Opened 5 years ago
Last modified 5 years ago
#19312 closed defect
Linux: kernel 5.6 - we need changes — at Version 5
| Reported by: | Frank Batschulat (Oracle) | Owned by: | Frank Batschulat (Oracle) |
|---|---|---|---|
| Component: | other | Version: | VirtualBox 6.1.2 |
| Keywords: | linux 5.6 kernel | Cc: | |
| Guest type: | Linux | Host type: | Linux |
Description (last modified by )
So mainline 5.6-rc1 is out and we have already 1 change required:
In file included from /home/ws/vbtrunk/trunk/out/linux.amd64/debug/obj/tstvboxguest-src_mod/combined-os-specific.c:33:0:
/home/ws/vbtrunk/trunk/out/linux.amd64/debug/obj/tstvboxguest-src_mod/r0drv/linux/memobj-r0drv-linux.c: In function ‘rtR0MemObjNativeMapKernel’:
/home/ws/vbtrunk/trunk/out/linux.amd64/debug/obj/tstvboxguest-src_mod/r0drv/linux/memobj-r0drv-linux.c:1465:32: error: implicit declaration of function ‘ioremap_nocache’; did you mean ‘ioremap_cache’? [-Werror=implicit-function-declaration]
? ioremap_nocache(pMemLnxToMap->Core.u.Phys.PhysBase + offSub, cbSub)
^~~~~~~~~~~~~~~
ioremap_cache
/home/ws/vbtrunk/trunk/out/linux.amd64/debug/obj/tstvboxguest-src_mod/r0drv/linux/memobj-r0drv-linux.c:1466:30: error: pointer/integer type mismatch in conditional expression [-Werror]
: ioremap(pMemLnxToMap->Core.u.Phys.PhysBase + offSub, cbSub);
^
This is due to:
https://github.com/torvalds/linux/commit/4bdc0d676a643140bdf17dbf7eafedee3d496a3c
https://github.com/torvalds/linux/tree/master/drivers/usb/early
ioremap has provided non-cached semantics by default since the Linux 2.6 days, so remove the additional ioremap_nocache interface.
Merging generic-ioremap/for-next (4bdc0d676a64 remove ioremap_nocache and devm_ioremap_nocache)
https://www.spinics.net/lists/netdev/msg623588.html
https://lkml.org/lkml/2020/2/4/275
obvious fix:
=> replace use of ioremap_nocache() with ioremap_cache()
Change History (6)
comment:1 by , 5 years ago
| Guest type: | other → Linux |
|---|---|
| Host type: | other → Linux |
| Owner: | set to |
| Status: | new → assigned |
comment:3 by , 5 years ago
With 5.6-rc3 we get additional compilation errors:
In file included from /home/ws/56vb/trunk/out/linux.amd64/debug/obj/tstvboxguest-src_mod/r0drv/linux/waitqueue-r0drv-linux.h:38:0,
from /home/ws/56vb/trunk/out/linux.amd64/debug/obj/tstvboxguest-src_mod/r0drv/linux/semevent-r0drv-linux.c:42,
from /home/ws/56vb/trunk/out/linux.amd64/debug/obj/tstvboxguest-src_mod/combined-os-specific.c:38:
/home/ws/56vb/trunk/out/linux.amd64/debug/obj/tstvboxguest-src_mod/include/iprt/time.h: In function ‘RTTimeSpecGetTimeval’:
/home/ws/56vb/trunk/out/linux.amd64/debug/obj/tstvboxguest-src_mod/include/iprt/time.h:379:13: error: dereferencing pointer to incomplete type ‘struct timeval’
pTimeval->tv_sec = (time_t)i64;
^~
/home/ws/56vb/trunk/out/linux.amd64/debug/obj/tstvboxguest-src_mod/include/iprt/time.h:379:25: error: ‘time_t’ undeclared (first use in this function); did you mean ‘ktime_t’?
