From: Palmer Dabbelt <palmer@rivosinc.com> To: linux-riscv@lists.infradead.org Cc: Paul Walmsley <paul.walmsley@sifive.com>, Palmer Dabbelt <palmer@dabbelt.com>, aou@eecs.berkeley.edu, anup.patel@wdc.com, heinrich.schuchardt@canonical.com, atish.patra@wdc.com, bin.meng@windriver.com, sagar.kadam@sifive.com, damien.lemoal@wdc.com, axboe@kernel.dk, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, Palmer Dabbelt <palmer@rivosinc.com>, stable@vger.kernel.org Subject: [PATCH 02/12] RISC-V: MAXPHYSMEM_2GB doesn't depend on CMODEL_MEDLOW Date: Fri, 19 Nov 2021 08:44:03 -0800 [thread overview] Message-ID: <20211119164413.29052-3-palmer@rivosinc.com> (raw) In-Reply-To: <20211119164413.29052-1-palmer@rivosinc.com> From: Palmer Dabbelt <palmer@rivosinc.com> For non-relocatable kernels we need to be able to link the kernel at approximately PAGE_OFFSET, thus requiring medany (as medlow requires the code to be linked within 2GiB of 0). The inverse doesn't apply, though: since medany code can be linked anywhere it's fine to link it close to 0, so we can support the smaller memory config. Fixes: de5f4b8f634b ("RISC-V: Define MAXPHYSMEM_1GB only for RV32") Cc: stable@vger.kernel.org Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com> --- I found this when going through the savedefconfig diffs for the K210 defconfigs. I'm not entirely sure they're doing the right thing here (they should probably be setting CMODEL_LOW to take advantage of the better code generation), but I don't have any way to test those platforms so I don't want to change too much. --- arch/riscv/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index 821252b65f89..61f64512dcde 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -280,7 +280,7 @@ choice depends on 32BIT bool "1GiB" config MAXPHYSMEM_2GB - depends on 64BIT && CMODEL_MEDLOW + depends on 64BIT bool "2GiB" config MAXPHYSMEM_128GB depends on 64BIT && CMODEL_MEDANY -- 2.32.0
WARNING: multiple messages have this Message-ID (diff)
From: Palmer Dabbelt <palmer@rivosinc.com> To: linux-riscv@lists.infradead.org Cc: Paul Walmsley <paul.walmsley@sifive.com>, Palmer Dabbelt <palmer@dabbelt.com>, aou@eecs.berkeley.edu, anup.patel@wdc.com, heinrich.schuchardt@canonical.com, atish.patra@wdc.com, bin.meng@windriver.com, sagar.kadam@sifive.com, damien.lemoal@wdc.com, axboe@kernel.dk, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, Palmer Dabbelt <palmer@rivosinc.com>, stable@vger.kernel.org Subject: [PATCH 02/12] RISC-V: MAXPHYSMEM_2GB doesn't depend on CMODEL_MEDLOW Date: Fri, 19 Nov 2021 08:44:03 -0800 [thread overview] Message-ID: <20211119164413.29052-3-palmer@rivosinc.com> (raw) In-Reply-To: <20211119164413.29052-1-palmer@rivosinc.com> From: Palmer Dabbelt <palmer@rivosinc.com> For non-relocatable kernels we need to be able to link the kernel at approximately PAGE_OFFSET, thus requiring medany (as medlow requires the code to be linked within 2GiB of 0). The inverse doesn't apply, though: since medany code can be linked anywhere it's fine to link it close to 0, so we can support the smaller memory config. Fixes: de5f4b8f634b ("RISC-V: Define MAXPHYSMEM_1GB only for RV32") Cc: stable@vger.kernel.org Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com> --- I found this when going through the savedefconfig diffs for the K210 defconfigs. I'm not entirely sure they're doing the right thing here (they should probably be setting CMODEL_LOW to take advantage of the better code generation), but I don't have any way to test those platforms so I don't want to change too much. --- arch/riscv/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index 821252b65f89..61f64512dcde 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -280,7 +280,7 @@ choice depends on 32BIT bool "1GiB" config MAXPHYSMEM_2GB - depends on 64BIT && CMODEL_MEDLOW + depends on 64BIT bool "2GiB" config MAXPHYSMEM_128GB depends on 64BIT && CMODEL_MEDANY -- 2.32.0 _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv
