qemu/target
Greg Kurz 5dfaa532e0 ppc: fix ppc_set_compat() with KVM PR
When running in KVM PR mode, kvmppc_set_compat() always fail because the
current PR implementation doesn't handle KVM_REG_PPC_ARCH_COMPAT. Now that
the machine code inconditionally calls ppc_set_compat_all() at reset time
to restore the compat mode default value (commit 66d5c492dd), it is
impossible to start a guest with PR:

qemu-system-ppc64: Unable to set CPU compatibility mode in KVM:
 Invalid argument

A tentative patch [1] was recently sent by Suraj to address the issue, but
it would prevent the compat mode to be turned off on reset. And we really
don't want to explicitely check for KVM PR. During the patch's review,
David suggested that we should only call the KVM ioctl() if the compat
PVR changes. This allows at least to run with KVM PR, provided no compat
mode is requested from the command line (which should be the case when
running PR nested). This is what this patch does.

While here, we also fix the side effect where KVM would fail but we would
change the CPU state in QEMU anyway.

[1] http://patchwork.ozlabs.org/patch/782039/

Signed-off-by: Greg Kurz <groug@kaod.org>
Reviewed-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
2017-08-22 21:26:46 +10:00
..
alpha tcg: Pass generic CPUState to gen_intermediate_code() 2017-07-19 14:45:16 -07:00
arm target/arm: Require alignment for load exclusive 2017-08-15 17:38:44 +01:00
cris tcg: Pass generic CPUState to gen_intermediate_code() 2017-07-19 14:45:16 -07:00
hppa tcg: Pass generic CPUState to gen_intermediate_code() 2017-07-19 14:45:16 -07:00
i386 target/i386: set rip_offset for some SSE4.1 instructions 2017-08-08 10:40:20 +02:00
lm32 tcg: Pass generic CPUState to gen_intermediate_code() 2017-07-19 14:45:16 -07:00
m68k m68k/translate: fix incorrect copy/paste 2017-07-31 13:06:39 +03:00
microblaze tcg: Pass generic CPUState to gen_intermediate_code() 2017-07-19 14:45:16 -07:00
mips target/mips: Fix RDHWR CC with icount 2017-08-02 22:18:13 +01:00
moxie tcg: Pass generic CPUState to gen_intermediate_code() 2017-07-19 14:45:16 -07:00
nios2 tcg: Pass generic CPUState to gen_intermediate_code() 2017-07-19 14:45:16 -07:00
openrisc tcg: Pass generic CPUState to gen_intermediate_code() 2017-07-19 14:45:16 -07:00
ppc ppc: fix ppc_set_compat() with KVM PR 2017-08-22 21:26:46 +10:00
s390x target/s390x: Fix CSST for 16-byte store 2017-08-03 10:58:50 -07:00
sh4 tcg: Pass generic CPUState to gen_intermediate_code() 2017-07-19 14:45:16 -07:00
sparc trace-events: fix code style: print 0x before hex numbers 2017-08-01 12:13:07 +01:00
tilegx tcg: Pass generic CPUState to gen_intermediate_code() 2017-07-19 14:45:16 -07:00
tricore qemu-system-tricore: segfault when entering "x 0" on the monitor 2017-07-31 13:06:38 +03:00
unicore32 unicore32: abort when entering "x 0" on the monitor 2017-08-14 13:06:54 +03:00
xtensa tcg: Pass generic CPUState to gen_intermediate_code() 2017-07-19 14:45:16 -07:00