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2014-09-25powerpc: Remove stale function prototypesAnton Blanchard
There were a number of prototypes for functions that no longer exist. Remove them. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2014-09-25powerpc: Ensure global functions include their prototypeAnton Blanchard
Fix a number of places where global functions were not including their prototype. This ensures the prototype and the function match. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2014-09-25powerpc: Make a bunch of things staticAnton Blanchard
Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2014-09-25powerpc: Separate ppc32 symbol exports into ppc_ksyms_32.cAnton Blanchard
Simplify things considerably by moving all the ppc32 specific symbol exports into its own file. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2014-09-25powerpc: Move lib symbol exports into arch/powerpc/lib/ppc_ksyms.cAnton Blanchard
Move the lib symbol exports closer to their function definitions Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2014-09-25powerpc: Remove unused 32bit symbol exportsAnton Blanchard
Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2014-09-25powerpc: Move more symbol exports next to function definitionsAnton Blanchard
Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2014-09-25powerpc: Move via-cuda symbol exports next to function definitionsAnton Blanchard
Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2014-09-25powerpc: Move adb symbol exports next to function definitionsAnton Blanchard
Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2014-09-25powerpc/powernv: Check OPAL dump calls exist before usingMichael Neuling
Check that the OPAL_DUMP_READ token exists before initalising the elog infrastructure. This avoids littering the OPAL console with: "OPAL: Called with bad token 91" Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2014-09-25powerpc/powernv: Check OPAL elog calls exist before usingMichael Neuling
Check that the OPAL_ELOG_READ token exists before initalising the elog infrastructure. This avoids littering the OPAL console with: "OPAL: Called with bad token 74" Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2014-09-25powerpc/powernv: Check OPAL RTC calls exists before usingMichael Neuling
Check that the OPAL_RTC_READ token exists before we use the OPAL RTC. Refactors the code a little to merge error paths. This avoids littering the OPAL console with: "OPAL: Called with bad token 3". Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2014-09-25powerpc/powernv: Add OPAL check token callMichael Neuling
Currently there is no way to generically check if an OPAL call exists or not from the host kernel. This adds an OPAL call opal_check_token() which tells you if the given token is present in OPAL or not. Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2014-09-25powerpc: Fix build error with CONFIG_PCI=nPranith Kumar
Fix ppc 32 build failure as reported here: http://kisskb.ellerman.id.au/kisskb/buildresult/11663513/ The error is as follows: arch/powerpc/include/asm/floppy.h:142:20: error: 'isa_bridge_pcidev' undeclared (first use in this function) This is happening since floppy.o is enabled by BLK_DEV_FD which depends on ARCH_MAY_HAVE_PC_FDC which is in-turn enabled if PPC_PSERIES=n. The following commit changes the dependency so that ARCH_MAY_HAVE_PC_FDC is dependent exclusively on PCI since otherwise it will not compile. Signed-off-by: Pranith Kumar <bobby.prani@gmail.com> Reported-by: Geert Uytterhoeven <geert@linux-m68k.org> CC: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2014-09-25powerpc/boot: Don't install zImage.* from make installTony Breeds
in commit 29f1aff2c (powerpc: Copy bootable images in the default install script) we changed to copying all the built boot targets based on the assumption that it's backwards compatible. It turns out that debian devived installkernel scripts will barf if not given exactly 4 args. This change reverts make install to just install the vmlinux (we can change the dfault in a seperate patch) and introduces a new make zInstall which works with a more flexible installkernel script. Cc: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Tony Breeds <tony@bakeyournoodle.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2014-09-25powerpc/powernv: Improve error messages in dump codeVasant Hegde
