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List: fwts-devel
Subject: [PATCH 2/2] efi_runtime: add UEFI runtime service QueryVariableInfo interface
From: Ivan Hu <ivan.hu () canonical ! com>
Date: 2012-09-28 8:26:49
Message-ID: 1348820809-4489-1-git-send-email-ivan.hu () canonical ! com
[Download RAW message or body]
This interface is always returned EFI_UNSUPPORTED from
virt_fei_query_variable_info on kernel driver efi.c because of checking
the runtime_version. It seems that runtime_version value always 0,
it alway returns EFI_UNSUPPORTED. Need a patch of efi.c for this interface.
Signed-off-by: Ivan Hu <ivan.hu@canonical.com>
---
efi_runtime/efi_runtime.c | 20 ++++++++++++++++++++
efi_runtime/efi_runtime.h | 11 +++++++++++
2 files changed, 31 insertions(+)
diff --git a/efi_runtime/efi_runtime.c b/efi_runtime/efi_runtime.c
index 227a910..0e66e94 100644
--- a/efi_runtime/efi_runtime.c
+++ b/efi_runtime/efi_runtime.c
@@ -117,6 +117,8 @@ static long efi_runtime_ioctl(struct file *file, unsigned int cmd,
struct efi_getnextvariablename __user *pgetnextvariablename;
unsigned long name_size;
+ struct efi_queryvariableinfo __user *pqueryvariableinfo;
+
switch (cmd) {
case EFI_RUNTIME_GET_VARIABLE:
pgetvariable = (struct efi_getvariable __user *)arg;
@@ -261,6 +263,24 @@ static long efi_runtime_ioctl(struct file *file, unsigned int cmd,
&vendor_guid, sizeof(EFI_GUID)))
return -EFAULT;
return 0;
+
+ case EFI_RUNTIME_QUERY_VARIABLEINFO:
+
+ pqueryvariableinfo = (struct efi_queryvariableinfo __user *)arg;
+
+ if (get_user(attr, &pqueryvariableinfo->Attributes))
+ return -EFAULT;
+
+ status = efi.query_variable_info(attr,
+ pqueryvariableinfo->MaximumVariableStorageSize,
+ pqueryvariableinfo->RemainingVariableStorageSize
+ , pqueryvariableinfo->MaximumVariableSize);
+ if (put_user(status, pqueryvariableinfo->status))
+ return -EFAULT;
+ if (status != EFI_SUCCESS)
+ return -EINVAL;
+
+ return 0;
}
return -ENOTTY;
diff --git a/efi_runtime/efi_runtime.h b/efi_runtime/efi_runtime.h
index 7387406..cc33878 100644
--- a/efi_runtime/efi_runtime.h
+++ b/efi_runtime/efi_runtime.h
@@ -73,6 +73,14 @@ struct efi_getnextvariablename {
uint64_t *status;
} __attribute__ ((packed));
+struct efi_queryvariableinfo {
+ uint32_t Attributes;
+ uint64_t *MaximumVariableStorageSize;
+ uint64_t *RemainingVariableStorageSize;
+ uint64_t *MaximumVariableSize;
+ uint64_t *status;
+} __attribute__ ((packed));
+
struct efi_gettime {
EFI_TIME *Time;
EFI_TIME_CAPABILITIES *Capabilities;
@@ -116,4 +124,7 @@ struct efi_setwakeuptime {
#define EFI_RUNTIME_GET_NEXTVARIABLENAME \
_IOWR('p', 0x07, struct efi_getnextvariablename)
+#define EFI_RUNTIME_QUERY_VARIABLEINFO \
+ _IOR('p', 0x08, struct efi_queryvariableinfo)
+
#endif /* _EFI_RUNTIME_H_ */
--
1.7.9.5
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