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| author | Hu Huajun <huhuajun@huawei.com> | 2017-06-12 22:37:48 +0800 |
|---|---|---|
| committer | Marc Zyngier <marc.zyngier@arm.com> | 2017-06-15 09:45:12 +0100 |
| commit | 02d50cdaff36c135d222015cffdca3ff11d168ea (patch) | |
| tree | d1fb76c8696dbb25b06537167e6eac19f7ade8ec /virt | |
| parent | 0959db6c0b069739ffedf3f6b97644213df586d4 (diff) | |
| download | linux-02d50cdaff36c135d222015cffdca3ff11d168ea.tar.bz2 | |
KVM: ARM64: fix phy counter access failure in guest.
When reading the cntpct_el0 in guest with VHE (Virtual Host Extension)
enabled in host, the "Unsupported guest sys_reg access" error reported.
The reason is cnthctl_el2.EL1PCTEN is not enabled, which is expected
to be done in kvm_timer_init_vhe(). The problem is kvm_timer_init_vhe
is called by cpu_init_hyp_mode, and which is called when VHE is disabled.
This patch remove the incorrect call to kvm_timer_init_vhe() from
cpu_init_hyp_mode(), and calls kvm_timer_init_vhe() to enable
cnthctl_el2.EL1PCTEN in cpu_hyp_reinit().
Fixes: 488f94d7212b ("KVM: arm64: Access CNTHCTL_EL2 bit fields correctly on VHE systems")
Cc: stable@vger.kernel.org
Signed-off-by: Hu Huajun <huhuajun@huawei.com>
Reviewed-by: Christoffer Dall <cdall@linaro.org>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <cdall@linaro.org>
Diffstat (limited to 'virt')
| -rw-r--r-- | virt/kvm/arm/arm.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/virt/kvm/arm/arm.c b/virt/kvm/arm/arm.c index a265acc53e39..a39a1e161e63 100644 --- a/virt/kvm/arm/arm.c +++ b/virt/kvm/arm/arm.c @@ -1141,9 +1141,6 @@ static void cpu_init_hyp_mode(void *dummy) __cpu_init_hyp_mode(pgd_ptr, hyp_stack_ptr, vector_ptr); __cpu_init_stage2(); - if (is_kernel_in_hyp_mode()) - kvm_timer_init_vhe(); - kvm_arm_init_debug(); } @@ -1163,6 +1160,7 @@ static void cpu_hyp_reinit(void) * event was cancelled before the CPU was reset. */ __cpu_init_stage2(); + kvm_timer_init_vhe(); } else { cpu_init_hyp_mode(NULL); } |