include/cpu/x86: Add STM Support

Addtions to include/cpu/x86 include for STM support.

Change-Id: I2b8e68b2928aefc7996b6a9560c52f71c7c0e1d0
Signed-off-by: Eugene D. Myers <edmyers@tycho.nsa.gov>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/33985
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>
Reviewed-by: ron minnich <rminnich@gmail.com>

src/include/cpu/x86/msr.h

@@ -30,6 +30,10 @@
 #define IA32_BIOS_SIGN_ID		0x8b
 #define IA32_MPERF			0xe7
 #define IA32_APERF			0xe8
+/* STM */
+#define IA32_SMM_MONITOR_CTL_MSR        0x9B
+#define SMBASE_RO_MSR			0x98
+#define IA32_SMM_MONITOR_VALID          (1<<0)
 #define IA32_MCG_CAP			0x179
 #define  MCG_CTL_P			(1 << 3)
 #define  MCA_BANKS_MASK			0xff
@@ -48,6 +52,8 @@
 #define IA32_PAT			0x277
 #define IA32_MC0_CTL			0x400
 #define IA32_MC0_STATUS			0x401
+#define IA32_VMX_BASIC_MSR              0x480
+#define IA32_VMX_MISC_MSR               0x485
 #define  MCA_STATUS_HI_VAL		(1UL << (63 - 32))
 #define  MCA_STATUS_HI_OVERFLOW		(1UL << (62 - 32))
 #define  MCA_STATUS_HI_UC		(1UL << (61 - 32))

src/include/cpu/x86/smm.h

@@ -64,6 +64,9 @@ extern unsigned char _binary_smm_end[];
 struct smm_runtime {
 	u32 smbase;
 	u32 save_state_size;
+	u32 num_cpus;
+	/* STM's 32bit entry into SMI handler */
+	u32 start32_offset;
 	/* The apic_id_to_cpu provides a mapping from APIC id to CPU number.
 	 * The CPU number is indicated by the index into the array by matching
 	 * the default APIC id and value at the index. The stub loader