define stw_le_p stw_le_p_x86_64
#define stw_le_phys stw_le_phys_x86_64