Presently we only support initiating Service Processor dump from host. Hence update sysfs message. Also update couple of other error/info messages. Signed-off-by: Vasant Hegde <hegdevasant@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2014-09-24Merge tag 'signed-kvm-ppc-next' of git://github.com/agraf/linux-2.6 into ↵Paolo Bonzini
kvm-next Patch queue for ppc - 2014-09-24 New awesome things in this release: - E500: e6500 core support - E500: guest and remote debug support - Book3S: remote sw breakpoint support - Book3S: HV: Minor bugfixes Alexander Graf (1): KVM: PPC: Pass enum to kvmppc_get_last_inst Bharat Bhushan (8): KVM: PPC: BOOKE: allow debug interrupt at "debug level" KVM: PPC: BOOKE : Emulate rfdi instruction KVM: PPC: BOOKE: Allow guest to change MSR_DE KVM: PPC: BOOKE: Clear guest dbsr in userspace exit KVM_EXIT_DEBUG KVM: PPC: BOOKE: Guest and hardware visible debug registers are same KVM: PPC: BOOKE: Add one reg interface for DBSR KVM: PPC: BOOKE: Add one_reg documentation of SPRG9 and DBSR KVM: PPC: BOOKE: Emulate debug registers and exception Madhavan Srinivasan (2): powerpc/kvm: support to handle sw breakpoint powerpc/kvm: common sw breakpoint instr across ppc Michael Neuling (1): KVM: PPC: Book3S HV: Add register name when loading toc Mihai Caraman (10): powerpc/booke: Restrict SPE exception handlers to e200/e500 cores powerpc/booke: Revert SPE/AltiVec common defines for interrupt numbers KVM: PPC: Book3E: Increase FPU laziness KVM: PPC: Book3e: Add AltiVec support KVM: PPC: Make ONE_REG powerpc generic KVM: PPC: Move ONE_REG AltiVec support to powerpc KVM: PPC: Remove the tasklet used by the hrtimer KVM: PPC: Remove shared defines for SPE and AltiVec interrupts KVM: PPC: e500mc: Add support for single threaded vcpus on e6500 core KVM: PPC: Book3E: Enable e6500 core Paul Mackerras (2): KVM: PPC: Book3S HV: Increase timeout for grabbing secondary threads KVM: PPC: Book3S HV: Only accept host PVR value for guest PVR
2014-09-24Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller
2014-09-24powerpc: Update defconfigs which were missing CONFIG_NET.David S. Miller
Commit df568d8e ("scsi: Use 'depends' with LIBFC instead of 'select'.") removed what happened to be the only instance of 'select NET'. Defconfigs that were relying on the select now lack networking support. Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-24powerpc: Set CONFIG_NET=y in defconfigsMichal Marek
Commit 5d6be6a5 ("scsi_netlink : Make SCSI_NETLINK dependent on NET instead of selecting NET") removed what happened to be the only instance of 'select NET'. Defconfigs that were relying on the select now lack networking support. Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Cc: linuxppc-dev@lists.ozlabs.org Signed-off-by: Michal Marek <mmarek@suse.cz> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-24kvm: Add arch specific mmu notifier for page invalidationTang Chen
This will be used to let the guest run while the APIC access page is not pinned. Because subsequent patches will fill in the function for x86, place the (still empty) x86 implementation in the x86.c file instead of adding an inline function in kvm_host.h. Signed-off-by: Tang Chen <tangchen@cn.fujitsu.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-09-24kvm: Fix page ageing bugsAndres Lagar-Cavilla
1. We were calling clear_flush_young_notify in unmap_one, but we are within an mmu notifier invalidate range scope. The spte exists no more (due to range_start) and the accessed bit info has already been propagated (due to kvm_pfn_set_accessed). Simply call clear_flush_young. 2. We clear_flush_young on a primary MMU PMD, but this may be mapped as a collection of PTEs by the secondary MMU (e.g. during log-dirty). This required expanding the interface of the clear_flush_young mmu notifier, so a lot of code has been trivially touched. 3. In the absence of shadow_accessed_mask (e.g. EPT A bit), we emulate the access bit by blowing the spte. This requires proper synchronizing with MMU notifier consumers, like every other removal of spte's does. Signed-off-by: Andres Lagar-Cavilla <andreslc@google.com> Acked-by: Rik van Riel <riel@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-09-23sparc: simplify syscall_get_arch()Eric Paris
Include linux/thread_info.h so we can use is_32_bit_task() cleanly. Then just simplify syscall_get_arch() since is_32_bit_task() works for all configuration options. Suggested-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Eric Paris <eparis@redhat.com>
2014-09-23ARCH: AUDIT: audit_syscall_entry() should not require the archEric Paris
