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kvm: Set more fields in boot protocol

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Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
This commit is contained in:
Cyrill Gorcunov
2015-06-01 16:39:39 +01:00
committed by Will Deacon
parent 58547c303a
commit a43f6460f4
1 changed files with 23 additions and 4 deletions
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kvm.c
+23 -4
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@@ -179,6 +179,7 @@ void kvm__enable_singlestep(struct kvm *self)
#define BOOT_CMDLINE_OFFSET 0x20000
#define BOOT_PROTOCOL_REQUIRED 0x202
#define LOAD_HIGH 0x01
static int load_flat_binary(struct kvm *self, int fd)
{
@@ -257,19 +258,37 @@ static bool load_bzimage(struct kvm *self, int fd, const char *kernel_cmdline)
while ((nr = read(fd, p, 65536)) > 0)
p += nr;
p = guest_flat_to_host(self, BOOT_CMDLINE_OFFSET);
if (kernel_cmdline) {
cmdline_size = strlen(kernel_cmdline) + 1;
if (cmdline_size > boot.hdr.cmdline_size)
cmdline_size = boot.hdr.cmdline_size;
p = guest_flat_to_host(self, BOOT_CMDLINE_OFFSET);
memset(p, 0, boot.hdr.cmdline_size);
memcpy(p, kernel_cmdline, cmdline_size - 1);
p = guest_real_to_host(self, BOOT_LOADER_SELECTOR, 0x228);
*(uint32_t *)p = BOOT_CMDLINE_OFFSET;
}
#define hdr_offset(member) \
offsetof(struct boot_params, hdr) + \
offsetof(struct setup_header, member)
#define guest_hdr(kvm, member) \
guest_real_to_host(kvm, \
BOOT_LOADER_SELECTOR, \
hdr_offset(member))
/* some fields in guest header have to be updated */
p = guest_hdr(self, cmd_line_ptr);
*(uint32_t *)p = BOOT_CMDLINE_OFFSET;
p = guest_hdr(self, type_of_loader);
*(uint8_t *)p = 0xff;
p = guest_hdr(self, heap_end_ptr);
*(uint16_t *)p = 0xfe00;
p = guest_hdr(self, loadflags);
*(uint8_t *)p |= CAN_USE_HEAP;
self->boot_selector = BOOT_LOADER_SELECTOR;
/*
* The real-mode setup code starts at offset 0x200 of a bzImage. See