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author | Xianting Tian <xianting.tian@linux.alibaba.com> | 2022-05-18 04:34:28 +0300 |
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committer | Palmer Dabbelt <palmer@rivosinc.com> | 2022-06-02 08:03:50 +0300 |
commit | e61bf5c071148c80d091f8e7220b3b9130780ae3 (patch) | |
tree | e3150277564b122e05cbac91e352b246626a3ca4 /arch/riscv/include/asm/pgtable-bits.h | |
parent | 02d88b40cb2e9614e0117c3385afdce878f0d377 (diff) | |
download | linux-e61bf5c071148c80d091f8e7220b3b9130780ae3.tar.xz |
RISC-V: Mark IORESOURCE_EXCLUSIVE for reserved mem instead of IORESOURCE_BUSY
Commit 00ab027a3b82 ("RISC-V: Add kernel image sections to the resource tree")
marked IORESOURCE_BUSY for reserved memory, which caused resource map
failed in subsequent operations of related driver, so remove the
IORESOURCE_BUSY flag. In order to prohibit userland mapping reserved
memory, mark IORESOURCE_EXCLUSIVE for it.
The code to reproduce the issue,
dts:
mem0: memory@a0000000 {
reg = <0x0 0xa0000000 0 0x1000000>;
no-map;
};
&test {
status = "okay";
memory-region = <&mem0>;
};
code:
np = of_parse_phandle(pdev->dev.of_node, "memory-region", 0);
ret = of_address_to_resource(np, 0, &r);
base = devm_ioremap_resource(&pdev->dev, &r);
// base = -EBUSY
Fixes: 00ab027a3b82 ("RISC-V: Add kernel image sections to the resource tree")
Reported-by: Huaming Jiang <jianghuaming.jhm@alibaba-inc.com>
Reviewed-by: Guo Ren <guoren@kernel.org>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Co-developed-by: Nick Kossifidis <mick@ics.forth.gr>
Signed-off-by: Xianting Tian <xianting.tian@linux.alibaba.com>
Link: https://lore.kernel.org/r/20220518013428.1338983-1-xianting.tian@linux.alibaba.com
Cc: stable@vger.kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Diffstat (limited to 'arch/riscv/include/asm/pgtable-bits.h')
0 files changed, 0 insertions, 0 deletions