Hi Sean,
FYI, the error/warning was bisected to this commit, please ignore it if it's irrelevant.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: d2d11f342b179f1894a901f143ec7c008caba43e
commit: 70e41c31bc7776b262cd9f524df3dfc2b5869a0a KVM: x86/mmu: Use common logic for computing the 32/64-bit base PA mask
date: 8 months ago
config: x86_64-randconfig-s023-20230206 (https://download.01.org/0day-ci/archive/20230207/[email protected]/config)
compiler: gcc-11 (Debian 11.3.0-8) 11.3.0
reproduce:
# apt-get install sparse
# sparse version: v0.6.4-39-gce1a6720-dirty
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=70e41c31bc7776b262cd9f524df3dfc2b5869a0a
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 70e41c31bc7776b262cd9f524df3dfc2b5869a0a
# save the config file
mkdir build_dir && cp config build_dir/.config
make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=x86_64 olddefconfig
make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=x86_64 SHELL=/bin/bash arch/x86/kvm/
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <[email protected]>
sparse warnings: (new ones prefixed by >>)
arch/x86/kvm/mmu/mmu.c:610:9: sparse: sparse: context imbalance in 'walk_shadow_page_lockless_begin' - different lock contexts for basic block
arch/x86/kvm/mmu/mmu.c: note: in included file (through include/linux/rbtree.h, include/linux/mm_types.h, arch/x86/kvm/irq.h):
include/linux/rcupdate.h:726:9: sparse: sparse: context imbalance in 'walk_shadow_page_lockless_end' - unexpected unlock
arch/x86/kvm/mmu/mmu.c:2550:9: sparse: sparse: context imbalance in 'mmu_try_to_unsync_pages' - different lock contexts for basic block
arch/x86/kvm/mmu/mmu.c: note: in included file:
>> arch/x86/kvm/mmu/paging_tmpl.h:106:24: sparse: sparse: cast truncates bits from constant value (ffffffffff000 becomes fffff000)
arch/x86/kvm/mmu/paging_tmpl.h:426:24: sparse: sparse: cast truncates bits from constant value (ffffffffff000 becomes fffff000)
arch/x86/kvm/mmu/mmu.c:4618:57: sparse: sparse: cast truncates bits from constant value (ffffff33 becomes 33)
arch/x86/kvm/mmu/mmu.c:4620:56: sparse: sparse: cast truncates bits from constant value (ffffff0f becomes f)
arch/x86/kvm/mmu/mmu.c:4622:57: sparse: sparse: cast truncates bits from constant value (ffffff55 becomes 55)
vim +106 arch/x86/kvm/mmu/paging_tmpl.h
b3fcdb04a98035 arch/x86/kvm/mmu/paging_tmpl.h Sean Christopherson 2022-06-14 103
e04da980c35d75 arch/x86/kvm/paging_tmpl.h Joerg Roedel 2009-07-27 104 static gfn_t gpte_to_gfn_lvl(pt_element_t gpte, int lvl)
5fb07ddb183eb4 drivers/kvm/paging_tmpl.h Avi Kivity 2007-11-21 105 {
e04da980c35d75 arch/x86/kvm/paging_tmpl.h Joerg Roedel 2009-07-27 @106 return (gpte & PT_LVL_ADDR_MASK(lvl)) >> PAGE_SHIFT;
5fb07ddb183eb4 drivers/kvm/paging_tmpl.h Avi Kivity 2007-11-21 107 }
5fb07ddb183eb4 drivers/kvm/paging_tmpl.h Avi Kivity 2007-11-21 108
:::::: The code at line 106 was first introduced by commit
:::::: e04da980c35d75fa050ba4009ad99025432d8d7d KVM: MMU: make page walker aware of mapping levels
:::::: TO: Joerg Roedel <[email protected]>
:::::: CC: Avi Kivity <[email protected]>
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests
On Tue, Feb 07, 2023, kernel test robot wrote:
> Hi Sean,
>
> FYI, the error/warning was bisected to this commit, please ignore it if it's irrelevant.
Is there a way to mark this as "working as intended"? The truncation is intentional.
