HV: Add acpi_fixup api to override acpi on needs

Add acpi_fixup() api in bsp that can override platform ACPI info when
do init_bsp(), this is useful when platform bootloader is not lock
down before production.

In current code only the wake vector addresses would be parsed after
boot and then override to host_acpi_info, we can add more in furture
based on our needs.

Tracked-On: #1264

Signed-off-by: Victor Sun <victor.sun@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>

Author: jsun26intel

hypervisor/boot/acpi.c

@@ -364,4 +364,19 @@ static void *get_facs_table(void)
 	return facs_addr;
 }
 
+/* put all ACPI fix up code here */
+void acpi_fixup(void)
+{
+	uint8_t *facs_addr;
+
+	facs_addr = get_facs_table();
+
+	if (facs_addr != NULL) {
+		host_acpi_info.pm_s_state.wake_vector_32 =
+			(uint32_t *)(facs_addr + OFFSET_WAKE_VECTOR_32);
+		host_acpi_info.pm_s_state.wake_vector_64 =
+			(uint64_t *)(facs_addr + OFFSET_WAKE_VECTOR_64);
+	}
+}
+
 #endif

hypervisor/bsp/include/bsp_extern.h

@@ -36,4 +36,8 @@ extern struct acpi_info host_acpi_info;
 /* BSP Interfaces */
 void init_bsp(void);
 
+#ifndef CONFIG_CONSTANT_ACPI
+void acpi_fixup(void);
+#endif
+
 #endif /* BSP_EXTERN_H */

hypervisor/bsp/sbl/sbl.c

@@ -62,4 +62,7 @@ struct dmar_info *get_dmar_info(void)
 
 void    init_bsp(void)
 {
+#ifndef CONFIG_CONSTANT_ACPI
+	acpi_fixup();
+#endif
 }

hypervisor/bsp/uefi/uefi.c

@@ -115,6 +115,9 @@ static void efi_init(void)
 
 void init_bsp(void)
 {
+#ifndef CONFIG_CONSTANT_ACPI
+	acpi_fixup();
+#endif
 	parse_hv_cmdline();
 
 #ifdef CONFIG_EFI_STUB