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| author | Zong Li <zong.li@sifive.com> | 2020-01-02 04:12:39 +0100 |
|---|---|---|
| committer | Palmer Dabbelt <palmerdabbelt@google.com> | 2020-01-23 19:40:06 +0100 |
| commit | 6435f773d81f02193228685a7e3fe65c983c5de0 (patch) | |
| tree | 52a675321c1cc40e197a7a48703708471c474d15 /arch/riscv/Kconfig | |
| parent | riscv: keep 32-bit kernel to 32-bit phys_addr_t (diff) | |
| download | linux-6435f773d81f02193228685a7e3fe65c983c5de0.tar.xz linux-6435f773d81f02193228685a7e3fe65c983c5de0.zip | |
riscv: mm: add support for CONFIG_DEBUG_VIRTUAL
This patch implements CONFIG_DEBUG_VIRTUAL to do additional checks on
virt_to_phys and __pa_symbol calls. virt_to_phys used for linear mapping
check, and __pa_symbol used for kernel symbol check. In current RISC-V,
kernel image maps to linear mapping area. If CONFIG_DEBUG_VIRTUAL is
disable, these two functions calculate the offset on the address feded
directly without any checks.
The result of test_debug_virtual as follows:
[ 0.358456] ------------[ cut here ]------------
[ 0.358738] virt_to_phys used for non-linear address: (____ptrval____) (0xffffffd000000000)
[ 0.359174] WARNING: CPU: 0 PID: 1 at arch/riscv/mm/physaddr.c:16 __virt_to_phys+0x3c/0x50
[ 0.359409] Modules linked in:
[ 0.359630] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.5.0-rc3-00002-g5133c5c0ca13 #57
[ 0.359861] epc: ffffffe000253d1a ra : ffffffe000253d1a sp : ffffffe03aa87da0
[ 0.360019] gp : ffffffe000ae03b0 tp : ffffffe03aa88000 t0 : ffffffe000af2660
[ 0.360175] t1 : 0000000000000064 t2 : 00000000000000b7 s0 : ffffffe03aa87dc0
[ 0.360330] s1 : ffffffd000000000 a0 : 000000000000004f a1 : 0000000000000000
[ 0.360492] a2 : 0000000000000000 a3 : 0000000000000000 a4 : ffffffe000a84358
[ 0.360672] a5 : 0000000000000000 a6 : 0000000000000000 a7 : 0000000000000000
[ 0.360876] s2 : ffffffe000ae0600 s3 : ffffffe00000fc7c s4 : ffffffe0000224b0
[ 0.361067] s5 : ffffffe000030890 s6 : ffffffe000022470 s7 : 0000000000000008
[ 0.361267] s8 : ffffffe0000002c4 s9 : ffffffe000ae0640 s10: ffffffe000ae0630
[ 0.361453] s11: 0000000000000000 t3 : 0000000000000000 t4 : 000000000001e6d0
[ 0.361636] t5 : ffffffe000ae0a18 t6 : ffffffe000aee54e
[ 0.361806] status: 0000000000000120 badaddr: 0000000000000000 cause: 0000000000000003
[ 0.362056] ---[ end trace aec0bf78d4978122 ]---
[ 0.362404] PA: 0xfffffff080200000 for VA: 0xffffffd000000000
[ 0.362607] PA: 0x00000000baddd2d0 for VA: 0xffffffe03abdd2d0
Signed-off-by: Zong Li <zong.li@sifive.com>
Reviewed-by: Paul Walmsley <paul.walmsley@sifive.com>
Tested-by: Paul Walmsley <paul.walmsley@sifive.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
Diffstat (limited to 'arch/riscv/Kconfig')
| -rw-r--r-- | arch/riscv/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index b04692fd4a63..73f029eae0cc 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -55,6 +55,7 @@ config RISCV select GENERIC_ARCH_TOPOLOGY if SMP select ARCH_HAS_PTE_SPECIAL select ARCH_HAS_MMIOWB + select ARCH_HAS_DEBUG_VIRTUAL select HAVE_EBPF_JIT if 64BIT select EDAC_SUPPORT select ARCH_HAS_GIGANTIC_PAGE |