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Recent patch fixed an old commit
'fc2a5a6161a2 ("powerpc/64s: ppc_save_regs is now needed for all 64s builds")'
which is to include building of ppc_save_reg.c only when XMON
and KEXEC_CORE and PPC_BOOK3S are enabled. This was valid, since
ppc_save_regs was called only in replay_system_reset() of old
irq.c which was under BOOK3S.
But there has been multiple refactoring of irq.c and have
added call to ppc_save_regs() from __replay_soft_interrupts
-> replay_soft_interrupts which is part of irq_64.c included
under CONFIG_PPC64. And since ppc_save_regs is called in
CRASH_DUMP path as part of crash_setup_regs in kexec.h,
CONFIG_PPC32 also needs it.
So with this recent patch which enabled the building of
ppc_save_regs.c caused a build break when none of these
(XMON, KEXEC_CORE, BOOK3S) where enabled as part of config.
Patch to enable building of ppc_save_regs.c by defaults.
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Link: https://patch.msgid.link/20250511041111.841158-1-maddy@linux.ibm.com
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The name is Mimi Phuong-Thao Vo.
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Link: https://patch.msgid.link/20241110162139.5179-2-thorsten.blum@linux.dev
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htmdump_init calls is_kvm_guest() to check for guest environment.
is_kvm_guest() is defined in kvm_guest.h header file. Without including
the header file, build hits error failing to find the function.
arch/powerpc/platforms/pseries/htmdump.c: In function 'htmdump_init':
arch/powerpc/platforms/pseries/htmdump.c:469:6: error: implicit declaration of function 'is_kvm_guest';
did you mean '__key_get'? [-Werror=implicit-function-declaration]
if (is_kvm_guest()) {
^~~~~~~~~~~~
__key_get
This is observed in configs where CONFIG_KVM_GUEST is disabled.
Include header file explicitly to avoid the build error
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202505061324.elUl4njU-lkp@intel.com/
Signed-off-by: Athira Rajeev <atrajeev@linux.ibm.com>
Tested-by: Venkat Rao Bagalkote <venkat88@linux.ibm.com>
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Link: https://patch.msgid.link/20250506135232.69014-1-atrajeev@linux.ibm.com
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The commit 9576730d0e6e ("KVM: PPC: select IRQ_BYPASS_MANAGER") enabled
IRQ_BYPASS_MANAGER when CONFIG_KVM was set. Subsequently, commit
c57875f5f9be ("KVM: PPC: Book3S HV: Enable IRQ bypass") enabled IRQ
bypass and added the necessary callbacks to create/remove the mappings
between host real IRQ and the guest GSI.
The availability of IRQ bypass is determined by the arch-specific
function kvm_arch_has_irq_bypass(), which invokes
kvmppc_irq_bypass_add_producer_hv(). This function, in turn, calls
kvmppc_set_passthru_irq_hv() to create a mapping in the passthrough IRQ
map, associating a host IRQ to a guest GSI.
However, when a pSeries KVM guest (L2) is booted within an LPAR (L1)
with the kernel boot parameter `xive=off`, it defaults to using emulated
XICS controller. As an attempt to establish host IRQ to guest GSI
mappings via kvmppc_set_passthru_irq() on a PCI device hotplug
(passhthrough) operation fail, returning -ENOENT. This failure occurs
because only interrupts with EOI operations handled through OPAL calls
(verified via is_pnv_opal_msi()) are currently supported.
These mapping failures lead to below repeated warnings in the L1 host:
[ 509.220349] kvmppc_set_passthru_irq_hv: Could not assign IRQ map for (58,4970)
[ 509.220368] kvmppc_set_passthru_irq (irq 58, gsi 4970) fails: -2
[ 509.220376] vfio-pci 0015:01:00.0: irq bypass producer (token 0000000090bc635b) registration fails: -2
...
[ 509.291781] vfio-pci 0015:01:00.0: irq bypass producer (token 000000003822eed8) registration fails: -2
Fix this by restricting IRQ bypass enablement on pSeries systems by
making the IRQ bypass callbacks unavailable when running on pSeries
platform.
Signed-off-by: Amit Machhiwal <amachhiw@linux.ibm.com>
Tested-by: Gautam Menghani <gautam@linux.ibm.com>
Reviewed-by: Vaibhav Jain <vaibhav@linux.ibm.com>
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Link: https://patch.msgid.link/20250425185641.1611857-1-amachhiw@linux.ibm.com
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8xx has three large page sizes: 8M, 512k and 16k.
A too big alignment can lead to wasting memory. On a board which has
only 32 MBytes of RAM, every single byte is worth it and a 512k
alignment is sometimes too much.
Allow mapping kernel memory with 16k pages and reduce the constraint
on kernel memory alignment. 512k and 16k pages are handled the same
way so reverse tests in order to make 8M pages the special case and
other ones (512k and 16k) the alternative.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Link: https://patch.msgid.link/fa9927b70df13627cdf10b992ea71d6562c7760e.1746191262.git.christophe.leroy@csgroup.eu
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Similar to x86 the ppc boot code does not build with GCC 15.
Copy the fix from
commit ee2ab467bddf ("x86/boot: Use '-std=gnu11' to fix build with GCC 15")
Signed-off-by: Michal Suchanek <msuchanek@suse.de>
Tested-by: Amit Machhiwal <amachhiw@linux.ibm.com>
Tested-by: Venkat Rao Bagalkote <venkat88@linux.ibm.com>
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Link: https://patch.msgid.link/20250331105722.19709-1-msuchanek@suse.de
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Madhavan Srinivasan
Thorsten Blum
Athira Rajeev
Amit Machhiwal
Christophe Leroy
Michal Suchanek