[PATCH v5 31/36] KVM: arm64: gic-v5: Set ICH_VCTLR_EL2.En on boot

Sascha Bischoff
2026-02-26T16:04:38Z

This control enables virtual HPPI selection, i.e., selection and
delivery of interrupts for a guest (assuming that the guest itself has
opted to receive interrupts). This is set to enabled on boot as there
is no reason for disabling it in normal operation as virtual interrupt
signalling itself is still controlled via the HCR_EL2.

Signed-off-by: Sascha Bischoff <sascha.bischoff@arm.com>
---
arch/arm64/include/asm/el2_setup.h | 2 ++
1 file changed, 2 insertions(+)

diff --git a/arch/arm64/include/asm/el2_setup.h b/arch/arm64/include/asm/el2_setup.h
index 85f4c1615472d..998b2a3f615a7 100644
--- a/arch/arm64/include/asm/el2_setup.h
+++ b/arch/arm64/include/asm/el2_setup.h
@@ -248,6 +248,8 @@
ICH_HFGWTR_EL2_ICC_CR0_EL1 | \
ICH_HFGWTR_EL2_ICC_APR_EL1)
msr_s SYS_ICH_HFGWTR_EL2, x0 // Disable reg write traps
+ mov x0, #(ICH_VCTLR_EL2_En)
+ msr_s SYS_ICH_VCTLR_EL2, x0 // Enable vHPPI selection
.Lskip_gicv5_\@:
.endm

--
2.34.1