Re: [PATCH] powerpc: Restrict ARCH_HIBERNATION_POSSIBLE to supported configurations
Vishal Chourasia writes: > On 17/11/23 4:52 am, Michael Ellerman wrote: >> Vishal Chourasia writes: >>> On 15/11/23 5:46 pm, Aneesh Kumar K V wrote: On 11/15/23 5:23 PM, Vishal Chourasia wrote: > On 15/11/23 1:39 pm, Aneesh Kumar K.V wrote: >> Vishal Chourasia writes: >> >>> This patch modifies the ARCH_HIBERNATION_POSSIBLE option to ensure that >>> it >>> correctly depends on these PowerPC configurations being enabled. As a >>> result, >>> it prevents the HOTPLUG_CPU from being selected when the required >>> dependencies >>> are not satisfied. >>> >>> This change aligns the dependency tree with the expected hardware >>> support for >>> CPU hot-plugging under PowerPC architectures, ensuring that the kernel >>> configuration steps do not lead to inconsistent states. >>> >>> Signed-off-by: Vishal Chourasia >>> --- >>> During the configuration process with 'make randconfig' followed by >>> 'make olddefconfig', we observed a warning indicating an unmet direct >>> dependency for the HOTPLUG_CPU option. The dependency in question >>> relates to >>> various PowerPC configurations (PPC_PSERIES, PPC_PMAC, PPC_POWERNV, >>> FSL_SOC_BOOKE) which were not enabled, yet the HOTPLUG_CPU was >>> beingDuring the configuration process with 'make randconfig' followed by >>> 'make olddefconfig', we observed a warning indicating an unmet direct >>> dependency for the HOTPLUG_CPU option. The dependency in question >>> relates to >>> various PowerPC configurations (PPC_PSERIES, PPC_PMAC, PPC_POWERNV, >>> FSL_SOC_BOOKE) which were not enabled, yet the HOTPLUG_CPU was being >>> erroneously selected due to an implicit assumption by the PM_SLEEP_SMP >>> option. >>> This misalignment in dependencies could potentially lead to >>> inconsistent kernel >>> configuration states, especially when considering the necessary hardware >>> support for CPU hot-plugging on PowerPC platforms. The patch aims to >>> correct >>> this by ensuring that ARCH_HIBERNATION_POSSIBLE is contingent upon the >>> appropriate PowerPC configurations being active. >>> >>> steps to reproduce (before applying the patch): >>> >>> Run 'make pseries_le_defconfig' >>> Run 'make menuconfig' >>> Enable hibernation [ Kernel options -> Hibernation (aka 'suspend to >>> disk') ] >>> Disable [ Platform support -> IBM PowerNV (Non-Virtualized) platform >>> support ] >>> Disable [ Platform support -> IBM pSeries & new (POWER5-based) iSeries ] >>> Enable SMP [ Processor support -> Symmetric multi-processing support ] >>> Save the config >>> Run 'make olddefconfig' >>> erroneously selected due to an implicit assumption by the PM_SLEEP_SMP >>> option. >>> This misalignment in dependencies could potentially lead to >>> inconsistent kernel >>> configuration states, especially when considering the necessary hardware >>> support for CPU hot-plugging on PowerPC platforms. The patch aims to >>> correct >>> this by ensuring that ARCH_HIBERNATION_POSSIBLE is contingent upon the >>> appropriate PowerPC configurations being active. >>> >>> steps to reproduce (before applying the patch): >>> >>> Run 'make pseries_le_defconfig' >>> Run 'make menuconfig' >>> Enable hibernation [ Kernel options -> Hibernation (aka 'suspend to >>> disk') ] >>> Disable [ Platform support -> IBM PowerNV (Non-Virtualized) platform >>> support ] >>> Disable [ Platform support -> IBM pSeries & new (POWER5-based) iSeries ] >>> Enable SMP [ Processor support -> Symmetric multi-processing support ] >>> Save the config >>> Run 'make olddefconfig' >>> >>> arch/powerpc/Kconfig | 5 +++-- >>> 1 file changed, 3 insertions(+), 2 deletions(-) >>> >>> diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig >>> index 6f105ee4f3cf..bf99ff9869f6 100644 >>> --- a/arch/powerpc/Kconfig >>> +++ b/arch/powerpc/Kconfig >>> @@ -380,8 +380,9 @@ config DEFAULT_UIMAGE >>> Used to allow a board to specify it wants a uImage built by >>> default >>> >>> config ARCH_HIBERNATION_POSSIBLE >>> - bool >>> - default y >>> + def_bool y >>> + depends on PPC_PSERIES || \ >>> + PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE >>> >>> config ARCH_SUSPEND_POSSIBLE >>> def_bool y >>> >> I am wondering whether it should be switched to using select from >> config PPC? >> >> selecting ARCH_HIBERNATION_POSSIBLE based on value of config PPC >> will not guarantee config PPC_PSERIES being set >> >> PPC_PSERIES can be set to N, even when config PPC is set. >>> I understand what you meant before. Having ARCH_HIBERNATION_POSSIBLE under >>> config PPC makes more sense. >>