We have a function where the arch can be queried, syscall_get_arch(). So rather than have every single piece of arch specific code use and/or duplicate syscall_get_arch(), just have the audit code use the syscall_get_arch() code. Based-on-patch-by: Richard Briggs <rgb@redhat.com> Signed-off-by: Eric Paris <eparis@redhat.com> Cc: linux-alpha@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-ia64@vger.kernel.org Cc: microblaze-uclinux@itee.uq.edu.au Cc: linux-mips@linux-mips.org Cc: linux@lists.openrisc.net Cc: linux-parisc@vger.kernel.org Cc: linuxppc-dev@lists.ozlabs.org Cc: linux-s390@vger.kernel.org Cc: linux-sh@vger.kernel.org Cc: sparclinux@vger.kernel.org Cc: user-mode-linux-devel@lists.sourceforge.net Cc: linux-xtensa@linux-xtensa.org Cc: x86@kernel.org
2014-09-23ARCH: AUDIT: implement syscall_get_arch for all archesEric Paris
For all arches which support audit implement syscall_get_arch() They are all pretty easy and straight forward, stolen from how the call to audit_syscall_entry() determines the arch. Based-on-patch-by: Richard Briggs <rgb@redhat.com> Signed-off-by: Eric Paris <eparis@redhat.com> Cc: linux-ia64@vger.kernel.org Cc: microblaze-uclinux@itee.uq.edu.au Cc: linux-mips@linux-mips.org Cc: linux@lists.openrisc.net Cc: linux-parisc@vger.kernel.org Cc: linuxppc-dev@lists.ozlabs.org Cc: sparclinux@vger.kernel.org
2014-09-23Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller
Conflicts: arch/mips/net/bpf_jit.c drivers/net/can/flexcan.c Both the flexcan and MIPS bpf_jit conflicts were cases of simple overlapping changes. Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-23powerpc/pseries: Drop unnecessary continueHimangi Saraogi
Continue is not needed at the bottom of a loop. The Coccinelle semantic patch implementing this change is: @@ @@ for (...;...;...) { ... if (...) { ... - continue; } } Signed-off-by: Himangi Saraogi <himangi774@gmail.com> Acked-by: Julia Lawall <julia.lawall@lip6.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2014-09-22KVM: PPC: Pass enum to kvmppc_get_last_instAlexander Graf
The kvmppc_get_last_inst function recently received a facelift that allowed us to pass an enum of the type of instruction we want to read into it rather than an unreadable boolean. Unfortunately, not all callers ended up passing the enum. This wasn't really an issue as "true" and "false" happen to match the two enum values we have, but it's still hard to read. Update all callers of kvmppc_get_last_inst() to follow the new calling convention. Signed-off-by: Alexander Graf <agraf@suse.de>
2014-09-22powerpc/kvm: common sw breakpoint instr across ppcMadhavan Srinivasan
This patch extends the use of illegal instruction as software breakpoint instruction across the ppc platform. Patch extends booke program interrupt code to support software breakpoint. Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com> [agraf: Fix bookehv] Signed-off-by: Alexander Graf <agraf@suse.de>
2014-09-22powerpc/kvm: support to handle sw breakpointMadhavan Srinivasan
This patch adds kernel side support for software breakpoint. Design is that, by using an illegal instruction, we trap to hypervisor via Emulation Assistance interrupt, where we check for the illegal instruction and accordingly we return to Host or Guest. Patch also adds support for software breakpoint in PR KVM. Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2014-09-22KVM: PPC: Book3E: Enable e6500 coreMihai Caraman
Now that AltiVec and hardware thread support is in place enable e6500 core. Signed-off-by: Mihai Caraman <mihai.caraman@freescale.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2014-09-22KVM: PPC: e500mc: Add support for single threaded vcpus on e6500 coreMihai Caraman
ePAPR represents hardware threads as cpu node properties in device tree. So with existing QEMU, hardware threads are simply exposed as vcpus with one hardware thread. The e6500 core shares TLBs between hardware threads. Without tlb write conditional instruction, the Linux kernel uses per core mechanisms to protect against duplicate TLB entries. The guest is unable to detect real siblings threads, so it can't use the TLB protection mechanism. An alternative solution is to use the hypervisor to allocate different lpids to guest's vcpus that runs simultaneous on real siblings threads. On systems with two threads per core this patch halves the size of the lpid pool that the allocator sees and use two lpids per VM. Use even numbers to speedup vcpu lpid computation with consecutive lpids per VM: vm1 will use lpids 2 and 3, vm2 lpids 4 and 5, and so on. Signed-off-by: Mihai Caraman <mihai.caraman@freescale.com> [agraf: fix spelling] Signed-off-by: Alexander Graf <agraf@suse.de>
