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authorLinus Torvalds <torvalds@linux-foundation.org>2021-02-26 10:28:35 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2021-02-26 10:28:35 -0800
commit8b83369ddcb3fb9cab5c1088987ce477565bb630 (patch)
tree825b1bc89bf731c15c5463befe4e9f14870f0811 /init
parent8f47d753d4ecc6d3e306e22d885d6772625a3423 (diff)
parentd7fbcf40df86bb67193d9faf52138fc1202decb2 (diff)
Merge tag 'riscv-for-linus-5.12-mw0' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
Pull RISC-V updates from Palmer Dabbelt: "A handful of new RISC-V related patches for this merge window: - A check to ensure drivers are properly using uaccess. This isn't manifesting with any of the drivers I'm currently using, but may catch errors in new drivers. - Some preliminary support for the FU740, along with the HiFive Unleashed it will appear on. - NUMA support for RISC-V, which involves making the arm64 code generic. - Support for kasan on the vmalloc region. - A handful of new drivers for the Kendryte K210, along with the DT plumbing required to boot on a handful of K210-based boards. - Support for allocating ASIDs. - Preliminary support for kernels larger than 128MiB. - Various other improvements to our KASAN support, including the utilization of huge pages when allocating the KASAN regions. We may have already found a bug with the KASAN_VMALLOC code, but it's passing my tests. There's a fix in the works, but that will probably miss the merge window. * tag 'riscv-for-linus-5.12-mw0' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux: (75 commits) riscv: Improve kasan population by using hugepages when possible riscv: Improve kasan population function riscv: Use KASAN_SHADOW_INIT define for kasan memory initialization riscv: Improve kasan definitions riscv: Get rid of MAX_EARLY_MAPPING_SIZE soc: canaan: Sort the Makefile alphabetically riscv: Disable KSAN_SANITIZE for vDSO riscv: Remove unnecessary declaration riscv: Add Canaan Kendryte K210 SD card defconfig riscv: Update Canaan Kendryte K210 defconfig riscv: Add Kendryte KD233 board device tree riscv: Add SiPeed MAIXDUINO board device tree riscv: Add SiPeed MAIX GO board device tree riscv: Add SiPeed MAIX DOCK board device tree riscv: Add SiPeed MAIX BiT board device tree riscv: Update Canaan Kendryte K210 device tree dt-bindings: add resets property to dw-apb-timer dt-bindings: fix sifive gpio properties dt-bindings: update sifive uart compatible string dt-bindings: update sifive clint compatible string ...
Diffstat (limited to 'init')
-rw-r--r--init/initramfs.c45
1 files changed, 45 insertions, 0 deletions
diff --git a/init/initramfs.c b/init/initramfs.c
index 5fa84711127a..d677e8e717f1 100644
--- a/init/initramfs.c
+++ b/init/initramfs.c
@@ -546,6 +546,51 @@ extern unsigned long __initramfs_size;
#include <linux/initrd.h>
#include <linux/kexec.h>
+void __init reserve_initrd_mem(void)
+{
+ phys_addr_t start;
+ unsigned long size;
+
+ /* Ignore the virtul address computed during device tree parsing */
+ initrd_start = initrd_end = 0;
+
+ if (!phys_initrd_size)
+ return;
+ /*
+ * Round the memory region to page boundaries as per free_initrd_mem()
+ * This allows us to detect whether the pages overlapping the initrd
+ * are in use, but more importantly, reserves the entire set of pages
+ * as we don't want these pages allocated for other purposes.
+ */
+ start = round_down(phys_initrd_start, PAGE_SIZE);
+ size = phys_initrd_size + (phys_initrd_start - start);
+ size = round_up(size, PAGE_SIZE);
+
+ if (!memblock_is_region_memory(start, size)) {
+ pr_err("INITRD: 0x%08llx+0x%08lx is not a memory region",
+ (u64)start, size);
+ goto disable;
+ }
+
+ if (memblock_is_region_reserved(start, size)) {
+ pr_err("INITRD: 0x%08llx+0x%08lx overlaps in-use memory region\n",
+ (u64)start, size);
+ goto disable;
+ }
+
+ memblock_reserve(start, size);
+ /* Now convert initrd to virtual addresses */
+ initrd_start = (unsigned long)__va(phys_initrd_start);
+ initrd_end = initrd_start + phys_initrd_size;
+ initrd_below_start_ok = 1;
+
+ return;
+disable:
+ pr_cont(" - disabling initrd\n");
+ initrd_start = 0;
+ initrd_end = 0;
+}
+
void __weak __init free_initrd_mem(unsigned long start, unsigned long end)
{
#ifdef CONFIG_ARCH_KEEP_MEMBLOCK

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