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authorLinus Torvalds <torvalds@linux-foundation.org>2021-02-06 15:18:10 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2021-02-06 15:18:10 -0800
commitf7455e5d6897f275aaf5b6d964103ba295ac0cdd (patch)
tree77cee20f69196cca38bff1600d3bb986d6590bb5
parentf06279ea1908b9cd2d22645dc6d492e612b82744 (diff)
parentde5f4b8f634beacf667e6eff334522601dd03b59 (diff)
downloadlinux-f7455e5d6897f275aaf5b6d964103ba295ac0cdd.tar.bz2
Merge tag 'riscv-for-linus-5.11-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
Pull RISC-V fixes from Palmer Dabbelt: "A handful of fixes for this week: - A fix to avoid evalating the VA twice in virt_addr_valid, which fixes some WARNs under DEBUG_VIRTUAL. - Two fixes related to STRICT_KERNEL_RWX: one that fixes some permissions when strict is disabled, and one to fix some alignment issues when strict is enabled. - A fix to disallow the selection of MAXPHYSMEM_2GB on RV32, which isn't valid any more but may still show up in some oldconfigs. We still have the HiFive Unleashed ethernet phy reset regression, so there will likely be something coming next week" * tag 'riscv-for-linus-5.11-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux: RISC-V: Define MAXPHYSMEM_1GB only for RV32 riscv: Align on L1_CACHE_BYTES when STRICT_KERNEL_RWX RISC-V: Fix .init section permission update riscv: virt_addr_valid must check the address belongs to linear mapping
-rw-r--r--arch/riscv/Kconfig2
-rw-r--r--arch/riscv/include/asm/page.h5
-rw-r--r--arch/riscv/include/asm/set_memory.h6
-rw-r--r--arch/riscv/kernel/setup.c4
4 files changed, 12 insertions, 5 deletions
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index e9e2c1f0a690..e0a34eb5ed3b 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -252,8 +252,10 @@ choice
default MAXPHYSMEM_128GB if 64BIT && CMODEL_MEDANY
config MAXPHYSMEM_1GB
+ depends on 32BIT
bool "1GiB"
config MAXPHYSMEM_2GB
+ depends on 64BIT && CMODEL_MEDLOW
bool "2GiB"
config MAXPHYSMEM_128GB
depends on 64BIT && CMODEL_MEDANY
diff --git a/arch/riscv/include/asm/page.h b/arch/riscv/include/asm/page.h
index 2d50f76efe48..64a675c5c30a 100644
--- a/arch/riscv/include/asm/page.h
+++ b/arch/riscv/include/asm/page.h
@@ -135,7 +135,10 @@ extern phys_addr_t __phys_addr_symbol(unsigned long x);
#endif /* __ASSEMBLY__ */
-#define virt_addr_valid(vaddr) (pfn_valid(virt_to_pfn(vaddr)))
+#define virt_addr_valid(vaddr) ({ \
+ unsigned long _addr = (unsigned long)vaddr; \
+ (unsigned long)(_addr) >= PAGE_OFFSET && pfn_valid(virt_to_pfn(_addr)); \
+})
#define VM_DATA_DEFAULT_FLAGS VM_DATA_FLAGS_NON_EXEC
diff --git a/arch/riscv/include/asm/set_memory.h b/arch/riscv/include/asm/set_memory.h
index 211eb8244a45..8b80c80c7f1a 100644
--- a/arch/riscv/include/asm/set_memory.h
+++ b/arch/riscv/include/asm/set_memory.h
@@ -32,14 +32,14 @@ bool kernel_page_present(struct page *page);
#endif /* __ASSEMBLY__ */
-#ifdef CONFIG_ARCH_HAS_STRICT_KERNEL_RWX
+#ifdef CONFIG_STRICT_KERNEL_RWX
#ifdef CONFIG_64BIT
#define SECTION_ALIGN (1 << 21)
#else
#define SECTION_ALIGN (1 << 22)
#endif
-#else /* !CONFIG_ARCH_HAS_STRICT_KERNEL_RWX */
+#else /* !CONFIG_STRICT_KERNEL_RWX */
#define SECTION_ALIGN L1_CACHE_BYTES
-#endif /* CONFIG_ARCH_HAS_STRICT_KERNEL_RWX */
+#endif /* CONFIG_STRICT_KERNEL_RWX */
#endif /* _ASM_RISCV_SET_MEMORY_H */
diff --git a/arch/riscv/kernel/setup.c b/arch/riscv/kernel/setup.c
index 3fa3f26dde85..c7c0655dd45b 100644
--- a/arch/riscv/kernel/setup.c
+++ b/arch/riscv/kernel/setup.c
@@ -293,6 +293,8 @@ void free_initmem(void)
unsigned long init_begin = (unsigned long)__init_begin;
unsigned long init_end = (unsigned long)__init_end;
- set_memory_rw_nx(init_begin, (init_end - init_begin) >> PAGE_SHIFT);
+ if (IS_ENABLED(CONFIG_STRICT_KERNEL_RWX))
+ set_memory_rw_nx(init_begin, (init_end - init_begin) >> PAGE_SHIFT);
+
free_initmem_default(POISON_FREE_INITMEM);
}