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riscv: Improve virtual kernel memory layout dump

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With the arrival of sv48 and its large address space, it would be
cumbersome to statically define the unit size to use to print the different
portions of the virtual memory layout: instead, determine it dynamically.

Signed-off-by: Alexandre Ghiti <alexandre.ghiti@canonical.com>
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
This commit is contained in:
Alexandre Ghiti 2021-12-06 11:46:54 +01:00 committed by Palmer Dabbelt
parent 35d33c76d6
commit 26b8f69edd
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GPG key ID: 2E1319F35FBB1889
1 changed files with 51 additions and 15 deletions
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66
arch/riscv/mm/init.c
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@ -76,38 +76,74 @@ static void __init zone_sizes_init(void)
}
#if defined(CONFIG_MMU) && defined(CONFIG_DEBUG_VM)
#define LOG2_SZ_1K ilog2(SZ_1K)
#define LOG2_SZ_1M ilog2(SZ_1M)
#define LOG2_SZ_1G ilog2(SZ_1G)
#define LOG2_SZ_1T ilog2(SZ_1T)
static inline void print_mlk(char *name, unsigned long b, unsigned long t)
{
pr_notice("%12s : 0x%08lx - 0x%08lx (%4ld kB)\n", name, b, t,
(((t) - (b)) >> 10));
(((t) - (b)) >> LOG2_SZ_1K));
}
static inline void print_mlm(char *name, unsigned long b, unsigned long t)
{
pr_notice("%12s : 0x%08lx - 0x%08lx (%4ld MB)\n", name, b, t,
(((t) - (b)) >> 20));
(((t) - (b)) >> LOG2_SZ_1M));
}
static inline void print_mlg(char *name, unsigned long b, unsigned long t)
{
pr_notice("%12s : 0x%08lx - 0x%08lx (%4ld GB)\n", name, b, t,
(((t) - (b)) >> LOG2_SZ_1G));
}
#ifdef CONFIG_64BIT
static inline void print_mlt(char *name, unsigned long b, unsigned long t)
{
pr_notice("%12s : 0x%08lx - 0x%08lx (%4ld TB)\n", name, b, t,
(((t) - (b)) >> LOG2_SZ_1T));
}
#else
#define print_mlt(n, b, t) do {} while (0)
#endif
static inline void print_ml(char *name, unsigned long b, unsigned long t)
{
unsigned long diff = t - b;
if (IS_ENABLED(CONFIG_64BIT) && (diff >> LOG2_SZ_1T) >= 10)
print_mlt(name, b, t);
else if ((diff >> LOG2_SZ_1G) >= 10)
print_mlg(name, b, t);
else if ((diff >> LOG2_SZ_1M) >= 10)
print_mlm(name, b, t);
else
print_mlk(name, b, t);
}
static void __init print_vm_layout(void)
{
pr_notice("Virtual kernel memory layout:\n");
print_mlk("fixmap", (unsigned long)FIXADDR_START,
(unsigned long)FIXADDR_TOP);
print_mlm("pci io", (unsigned long)PCI_IO_START,
(unsigned long)PCI_IO_END);
print_mlm("vmemmap", (unsigned long)VMEMMAP_START,
(unsigned long)VMEMMAP_END);
print_mlm("vmalloc", (unsigned long)VMALLOC_START,
(unsigned long)VMALLOC_END);
print_mlm("lowmem", (unsigned long)PAGE_OFFSET,
(unsigned long)high_memory);
print_ml("fixmap", (unsigned long)FIXADDR_START,
(unsigned long)FIXADDR_TOP);
print_ml("pci io", (unsigned long)PCI_IO_START,
(unsigned long)PCI_IO_END);
print_ml("vmemmap", (unsigned long)VMEMMAP_START,
(unsigned long)VMEMMAP_END);
print_ml("vmalloc", (unsigned long)VMALLOC_START,
(unsigned long)VMALLOC_END);
print_ml("lowmem", (unsigned long)PAGE_OFFSET,
(unsigned long)high_memory);
if (IS_ENABLED(CONFIG_64BIT)) {
#ifdef CONFIG_KASAN
print_mlm("kasan", KASAN_SHADOW_START, KASAN_SHADOW_END);
print_ml("kasan", KASAN_SHADOW_START, KASAN_SHADOW_END);
#endif
print_mlm("kernel", (unsigned long)KERNEL_LINK_ADDR,
(unsigned long)ADDRESS_SPACE_END);
print_ml("kernel", (unsigned long)KERNEL_LINK_ADDR,
(unsigned long)ADDRESS_SPACE_END);
}
}
#else