[PATCH 2/5 V2] kvm tools: Add video mode to kernel initialization

[Sasha Levin <levinsasha928@gmail.com>]

Allow setting video mode in guest kernel.

For possible values see Documentation/fb/vesafb.txt

Signed-off-by: John Floren <john@jfloren.net>
[ turning code into patches and cleanup ]
Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
---
 tools/kvm/include/kvm/kvm.h |    2 +-
 tools/kvm/kvm.c             |    7 ++++---
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/tools/kvm/include/kvm/kvm.h b/tools/kvm/include/kvm/kvm.h
index 08c6fda..f951f2d 100644
--- a/tools/kvm/include/kvm/kvm.h
+++ b/tools/kvm/include/kvm/kvm.h
@@ -41,7 +41,7 @@ int kvm__max_cpus(struct kvm *kvm);
 void kvm__init_ram(struct kvm *kvm);
 void kvm__delete(struct kvm *kvm);
 bool kvm__load_kernel(struct kvm *kvm, const char *kernel_filename,
-			const char *initrd_filename, const char *kernel_cmdline);
+			const char *initrd_filename, const char *kernel_cmdline, u16 vidmode);
 void kvm__setup_bios(struct kvm *kvm);
 void kvm__start_timer(struct kvm *kvm);
 void kvm__stop_timer(struct kvm *kvm);
diff --git a/tools/kvm/kvm.c b/tools/kvm/kvm.c
index 4393a41..7284211 100644
--- a/tools/kvm/kvm.c
+++ b/tools/kvm/kvm.c
@@ -320,7 +320,7 @@ static int load_flat_binary(struct kvm *kvm, int fd)
 static const char *BZIMAGE_MAGIC	= "HdrS";
 
 static bool load_bzimage(struct kvm *kvm, int fd_kernel,
-			int fd_initrd, const char *kernel_cmdline)
+			int fd_initrd, const char *kernel_cmdline, u16 vidmode)
 {
 	struct boot_params *kern_boot;
 	unsigned long setup_sects;
@@ -383,6 +383,7 @@ static bool load_bzimage(struct kvm *kvm, int fd_kernel,
 	kern_boot->hdr.type_of_loader	= 0xff;
 	kern_boot->hdr.heap_end_ptr	= 0xfe00;
 	kern_boot->hdr.loadflags	|= CAN_USE_HEAP;
+	kern_boot->hdr.vid_mode		= vidmode;
 
 	/*
 	 * Read initrd image into guest memory
@@ -441,7 +442,7 @@ static bool initrd_check(int fd)
 }
 
 bool kvm__load_kernel(struct kvm *kvm, const char *kernel_filename,
-		const char *initrd_filename, const char *kernel_cmdline)
+		const char *initrd_filename, const char *kernel_cmdline, u16 vidmode)
 {
 	bool ret;
 	int fd_kernel = -1, fd_initrd = -1;
@@ -459,7 +460,7 @@ bool kvm__load_kernel(struct kvm *kvm, const char *kernel_filename,
 			die("%s is not an initrd", initrd_filename);
 	}
 
-	ret = load_bzimage(kvm, fd_kernel, fd_initrd, kernel_cmdline);
+	ret = load_bzimage(kvm, fd_kernel, fd_initrd, kernel_cmdline, vidmode);
 
 	if (initrd_filename)
 		close(fd_initrd);
-- 
1.7.5.rc3