From: Marc Zyngier <marc.zyngier@xxxxxxx> Another missing stub hypercall is HVC_SOFT_RESTART. It turns out that it is pretty easy to implement in terms of HVC_RESET_VECTORS (since it needs to turn the MMU off). Tested-by: Keerthy <j-keerthy@xxxxxx> Acked-by: Russell King <rmk+kernel@xxxxxxxxxxxxxxx> Acked-by: Catalin Marinas <catalin.marinas@xxxxxxx> Signed-off-by: Marc Zyngier <marc.zyngier@xxxxxxx> Signed-off-by: Christoffer Dall <cdall@xxxxxxxxxx> --- arch/arm/kvm/init.S | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/arch/arm/kvm/init.S b/arch/arm/kvm/init.S index fb33609..e53360d 100644 --- a/arch/arm/kvm/init.S +++ b/arch/arm/kvm/init.S @@ -127,8 +127,22 @@ ENTRY(__kvm_handle_stub_hvc) mrc p15, 4, r0, c12, c0, 0 @ get HVBAR b exit +1: cmp r0, #HVC_SOFT_RESTART + bne 1f + + /* The target is expected in r1 */ + msr ELR_hyp, r1 + mrs r0, cpsr + bic r0, r0, #MODE_MASK + orr r0, r0, #HYP_MODE +THUMB( orr r0, r0, #PSR_T_BIT ) + msr spsr_cxsf, r0 + b reset + 1: cmp r0, #HVC_RESET_VECTORS bne 1f + +reset: /* We're now in idmap, disable MMU */ mrc p15, 4, r1, c1, c0, 0 @ HSCTLR ldr r0, =(HSCTLR_M | HSCTLR_A | HSCTLR_C | HSCTLR_I) -- 2.9.0
