Merge tag 'firmware-20250304-pull-request' of https://gitlab.com/kraxel/qemu into staging

- add uefi variable store support

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* tag 'firmware-20250304-pull-request' of https://gitlab.com/kraxel/qemu: (24 commits)
  docs: add uefi variable service documentation
  hw/uefi: add MAINTAINERS entry
  hw/uefi-vars-sysbus: allow for pc and q35
  hw/uefi-vars-sysbus: allow for arm virt
  hw/uefi-vars-sysbus: add x64 variant
  hw/uefi-vars-sysbus: qemu platform bus support
  hw/uefi: add uefi-vars-sysbus device
  hw/uefi: add to meson
  hw/uefi: add UEFI_VARS to Kconfig
  hw/uefi: add trace-events
  hw/uefi: add var-service-json.c + qapi for NV vars.
  hw/uefi: add var-service-siglist.c
  hw/uefi: add var-service-pkcs7-stub.c
  hw/uefi: add var-service-pkcs7.c
  hw/uefi: add var-service-core.c
  hw/uefi: add var-service-policy.c
  hw/uefi: add var-service-auth.c
  hw/uefi: add var-service-vars.c
  hw/uefi: add var-service-utils.c
  hw/uefi: add var-service-guid.c
  ...

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

1 files changed, 191 insertions, 0 deletions

diff --git a/include/hw/uefi/var-service.h b/include/hw/uefi/var-service.h
new file mode 100644
index 0000000000..f7ceac4ce2
--- /dev/null
+++ b/include/hw/uefi/var-service.h
@@ -0,0 +1,191 @@
+/*
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * uefi-vars device - state struct and function prototypes
+ */
+#ifndef QEMU_UEFI_VAR_SERVICE_H
+#define QEMU_UEFI_VAR_SERVICE_H
+
+#include "qemu/uuid.h"
+#include "qemu/queue.h"
+
+#include "hw/uefi/var-service-edk2.h"
+
+#define MAX_BUFFER_SIZE (64 * 1024)
+
+typedef struct uefi_variable uefi_variable;
+typedef struct uefi_var_policy uefi_var_policy;
+typedef struct uefi_vars_state uefi_vars_state;
+
+typedef struct uefi_vars_cert uefi_vars_cert;
+typedef struct uefi_vars_hash uefi_vars_hash;
+typedef struct uefi_vars_siglist uefi_vars_siglist;
+
+struct uefi_variable {
+    QemuUUID                          guid;
+    uint16_t                          *name;
+    uint32_t                          name_size;
+    uint32_t                          attributes;
+    void                              *data;
+    uint32_t                          data_size;
+    efi_time                          time;
+    void                              *digest;
+    uint32_t                          digest_size;
+    QTAILQ_ENTRY(uefi_variable)       next;
+};
+
+struct uefi_var_policy {
+    variable_policy_entry             *entry;
+    uint32_t                          entry_size;
+    uint16_t                          *name;
+    uint32_t                          name_size;
+
+    /* number of hashmarks (wildcard character) in name */
+    uint32_t                          hashmarks;
+
+    QTAILQ_ENTRY(uefi_var_policy)     next;
+};
+
+struct uefi_vars_state {
+    MemoryRegion                      mr;
+    uint16_t                          sts;
+    uint32_t                          buf_size;
+    uint32_t                          buf_addr_lo;
+    uint32_t                          buf_addr_hi;
+    uint8_t                           *buffer;
+    QTAILQ_HEAD(, uefi_variable)      variables;
+    QTAILQ_HEAD(, uefi_var_policy)    var_policies;
+
+    /* pio transfer buffer */
+    uint32_t                          pio_xfer_offset;
+    uint8_t                           *pio_xfer_buffer;
+
+    /* boot phases */
+    bool                              end_of_dxe;
+    bool                              ready_to_boot;
+    bool                              exit_boot_service;
+    bool                              policy_locked;
+
+    /* storage accounting */
+    uint64_t                          max_storage;
+    uint64_t                          used_storage;
+
+    /* config options */
+    char                              *jsonfile;
+    int                               jsonfd;
+    bool                              force_secure_boot;
+    bool                              disable_custom_mode;
+    bool                              use_pio;
+};
+
+struct uefi_vars_cert {
+    QTAILQ_ENTRY(uefi_vars_cert)  next;
+    QemuUUID                      owner;
+    uint64_t                      size;
+    uint8_t                       data[];
+};
+
+struct uefi_vars_hash {
+    QTAILQ_ENTRY(uefi_vars_hash)  next;
+    QemuUUID                      owner;
+    uint8_t                       data[];
+};
+
+struct uefi_vars_siglist {