Re: [PATCH] powerpc: Restrict ARCH_HIBERNATION_POSSIBLE to supported configurations
On 17/11/23 4:52 am, Michael Ellerman wrote: > Vishal Chourasia writes: >> On 15/11/23 5:46 pm, Aneesh Kumar K V wrote: >>> On 11/15/23 5:23 PM, Vishal Chourasia wrote: On 15/11/23 1:39 pm, Aneesh Kumar K.V wrote: > Vishal Chourasia writes: > >> This patch modifies the ARCH_HIBERNATION_POSSIBLE option to ensure that >> it >> correctly depends on these PowerPC configurations being enabled. As a >> result, >> it prevents the HOTPLUG_CPU from being selected when the required >> dependencies >> are not satisfied. >> >> This change aligns the dependency tree with the expected hardware >> support for >> CPU hot-plugging under PowerPC architectures, ensuring that the kernel >> configuration steps do not lead to inconsistent states. >> >> Signed-off-by: Vishal Chourasia >> --- >> During the configuration process with 'make randconfig' followed by >> 'make olddefconfig', we observed a warning indicating an unmet direct >> dependency for the HOTPLUG_CPU option. The dependency in question >> relates to >> various PowerPC configurations (PPC_PSERIES, PPC_PMAC, PPC_POWERNV, >> FSL_SOC_BOOKE) which were not enabled, yet the HOTPLUG_CPU was >> beingDuring the configuration process with 'make randconfig' followed by >> 'make olddefconfig', we observed a warning indicating an unmet direct >> dependency for the HOTPLUG_CPU option. The dependency in question >> relates to >> various PowerPC configurations (PPC_PSERIES, PPC_PMAC, PPC_POWERNV, >> FSL_SOC_BOOKE) which were not enabled, yet the HOTPLUG_CPU was being >> erroneously selected due to an implicit assumption by the PM_SLEEP_SMP >> option. >> This misalignment in dependencies could potentially lead to inconsistent >> kernel >> configuration states, especially when considering the necessary hardware >> support for CPU hot-plugging on PowerPC platforms. The patch aims to >> correct >> this by ensuring that ARCH_HIBERNATION_POSSIBLE is contingent upon the >> appropriate PowerPC configurations being active. >> >> steps to reproduce (before applying the patch): >> >> Run 'make pseries_le_defconfig' >> Run 'make menuconfig' >> Enable hibernation [ Kernel options -> Hibernation (aka 'suspend to >> disk') ] >> Disable [ Platform support -> IBM PowerNV (Non-Virtualized) platform >> support ] >> Disable [ Platform support -> IBM pSeries & new (POWER5-based) iSeries ] >> Enable SMP [ Processor support -> Symmetric multi-processing support ] >> Save the config >> Run 'make olddefconfig' >> erroneously selected due to an implicit assumption by the PM_SLEEP_SMP >> option. >> This misalignment in dependencies could potentially lead to inconsistent >> kernel >> configuration states, especially when considering the necessary hardware >> support for CPU hot-plugging on PowerPC platforms. The patch aims to >> correct >> this by ensuring that ARCH_HIBERNATION_POSSIBLE is contingent upon the >> appropriate PowerPC configurations being active. >> >> steps to reproduce (before applying the patch): >> >> Run 'make pseries_le_defconfig' >> Run 'make menuconfig' >> Enable hibernation [ Kernel options -> Hibernation (aka 'suspend to >> disk') ] >> Disable [ Platform support -> IBM PowerNV (Non-Virtualized) platform >> support ] >> Disable [ Platform support -> IBM pSeries & new (POWER5-based) iSeries ] >> Enable SMP [ Processor support -> Symmetric multi-processing support ] >> Save the config >> Run 'make olddefconfig' >> >> arch/powerpc/Kconfig | 5 +++-- >> 1 file changed, 3 insertions(+), 2 deletions(-) >> >> diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig >> index 6f105ee4f3cf..bf99ff9869f6 100644 >> --- a/arch/powerpc/Kconfig >> +++ b/arch/powerpc/Kconfig >> @@ -380,8 +380,9 @@ config DEFAULT_UIMAGE >>Used to allow a board to specify it wants a uImage built by >> default >> >> config ARCH_HIBERNATION_POSSIBLE >> -bool >> -default y >> +def_bool y >> +depends on PPC_PSERIES || \ >> +PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE >> >> config ARCH_SUSPEND_POSSIBLE >> def_bool y >> > I am wondering whether it should be switched to using select from > config PPC? > > selecting ARCH_HIBERNATION_POSSIBLE based on value of config PPC > will not guarantee config PPC_PSERIES being set > > PPC_PSERIES can be set to N, even when config PPC is set. >> I understand what you meant before. Having ARCH_HIBERNATION_POSSIBLE under >> config PPC makes more sense. > grep -A 5 -i "config ppc_pseries" arch/powerpc/platforms/pseries/Kconfig > config PPC_PSERIES > depends on PPC64 &&
Re: [PATCH] powerpc: Restrict ARCH_HIBERNATION_POSSIBLE to supported configurations
On 17/11/23 4:52 am, Michael Ellerman wrote: > Vishal Chourasia writes: >> On 15/11/23 5:46 pm, Aneesh Kumar K V wrote: >>> On 11/15/23 5:23 PM, Vishal Chourasia wrote: On 15/11/23 1:39 pm, Aneesh Kumar K.V wrote: > Vishal Chourasia writes: > >> This patch modifies the ARCH_HIBERNATION_POSSIBLE option to ensure that >> it >> correctly depends on these PowerPC configurations being enabled. As a >> result, >> it prevents the HOTPLUG_CPU from being selected when the required >> dependencies >> are not satisfied. >> >> This change aligns the dependency tree with the expected hardware >> support for >> CPU hot-plugging under PowerPC architectures, ensuring that the kernel >> configuration steps do not lead to inconsistent states. >> >> Signed-off-by: Vishal Chourasia >> --- >> During the configuration process with 'make randconfig' followed by >> 'make olddefconfig', we observed a warning indicating an unmet direct >> dependency for the HOTPLUG_CPU option. The dependency in question >> relates to >> various PowerPC configurations (PPC_PSERIES, PPC_PMAC, PPC_POWERNV, >> FSL_SOC_BOOKE) which were not enabled, yet the HOTPLUG_CPU was being >> erroneously selected due to an implicit assumption by the PM_SLEEP_SMP >> option. >> This misalignment in dependencies could potentially lead to inconsistent >> kernel >> configuration states, especially when considering the necessary hardware >> support for CPU hot-plugging on PowerPC platforms. The patch aims to >> correct >> this by ensuring that ARCH_HIBERNATION_POSSIBLE is contingent upon the >> appropriate PowerPC configurations being active. >> >> steps to reproduce (before applying the patch): >> >> Run 'make pseries_le_defconfig' >> Run 'make menuconfig' >> Enable hibernation [ Kernel options -> Hibernation (aka 'suspend to >> disk') ] >> Disable [ Platform support -> IBM PowerNV (Non-Virtualized) platform >> support ] >> Disable [ Platform support -> IBM pSeries & new (POWER5-based) iSeries ] >> Enable SMP [ Processor support -> Symmetric multi-processing support ] >> Save the config >> Run 'make olddefconfig' >> >> arch/powerpc/Kconfig | 5 +++-- >> 1 file changed, 3 insertions(+), 2 deletions(-) >> >> diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig >> index 6f105ee4f3cf..bf99ff9869f6 100644 >> --- a/arch/powerpc/Kconfig >> +++ b/arch/powerpc/Kconfig >> @@ -380,8 +380,9 @@ config DEFAULT_UIMAGE >>Used to allow a board to specify it wants a uImage built by >> default >> >> config ARCH_HIBERNATION_POSSIBLE >> -bool >> -default y >> +def_bool y >> +depends on PPC_PSERIES || \ >> +PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE >> >> config ARCH_SUSPEND_POSSIBLE >> def_bool y >> > I am wondering whether it should be switched to using select from > config PPC? > > selecting ARCH_HIBERNATION_POSSIBLE based on value of config PPC > will not guarantee config PPC_PSERIES being set > > PPC_PSERIES can be set to N, even when config PPC is set. >> I understand what you meant before. Having ARCH_HIBERNATION_POSSIBLE under >> config PPC makes more sense. > grep -A 5 -i "config ppc_pseries" arch/powerpc/platforms/pseries/Kconfig > config PPC_PSERIES > depends on PPC64 && PPC_BOOK3S > bool "IBM pSeries & new (POWER5-based) iSeries" > select HAVE_PCSPKR_PLATFORM > select MPIC > select OF_DYNAMIC > >>> modified arch/powerpc/Kconfig >>> @@ -156,6 +156,7 @@ config PPC >>> select ARCH_HAS_UACCESS_FLUSHCACHE >>> select ARCH_HAS_UBSAN_SANITIZE_ALL >>> select ARCH_HAVE_NMI_SAFE_CMPXCHG >>> + select ARCH_HIBERNATION_POSSIBLEif (PPC_PSERIES || PPC_PMAC || >>> PPC_POWERNV || FSL_SOC_BOOKE) >>> select ARCH_KEEP_MEMBLOCK >>> select ARCH_MHP_MEMMAP_ON_MEMORY_ENABLE if PPC_RADIX_MMU >>> select ARCH_MIGHT_HAVE_PC_PARPORT >> Though, even with these changes I was able to reproduce same warnings. >> (using steps from above) >> It's because one can enable HIBERNATION manually. > But how? You shouldn't be able to enable it manually, it depends on > ARCH_HIBERNATION_POSSIBLE which shouldn't be enabled. > > For the above to work you also need to make it default n, eg: > > diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig > index 6f105ee4f3cf..dd2a9b938188 100644 > --- a/arch/powerpc/Kconfig > +++ b/arch/powerpc/Kconfig > @@ -380,8 +380,7 @@ config DEFAULT_UIMAGE > Used to allow a board to specify it wants a uImage built by default > > config ARCH_HIBERNATION_POSSIBLE > - bool > - default y > + def_bool n > > config ARCH_SUSPEND_POSSIBLE > def_bool y Verified.
Re: [PATCH] powerpc: Restrict ARCH_HIBERNATION_POSSIBLE to supported configurations
Vishal Chourasia writes: > On 15/11/23 5:46 pm, Aneesh Kumar K V wrote: >> On 11/15/23 5:23 PM, Vishal Chourasia wrote: >>> On 15/11/23 1:39 pm, Aneesh Kumar K.V wrote: Vishal Chourasia writes: > This patch modifies the ARCH_HIBERNATION_POSSIBLE option to ensure that it > correctly depends on these PowerPC configurations being enabled. As a > result, > it prevents the HOTPLUG_CPU from being selected when the required > dependencies > are not satisfied. > > This change aligns the dependency tree with the expected hardware support > for > CPU hot-plugging under PowerPC architectures, ensuring that the kernel > configuration steps do not lead to inconsistent states. > > Signed-off-by: Vishal Chourasia > --- > During the configuration process with 'make randconfig' followed by > 'make olddefconfig', we observed a warning indicating an unmet direct > dependency for the HOTPLUG_CPU option. The dependency in question relates > to > various PowerPC configurations (PPC_PSERIES, PPC_PMAC, PPC_POWERNV, > FSL_SOC_BOOKE) which were not enabled, yet the HOTPLUG_CPU was being > erroneously selected due to an implicit assumption by the PM_SLEEP_SMP > option. > This misalignment in dependencies could potentially lead to inconsistent > kernel > configuration states, especially when considering the necessary hardware > support for CPU hot-plugging on PowerPC platforms. The patch aims to > correct > this by ensuring that ARCH_HIBERNATION_POSSIBLE is contingent upon the > appropriate PowerPC configurations being active. > > steps to reproduce (before applying the patch): > > Run 'make pseries_le_defconfig' > Run 'make menuconfig' > Enable hibernation [ Kernel options -> Hibernation (aka 'suspend to > disk') ] > Disable [ Platform support -> IBM PowerNV (Non-Virtualized) platform > support ] > Disable [ Platform support -> IBM pSeries & new (POWER5-based) iSeries ] > Enable SMP [ Processor support -> Symmetric multi-processing support ] > Save the config > Run 'make olddefconfig' > > arch/powerpc/Kconfig | 5 +++-- > 1 file changed, 3 insertions(+), 2 deletions(-) > > diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig > index 6f105ee4f3cf..bf99ff9869f6 100644 > --- a/arch/powerpc/Kconfig > +++ b/arch/powerpc/Kconfig > @@ -380,8 +380,9 @@ config DEFAULT_UIMAGE > Used to allow a board to specify it wants a uImage built by default > > config ARCH_HIBERNATION_POSSIBLE > - bool > - default y > + def_bool y > + depends on PPC_PSERIES || \ > + PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE > > config ARCH_SUSPEND_POSSIBLE > def_bool y > I am wondering whether it should be switched to using select from config PPC? selecting ARCH_HIBERNATION_POSSIBLE based on value of config PPC will not guarantee config PPC_PSERIES being set PPC_PSERIES can be set to N, even when config PPC is set. > I understand what you meant before. Having ARCH_HIBERNATION_POSSIBLE