powerpc/fadump: Add a warning when 'fadump_reserve_mem=' is used
With commit 11550dc0a00b ("powerpc/fadump: reuse crashkernel parameter
for fadump memory reservation"), 'fadump_reserve_mem=' parameter is
deprecated in favor of 'crashkernel=' parameter. Add a warning if
'fadump_reserve_mem=' is still used.
Fixes: 11550dc0a00b ("powerpc/fadump: reuse crashkernel parameter for fadump memory reservation")
Suggested-by: Prarit Bhargava <prarit@redhat.com>
Signed-off-by: Hari Bathini <hbathini@linux.vnet.ibm.com>
[mpe: Unsplit long printk strings]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
diff --git a/arch/powerpc/kernel/fadump.c b/arch/powerpc/kernel/fadump.c
index 8a5d0e0..1bdbe0b 100644
--- a/arch/powerpc/kernel/fadump.c
+++ b/arch/powerpc/kernel/fadump.c
@@ -212,6 +212,9 @@ static inline unsigned long fadump_calculate_reserve_size(void)
int ret;
unsigned long long base, size;
+ if (fw_dump.reserve_bootvar)
+ pr_warn("'fadump_reserve_mem=' parameter is deprecated in favor of 'crashkernel=' parameter.\n");
+
/*
* Check if the size is specified through crashkernel= cmdline
* option. If yes, then use that but ignore base as fadump
@@ -220,8 +223,17 @@ static inline unsigned long fadump_calculate_reserve_size(void)
ret = parse_crashkernel(boot_command_line, memblock_phys_mem_size(),
&size, &base);
if (ret == 0 && size > 0) {
+ if (fw_dump.reserve_bootvar)
+ pr_info("Using 'crashkernel=' parameter for memory reservation.\n");
+
fw_dump.reserve_bootvar = (unsigned long)size;
return fw_dump.reserve_bootvar;
+ } else if (fw_dump.reserve_bootvar) {
+ /*
+ * 'fadump_reserve_mem=' is being used to reserve memory
+ * for firmware-assisted dump.
+ */
+ return fw_dump.reserve_bootvar;
}
/* divide by 20 to get 5% of value */
@@ -377,6 +389,19 @@ static int __init early_fadump_param(char *p)
}
early_param("fadump", early_fadump_param);
+/*
+ * Look for fadump_reserve_mem= cmdline option
+ * TODO: Remove references to 'fadump_reserve_mem=' parameter,
+ * the sooner 'crashkernel=' parameter is accustomed to.
+ */
+static int __init early_fadump_reserve_mem(char *p)
+{
+ if (p)
+ fw_dump.reserve_bootvar = memparse(p, &p);
+ return 0;
+}
+early_param("fadump_reserve_mem", early_fadump_reserve_mem);
+
static int register_fw_dump(struct fadump_mem_struct *fdm)
{
int rc, err;