From mboxrd@z Thu Jan 1 00:00:00 1970 From: dyoung@redhat.com (Dave Young) Date: Thu, 14 Aug 2014 17:15:30 +0800 Subject: [PATCH 5/7] arm64/efi: do not enter virtual mode in case booting with efi=noruntime or noefi In-Reply-To: <1408007731-15081-1-git-send-email-dyoung@redhat.com> References: <1408007731-15081-1-git-send-email-dyoung@redhat.com> Message-ID: <1408007731-15081-5-git-send-email-dyoung@redhat.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org In case efi runtime disabled via noefi kernel cmdline arm64_enter_virtual_mode should error out. At the same time move early_memunmap(memmap.map, mapsize) to the beginning of the function or it will leak early mem. Signed-off-by: Dave Young --- arch/arm64/kernel/efi.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/arch/arm64/kernel/efi.c b/arch/arm64/kernel/efi.c index 6ed0362..309fab1 100644 --- a/arch/arm64/kernel/efi.c +++ b/arch/arm64/kernel/efi.c @@ -392,11 +392,16 @@ static int __init arm64_enter_virtual_mode(void) return -1; } + mapsize = memmap.map_end - memmap.map; + if (efi_runtime_disabled()) { + early_memunmap(memmap.map, mapsize); + pr_info("EFI runtime services will be disabled.\n"); + return -1; + } + pr_info("Remapping and enabling EFI services.\n"); /* replace early memmap mapping with permanent mapping */ - mapsize = memmap.map_end - memmap.map; - early_memunmap(memmap.map, mapsize); memmap.map = (__force void *)ioremap_cache((phys_addr_t)memmap.phys_map, mapsize); memmap.map_end = memmap.map + mapsize; -- 1.8.3.1