under > config PPC makes more sense. grep -A 5 -i "config ppc_pseries" arch/powerpc/platforms/pseries/Kconfig config PPC_PSERIES depends on PPC64 && PPC_BOOK3S bool "IBM pSeries & new (POWER5-based) iSeries" select HAVE_PCSPKR_PLATFORM select MPIC select OF_DYNAMIC >> modified arch/powerpc/Kconfig >> @@ -156,6 +156,7 @@ config PPC >> select ARCH_HAS_UACCESS_FLUSHCACHE >> select ARCH_HAS_UBSAN_SANITIZE_ALL >> select ARCH_HAVE_NMI_SAFE_CMPXCHG >> +select ARCH_HIBERNATION_POSSIBLEif (PPC_PSERIES || PPC_PMAC || >> PPC_POWERNV || FSL_SOC_BOOKE) >> select ARCH_KEEP_MEMBLOCK >> select ARCH_MHP_MEMMAP_ON_MEMORY_ENABLE if PPC_RADIX_MMU >> select ARCH_MIGHT_HAVE_PC_PARPORT > > Though, even with these changes I was able to reproduce same warnings. (using > steps from above) > It's because one can enable HIBERNATION manually. But how? You shouldn't be able to enable it manually, it depends on ARCH_HIBERNATION_POSSIBLE which shouldn't be enabled. For the above to work you also need to make it default n, eg: diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 6f105ee4f3cf..dd2a9b938188 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -380,8 +380,7 @@ config DEFAULT_UIMAGE Used to allow a board to specify it wants a uImage built by default config ARCH_HIBERNATION_POSSIBLE - bool - default y + def_bool n config ARCH_SUSPEND_POSSIBLE def_bool y cheers
Re: [PATCH] powerpc: Restrict ARCH_HIBERNATION_POSSIBLE to supported configurations
On 15/11/23 5:46 pm, Aneesh Kumar K V wrote: > On 11/15/23 5:23 PM, Vishal Chourasia wrote: >> On 15/11/23 1:39 pm, Aneesh Kumar K.V wrote: >>> Vishal Chourasia writes: >>> This patch modifies the ARCH_HIBERNATION_POSSIBLE option to ensure that it correctly depends on these PowerPC configurations being enabled. As a result, it prevents the HOTPLUG_CPU from being selected when the required dependencies are not satisfied. This change aligns the dependency tree with the expected hardware support for CPU hot-plugging under PowerPC architectures, ensuring that the kernel configuration steps do not lead to inconsistent states. Signed-off-by: Vishal Chourasia --- During the configuration process with 'make randconfig' followed by 'make olddefconfig', we observed a warning indicating an unmet direct dependency for the HOTPLUG_CPU option. The dependency in question relates to various PowerPC configurations (PPC_PSERIES, PPC_PMAC, PPC_POWERNV, FSL_SOC_BOOKE) which were not enabled, yet the HOTPLUG_CPU was being erroneously selected due to an implicit assumption by the PM_SLEEP_SMP option. This misalignment in dependencies could potentially lead to inconsistent kernel configuration states, especially when considering the necessary hardware support for CPU hot-plugging on PowerPC platforms. The patch aims to correct this by ensuring that ARCH_HIBERNATION_POSSIBLE is contingent upon the appropriate PowerPC configurations being active. steps to reproduce (before applying the patch): Run 'make pseries_le_defconfig' Run 'make menuconfig' Enable hibernation [ Kernel options -> Hibernation (aka 'suspend to disk') ] Disable [ Platform support -> IBM PowerNV (Non-Virtualized) platform support ] Disable [ Platform support -> IBM pSeries & new (POWER5-based) iSeries ] Enable SMP [ Processor support -> Symmetric multi-processing support ] Save the config Run 'make olddefconfig' arch/powerpc/Kconfig | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 6f105ee4f3cf..bf99ff9869f6 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -380,8 +380,9 @@ config DEFAULT_UIMAGE Used to allow a board to specify it wants a uImage built by default config ARCH_HIBERNATION_POSSIBLE - bool - default y + def_bool y + depends on PPC_PSERIES || \ + PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE config ARCH_SUSPEND_POSSIBLE def_bool y >>> I am wondering whether it should be switched to using select from >>> config PPC? >>> >>> selecting ARCH_HIBERNATION_POSSIBLE based on value of config PPC >>> will not guarantee config PPC_PSERIES being set >>> >>> PPC_PSERIES can be set to N, even when config PPC is set. I understand what you meant before. Having ARCH_HIBERNATION_POSSIBLE under config PPC