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[RFC,10/26] kvm: arm64: Refactor handle_trap to use a switch

Message ID 20201104183630.27513-11-dbrazdil@google.com (mailing list archive)
State New, archived
Headers show
Series [RFC,01/26] psci: Export configured PSCI version | expand

Commit Message

David Brazdil Nov. 4, 2020, 6:36 p.m. UTC 
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 <dbrazdil@google.com>
---
 arch/arm64/kvm/hyp/nvhe/hyp-main.c | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)
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Patch

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);
+	}
 }