pTimeval->tv_sec = (time_t)i64;
^~~~~~
ktime_t
/home/ws/56vb/trunk/out/linux.amd64/debug/obj/tstvboxguest-src_mod/include/iprt/time.h:379:25: note: each undeclared identifier is reported only once for each function it appears in
/home/ws/56vb/trunk/out/linux.amd64/debug/obj/tstvboxguest-src_mod/include/iprt/time.h:379:32: error: expected ‘;’ before ‘i64’
pTimeval->tv_sec = (time_t)i64;
^~~
/home/ws/56vb/trunk/out/linux.amd64/debug/obj/tstvboxguest-src_mod/include/iprt/time.h: In function ‘RTTimeSpecSetTimeval’:
/home/ws/56vb/trunk/out/linux.amd64/debug/obj/tstvboxguest-src_mod/include/iprt/time.h:393:67: error: dereferencing pointer to incomplete type ‘const struct timeval’
return RTTimeSpecAddMicro(RTTimeSpecSetSeconds(pTime, pTimeval->tv_sec), pTimeval->tv_usec);
^~
In file included from /home/ws/56vb/trunk/out/linux.amd64/debug/obj/tstvboxguest-src_mod/combined-os-specific.c:46:0:
/home/ws/56vb/trunk/out/linux.amd64/debug/obj/tstvboxguest-src_mod/r0drv/linux/time-r0drv-linux.c: In function ‘rtTimeGetSystemNanoTS’:
/home/ws/56vb/trunk/out/linux.amd64/debug/obj/tstvboxguest-src_mod/r0drv/linux/time-r0drv-linux.c:46:21: error: storage size of ‘Ts’ isn’t known
struct timespec Ts;
^~
/home/ws/56vb/trunk/out/linux.amd64/debug/obj/tstvboxguest-src_mod/r0drv/linux/time-r0drv-linux.c:47:5: error: implicit declaration of function ‘ktime_get_ts’; did you mean ‘ktime_get_ns’? [-Werror=implicit-function-declaration]
ktime_get_ts(&Ts);
^~~~~~~~~~~~
ktime_get_ns
/home/ws/56vb/trunk/out/linux.amd64/debug/obj/tstvboxguest-src_mod/r0drv/linux/time-r0drv-linux.c:46:21: error: unused variable ‘Ts’ [-Werror=unused-variable]
struct timespec Ts;
^~
kBuild: Generating /home/ws/56vb/trunk/out/linux.amd64/debug/obj/webservice/vboxweb.wsdl
/home/ws/56vb/trunk/out/linux.amd64/debug/obj/tstvboxguest-src_mod/r0drv/linux/time-r0drv-linux.c: In function ‘VBoxGuest_RTTimeNow’:
/home/ws/56vb/trunk/out/linux.amd64/debug/obj/tstvboxguest-src_mod/r0drv/linux/time-r0drv-linux.c:184:12: error: implicit declaration of function ‘RTTimeSpecSetTimespec64’; did you mean ‘RTTimeSpecSetTimeval’? [-Werror=implicit-function-declaration]
return RTTimeSpecSetTimespec64(pTime, &Ts);
^~~~~~~~~~~~~~~~~~~~~~~
RTTimeSpecSetTimeval
/home/ws/56vb/trunk/out/linux.amd64/debug/obj/tstvboxguest-src_mod/r0drv/linux/time-r0drv-linux.c:184:12: error: return makes pointer from integer without a cast [-Werror=int-conversion]
return RTTimeSpecSetTimespec64(pTime, &Ts);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
comment:4 by , 5 years ago
We have been finally hit by the Linux-32-bit-Past-Y2038 work/changes that has been going on since at least kernel version 5.5 but is getting close to an end in 5.6.
https://www.phoronix.com/scan.php?page=news_item&px=Linux-5.6-32-bit-Past-Y2038
the individual errors from above:
1) struct timeval:
https://lkml.org/lkml/2020/1/29/355?anz=web
https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git/log/?h=y2038-endgame
in Linux 5.6-rc3:
https://lwn.net/Articles/813158/
y2038: hide timeval/timespec/itimerval/itimerspec types
https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git/commit/?h=y2038-endgame&id=82c3bb87758c4128530f3cbb7ae045ef423ee718
2) ktime_get_ts():
This is used in the Linux runtime:
trunk/src/VBox/Runtime/r0drv/linux/time-r0drv-linux.c:rtTimeGetSystemNanoTS()
https://www.kernel.org/doc/html/latest/core-api/timekeeping.html
https://www.kernel.org/doc/html/latest/core-api/timekeeping.html#deprecated-time-interfaces
Deprecated time interfaces
Older kernels used some other interfaces that are now being phased
out but may appear in third-party drivers being ported here. In
particular, all interfaces returning a ‘struct timeval’ or ‘struct
timespec’ have been replaced because the tv_sec member overflows in
year 2038 on 32-bit architectures. These are the recommended
replacements:
void ktime_get_ts(struct timespec *)
Use ktime_get() or ktime_get_ts64() instead.