makes more sense. >>> grep -A 5 -i "config ppc_pseries" arch/powerpc/platforms/pseries/Kconfig >>> config PPC_PSERIES >>> depends on PPC64 && PPC_BOOK3S >>> bool "IBM pSeries & new (POWER5-based) iSeries" >>> select HAVE_PCSPKR_PLATFORM >>> select MPIC >>> select OF_DYNAMIC >>> > modified arch/powerpc/Kconfig > @@ -156,6 +156,7 @@ config PPC > select ARCH_HAS_UACCESS_FLUSHCACHE > select ARCH_HAS_UBSAN_SANITIZE_ALL > select ARCH_HAVE_NMI_SAFE_CMPXCHG > + select ARCH_HIBERNATION_POSSIBLEif (PPC_PSERIES || PPC_PMAC || > PPC_POWERNV || FSL_SOC_BOOKE) > select ARCH_KEEP_MEMBLOCK > select ARCH_MHP_MEMMAP_ON_MEMORY_ENABLE if PPC_RADIX_MMU > select ARCH_MIGHT_HAVE_PC_PARPORT Though, even with these changes I was able to reproduce same warnings. (using steps from above) It's because one can enable HIBERNATION manually. As these warnings were observed through make randconfig, there is still a chance that randconfig may result in a permutation that may produce these warnings again. > > -aneesh
Re: [PATCH] powerpc: Restrict ARCH_HIBERNATION_POSSIBLE to supported configurations
On 11/15/23 5:23 PM, Vishal Chourasia wrote: > > On 15/11/23 1:39 pm, Aneesh Kumar K.V wrote: >> Vishal Chourasia writes: >> >>> This patch modifies the ARCH_HIBERNATION_POSSIBLE option to ensure that it >>> correctly depends on these PowerPC configurations being enabled. As a >>> result, >>> it prevents the HOTPLUG_CPU from being selected when the required >>> dependencies >>> are not satisfied. >>> >>> This change aligns the dependency tree with the expected hardware support >>> for >>> CPU hot-plugging under PowerPC architectures, ensuring that the kernel >>> configuration steps do not lead to inconsistent states. >>> >>> Signed-off-by: Vishal Chourasia >>> --- >>> During the configuration process with 'make randconfig' followed by >>> 'make olddefconfig', we observed a warning indicating an unmet direct >>> dependency for the HOTPLUG_CPU option. The dependency in question relates to >>> various PowerPC configurations (PPC_PSERIES, PPC_PMAC, PPC_POWERNV, >>> FSL_SOC_BOOKE) which were not enabled, yet the HOTPLUG_CPU was being >>> erroneously selected due to an implicit assumption by the PM_SLEEP_SMP >>> option. >>> This misalignment in dependencies could potentially lead to inconsistent >>> kernel >>> configuration states, especially when considering the necessary hardware >>> support for CPU hot-plugging on PowerPC platforms. The patch aims to correct >>> this by ensuring that ARCH_HIBERNATION_POSSIBLE is contingent upon the >>> appropriate PowerPC configurations being active. >>> >>> steps to reproduce (before applying the patch): >>> >>> Run 'make pseries_le_defconfig' >>> Run 'make menuconfig' >>> Enable hibernation [ Kernel options -> Hibernation (aka 'suspend to disk') >>> ] >>> Disable [ Platform support -> IBM PowerNV (Non-Virtualized) platform >>> support ] >>> Disable [ Platform support -> IBM pSeries & new (POWER5-based) iSeries ] >>> Enable SMP [ Processor support -> Symmetric multi-processing support ] >>> Save the config >>> Run 'make olddefconfig' >>> >>> arch/powerpc/Kconfig | 5 +++-- >>> 1 file changed, 3 insertions(+), 2 deletions(-) >>> >>> diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig >>> index 6f105ee4f3cf..bf99ff9869f6 100644 >>> --- a/arch/powerpc/Kconfig >>> +++ b/arch/powerpc/Kconfig >>> @@ -380,8 +380,9 @@ config DEFAULT_UIMAGE >>> Used to allow a board to specify it wants a uImage built by default >>> >>> config ARCH_HIBERNATION_POSSIBLE >>> - bool >>> - default y >>> + def_bool y >>> + depends on PPC_PSERIES || \ >>> + PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE >>> >>> config ARCH_SUSPEND_POSSIBLE >>> def_bool y >>> >> I am wondering whether it should be switched to using select from >> config PPC? > > selecting ARCH_HIBERNATION_POSSIBLE based on value of config PPC > will not guarantee config PPC_PSERIES being set > > PPC_PSERIES can be set to N, even when config PPC is set. > > grep -A 5 -i "config ppc_pseries" arch/powerpc/platforms/pseries/Kconfig > config PPC_PSERIES > depends on PPC64 && PPC_BOOK3S > bool "IBM pSeries & new (POWER5-based) iSeries" > select HAVE_PCSPKR_PLATFORM > select MPIC > select OF_DYNAMIC > modified arch/powerpc/Kconfig @@ -156,6 +156,7 @@ config PPC select ARCH_HAS_UACCESS_FLUSHCACHE select ARCH_HAS_UBSAN_SANITIZE_ALL select ARCH_HAVE_NMI_SAFE_CMPXCHG + select ARCH_HIBERNATION_POSSIBLEif (PPC_PSERIES || PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE) select ARCH_KEEP_MEMBLOCK select ARCH_MHP_MEMMAP_ON_MEMORY_ENABLE if PPC_RADIX_MMU select ARCH_MIGHT_HAVE_PC_PARPORT -aneesh
