diff options
| author | Hu Huajun <huhuajun@huawei.com> | 2017-06-12 22:37:48 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-07-21 06:59:07 +0200 |
| commit | 233b62de810ef0c360ed530e100eebd3c50042e4 (patch) | |
| tree | c85f2a8df624cebf4573f48d51c959b73af96871 /virt | |
| parent | 20df36575fd2f51fc0465ebd1f5bc97da05a62e9 (diff) | |
KVM: ARM64: fix phy counter access failure in guest.
commit 02d50cdaff36c135d222015cffdca3ff11d168ea upstream.
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")
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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 3417e184c8e1..a43012587fcc 100644 --- a/virt/kvm/arm/arm.c +++ b/virt/kvm/arm/arm.c @@ -1115,9 +1115,6 @@ 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(); } @@ -1137,6 +1134,7 @@ 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); } |