linux-kernel - [PATCH 5.13 136/223] RISC-V: load initrd wherever it fits into memory

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Date:   Mon, 26 Jul 2021 17:38:48 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Andreas Schwab <schwab@...ux-m68k.org>,
        Heinrich Schuchardt <xypron.glpk@....de>,
        Atish Patra <atish.patra@....com>,
        Ard Biesheuvel <ardb@...nel.org>,
        Palmer Dabbelt <palmerdabbelt@...gle.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.13 136/223] RISC-V: load initrd wherever it fits into memory

From: Heinrich Schuchardt <xypron.glpk@....de>

[ Upstream commit c79e89ecaa246c880292ba68cbe08c9c30db77e3 ]

Requiring that initrd is loaded below RAM start + 256 MiB led to failure
to boot SUSE Linux with GRUB on QEMU, cf.
https://lists.gnu.org/archive/html/grub-devel/2021-06/msg00037.html

Remove the constraint.

Reported-by: Andreas Schwab <schwab@...ux-m68k.org>
Signed-off-by: Heinrich Schuchardt <xypron.glpk@....de>
Reviewed-by: Atish Patra <atish.patra@....com>
Acked-by: Ard Biesheuvel <ardb@...nel.org>
Fixes: d7071743db31 ("RISC-V: Add EFI stub support.")
Signed-off-by: Palmer Dabbelt <palmerdabbelt@...gle.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/riscv/include/asm/efi.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/riscv/include/asm/efi.h b/arch/riscv/include/asm/efi.h
index 6d98cd999680..7b3483ba2e84 100644
--- a/arch/riscv/include/asm/efi.h
+++ b/arch/riscv/include/asm/efi.h
@@ -27,10 +27,10 @@ int efi_set_mapping_permissions(struct mm_struct *mm, efi_memory_desc_t *md);
 
 #define ARCH_EFI_IRQ_FLAGS_MASK (SR_IE | SR_SPIE)
 
-/* Load initrd at enough distance from DRAM start */
+/* Load initrd anywhere in system RAM */
 static inline unsigned long efi_get_max_initrd_addr(unsigned long image_addr)
 {
-	return image_addr + SZ_256M;
+	return ULONG_MAX;
 }
 
 #define alloc_screen_info(x...)		(&screen_info)
-- 
2.30.2