Re: [PATCH] powerpc: Restrict ARCH_HIBERNATION_POSSIBLE to supported configurations
On 15/11/23 1:39 pm, Aneesh Kumar K.V wrote: > Vishal Chourasia writes: > >> This patch modifies the ARCH_HIBERNATION_POSSIBLE option to ensure that it >> correctly depends on these PowerPC configurations being enabled. As a result, >> it prevents the HOTPLUG_CPU from being selected when the required >> dependencies >> are not satisfied. >> >> This change aligns the dependency tree with the expected hardware support for >> CPU hot-plugging under PowerPC architectures, ensuring that the kernel >> configuration steps do not lead to inconsistent states. >> >> Signed-off-by: Vishal Chourasia >> --- >> During the configuration process with 'make randconfig' followed by >> 'make olddefconfig', we observed a warning indicating an unmet direct >> dependency for the HOTPLUG_CPU option. The dependency in question relates to >> various PowerPC configurations (PPC_PSERIES, PPC_PMAC, PPC_POWERNV, >> FSL_SOC_BOOKE) which were not enabled, yet the HOTPLUG_CPU was being >> erroneously selected due to an implicit assumption by the PM_SLEEP_SMP >> option. >> This misalignment in dependencies could potentially lead to inconsistent >> kernel >> configuration states, especially when considering the necessary hardware >> support for CPU hot-plugging on PowerPC platforms. The patch aims to correct >> this by ensuring that ARCH_HIBERNATION_POSSIBLE is contingent upon the >> appropriate PowerPC configurations being active. >> >> steps to reproduce (before applying the patch): >> >> Run 'make pseries_le_defconfig' >> Run 'make menuconfig' >> Enable hibernation [ Kernel options -> Hibernation (aka 'suspend to disk') ] >> Disable [ Platform support -> IBM PowerNV (Non-Virtualized) platform support >> ] >> Disable [ Platform support -> IBM pSeries & new (POWER5-based) iSeries ] >> Enable SMP [ Processor support -> Symmetric multi-processing support ] >> Save the config >> Run 'make olddefconfig' >> >> arch/powerpc/Kconfig | 5 +++-- >> 1 file changed, 3 insertions(+), 2 deletions(-) >> >> diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig >> index 6f105ee4f3cf..bf99ff9869f6 100644 >> --- a/arch/powerpc/Kconfig >> +++ b/arch/powerpc/Kconfig >> @@ -380,8 +380,9 @@ config DEFAULT_UIMAGE >>Used to allow a board to specify it wants a uImage built by default >> >> config ARCH_HIBERNATION_POSSIBLE >> -bool >> -default y >> +def_bool y >> +depends on PPC_PSERIES || \ >> +PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE >> >> config ARCH_SUSPEND_POSSIBLE >> def_bool y >> > I am wondering whether it should be switched to using select from > config PPC? selecting ARCH_HIBERNATION_POSSIBLE based on value of config PPC will not guarantee config PPC_PSERIES being set PPC_PSERIES can be set to N, even when config PPC is set. grep -A 5 -i "config ppc_pseries" arch/powerpc/platforms/pseries/Kconfig config PPC_PSERIES depends on PPC64 && PPC_BOOK3S bool "IBM pSeries & new (POWER5-based) iSeries" select HAVE_PCSPKR_PLATFORM select MPIC select OF_DYNAMIC > > -aneesh
Re: [PATCH] powerpc: Restrict ARCH_HIBERNATION_POSSIBLE to supported configurations
