On 04/12/2011 09:32 AM, Stefan Berger wrote:
+
+static u32 add_tpm_device(void **tpm_addr, void **tcpa_addr)
+{
+ struct tcpa_descriptor_rev2 *tcpa;
+
+ *tpm_addr = NULL;
+ *tcpa_addr = NULL;
+
+ if (has_working_tpm()) {
+ u32 laml = 64 * 1024;
Kevin,
the above line prepares 64 kb to be allocated for an ACPI table. It
works fine if booting a VM from an image. However, when passing the
kernel, initrd and command line parameters to Qemu directly (-kernel,
-append, ..), the 64kb above seem to be too much -- I see errors in the
Linux kernel's dmesg when Linux tries to access the ACPI tables.
Lowering the above to 48kb (happens to) makes it work. I am wondering
whether something is copying into the ACPI area or what else may be the
reason - do you know?
+ *tpm_addr = malloc_high(sizeof(AmlCode_TPM));
+
+ tcpa = malloc_high(sizeof(*tcpa) + laml);
+ if (!tcpa || !*tpm_addr) {
+ warn_noalloc();
+ return 1;
+ }
Regards,
Stefan
