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author | Paolo Bonzini <pbonzini@redhat.com> | 2021-02-12 19:23:44 +0300 |
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committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-02-12 19:23:44 +0300 |
commit | 8c6e67bec3192f16fa624203c8131e10cc4814ba (patch) | |
tree | 533b140ab6bb926f5ec35f8e42d5a99590e0d945 /arch/riscv/mm/init.c | |
parent | 7137b7ae6f20076a1e05546db61f9fb3d3f9e97d (diff) | |
parent | c93199e93e1232b7220482dffa05b7a32a195fe8 (diff) | |
download | linux-8c6e67bec3192f16fa624203c8131e10cc4814ba.tar.xz |
Merge tag 'kvmarm-5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD
KVM/arm64 updates for Linux 5.12
- Make the nVHE EL2 object relocatable, resulting in much more
maintainable code
- Handle concurrent translation faults hitting the same page
in a more elegant way
- Support for the standard TRNG hypervisor call
- A bunch of small PMU/Debug fixes
- Allow the disabling of symbol export from assembly code
- Simplification of the early init hypercall handling
Diffstat (limited to 'arch/riscv/mm/init.c')
-rw-r--r-- | arch/riscv/mm/init.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c index bf5379135e39..7cd4993f4ff2 100644 --- a/arch/riscv/mm/init.c +++ b/arch/riscv/mm/init.c @@ -157,9 +157,10 @@ disable: void __init setup_bootmem(void) { phys_addr_t mem_start = 0; - phys_addr_t start, end = 0; + phys_addr_t start, dram_end, end = 0; phys_addr_t vmlinux_end = __pa_symbol(&_end); phys_addr_t vmlinux_start = __pa_symbol(&_start); + phys_addr_t max_mapped_addr = __pa(~(ulong)0); u64 i; /* Find the memory region containing the kernel */ @@ -181,7 +182,18 @@ void __init setup_bootmem(void) /* Reserve from the start of the kernel to the end of the kernel */ memblock_reserve(vmlinux_start, vmlinux_end - vmlinux_start); - max_pfn = PFN_DOWN(memblock_end_of_DRAM()); + dram_end = memblock_end_of_DRAM(); + + /* + * memblock allocator is not aware of the fact that last 4K bytes of + * the addressable memory can not be mapped because of IS_ERR_VALUE + * macro. Make sure that last 4k bytes are not usable by memblock + * if end of dram is equal to maximum addressable memory. + */ + if (max_mapped_addr == (dram_end - 1)) + memblock_set_current_limit(max_mapped_addr - 4096); + + max_pfn = PFN_DOWN(dram_end); max_low_pfn = max_pfn; dma32_phys_limit = min(4UL * SZ_1G, (unsigned long)PFN_PHYS(max_low_pfn)); set_max_mapnr(max_low_pfn); |