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qemu/target/ppc
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Joel Stanley 6b37554458 target/ppc: Allow privileged access to SPR_PCR 
The powerpc Linux kernel[1] and skiboot firmware[2] recently gained changes
that cause the Processor Compatibility Register (PCR) SPR to be cleared.

These changes cause Linux to fail to boot on the Qemu powernv machine
with an error:

 Trying to write privileged spr 338 (0x152) at 0000000030017f0c

With this patch Qemu makes this register available as a hypervisor
privileged register.

Note that bits set in this register disable features of the processor.
Currently the only register state that is supported is when the register
is zeroed (enable all features). This is sufficient for guests to
once again boot.

[1] https://lkml.kernel.org/r/20180518013742.24095-1-mikey@neuling.org
[2] https://patchwork.ozlabs.org/patch/915932/

Signed-off-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
2018-06-12 09:33:52 +10:00
..
translate target/ppc: convert to DisasContextBase 2018-02-16 12:14:39 +11:00
arch_dump.c exec,dump,i386,ppc,s390x: don't include exec/cpu-all.h explicitly 2017-09-19 18:21:33 +02:00
compat.c target/ppc: Clarify compat mode max_threads value 2018-01-17 09:35:24 +11:00
cpu-models.c target/ppc: Add POWER9 DD2.0 model information 2017-10-17 10:34:00 +11:00
cpu-models.h target/ppc: Add POWER9 DD2.0 model information 2017-10-17 10:34:00 +11:00
cpu-qom.h target/ppc: Get rid of POWERPC_MMU_VER() macros 2018-04-27 18:05:22 +10:00
cpu.c target/ppc: support for 32-bit carry and overflow 2017-03-01 11:23:39 +11:00
cpu.h ppc: Rename 2.13 machines to 3.0 2018-05-29 11:28:46 +01:00
dfp_helper.c Move target-* CPU file into a target/ folder 2016-12-20 21:52:12 +01:00
excp_helper.c target/ppc: add support for hypervisor doorbells on book3s CPUs 2018-01-20 17:15:05 +11:00
fpu_helper.c fpu/softfloat: Specialize on snan_bit_is_one 2018-05-17 15:27:15 -07:00
gdbstub.c ppc: Fix size of ppc64 xer register 2018-04-27 18:05:22 +10:00
helper.h target/ppc: Allow privileged access to SPR_PCR 2018-06-12 09:33:52 +10:00
helper_regs.h target/ppc: Include "exec/exec-all.h" which provides tlb_flush() 2018-05-31 19:12:13 +02:00
int_helper.c target: Do not include "exec/exec-all.h" if it is not necessary 2018-06-01 14:15:10 +02:00
internal.h target-ppc: implement load atomic instruction 2017-02-22 11:28:27 +11:00
kvm-stub.c openpic: move KVM-specific declarations into separate openpic_kvm.h file 2018-03-06 13:16:29 +11:00
kvm.c target/ppc: Factor out the parsing in kvmppc_get_cpu_characteristics() 2018-06-12 09:33:52 +10:00
kvm_ppc.h spapr: Remove support for explicitly allocated RMAs 2018-05-04 11:15:18 +10:00
machine.c ppc: Rename 2.13 machines to 3.0 2018-05-29 11:28:46 +01:00
Makefile.objs build: remove CONFIG_LIBDECNUMBER 2017-10-16 18:03:52 +02:00
mem_helper.c ppc: use DIV_ROUND_UP 2017-08-31 12:29:07 +02:00
mfrom_table.inc.c rename included C files to foo.inc.c, remove osdep.h 2018-05-11 14:33:40 +02:00
mfrom_table_gen.c Move target-* CPU file into a target/ folder 2016-12-20 21:52:12 +01:00
misc_helper.c target/ppc: Allow privileged access to SPR_PCR 2018-06-12 09:33:52 +10:00
mmu-book3s-v3.c Include qapi/error.h exactly where needed 2018-02-09 13:50:17 +01:00
mmu-book3s-v3.h target/ppc: add basic support for PTCR on POWER9 2018-05-04 09:56:27 +10:00
mmu-hash32.c target/ppc: Eliminate htab_base and htab_mask variables 2017-03-01 11:23:39 +11:00
mmu-hash32.h target/ppc: Manage external HPT via virtual hypervisor 2017-03-01 11:23:39 +11:00
mmu-hash64.c Make address_space_map() take a MemTxAttrs argument 2018-05-31 16:32:35 +01:00
mmu-hash64.h target/ppc: Add ppc_store_lpcr() helper 2018-05-04 11:15:19 +10:00
mmu-radix64.c Include qapi/error.h exactly where needed 2018-02-09 13:50:17 +01:00
mmu-radix64.h target/ppc: Add debug function for radix mmu translation 2017-07-11 11:04:02 +10:00
mmu_helper.c target/ppc: add basic support for PTCR on POWER9 2018-05-04 09:56:27 +10:00
monitor.c Use qemu_tolower() and qemu_toupper(), not tolower() and toupper() 2017-07-21 10:32:41 +01:00
timebase_helper.c Move target-* CPU file into a target/ folder 2016-12-20 21:52:12 +01:00
trace-events docs: fix broken paths to docs/devel/tracing.txt 2017-07-31 13:12:53 +03:00
translate.c target/ppc: Use proper logging function for possible guest errors 2018-06-12 09:33:52 +10:00
translate_init.inc.c target/ppc: Allow privileged access to SPR_PCR 2018-06-12 09:33:52 +10:00
user_only_helper.c accel/tcg: add size paremeter in tlb_fill() 2018-01-25 16:02:24 +01:00