[patch 3/3] kvm test: long rmap chains

[Marcelo Tosatti <mtosatti@xxxxxxxxxx>]

test long rmap chains

Signed-off-by: Marcelo Tosatti <mtosatti@xxxxxxxxxx>

Index: qemu-kvm/kvm/test/config-x86-common.mak
===================================================================
--- qemu-kvm.orig/kvm/test/config-x86-common.mak
+++ qemu-kvm/kvm/test/config-x86-common.mak
@@ -65,6 +65,9 @@ $(TEST_DIR)/idt_test.flat: $(cstart.o) $
 
 $(TEST_DIR)/xsave.flat: $(cstart.o) $(TEST_DIR)/idt.o $(TEST_DIR)/xsave.o
 
+$(TEST_DIR)/rmap_chain.flat: $(cstart.o) $(TEST_DIR)/rmap_chain.o \
+			     $(TEST_DIR)/print.o $(TEST_DIR)/vm.o
+
 arch_clean:
 	$(RM) $(TEST_DIR)/*.o $(TEST_DIR)/*.flat \
 	$(TEST_DIR)/.*.d $(TEST_DIR)/lib/.*.d $(TEST_DIR)/lib/*.o
Index: qemu-kvm/kvm/test/config-x86_64.mak
===================================================================
--- qemu-kvm.orig/kvm/test/config-x86_64.mak
+++ qemu-kvm/kvm/test/config-x86_64.mak
@@ -6,6 +6,6 @@ CFLAGS += -D__x86_64__
 
 tests = $(TEST_DIR)/access.flat $(TEST_DIR)/apic.flat \
 	  $(TEST_DIR)/emulator.flat $(TEST_DIR)/idt_test.flat \
-	  $(TEST_DIR)/xsave.flat
+	  $(TEST_DIR)/xsave.flat $(TEST_DIR)/rmap_chain.flat
 
 include config-x86-common.mak
Index: qemu-kvm/kvm/test/x86/rmap_chain.c
===================================================================
--- /dev/null
+++ qemu-kvm/kvm/test/x86/rmap_chain.c
@@ -0,0 +1,53 @@
+/* test long rmap chains */
+
+#include "libcflat.h"
+#include "vm.h"
+#include "smp.h"
+
+void print(const char *s);
+
+static unsigned int inl(unsigned short port)
+{
+    unsigned int val;
+    asm volatile ("inl %w1, %0":"=a" (val):"Nd" (port));
+    return val;
+}
+
+int main (void)
+{
+    int i;
+    int nr_pages;
+    void *target_page, *virt_addr;
+
+    setup_vm();
+
+    nr_pages = inl(0xd1) / PAGE_SIZE;
+    nr_pages -= 1000;
+    target_page = alloc_page();
+
+    virt_addr = (void *) 0xfffffa000;
+    for (i = 0; i < nr_pages; i++) {
+        install_page(phys_to_virt(read_cr3()), virt_to_phys(target_page),
+                     virt_addr);
+        virt_addr += PAGE_SIZE;
+    }
+    printf("created %d mappings\n", nr_pages);
+
+    virt_addr = (void *) 0xfffffa000;
+    for (i = 0; i < nr_pages; i++) {
+        unsigned long *touch = virt_addr;
+
+        *touch = 0;
+        virt_addr += PAGE_SIZE;
+    }
+    printf("instantiated mappings\n");
+
+    virt_addr += PAGE_SIZE;
+    install_pte(phys_to_virt(read_cr3()), 1, virt_addr,
+                0 | PTE_PRESENT | PTE_WRITE, target_page);
+
+    *(unsigned long *)virt_addr = 0;
+    printf("PASS\n");
+
+    return 0;
+}


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