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[07/14] MIPS: KVM: Add dumping of generated entry code

Message ID 1466699687-24791-8-git-send-email-james.hogan@imgtec.com (mailing list archive)
State New, archived
Headers show

Commit Message

James Hogan June 23, 2016, 4:34 p.m. UTC 
Dump the generated entry code with pr_debug(), similar to how it is done
in tlbex.c, so it can be more easily debugged.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org
---
 arch/mips/kvm/mips.c | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)
diff mbox

Patch

diff --git a/arch/mips/kvm/mips.c b/arch/mips/kvm/mips.c
index f00cf5f9ac52..f809ad84196d 100644
--- a/arch/mips/kvm/mips.c
+++ b/arch/mips/kvm/mips.c
@@ -245,6 +245,23 @@  void kvm_arch_commit_memory_region(struct kvm *kvm,
 	}
 }
 
+static inline void dump_handler(const char *symbol, void *start, void *end)
+{
+	u32 *p;
+
+	pr_debug("LEAF(%s)\n", symbol);
+
+	pr_debug("\t.set push\n");
+	pr_debug("\t.set noreorder\n");
+
+	for (p = start; p < (u32 *)end; ++p)
+		pr_debug("\t.word\t0x%08x\t\t# %p\n", *p, p);
+
+	pr_debug("\t.set\tpop\n");
+
+	pr_debug("\tEND(%s)\n", symbol);
+}
+
 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
 {
 	int err, size;
@@ -309,6 +326,14 @@  struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
 	vcpu->arch.vcpu_run = p;
 	p = kvm_mips_build_vcpu_run(p);
 
+	/* Dump the generated code */
+	pr_debug("#include <asm/asm.h>\n");
+	pr_debug("#include <asm/regdef.h>\n");
+	pr_debug("\n");
+	dump_handler("kvm_vcpu_run", vcpu->arch.vcpu_run, p);
+	dump_handler("kvm_gen_exc", gebase + 0x180, gebase + 0x200);
+	dump_handler("kvm_exit", gebase + 0x2000, vcpu->arch.vcpu_run);
+
 	/* Invalidate the icache for these ranges */
 	local_flush_icache_range((unsigned long)gebase,
 				(unsigned long)gebase + ALIGN(size, PAGE_SIZE));