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| author | Wei Huang <wei@redhat.com> | 2017-06-02 11:51:47 +0100 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2017-06-02 11:51:47 +0100 |
| commit | 2b3ffa929249b15a75d8bde3e8e57a744f52aff0 (patch) | |
| tree | cb7eb3a0cfd78fd77a5d340ff68444d5b39a0476 | |
| parent | a89ff39ee9016613356677941d8f70be40e06cc3 (diff) | |
| download | qemu-2b3ffa929249b15a75d8bde3e8e57a744f52aff0.zip qemu-2b3ffa929249b15a75d8bde3e8e57a744f52aff0.tar.gz qemu-2b3ffa929249b15a75d8bde3e8e57a744f52aff0.tar.bz2 | |
target/arm: clear PMUVER field of AA64DFR0 when vPMU=off
The PMUv3 driver of linux kernel (in arch/arm64/kernel/perf_event.c)
relies on the PMUVER field of id_aa64dfr0_el1 to decide if PMU support
is present or not. This patch clears the PMUVER field under TCG mode
when vPMU=off. Without it, PMUv3 will init insider guest VMs even
with vPMU=off. This patch also removes a redundant line inside the
if-statement.
Signed-off-by: Wei Huang <wei@redhat.com>
Message-id: 1495123889-32301-1-git-send-email-wei@redhat.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
| -rw-r--r-- | target/arm/cpu.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/target/arm/cpu.c b/target/arm/cpu.c index c185eb1..4e8fe1c 100644 --- a/target/arm/cpu.c +++ b/target/arm/cpu.c @@ -750,8 +750,8 @@ static void arm_cpu_realizefn(DeviceState *dev, Error **errp) } if (!cpu->has_pmu) { - cpu->has_pmu = false; unset_feature(env, ARM_FEATURE_PMU); + cpu->id_aa64dfr0 &= ~0xf00; } if (!arm_feature(env, ARM_FEATURE_EL2)) { |