[PATCH 22/28] KVM: arm64: Add routing for NVHCR_EL2 trap

[Marc Zyngier]

NVHCR_EL2 accesses from EL1 are taken to EL2 when HCRX_EL2.NVTGE==0
and HCR_EL2.NV==1. Describe this in the exception routing tables.

Signed-off-by: Marc Zyngier <maz at kernel.org>
---
 arch/arm64/kvm/emulate-nested.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/arch/arm64/kvm/emulate-nested.c b/arch/arm64/kvm/emulate-nested.c
index b7f3d86a94031..f5dc578d8c985 100644
--- a/arch/arm64/kvm/emulate-nested.c
+++ b/arch/arm64/kvm/emulate-nested.c
@@ -90,6 +90,7 @@ enum cgt_group_id {
 	CGT_HCRX_EnFPM,
 	CGT_HCRX_TCR2En,
 	CGT_HCRX_SCTLR2En,
+	CGT_HCRX_nNVTGE,
 
 	CGT_CNTHCTL_EL1TVT,
 	CGT_CNTHCTL_EL1TVCT,
@@ -121,6 +122,8 @@ enum cgt_group_id {
 	CGT_MDCR_TDE_TDRA,
 	CGT_MDCR_TDCC_TDE_TDA,
 
+	CGT_HCR_NV_HCRX_nNVTGE,
+
 	CGT_ICH_HCR_TC_TDIR,
 
 	/*
@@ -413,6 +416,12 @@ static const struct trap_bits coarse_trap_bits[] = {
 		.mask		= HCRX_EL2_SCTLR2En,
 		.behaviour	= BEHAVE_FORWARD_RW,
 	},
+	[CGT_HCRX_nNVTGE] = {
+		.index		= HCRX_EL2,
+		.value		= 0,
+		.mask		= HCRX_EL2_NVTGE,
+		.behaviour	= BEHAVE_FORWARD_RW,
+	},
 	[CGT_CNTHCTL_EL1TVT] = {
 		.index		= CNTHCTL_EL2,
 		.value		= CNTHCTL_EL1TVT,
@@ -468,6 +477,7 @@ static const enum cgt_group_id *coarse_control_combo[] = {
 					CGT_HCR_TVM, CGT_HCR_TRVM, CGT_HCRX_SCTLR2En),
 	MCB(CGT_HCR_TPU_TICAB,		CGT_HCR_TPU, CGT_HCR_TICAB),
 	MCB(CGT_HCR_TPU_TOCU,		CGT_HCR_TPU, CGT_HCR_TOCU),
+	MCB(CGT_HCR_NV_HCRX_nNVTGE,	CGT_HCR_NV, CGT_HCRX_nNVTGE),
 	MCB(CGT_HCR_NV1_nNV2_ENSCXT,	CGT_HCR_NV1_nNV2, CGT_HCR_ENSCXT),
 	MCB(CGT_MDCR_TPM_TPMCR,		CGT_MDCR_TPM, CGT_MDCR_TPMCR),
 	MCB(CGT_MDCR_TPM_HPMN,		CGT_MDCR_TPM, CGT_MDCR_HPMN),
@@ -853,6 +863,7 @@ static const struct encoding_to_trap_config encoding_to_cgt[] __initconst = {
 	SR_TRAP(SYS_SCTLR2_EL2,		CGT_HCR_NV),
 	SR_RANGE_TRAP(SYS_HCR_EL2,
 		      SYS_HCRX_EL2,	CGT_HCR_NV),
+	SR_TRAP(SYS_NVHCR_EL2,		CGT_HCR_NV_HCRX_nNVTGE),
 	SR_TRAP(SYS_SMPRIMAP_EL2,	CGT_HCR_NV),
 	SR_TRAP(SYS_SMCR_EL2,		CGT_HCR_NV),
 	SR_RANGE_TRAP(SYS_TTBR0_EL2,
-- 
2.47.3