I've been ignoring the reports, but they just keep coming :-)
> tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head: d2d11f342b179f1894a901f143ec7c008caba43e
> commit: 70e41c31bc7776b262cd9f524df3dfc2b5869a0a KVM: x86/mmu: Use common logic for computing the 32/64-bit base PA mask
> date: 8 months ago
> config: x86_64-randconfig-s023-20230206 (https://download.01.org/0day-ci/archive/20230207/[email protected]/config)
> compiler: gcc-11 (Debian 11.3.0-8) 11.3.0
> reproduce:
> # apt-get install sparse
> # sparse version: v0.6.4-39-gce1a6720-dirty
> # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=70e41c31bc7776b262cd9f524df3dfc2b5869a0a
> git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
> git fetch --no-tags linus master
> git checkout 70e41c31bc7776b262cd9f524df3dfc2b5869a0a
> # save the config file
> mkdir build_dir && cp config build_dir/.config
> make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=x86_64 olddefconfig
> make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=x86_64 SHELL=/bin/bash arch/x86/kvm/
>
> If you fix the issue, kindly add following tag where applicable
> | Reported-by: kernel test robot <[email protected]>
>
> sparse warnings: (new ones prefixed by >>)
> arch/x86/kvm/mmu/mmu.c:610:9: sparse: sparse: context imbalance in 'walk_shadow_page_lockless_begin' - different lock contexts for basic block
> arch/x86/kvm/mmu/mmu.c: note: in included file (through include/linux/rbtree.h, include/linux/mm_types.h, arch/x86/kvm/irq.h):
> include/linux/rcupdate.h:726:9: sparse: sparse: context imbalance in 'walk_shadow_page_lockless_end' - unexpected unlock
> arch/x86/kvm/mmu/mmu.c:2550:9: sparse: sparse: context imbalance in 'mmu_try_to_unsync_pages' - different lock contexts for basic block
> arch/x86/kvm/mmu/mmu.c: note: in included file:
> >> arch/x86/kvm/mmu/paging_tmpl.h:106:24: sparse: sparse: cast truncates bits from constant value (ffffffffff000 becomes fffff000)
> arch/x86/kvm/mmu/paging_tmpl.h:426:24: sparse: sparse: cast truncates bits from constant value (ffffffffff000 becomes fffff000)
> arch/x86/kvm/mmu/mmu.c:4618:57: sparse: sparse: cast truncates bits from constant value (ffffff33 becomes 33)
> arch/x86/kvm/mmu/mmu.c:4620:56: sparse: sparse: cast truncates bits from constant value (ffffff0f becomes f)
> arch/x86/kvm/mmu/mmu.c:4622:57: sparse: sparse: cast truncates bits from constant value (ffffff55 becomes 55)
>
> vim +106 arch/x86/kvm/mmu/paging_tmpl.h
>
> b3fcdb04a98035 arch/x86/kvm/mmu/paging_tmpl.h Sean Christopherson 2022-06-14 103
> e04da980c35d75 arch/x86/kvm/paging_tmpl.h Joerg Roedel 2009-07-27 104 static gfn_t gpte_to_gfn_lvl(pt_element_t gpte, int lvl)
> 5fb07ddb183eb4 drivers/kvm/paging_tmpl.h Avi Kivity 2007-11-21 105 {
> e04da980c35d75 arch/x86/kvm/paging_tmpl.h Joerg Roedel 2009-07-27 @106 return (gpte & PT_LVL_ADDR_MASK(lvl)) >> PAGE_SHIFT;
> 5fb07ddb183eb4 drivers/kvm/paging_tmpl.h Avi Kivity 2007-11-21 107 }
> 5fb07ddb183eb4 drivers/kvm/paging_tmpl.h Avi Kivity 2007-11-21 108
>
> :::::: The code at line 106 was first introduced by commit
> :::::: e04da980c35d75fa050ba4009ad99025432d8d7d KVM: MMU: make page walker aware of mapping levels
>
> :::::: TO: Joerg Roedel <[email protected]>
> :::::: CC: Avi Kivity <[email protected]>
>
> --
> 0-DAY CI Kernel Test Service
> https://github.com/intel/lkp-tests
Hi Sean,
On Tue, Feb 07, 2023 at 11:34:11PM +0000, Sean Christopherson wrote:
> On Tue, Feb 07, 2023, kernel test robot wrote:
> > Hi Sean,
> >
> > FYI, the error/warning was bisected to this commit, please ignore it if it's irrelevant.
>
> Is there a way to mark this as "working as intended"? The truncation is intentional.
