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authorHeinrich Schuchardt <xypron.glpk@gmx.de>2020-11-27 20:20:51 +0100
committerArd Biesheuvel <ardb@kernel.org>2020-12-09 08:37:27 +0100
commitff20661bb54cd57a18207b33cc57eb8d5c758a86 (patch)
treee54c96a4e31c52b275b8aafeed2c9254c35c8ac9
parentc0249238feefbbb99d517d06ace4338393901b67 (diff)
efi/efi_test: read RuntimeServicesSupported
Since the UEFI 2.8A specification the UEFI enabled firmware provides a configuration table EFI_RT_PROPERTIES_TABLE which indicates which runtime services are enabled. The EFI stub reads this table and saves the value of the field RuntimeServicesSupported internally. The Firmware Test Suite requires the value to determine if UEFI runtime services are correctly implemented. With this patch an IOCTL call is provided to read the value of the field RuntimeServicesSupported, e.g. #define EFI_RUNTIME_GET_SUPPORTED_MASK \ _IOR('p', 0x0C, unsigned int) unsigned int mask; fd = open("/dev/efi_test", O_RDWR); ret = ioctl(fd, EFI_RUNTIME_GET_SUPPORTED_MASK, &mask); Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Link: https://lore.kernel.org/r/20201127192051.1430-1-xypron.glpk@gmx.de Acked-by: Colin Ian King <colin.king@canonical.com> Acked-by: Ivan Hu <ivan.hu@canonical.com> Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
-rw-r--r--drivers/firmware/efi/test/efi_test.c16
-rw-r--r--drivers/firmware/efi/test/efi_test.h3
2 files changed, 19 insertions, 0 deletions
diff --git a/drivers/firmware/efi/test/efi_test.c b/drivers/firmware/efi/test/efi_test.c
index ddf9eae396fe..47d67bb0a516 100644
--- a/drivers/firmware/efi/test/efi_test.c
+++ b/drivers/firmware/efi/test/efi_test.c
@@ -663,6 +663,19 @@ out:
return rv;
}
+static long efi_runtime_get_supported_mask(unsigned long arg)
+{
+ unsigned int __user *supported_mask;
+ int rv = 0;
+
+ supported_mask = (unsigned int *)arg;
+
+ if (put_user(efi.runtime_supported_mask, supported_mask))
+ rv = -EFAULT;
+
+ return rv;
+}
+
static long efi_test_ioctl(struct file *file, unsigned int cmd,
unsigned long arg)
{
@@ -699,6 +712,9 @@ static long efi_test_ioctl(struct file *file, unsigned int cmd,
case EFI_RUNTIME_RESET_SYSTEM:
return efi_runtime_reset_system(arg);
+
+ case EFI_RUNTIME_GET_SUPPORTED_MASK:
+ return efi_runtime_get_supported_mask(arg);
}
return -ENOTTY;
diff --git a/drivers/firmware/efi/test/efi_test.h b/drivers/firmware/efi/test/efi_test.h
index f2446aa1c2e3..117349e57993 100644
--- a/drivers/firmware/efi/test/efi_test.h
+++ b/drivers/firmware/efi/test/efi_test.h
@@ -118,4 +118,7 @@ struct efi_resetsystem {
#define EFI_RUNTIME_RESET_SYSTEM \
_IOW('p', 0x0B, struct efi_resetsystem)
+#define EFI_RUNTIME_GET_SUPPORTED_MASK \
+ _IOR('p', 0x0C, unsigned int)
+
#endif /* _DRIVERS_FIRMWARE_EFI_TEST_H_ */