linux_dsm_epyc7002/arch/riscv
Alexandre Ghiti bd9f7dc079 riscv: Get rid of MAX_EARLY_MAPPING_SIZE
commit 0f02de4481da684aad6589aed0ea47bd1ab391c9 upstream.

At early boot stage, we have a whole PGDIR to map the kernel, so there
is no need to restrict the early mapping size to 128MB. Removing this
define also allows us to simplify some compile time logic.

This fixes large kernel mappings with a size greater than 128MB, as it
is the case for syzbot kernels whose size was just ~130MB.

Note that on rv64, for now, we are then limited to PGDIR size for early
mapping as we can't use PGD mappings (see [1]). That should be enough
given the relative small size of syzbot kernels compared to PGDIR_SIZE
which is 1GB.

[1] https://lore.kernel.org/lkml/20200603153608.30056-1-alex@ghiti.fr/

Reported-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Alexandre Ghiti <alex@ghiti.fr>
Tested-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-03-07 12:34:05 +01:00
..
boot Revert "dts: phy: add GPIO number and active state used for phy reset" 2021-02-17 11:02:20 +01:00
configs riscv: defconfig: enable gpio support for HiFive Unleashed 2021-01-27 11:55:01 +01:00
include riscv: virt_addr_valid must check the address belongs to linear mapping 2021-02-17 11:02:23 +01:00
kernel riscv: Disable KSAN_SANITIZE for vDSO 2021-03-04 11:38:36 +01:00
lib riscv: use memcpy based uaccess for nommu again 2020-10-04 10:27:07 -07:00
mm riscv: Get rid of MAX_EARLY_MAPPING_SIZE 2021-03-07 12:34:05 +01:00
net treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
Kbuild riscv: Allow device trees to be built into the kernel 2020-05-18 11:38:05 -07:00
Kconfig RISC-V: Define MAXPHYSMEM_1GB only for RV32 2021-02-10 09:29:17 +01:00
Kconfig.debug RISC-V: Remove EARLY_PRINTK support 2018-12-17 10:23:46 -08:00
Kconfig.socs RISC-V: Remove CLINT related code from timer and arch 2020-08-20 10:58:13 -07:00
Makefile Kbuild updates for v5.10 2020-10-22 13:13:57 -07:00