Clang 13.0.0 produces a new -Werror warning about the ACPI_TO_INTEGER(p)
and ACPI_OFFSET(d, f) macros in acpica's actypes.h:
sys/contrib/dev/acpica/components/dispatcher/dsopcode.c:708:31: error: performing pointer subtraction with a null pointer has undefined behavior [-Werror,-Wnull-pointer-subtraction]
ObjDesc->Region.Address = ACPI_PTR_TO_PHYSADDR (Table);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~
sys/contrib/dev/acpica/include/actypes.h:664:41: note: expanded from macro 'ACPI_PTR_TO_PHYSADDR'
#define ACPI_PTR_TO_PHYSADDR(i) ACPI_TO_INTEGER(i)
^~~~~~~~~~~~~~~~~~
sys/contrib/dev/acpica/include/actypes.h:661:41: note: expanded from macro 'ACPI_TO_INTEGER'
#define ACPI_TO_INTEGER(p) ACPI_PTR_DIFF (p, (void *) 0)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
sys/contrib/dev/acpica/include/actypes.h:656:82: note: expanded from macro 'ACPI_PTR_DIFF'
#define ACPI_PTR_DIFF(a, b) ((ACPI_SIZE) (ACPI_CAST_PTR (UINT8, (a)) - ACPI_CAST_PTR (UINT8, (b))))
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~
1 error generated.
This problem of undefined behavior was also reported to acpica by @cem
in 2018: https://github.com/acpica/acpica/issues/407, but it seems there
was never any fix committed for it upstream.
Instead fix these locally, for ACPI_TO_INTEGER by simply casting the
incoming pointer to ACPI_SIZE (which corresponds roughly to uintptr_t
and size_t), and for ACPI_OFFSET by reusing our __offsetof definition
from sys/cdefs.h.
Reviewed by: emaste, kib, imp
MFC after: 3 days
Differential Revision: https://reviews.freebsd.org/D31710
Fix the reported boot failures and revert r350510.
Note this commit is effectively merging ACPICA 20190703 again and applying
an upstream patch.
https://github.com/acpica/acpica/commit/73f6372
Tested by: scottl
Rename ACPI_IVRS_HARDWARE_NEW to ACPI_IVRS_HARDWARE_EFRSUP, since new definitions add Extended Feature Register support. Use IvrsType to distinguish three types of IVHD - 0x10(legacy), 0x11 and 0x40(with EFR). IVHD 0x40 is also called mixed type since it supports HID device entries.
Fix 2 coverity bugs reported by cem.
Reported by:jkim, cem
Approved by:grehan
Differential Revision://reviews.freebsd.org/D14501
IVRS can have entry of type legacy and non-legacy present at same time for same AMD-Vi device. ivhd driver will ignore legacy if new IVHD type is present as specified in AMD-Vi specification. Earlier both of IVHD entries used and two ivhd devices were created.
Add support for new IVHD type 0x11 and 0x40 in ACPI. Create new struct of type acpi_ivrs_hardware_new for these new type of IVHDs. Legacy type 0x10 will continue to use acpi_ivrs_hardware.
Reviewed by: avg
Approved by: grehan
Differential Revision:https://reviews.freebsd.org/D13160
