diff options
| author | Borislav Petkov <bp@suse.de> | 2020-03-18 21:27:48 +0300 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2020-03-19 12:55:56 +0300 |
| commit | 870b4333a62e45b0b2000d14b301b7b8b8cad9da (patch) | |
| tree | 88187aa363c35ddf18c39cea871a7f7e6c23c796 /arch | |
| parent | fb33c6510d5595144d585aa194d377cf74d31911 (diff) | |
| download | linux-870b4333a62e45b0b2000d14b301b7b8b8cad9da.tar.xz | |
x86/ioremap: Fix CONFIG_EFI=n build
In order to use efi_mem_type(), one needs CONFIG_EFI enabled. Otherwise
that function is undefined. Use IS_ENABLED() to check and avoid the
ifdeffery as the compiler optimizes away the following unreachable code
then.
Fixes: 985e537a4082 ("x86/ioremap: Map EFI runtime services data as encrypted for SEV")
Reported-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: <stable@vger.kernel.org>
Link: https://lkml.kernel.org/r/7561e981-0d9b-d62c-0ef2-ce6007aff1ab@infradead.org
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/mm/ioremap.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c index 935a91e1fd77..18c637c0dc6f 100644 --- a/arch/x86/mm/ioremap.c +++ b/arch/x86/mm/ioremap.c @@ -115,6 +115,9 @@ static void __ioremap_check_other(resource_size_t addr, struct ioremap_desc *des if (!sev_active()) return; + if (!IS_ENABLED(CONFIG_EFI)) + return; + if (efi_mem_type(addr) == EFI_RUNTIME_SERVICES_DATA) desc->flags |= IORES_MAP_ENCRYPTED; } |