next prev parent reply other threads:[~2021-11-19 16:44 UTC|newest] Thread overview: 84+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-11-19 16:44 [PATCH 0/12] RISC-V: Clean up the defconfigs Palmer Dabbelt 2021-11-19 16:44 ` Palmer Dabbelt 2021-11-19 16:44 ` [PATCH 01/12] RISC-V: defconfigs: Set CONFIG_FB=y, for FB console Palmer Dabbelt 2021-11-19 16:44 ` Palmer Dabbelt 2021-11-20 3:56 ` Anup Patel 2021-11-20 3:56 ` Anup Patel 2021-11-19 16:44 ` Palmer Dabbelt [this message] 2021-11-19 16:44 ` [PATCH 02/12] RISC-V: MAXPHYSMEM_2GB doesn't depend on CMODEL_MEDLOW Palmer Dabbelt 2021-11-20 3:57 ` Anup Patel 2021-11-20 3:57 ` Anup Patel 2022-01-11 16:04 ` Geert Uytterhoeven 2022-01-11 16:04 ` Geert Uytterhoeven 2022-01-11 16:14 ` Alexandre ghiti 2022-01-11 16:14 ` Alexandre ghiti 2022-01-14 10:12 ` Geert Uytterhoeven 2022-01-14 10:12 ` Geert Uytterhoeven 2022-01-14 11:11 ` Alexandre Ghiti 2022-01-14 11:11 ` Alexandre Ghiti 2022-01-14 8:40 ` Conor.Dooley 2022-01-14 8:40 ` Conor.Dooley 2022-01-14 9:09 ` Alexandre ghiti 2022-01-14 9:09 ` Alexandre ghiti 2022-01-14 9:41 ` Conor.Dooley 2022-01-14 9:41 ` Conor.Dooley 2022-01-14 9:45 ` Alexandre Ghiti 2022-01-14 9:45 ` Alexandre Ghiti 2021-11-19 16:44 ` [PATCH 03/12] RISC-V: defconfigs: Sort CONFIG_BPF_SYSCALL Palmer Dabbelt 2021-11-19 16:44 ` Palmer Dabbelt 2021-11-20 3:58 ` Anup Patel 2021-11-20 3:58 ` Anup Patel 2021-11-19 16:44 ` [PATCH 04/12] RISC-V: defconfigs: Sort CONFIG_SYSFS_SYSCALL Palmer Dabbelt 2021-11-19 16:44 ` Palmer Dabbelt 2021-11-20 3:58 ` Anup Patel 2021-11-20 3:58 ` Anup Patel 2021-11-19 16:44 ` [PATCH 05/12] RISC-V: defconfigs: Sort CONFIG_SOC_POLARFIRE Palmer Dabbelt 2021-11-19 16:44 ` Palmer Dabbelt 2021-11-20 3:59 ` Anup Patel 2021-11-20 3:59 ` Anup Patel 2021-11-19 16:44 ` [PATCH 06/12] RISC-V: defconfigs: Sort CONFIG_PTP_1588_CLOCK Palmer Dabbelt 2021-11-19 16:44 ` Palmer Dabbelt 2021-11-20 4:00 ` Anup Patel 2021-11-20 4:00 ` Anup Patel 2021-11-19 16:44 ` [PATCH 07/12] RISC-V: defconfigs: Sort CONFIG_MMC Palmer Dabbelt 2021-11-19 16:44 ` Palmer Dabbelt 2021-11-20 4:01 ` Anup Patel 2021-11-20 4:01 ` Anup Patel 2021-11-19 16:44 ` [PATCH 08/12] RISC-V: defconfigs: Sort CONFIG_SURFACE_PLATFORMS Palmer Dabbelt 2021-11-19 16:44 ` Palmer Dabbelt 2021-11-20 4:02 ` Anup Patel 2021-11-20 4:02 ` Anup Patel 2021-11-19 16:44 ` [PATCH 09/12] RISC-V: defconfigs: Sort CONFIG_BLK_DEV_BSG Palmer Dabbelt 2021-11-19 16:44 ` Palmer Dabbelt 2021-11-20 4:04 ` Anup Patel 2021-11-20 4:04 ` Anup Patel 2021-11-19 16:44 ` [PATCH 10/12] RISC-V: defconfigs: Remove redundant CONFIG_POWER_RESET Palmer Dabbelt 2021-11-19 16:44 ` Palmer Dabbelt 2021-11-20 4:04 ` Anup Patel 2021-11-20 4:04 ` Anup Patel 2021-11-19 16:44 ` [PATCH 11/12] RISC-V: defconfigs: Remove redundant CONFIG_EFI=y Palmer Dabbelt 2021-11-19 16:44 ` Palmer Dabbelt 2021-11-20 4:05 ` Anup Patel 2021-11-20 4:05 ` Anup Patel 2021-11-19 16:44 ` [PATCH 12/12] RISC-V: defconfigs: Remove redundant K210 DT source Palmer Dabbelt 2021-11-19 16:44 ` Palmer Dabbelt 2021-11-20 4:07 ` Anup Patel 2021-11-20 4:07 ` Anup Patel 2021-11-21 23:41 ` Damien Le Moal 2021-11-21 23:41 ` Damien Le Moal 2022-01-06 18:01 ` Palmer Dabbelt 2022-01-06 18:01 ` Palmer Dabbelt 2022-01-07 2:14 ` Damien Le Moal 2022-01-07 2:14 ` Damien Le Moal 2022-01-20 18:19 ` Palmer Dabbelt 2022-01-20 18:19 ` Palmer Dabbelt 2022-01-20 23:33 ` Damien Le Moal 2022-01-20 23:33 ` Damien Le Moal 2021-11-20 4:11 ` [PATCH 0/12] RISC-V: Clean up the defconfigs Anup Patel 2021-11-20 4:11 ` Anup Patel 2021-11-22 2:45 ` Bin Meng 2021-11-22 2:45 ` Bin Meng 2022-01-06 18:01 ` Palmer Dabbelt 2022-01-06 18:01 ` Palmer Dabbelt 2021-11-21 23:47 ` Damien Le Moal 2021-11-21 23:47 ` Damien Le Moal
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