[Crash-utility] [PATCH] RISCV64: Add more system properties to the 'mach' command

[Austin Kim]

Currently, 'mach' command displays only basic system properties for 
RISC-V-based vmcores. This commit enhances the mach command by adding 
additional system details, including virtual memory addresses, IRQ stacks, 
and overflow stacks.

(before)
crash> mach
                MACHINE TYPE: riscv64
                 MEMORY SIZE: 4 GB
                        CPUS: 4
             PROCESSOR SPEED: (unknown)
                          HZ: 100
                   PAGE SIZE: 4096
           KERNEL STACK SIZE: 16384

(after)
crash> mach
                MACHINE TYPE: riscv64
                 MEMORY SIZE: 4 GB
                        CPUS: 4
             PROCESSOR SPEED: (unknown)
                          HZ: 100
                   PAGE SIZE: 4096
KERNEL VIRTUAL BASE: ffffffd800000000
KERNEL MODULES BASE: ffffffff01d08000
KERNEL VMALLOC BASE: ffffffc800000000
KERNEL VMEMMAP BASE: ffffffc700000000
           KERNEL STACK SIZE: 16384
     IRQ STACK SIZE: 16384
         IRQ STACKS:
              CPU 0: ffffffc800000000
              CPU 1: ffffffc800008000
              CPU 2: ffffffc800010000
              CPU 3: ffffffc800018000
OVERFLOW STACK SIZE: 4096
    OVERFLOW STACKS:
              CPU 0: ffffffd8fc7433c0
              CPU 1: ffffffd8fc75f3c0
              CPU 2: ffffffd8fc77b3c0
              CPU 3: ffffffd8fc7973c0

Signed-off-by: Austin Kim <austindh....@gmail.com>
---
 riscv64.c | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/riscv64.c b/riscv64.c
index 98bf02a..d934b22 100644
--- a/riscv64.c
+++ b/riscv64.c
@@ -135,6 +135,7 @@ static void riscv64_get_struct_page_size(struct 
machine_specific *ms)
 static void
 riscv64_display_machine_stats(void)
 {
+       int i, pad;
        struct new_utsname *uts;
        char buf[BUFSIZE];
        ulong mhz;
@@ -151,7 +152,31 @@ riscv64_display_machine_stats(void)
                fprintf(fp, "(unknown)\n");
        fprintf(fp, "                     HZ: %d\n", machdep->hz);
        fprintf(fp, "              PAGE SIZE: %d\n", PAGESIZE());
+       fprintf(fp, "KERNEL VIRTUAL BASE: %lx\n", 
machdep->machspec->page_offset);
+       fprintf(fp, "KERNEL MODULES BASE: %lx\n", 
machdep->machspec->modules_vaddr);
+       fprintf(fp, "KERNEL VMALLOC BASE: %lx\n", 
machdep->machspec->vmalloc_start_addr);
+       fprintf(fp, "KERNEL VMEMMAP BASE: %lx\n", 
machdep->machspec->vmemmap_vaddr);
        fprintf(fp, "      KERNEL STACK SIZE: %ld\n", STACKSIZE());
+       if (machdep->machspec->irq_stack_size) {
+               fprintf(fp, "     IRQ STACK SIZE: %ld\n",
+                       machdep->machspec->irq_stack_size);
+               fprintf(fp, "         IRQ STACKS:\n");
+               for (i = 0; i < kt->cpus; i++) {
+                       pad = (i < 10) ? 3 : (i < 100) ? 2 : (i < 1000) ? 1 : 0;
+                       fprintf(fp, "%s           CPU %d: %lx\n", space(pad), i,
+                               machdep->machspec->irq_stacks[i]);
+               }
+       }
+       if (machdep->machspec->overflow_stack_size) {
+               fprintf(fp, "OVERFLOW STACK SIZE: %ld\n",
+                       machdep->machspec->overflow_stack_size);
+               fprintf(fp, "    OVERFLOW STACKS:\n");
+               for (i = 0; i < kt->cpus; i++) {
+                       pad = (i < 10) ? 3 : (i < 100) ? 2 : (i < 1000) ? 1 : 0;
+                       fprintf(fp, "%s           CPU %d: %lx\n", space(pad), i,
+                               machdep->machspec->overflow_stacks[i]);
+               }
+       }
 }
 
 static void
-- 
2.34.1
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