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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 /drivers/firmware/efi/test/efi_test.c
parentefi: arm: reduce minimum alignment of uncompressed kernel (diff)
downloadlinux-dev-ff20661bb54cd57a18207b33cc57eb8d5c758a86.tar.xz
linux-dev-ff20661bb54cd57a18207b33cc57eb8d5c758a86.zip
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>
Diffstat (limited to 'drivers/firmware/efi/test/efi_test.c')
-rw-r--r--drivers/firmware/efi/test/efi_test.c16
1 files changed, 16 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;