From: Anup Patel <apatel@ventanamicro.com> To: Palmer Dabbelt <palmer@dabbelt.com>, Paul Walmsley <paul.walmsley@sifive.com> Cc: Alexandre Ghiti <alexandre.ghiti@canonical.com>, Atish Patra <atishp@atishpatra.org>, Alistair Francis <Alistair.Francis@wdc.com>, Anup Patel <anup@brainfault.org>, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, Anup Patel <apatel@ventanamicro.com>, Mayuresh Chitale <mchitale@ventanamicro.com> Subject: [PATCH] RISC-V: mm: Fix set_satp_mode() for platform not having Sv57 Date: Tue, 12 Apr 2022 09:03:35 +0530 [thread overview] Message-ID: <20220412033335.1384230-1-apatel@ventanamicro.com> (raw) When Sv57 is not available the satp.MODE test in set_satp_mode() will fail and lead to pgdir re-programming for Sv48. The pgdir re-programming will fail as well due to pre-existing pgdir entry used for Sv57 and as a result kernel fails to boot on RISC-V platform not having Sv57. To fix above issue, we should clear the pgdir memory in set_satp_mode() before re-programming. Fixes: 011f09d12052 ("riscv: mm: Set sv57 on defaultly") Reported-by: Mayuresh Chitale <mchitale@ventanamicro.com> Signed-off-by: Anup Patel <apatel@ventanamicro.com> --- arch/riscv/mm/init.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c index 9535bea8688c..b0793dc0c291 100644 --- a/arch/riscv/mm/init.c +++ b/arch/riscv/mm/init.c @@ -718,6 +718,7 @@ static __init void set_satp_mode(void) if (!check_l4) { disable_pgtable_l5(); check_l4 = true; + memset(early_pg_dir, 0, PAGE_SIZE); goto retry; } disable_pgtable_l4(); -- 2.25.1
WARNING: multiple messages have this Message-ID (diff)
From: Anup Patel <apatel@ventanamicro.com> To: Palmer Dabbelt <palmer@dabbelt.com>, Paul Walmsley <paul.walmsley@sifive.com> Cc: Alexandre Ghiti <alexandre.ghiti@canonical.com>, Atish Patra <atishp@atishpatra.org>, Alistair Francis <Alistair.Francis@wdc.com>, Anup Patel <anup@brainfault.org>, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, Anup Patel <apatel@ventanamicro.com>, Mayuresh Chitale <mchitale@ventanamicro.com> Subject: [PATCH] RISC-V: mm: Fix set_satp_mode() for platform not having Sv57 Date: Tue, 12 Apr 2022 09:03:35 +0530 [thread overview] Message-ID: <20220412033335.1384230-1-apatel@ventanamicro.com> (raw) When Sv57 is not available the satp.MODE test in set_satp_mode() will fail and lead to pgdir re-programming for Sv48. The pgdir re-programming will fail as well due to pre-existing pgdir entry used for Sv57 and as a result kernel fails to boot on RISC-V platform not having Sv57. To fix above issue, we should clear the pgdir memory in set_satp_mode() before re-programming. Fixes: 011f09d12052 ("riscv: mm: Set sv57 on defaultly") Reported-by: Mayuresh Chitale <mchitale@ventanamicro.com> Signed-off-by: Anup Patel <apatel@ventanamicro.com> --- arch/riscv/mm/init.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c index 9535bea8688c..b0793dc0c291 100644 --- a/arch/riscv/mm/init.c +++ b/arch/riscv/mm/init.c @@ -718,6 +718,7 @@ static __init void set_satp_mode(void) if (!check_l4) { disable_pgtable_l5(); check_l4 = true; + memset(early_pg_dir, 0, PAGE_SIZE); goto retry; } disable_pgtable_l4(); -- 2.25.1 _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv
next reply other threads:[~2022-04-12 3:34 UTC|newest] Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-04-12 3:33 Anup Patel [this message] 2022-04-12 3:33 ` [PATCH] RISC-V: mm: Fix set_satp_mode() for platform not having Sv57 Anup Patel 2022-04-15 4:47 ` 潘庆霖 2022-04-15 4:47 ` 潘庆霖 2022-04-15 4:53 ` Anup Patel 2022-04-15 4:53 ` Anup Patel 2022-04-15 5:10 ` 潘庆霖 2022-04-15 5:10 ` 潘庆霖 2022-04-15 5:47 ` Atish Patra 2022-04-15 5:47 ` Atish Patra 2022-04-21 9:30 ` Anup Patel 2022-04-21 9:30 ` Anup Patel 2022-04-21 21:12 ` Palmer Dabbelt 2022-04-21 21:12 ` Palmer Dabbelt
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