Commit 233b62de authored by Hu Huajun's avatar Hu Huajun Committed by Greg Kroah-Hartman

KVM: ARM64: fix phy counter access failure in guest.

commit 02d50cda 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: 488f94d7 ("KVM: arm64: Access CNTHCTL_EL2 bit fields correctly on VHE systems")
Signed-off-by: default avatarHu Huajun <huhuajun@huawei.com>
Reviewed-by: default avatarChristoffer Dall <cdall@linaro.org>
Acked-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
Signed-off-by: default avatarChristoffer Dall <cdall@linaro.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 20df3657
......@@ -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);
}
......
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