> I've been ignoring the reports, but they just keep coming :-)
Sorry for reporting this warning repeatedly. We've added it to the
ignore list for this particular commit.
Best Regards,
Yujie
> > tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> > head: d2d11f342b179f1894a901f143ec7c008caba43e
> > commit: 70e41c31bc7776b262cd9f524df3dfc2b5869a0a KVM: x86/mmu: Use common logic for computing the 32/64-bit base PA mask
> > date: 8 months ago
> > config: x86_64-randconfig-s023-20230206 (https://download.01.org/0day-ci/archive/20230207/[email protected]/config)
> > compiler: gcc-11 (Debian 11.3.0-8) 11.3.0
> > reproduce:
> > # apt-get install sparse
> > # sparse version: v0.6.4-39-gce1a6720-dirty
> > # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=70e41c31bc7776b262cd9f524df3dfc2b5869a0a
> > git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
> > git fetch --no-tags linus master
> > git checkout 70e41c31bc7776b262cd9f524df3dfc2b5869a0a
> > # save the config file
> > mkdir build_dir && cp config build_dir/.config
> > make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=x86_64 olddefconfig
> > make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=x86_64 SHELL=/bin/bash arch/x86/kvm/
> >
> > If you fix the issue, kindly add following tag where applicable
> > | Reported-by: kernel test robot <[email protected]>
> >
> > sparse warnings: (new ones prefixed by >>)
> > arch/x86/kvm/mmu/mmu.c:610:9: sparse: sparse: context imbalance in 'walk_shadow_page_lockless_begin' - different lock contexts for basic block
> > arch/x86/kvm/mmu/mmu.c: note: in included file (through include/linux/rbtree.h, include/linux/mm_types.h, arch/x86/kvm/irq.h):
> > include/linux/rcupdate.h:726:9: sparse: sparse: context imbalance in 'walk_shadow_page_lockless_end' - unexpected unlock
> > arch/x86/kvm/mmu/mmu.c:2550:9: sparse: sparse: context imbalance in 'mmu_try_to_unsync_pages' - different lock contexts for basic block
> > arch/x86/kvm/mmu/mmu.c: note: in included file:
> > >> arch/x86/kvm/mmu/paging_tmpl.h:106:24: sparse: sparse: cast truncates bits from constant value (ffffffffff000 becomes fffff000)
> > arch/x86/kvm/mmu/paging_tmpl.h:426:24: sparse: sparse: cast truncates bits from constant value (ffffffffff000 becomes fffff000)
> > arch/x86/kvm/mmu/mmu.c:4618:57: sparse: sparse: cast truncates bits from constant value (ffffff33 becomes 33)
> > arch/x86/kvm/mmu/mmu.c:4620:56: sparse: sparse: cast truncates bits from constant value (ffffff0f becomes f)
> > arch/x86/kvm/mmu/mmu.c:4622:57: sparse: sparse: cast truncates bits from constant value (ffffff55 becomes 55)
> >
> > vim +106 arch/x86/kvm/mmu/paging_tmpl.h
> >
> > b3fcdb04a98035 arch/x86/kvm/mmu/paging_tmpl.h Sean Christopherson 2022-06-14 103
> > e04da980c35d75 arch/x86/kvm/paging_tmpl.h Joerg Roedel 2009-07-27 104 static gfn_t gpte_to_gfn_lvl(pt_element_t gpte, int lvl)
> > 5fb07ddb183eb4 drivers/kvm/paging_tmpl.h Avi Kivity 2007-11-21 105 {
> > e04da980c35d75 arch/x86/kvm/paging_tmpl.h Joerg Roedel 2009-07-27 @106 return (gpte & PT_LVL_ADDR_MASK(lvl)) >> PAGE_SHIFT;
> > 5fb07ddb183eb4 drivers/kvm/paging_tmpl.h Avi Kivity 2007-11-21 107 }
> > 5fb07ddb183eb4 drivers/kvm/paging_tmpl.h Avi Kivity 2007-11-21 108
> >
> > :::::: The code at line 106 was first introduced by commit
> > :::::: e04da980c35d75fa050ba4009ad99025432d8d7d KVM: MMU: make page walker aware of mapping levels
> >
> > :::::: TO: Joerg Roedel <[email protected]>
> > :::::: CC: Avi Kivity <[email protected]>
> >
> > --
> > 0-DAY CI Kernel Test Service
> > https://github.com/intel/lkp-tests
>