2014-09-22KVM: PPC: Book3S HV: Only accept host PVR value for guest PVRPaul Mackerras
Since the guest can read the machine's PVR (Processor Version Register) directly and see the real value, we should disallow userspace from setting any value for the guest's PVR other than the real host value. Therefore this makes kvm_arch_vcpu_set_sregs_hv() check the supplied PVR value and return an error if it is different from the host value, which has been put into vcpu->arch.pvr at vcpu creation time. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Alexander Graf <agraf@suse.de>
2014-09-22KVM: PPC: Book3S HV: Increase timeout for grabbing secondary threadsPaul Mackerras
Occasional failures have been seen with split-core mode and migration where the message "KVM: couldn't grab cpu" appears. This increases the length of time that we wait from 1ms to 10ms, which seems to work around the issue. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Alexander Graf <agraf@suse.de>
2014-09-22KVM: PPC: Remove shared defines for SPE and AltiVec interruptsMihai Caraman
We currently decide at compile-time which of the SPE or AltiVec units to support exclusively. Guard kernel defines with CONFIG_SPE_POSSIBLE and CONFIG_PPC_E500MC and remove shared defines. Signed-off-by: Mihai Caraman <mihai.caraman@freescale.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2014-09-22KVM: PPC: Remove the tasklet used by the hrtimerMihai Caraman
Powerpc timer implementation is a copycat version of s390. Now that they removed the tasklet with commit ea74c0ea1b24a6978a6ebc80ba4dbc7b7848b32d follow this optimization. Signed-off-by: Mihai Caraman <mihai.caraman@freescale.com> Signed-off-by: Bogdan Purcareata <bogdan.purcareata@freescale.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2014-09-22KVM: PPC: BOOKE: Emulate debug registers and exceptionBharat Bhushan
This patch emulates debug registers and debug exception to support guest using debug resource. This enables running gdb/kgdb etc in guest. On BOOKE architecture we cannot share debug resources between QEMU and guest because: When QEMU is using debug resources then debug exception must be always enabled. To achieve this we set MSR_DE and also set MSRP_DEP so guest cannot change MSR_DE. When emulating debug resource for guest we want guest to control MSR_DE (enable/disable debug interrupt on need). So above mentioned two configuration cannot be supported at the same time. So the result is that we cannot share debug resources between QEMU and Guest on BOOKE architecture. In the current design QEMU gets priority over guest, this means that if QEMU is using debug resources then guest cannot use them and if guest is using debug resource then QEMU can overwrite them. Signed-off-by: Bharat Bhushan <Bharat.Bhushan@freescale.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2014-09-22KVM: PPC: Move ONE_REG AltiVec support to powerpcMihai Caraman
Move ONE_REG AltiVec support to powerpc generic layer. Signed-off-by: Mihai Caraman <mihai.caraman@freescale.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2014-09-22KVM: PPC: Make ONE_REG powerpc genericMihai Caraman
Make ONE_REG generic for server and embedded architectures by moving kvm_vcpu_ioctl_get_one_reg() and kvm_vcpu_ioctl_set_one_reg() functions to powerpc layer. Signed-off-by: Mihai Caraman <mihai.caraman@freescale.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2014-09-22KVM: PPC: Book3e: Add AltiVec supportMihai Caraman
Add AltiVec support in KVM for Book3e. FPU support gracefully reuse host infrastructure so follow the same approach for AltiVec. Book3e specification defines shared interrupt numbers for SPE and AltiVec units. Still SPE is present in e200/e500v2 cores while AltiVec is present in e6500 core. So we can currently decide at compile-time which of the SPE or AltiVec units to support exclusively by using CONFIG_SPE_POSSIBLE and CONFIG_PPC_E500MC defines. As Alexander Graf suggested, keep SPE and AltiVec exception handlers distinct to improve code readability. Guests have the privilege to enable AltiVec, so we always need to support AltiVec in KVM and implicitly in host to reflect interrupts and to save/restore the unit context. KVM will be loaded on cores with AltiVec unit only if CONFIG_ALTIVEC is defined. Use this define to guard KVM AltiVec logic. Signed-off-by: Mihai Caraman <mihai.caraman@freescale.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2014-09-22KVM: PPC: Book3E: Increase FPU lazinessMihai Caraman
