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[3/4,v3] KVM: nSVM: Add assembly label to VMRUN instruction

Message ID 20210223191958.24218-4-krish.sadhukhan@oracle.com (mailing list archive)
State New, archived
Headers show
Series nSVM: Test host RFLAGS.TF on VMRUN | expand

Commit Message

Krish Sadhukhan Feb. 23, 2021, 7:19 p.m. UTC 
Add an assembly label to the VMRUN instruction so that its RIP can be known
to test cases. This will be used by the test in the next patch.

Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Krish Sadhukhan <krish.sadhukhan@oracle.com>
---
 x86/svm.c | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)
diff mbox series

Patch

diff --git a/x86/svm.c b/x86/svm.c
index a1808c7..77fba8b 100644
--- a/x86/svm.c
+++ b/x86/svm.c
@@ -208,14 +208,15 @@  struct regs get_regs(void)
 
 struct svm_test *v2_test;
 
-#define ASM_VMRUN_CMD                           \
+#define ASM_PRE_VMRUN_CMD                       \
                 "vmload %%rax\n\t"              \
                 "mov regs+0x80, %%r15\n\t"      \
                 "mov %%r15, 0x170(%%rax)\n\t"   \
                 "mov regs, %%r15\n\t"           \
                 "mov %%r15, 0x1f8(%%rax)\n\t"   \
                 LOAD_GPR_C                      \
-                "vmrun %%rax\n\t"               \
+
+#define ASM_POST_VMRUN_CMD                      \
                 SAVE_GPR_C                      \
                 "mov 0x170(%%rax), %%r15\n\t"   \
                 "mov %%r15, regs+0x80\n\t"      \
@@ -232,7 +233,9 @@  int svm_vmrun(void)
 	regs.rdi = (ulong)v2_test;
 
 	asm volatile (
-		ASM_VMRUN_CMD
+		ASM_PRE_VMRUN_CMD
+                "vmrun %%rax\n\t"               \
+		ASM_POST_VMRUN_CMD
 		:
 		: "a" (virt_to_phys(vmcb))
 		: "memory", "r15");
@@ -240,6 +243,8 @@  int svm_vmrun(void)
 	return (vmcb->control.exit_code);
 }
 
+extern void *vmrun_rip;
+
 static void test_run(struct svm_test *test)
 {
 	u64 vmcb_phys = virt_to_phys(vmcb);
@@ -258,7 +263,10 @@  static void test_run(struct svm_test *test)
 			"sti \n\t"
 			"call *%c[PREPARE_GIF_CLEAR](%[test]) \n \t"
 			"mov %[vmcb_phys], %%rax \n\t"
-			ASM_VMRUN_CMD
+			ASM_PRE_VMRUN_CMD
+			".global vmrun_rip\n\t"		\
+			"vmrun_rip: vmrun %%rax\n\t"    \
+			ASM_POST_VMRUN_CMD
 			"cli \n\t"
 			"stgi"
 			: // inputs clobbered by the guest: