From: Peter Dinda <pdinda@northwestern.edu>
Date: Thu, 18 Jun 2015 21:59:05 +0000 (-0500)
Subject: Guest mem gpa/gva memset functions
X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?p=palacios.git;a=commitdiff_plain;h=31281ec866f7244baf965402aebc8e26046b43e0

Guest mem gpa/gva memset functions
---

diff --git a/palacios/include/palacios/vm_guest_mem.h b/palacios/include/palacios/vm_guest_mem.h
index 7c0dbcf..fb98f69 100644
--- a/palacios/include/palacios/vm_guest_mem.h
+++ b/palacios/include/palacios/vm_guest_mem.h
@@ -109,6 +109,8 @@ int v3_read_gva_memory(struct guest_info * guest_info, addr_t guest_va, int coun
 int v3_read_gpa_memory(struct guest_info * guest_info, addr_t guest_pa, int count, uint8_t * dest);
 int v3_write_gpa_memory(struct guest_info * guest_info, addr_t guest_pa, int count, uint8_t * src);
 int v3_write_gva_memory(struct guest_info * guest_info, addr_t guest_va, int count, uint8_t * src);
+int v3_set_gpa_memory(struct guest_info * guest_info, addr_t guest_pa, int count, uint8_t src);
+int v3_set_gva_memory(struct guest_info * guest_info, addr_t guest_va, int count, uint8_t src);
 
 
 #endif // ! __V3VEE__
diff --git a/palacios/src/palacios/vm_guest_mem.c b/palacios/src/palacios/vm_guest_mem.c
index e2729b9..9c7703e 100644
--- a/palacios/src/palacios/vm_guest_mem.c
+++ b/palacios/src/palacios/vm_guest_mem.c
@@ -430,6 +430,37 @@ int v3_write_gva_memory(struct guest_info * guest_info, addr_t gva, int count, u
     return bytes_written;
 }
 
+int v3_set_gva_memory(struct guest_info * guest_info, addr_t gva, int count, uchar_t src) {
+    addr_t cursor = gva;
+    int bytes_written = 0;
+
+
+
+    while (count > 0) {
+	int dist_to_pg_edge = (PAGE_ADDR(cursor) + PAGE_SIZE) - cursor;
+	int bytes_to_copy = (dist_to_pg_edge > count) ? count : dist_to_pg_edge;
+	addr_t host_addr = 0;
+
+    
+	if (v3_gva_to_hva(guest_info, cursor, &host_addr) != 0) {
+	    PrintDebug(guest_info->vm_info, guest_info, "Invalid GVA(%p)->HVA lookup\n", (void *)cursor);
+	    return bytes_written;
+	}
+    
+    
+
+	memset((void*)host_addr,
+	       src,
+	       bytes_to_copy);
+    
+	bytes_written += bytes_to_copy;
+	count -= bytes_to_copy;
+	cursor += bytes_to_copy;    
+    }
+
+    return bytes_written;
+}
+
 
 
 
@@ -460,3 +491,28 @@ int v3_write_gpa_memory(struct guest_info * guest_info, addr_t gpa, int count, u
     return bytes_written;
 }
 
+
+int v3_set_gpa_memory(struct guest_info * guest_info, addr_t gpa, int count, uchar_t src) {
+    addr_t cursor = gpa;
+    int bytes_written = 0;
+
+    while (count > 0) {
+	int dist_to_pg_edge = (PAGE_ADDR(cursor) + PAGE_SIZE) - cursor;
+	int bytes_to_copy = (dist_to_pg_edge > count) ? count : dist_to_pg_edge;
+	addr_t host_addr;
+
+	if (v3_gpa_to_hva(guest_info, cursor, &host_addr) != 0) {
+	    return bytes_written;
+	}
+
+
+	memset((void*)host_addr, src, bytes_to_copy);
+
+	bytes_written += bytes_to_copy;
+	count -= bytes_to_copy;
+	cursor += bytes_to_copy;    
+    }
+
+    return bytes_written;
+}
+