+    QTAILQ_HEAD(, uefi_vars_cert)  x509;
+    QTAILQ_HEAD(, uefi_vars_hash)  sha256;
+};
+
+/* vars-service-guid.c */
+extern const QemuUUID EfiGlobalVariable;
+extern const QemuUUID EfiImageSecurityDatabase;
+extern const QemuUUID EfiCustomModeEnable;
+extern const QemuUUID EfiSecureBootEnableDisable;
+
+extern const QemuUUID EfiCertSha256Guid;
+extern const QemuUUID EfiCertSha384Guid;
+extern const QemuUUID EfiCertSha512Guid;
+extern const QemuUUID EfiCertRsa2048Guid;
+extern const QemuUUID EfiCertX509Guid;
+extern const QemuUUID EfiCertTypePkcs7Guid;
+
+extern const QemuUUID EfiSmmVariableProtocolGuid;
+extern const QemuUUID VarCheckPolicyLibMmiHandlerGuid;
+
+extern const QemuUUID EfiEndOfDxeEventGroupGuid;
+extern const QemuUUID EfiEventReadyToBootGuid;
+extern const QemuUUID EfiEventExitBootServicesGuid;
+
+/* vars-service-utils.c */
+gboolean uefi_str_is_valid(const uint16_t *str, size_t len,
+                           gboolean must_be_null_terminated);
+size_t uefi_strlen(const uint16_t *str, size_t len);
+gboolean uefi_str_equal_ex(const uint16_t *a, size_t alen,
+                           const uint16_t *b, size_t blen,
+                           gboolean wildcards_in_a);
+gboolean uefi_str_equal(const uint16_t *a, size_t alen,
+                        const uint16_t *b, size_t blen);
+char *uefi_ucs2_to_ascii(const uint16_t *ucs2, uint64_t ucs2_size);
+int uefi_time_compare(efi_time *a, efi_time *b);
+void uefi_trace_variable(const char *action, QemuUUID guid,
+                         const uint16_t *name, uint64_t name_size);
+void uefi_trace_status(const char *action, efi_status status);
+
+/* vars-service-core.c */
+extern const VMStateDescription vmstate_uefi_vars;
+void uefi_vars_init(Object *obj, uefi_vars_state *uv);
+void uefi_vars_realize(uefi_vars_state *uv, Error **errp);
+void uefi_vars_hard_reset(uefi_vars_state *uv);
+
+/* vars-service-json.c */
+void uefi_vars_json_init(uefi_vars_state *uv, Error **errp);
+void uefi_vars_json_save(uefi_vars_state *uv);
+void uefi_vars_json_load(uefi_vars_state *uv, Error **errp);
+
+/* vars-service-vars.c */
+extern const VMStateDescription vmstate_uefi_variable;
+uefi_variable *uefi_vars_find_variable(uefi_vars_state *uv, QemuUUID guid,
+                                       const uint16_t *name,
+                                       uint64_t name_size);
+void uefi_vars_set_variable(uefi_vars_state *uv, QemuUUID guid,
+                            const uint16_t *name, uint64_t name_size,
+                            uint32_t attributes,
+                            void *data, uint64_t data_size);
+void uefi_vars_clear_volatile(uefi_vars_state *uv);
+void uefi_vars_clear_all(uefi_vars_state *uv);
+void uefi_vars_update_storage(uefi_vars_state *uv);
+uint32_t uefi_vars_mm_vars_proto(uefi_vars_state *uv);
+
+/* vars-service-auth.c */
+bool uefi_vars_is_sb_pk(uefi_variable *var);
+bool uefi_vars_is_sb_any(uefi_variable *var);
+efi_status uefi_vars_check_auth_2(uefi_vars_state *uv, uefi_variable *var,
+                                  mm_variable_access *va, void *data);
+efi_status uefi_vars_check_secure_boot(uefi_vars_state *uv, uefi_variable *var);
+void uefi_vars_auth_init(uefi_vars_state *uv);
+
+/* vars-service-pkcs7.c */
+efi_status uefi_vars_check_pkcs7_2(uefi_variable *siglist,
+                                   void **digest, uint32_t *digest_size,
+                                   mm_variable_access *va, void *data);
+
+/* vars-service-siglist.c */
+void uefi_vars_siglist_init(uefi_vars_siglist *siglist);
+void uefi_vars_siglist_free(uefi_vars_siglist *siglist);
+void uefi_vars_siglist_parse(uefi_vars_siglist *siglist,
+                             void *data, uint64_t size);
+uint64_t uefi_vars_siglist_blob_size(uefi_vars_siglist *siglist);
+void uefi_vars_siglist_blob_generate(uefi_vars_siglist *siglist,
+                                     void *data, uint64_t size);
+
+/* vars-service-policy.c */
+extern const VMStateDescription vmstate_uefi_var_policy;
+efi_status uefi_vars_policy_check(uefi_vars_state *uv,
+                                  uefi_variable *var,
+                                  gboolean is_newvar);
+void uefi_vars_policies_clear(uefi_vars_state *uv);
+uefi_var_policy *uefi_vars_add_policy(uefi_vars_state *uv,
+                                      variable_policy_entry *pe);
+uint32_t uefi_vars_mm_check_policy_proto(uefi_vars_state *uv);
+
+#endif /* QEMU_UEFI_VAR_SERVICE_H */