Allow entry to a vcpu that can handle interrupts if there is an interrupts pending. Entry will still be aborted if the vcpu cannot handle interrupts.
This allows use of __guest_enter to enter into the host. Signed-off-by: Andrew Scull <[email protected]> --- arch/arm64/kvm/hyp/entry.S | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/arch/arm64/kvm/hyp/entry.S b/arch/arm64/kvm/hyp/entry.S index ee32a7743389..6a641fcff4f7 100644 --- a/arch/arm64/kvm/hyp/entry.S +++ b/arch/arm64/kvm/hyp/entry.S @@ -73,13 +73,17 @@ SYM_FUNC_START(__guest_enter) save_sp_el0 x1, x2 // Now the host state is stored if we have a pending RAS SError it must - // affect the host. If any asynchronous exception is pending we defer - // the guest entry. The DSB isn't necessary before v8.2 as any SError - // would be fatal. + // affect the host. If physical IRQ interrupts are going to be trapped + // and there are already asynchronous exceptions pending then we defer + // the entry. The DSB isn't necessary before v8.2 as any SError would + // be fatal. alternative_if ARM64_HAS_RAS_EXTN dsb nshst isb alternative_else_nop_endif + mrs x1, hcr_el2 + and x1, x1, #HCR_IMO + cbz x1, 1f mrs x1, isr_el1 cbz x1, 1f mov x0, #ARM_EXCEPTION_IRQ -- 2.27.0.389.gc38d7665816-goog _______________________________________________ kvmarm mailing list [email protected] https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