present till 5.6-rc2:
https://elixir.bootlin.com/linux/v5.6-rc2/source/include/linux/timekeeping32.h
and it's gone with 5.6-rc3:
https://github.com/torvalds/linux/commit/412c53a680a97cb1ae2c0ab60230e193bee86387#diff-29d5ddd06ea73839af565f438a7c186c
https://elixir.bootlin.com/linux/v5.6-rc3/source/include/linux/timekeeping32.h
https://github.com/torvalds/linux/blob/master/include/linux/timekeeping32.h
it already said in the past: include/linux/timekeeping32.h:
#ifndef _LINUX_TIMEKEEPING32_H #define _LINUX_TIMEKEEPING32_H /* * These interfaces are all based on the old timespec type * and should get replaced with the timespec64 based versions * over time so we can remove the file here. */
=> use ktime_get_ts64()
https://elixir.bootlin.com/linux/v5.6-rc3/source/include/linux/timekeeping.h#L42
3) struct timespec:
4) overall 64-bit kernel time interface merge:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=22b17db4ea05
comment:5 by , 5 years ago
| Description: | modified (diff) |
|---|
Edit: the diffs for that particular issue are:
$ svn diff Index: src/VBox/HostDrivers/VBoxPci/linux/VBoxPci-linux.c =================================================================== --- src/VBox/HostDrivers/VBoxPci/linux/VBoxPci-linux.c (revision 136356) +++ src/VBox/HostDrivers/VBoxPci/linux/VBoxPci-linux.c (working copy) @@ -842,8 +842,11 @@ rcLnx = pci_request_region(pPciDev, iRegion, "vboxpci"); if (!rcLnx) { - /* For now no caching, try to optimize later. */ - RTR0PTR R0PtrMapping = ioremap_nocache(pci_resource_start(pPciDev, iRegion), + /* + * ioremap() defaults to no caching since 2.6 kernels. + * We try to optimize later. + */ + RTR0PTR R0PtrMapping = ioremap(pci_resource_start(pPciDev, iRegion), pci_resource_len(pPciDev, iRegion)); if (R0PtrMapping != NIL_RTR0PTR) @@ -850,7 +853,7 @@ pIns->aRegionR0Mapping[iRegion] = R0PtrMapping; else { - vbpci_printk(KERN_DEBUG, pPciDev, "ioremap_nocache() failed\n"); + vbpci_printk(KERN_DEBUG, pPciDev, "ioremap_cache() failed\n"); pci_release_region(pPciDev, iRegion); rc = VERR_MAP_FAILED; } Index: src/VBox/Runtime/r0drv/linux/memobj-r0drv-linux.c =================================================================== --- src/VBox/Runtime/r0drv/linux/memobj-r0drv-linux.c (revision 136356) +++ src/VBox/Runtime/r0drv/linux/memobj-r0drv-linux.c (working copy) @@ -1461,9 +1461,19 @@ * MMIO / physical memory. */ Assert(pMemLnxToMap->Core.enmType == RTR0MEMOBJTYPE_PHYS && !pMemLnxToMap->Core.u.Phys.fAllocated); +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 25) + /* + * ioremap() defaults to no caching since the 2.6 kernels. + * ioremap_nocache() has been removed finally in 5.6-rc1. + */ pMemLnx->Core.pv = pMemLnxToMap->Core.u.Phys.uCachePolicy == RTMEM_CACHE_POLICY_MMIO + ? ioremap(pMemLnxToMap->Core.u.Phys.PhysBase + offSub, cbSub) + : ioremap_cache(pMemLnxToMap->Core.u.Phys.PhysBase + offSub, cbSub); +#else /* KERNEL_VERSION < 2.6.25 */ + pMemLnx->Core.pv = pMemLnxToMap->Core.u.Phys.uCachePolicy == RTMEM_CACHE_POLICY_MMIO ? ioremap_nocache(pMemLnxToMap->Core.u.Phys.PhysBase + offSub, cbSub) : ioremap(pMemLnxToMap->Core.u.Phys.PhysBase + offSub, cbSub); +#endif /* KERNEL_VERSION < 2.6.25 */ if (pMemLnx->Core.pv) { /** @todo fix protection. */