Subject: [PATCH v1 09/24] kvm: arm64: Refactor handle_trap to use a switch

From: David Brazdil <[email-masked]>
Date: Mon, 9 Nov 2020 11:32:18 +0000

Small refactor so that nVHE's handle_trap uses a switch on the Exception
Class value of ESR_EL2 in preparation for adding a handler of SMC32/64.

Signed-off-by: David Brazdil <[email-masked]>
---
 arch/arm64/kvm/hyp/nvhe/hyp-main.c | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/arch/arm64/kvm/hyp/nvhe/hyp-main.c b/arch/arm64/kvm/hyp/nvhe/hyp-main.c
index 411b0f652417..19332c20fcde 100644
--- a/arch/arm64/kvm/hyp/nvhe/hyp-main.c
+++ b/arch/arm64/kvm/hyp/nvhe/hyp-main.c
@@ -16,9 +16,9 @@
 
 DEFINE_PER_CPU(struct kvm_nvhe_init_params, kvm_init_params);
 
-static void handle_host_hcall(unsigned long func_id,
-			      struct kvm_cpu_context *host_ctxt)
+static void handle_host_hcall(struct kvm_cpu_context *host_ctxt)
 {
+	unsigned long func_id = host_ctxt->regs.regs[0];
 	unsigned long ret = 0;
 
 	switch (func_id) {
@@ -109,11 +109,12 @@ static void handle_host_hcall(unsigned long func_id,
 void handle_trap(struct kvm_cpu_context *host_ctxt)
 {
 	u64 esr = read_sysreg_el2(SYS_ESR);
-	unsigned long func_id;
 
-	if (ESR_ELx_EC(esr) != ESR_ELx_EC_HVC64)
+	switch (ESR_ELx_EC(esr)) {
+	case ESR_ELx_EC_HVC64:
+		handle_host_hcall(host_ctxt);
+		break;
+	default:
 		hyp_panic();
-
-	func_id = host_ctxt->regs.regs[0];
-	handle_host_hcall(func_id, host_ctxt);
+	}
 }
-- 
2.29.2.222.g5d2a92d10f8-goog

_______________________________________________
linux-arm-kernel mailing list
[email-masked]
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel