linux-kernel - [PATCH 1/1] RISC-V: load initrd wherever it fits into memory

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Message-Id: <20210629134018.62859-1-xypron.glpk@gmx.de>
Date:   Tue, 29 Jun 2021 15:40:18 +0200
From:   Heinrich Schuchardt <xypron.glpk@....de>
To:     Ard Biesheuvel <ardb@...nel.org>
Cc:     Andreas Schwab <schwab@...ux-m68k.org>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Atish Patra <atish.patra@....com>, linux-efi@...r.kernel.org,
        linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Heinrich Schuchardt <xypron.glpk@....de>
Subject: [PATCH 1/1] RISC-V: load initrd wherever it fits into memory

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>
---
 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 7542282f1141..649ab513dc99 100644
--- a/arch/riscv/include/asm/efi.h
+++ b/arch/riscv/include/asm/efi.h
@@ -33,10 +33,10 @@ static inline unsigned long efi_get_max_fdt_addr(unsigned long image_addr)

 #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