Increase FPU laziness by loading the guest state into the unit before entering the guest instead of doing it on each vcpu schedule. Without this improvement an interrupt may claim floating point corrupting guest state. Signed-off-by: Mihai Caraman <mihai.caraman@freescale.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2014-09-22KVM: PPC: Book3S HV: Add register name when loading tocMichael Neuling
Add 'r' to register name r2 in kvmppc_hv_enter. Also update comment at the top of kvmppc_hv_enter to indicate that R2/TOC is non-volatile. Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Alexander Graf <agraf@suse.de>
2014-09-22powerpc/booke: Revert SPE/AltiVec common defines for interrupt numbersMihai Caraman
Book3E specification defines shared interrupt numbers for SPE and AltiVec units. Still SPE is present in e200/e500v2 cores while AltiVec is present in e6500 core. So we can currently decide at compile-time which unit to support exclusively. As Alexander Graf suggested, this will improve code readability especially in KVM. Use distinct defines to identify SPE/AltiVec interrupt numbers, reverting c58ce397 and 6b310fc5 patches that added common defines. Signed-off-by: Mihai Caraman <mihai.caraman@freescale.com> Acked-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2014-09-22powerpc/booke: Restrict SPE exception handlers to e200/e500 coresMihai Caraman
SPE exception handlers are now defined for 32-bit e500mc cores even though SPE unit is not present and CONFIG_SPE is undefined. Restrict SPE exception handlers to e200/e500 cores adding CONFIG_SPE_POSSIBLE and consequently guard __stup_ivors and __setup_cpu functions. Signed-off-by: Mihai Caraman <mihai.caraman@freescale.com> Acked-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2014-09-22KVM: PPC: BOOKE: Add one reg interface for DBSRBharat Bhushan
Signed-off-by: Bharat Bhushan <Bharat.Bhushan@freescale.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2014-09-22KVM: PPC: BOOKE: Guest and hardware visible debug registers are sameBharat Bhushan
Guest visible debug register and hardware visible debug registers are same, so ther is no need to have arch->shadow_dbg_reg, instead use arch->dbg_reg. Signed-off-by: Bharat Bhushan <Bharat.Bhushan@freescale.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2014-09-22KVM: PPC: BOOKE: Clear guest dbsr in userspace exit KVM_EXIT_DEBUGBharat Bhushan
Dbsr is not visible to userspace and we do not think any need to expose this to userspace because: Userspace cannot inject debug interrupt to guest (as this does not know guest ability to handle debug interrupt), so userspace will always clear DBSR. Now if userspace has to always clear DBSR in KVM_EXIT_DEBUG handling then clearing dbsr in kernel looks simple as this avoid doing SET_SREGS/set_one_reg() to clear DBSR Signed-off-by: Bharat Bhushan <Bharat.Bhushan@freescale.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2014-09-22KVM: PPC: BOOKE: Allow guest to change MSR_DEBharat Bhushan
This patch changes the default behavior of MSRP_DEP, that is guest is not allowed to change the MSR_DE, to guest can change MSR_DE. When userspace is debugging guest then it override the default behavior and set MSRP_DEP. This stops guest to change MSR_DE when userspace is debugging guest. Signed-off-by: Bharat Bhushan <Bharat.Bhushan@freescale.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2014-09-22KVM: PPC: BOOKE : Emulate rfdi instructionBharat Bhushan
This patch adds "rfdi" instruction emulation which is required for guest debug hander on BOOKE-HV Signed-off-by: Bharat Bhushan <Bharat.Bhushan@freescale.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2014-09-22KVM: PPC: BOOKE: allow debug interrupt at "debug level"Bharat Bhushan
Debug interrupt can be either "critical level" or "debug level". There are separate set of save/restore registers used for different level. Example: DSRR0/DSRR1 are used for "debug level" and CSRR0/CSRR1 are used for critical level debug interrupt. Using CPU_FTR_DEBUG_LVL_EXC to decide which interrupt level to be used. Signed-off-by: Bharat Bhushan <Bharat.Bhushan@freescale.com> Signed-off-by: Alexander Graf <agraf@suse.de>
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