Vishal Chourasia writes: > This patch modifies the ARCH_HIBERNATION_POSSIBLE option to ensure that it > correctly depends on these PowerPC configurations being enabled. As a result, > it prevents the HOTPLUG_CPU from being selected when the required dependencies > are not satisfied. > > This change aligns the dependency tree with the expected hardware support for > CPU hot-plugging under PowerPC architectures, ensuring that the kernel > configuration steps do not lead to inconsistent states. > > Signed-off-by: Vishal Chourasia > --- > During the configuration process with 'make randconfig' followed by > 'make olddefconfig', we observed a warning indicating an unmet direct > dependency for the HOTPLUG_CPU option. The dependency in question relates to > various PowerPC configurations (PPC_PSERIES, PPC_PMAC, PPC_POWERNV, > FSL_SOC_BOOKE) which were not enabled, yet the HOTPLUG_CPU was being > erroneously selected due to an implicit assumption by the PM_SLEEP_SMP option. > This misalignment in dependencies could potentially lead to inconsistent > kernel > configuration states, especially when considering the necessary hardware > support for CPU hot-plugging on PowerPC platforms. The patch aims to correct > this by ensuring that ARCH_HIBERNATION_POSSIBLE is contingent upon the > appropriate PowerPC configurations being active. > > steps to reproduce (before applying the patch): > > Run 'make pseries_le_defconfig' > Run 'make menuconfig' > Enable hibernation [ Kernel options -> Hibernation (aka 'suspend to disk') ] > Disable [ Platform support -> IBM PowerNV (Non-Virtualized) platform support ] > Disable [ Platform support -> IBM pSeries & new (POWER5-based) iSeries ] > Enable SMP [ Processor support -> Symmetric multi-processing support ] > Save the config > Run 'make olddefconfig' > > arch/powerpc/Kconfig | 5 +++-- > 1 file changed, 3 insertions(+), 2 deletions(-) > > diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig > index 6f105ee4f3cf..bf99ff9869f6 100644 > --- a/arch/powerpc/Kconfig > +++ b/arch/powerpc/Kconfig > @@ -380,8 +380,9 @@ config DEFAULT_UIMAGE > Used to allow a board to specify it wants a uImage built by default > > config ARCH_HIBERNATION_POSSIBLE > - bool > - default y > + def_bool y > + depends on PPC_PSERIES || \ > + PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE > > config ARCH_SUSPEND_POSSIBLE > def_bool y > I am wondering whether it should be switched to using select from config PPC? -aneesh
[PATCH] powerpc: Restrict ARCH_HIBERNATION_POSSIBLE to supported configurations
This patch modifies the ARCH_HIBERNATION_POSSIBLE option to ensure that it correctly depends on these PowerPC configurations being enabled. As a result, it prevents the HOTPLUG_CPU from being selected when the required dependencies are not satisfied. This change aligns the dependency tree with the expected hardware support for CPU hot-plugging under PowerPC architectures, ensuring that the kernel configuration steps do not lead to inconsistent states. Signed-off-by: Vishal Chourasia --- During the configuration process with 'make randconfig' followed by 'make olddefconfig', we observed a warning indicating an unmet direct dependency for the HOTPLUG_CPU option. The dependency in question relates to various PowerPC configurations (PPC_PSERIES, PPC_PMAC, PPC_POWERNV, FSL_SOC_BOOKE) which were not enabled, yet the HOTPLUG_CPU was being erroneously selected due to an implicit assumption by the PM_SLEEP_SMP option. This misalignment in dependencies could potentially lead to inconsistent kernel configuration states, especially when considering the necessary hardware support for CPU hot-plugging on PowerPC platforms. The patch aims to correct this by ensuring that ARCH_HIBERNATION_POSSIBLE is contingent upon the appropriate PowerPC configurations being active. steps to reproduce (before applying the patch): Run 'make pseries_le_defconfig' Run 'make menuconfig' Enable hibernation [ Kernel options -> Hibernation (aka 'suspend to disk') ] Disable [ Platform support -> IBM PowerNV (Non-Virtualized) platform support ] Disable [ Platform support -> IBM pSeries & new (POWER5-based) iSeries ] Enable SMP [ Processor support -> Symmetric multi-processing support ] Save the config Run 'make olddefconfig' arch/powerpc/Kconfig | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 6f105ee4f3cf..bf99ff9869f6 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -380,8 +380,9 @@ config DEFAULT_UIMAGE Used to allow a board to specify it wants a uImage built by default config ARCH_HIBERNATION_POSSIBLE - bool - default y + def_bool y + depends on PPC_PSERIES || \ + PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE config ARCH_SUSPEND_POSSIBLE def_bool y -- 2.41.0
