igvm: Remove unused firmware metadata base address from IGVM params

Following the changes to SVSM that mean the firmware configuration is
always completely described by the IGVM parameter block, this commit
removes the now unused 'metadata' field that previously defined the
location of the OVMF metadata page in guest memory.

Signed-off-by: Roy Hopkins <roy.hopkins@suse.com>

bootlib/src/igvm_params.rs

@@ -48,12 +48,7 @@ pub struct IgvmParamBlockFwInfo {
     /// no firmware is launched after initialization is complete.
     pub size: u32,
 
-    /// The guest physical address of the page that contains metadata that
-    /// corresponds to the firmware. The SVSM expects the page to contain
-    /// metadata in the format defined by OVMF. If this field is zero but
-    /// a firmware range has been provided then the firmware is launched
-    /// without parsing any metadata.
-    pub metadata: u32,
+    _reserved: u32,
 
     /// The guest physical address at which the firmware expects to find the
     /// secrets page.

igvmbld/igvm_defs.h

@@ -106,7 +106,7 @@ typedef struct {
 typedef struct {
     uint32_t start;
     uint32_t size;
-    uint32_t metadata;
+    uint32_t _reserved;
     uint32_t secrets_page;
     uint32_t caa_page;
     uint32_t cpuid_page;
@@ -122,7 +122,7 @@ typedef struct {
     uint32_t cpuid_page;
     uint32_t secrets_page;
     uint16_t debug_serial_port;
-    uint16_t _reserved1;
+    uint16_t _reserved;
     IgvmParamBlockFwInfo firmware;
     uint32_t kernel_reserved_size;
     uint32_t kernel_size;

igvmbld/igvmbld.c

@@ -910,7 +910,6 @@ static void print_fw_metadata(IgvmParamBlock *igvm_parameter_block)
     printf("Firmware configuration\n======================\n");
     printf("  start: %X\n", igvm_parameter_block->firmware.start);
     printf("  size: %X\n", igvm_parameter_block->firmware.size);
-    printf("  metadata: %X\n", igvm_parameter_block->firmware.metadata);
     printf("  secrets_page: %X\n", igvm_parameter_block->firmware.secrets_page);
     printf("  caa_page: %X\n", igvm_parameter_block->firmware.caa_page);
     printf("  cpuid_page: %X\n", igvm_parameter_block->firmware.cpuid_page);