Add a new linux,drconf-usable-memory property to the device tree. This property
stores the usable memory regions for kexec/kdump kernel. The other changes to
kexec-tools which do not affect the kernel are not attached here. These are
the changes to kexec-tools. Patch 1/2 are the changes in kernel.
Signed-off-by: Chandru Siddalingappa <[EMAIL PROTECTED]>
---
kexec/arch/ppc64/fs2dt.c | 72 +++++++++++++++++++++++++++++++++++++
1 file changed, 72 insertions(+)
--- kexec-tools-testing-orig/kexec/arch/ppc64/fs2dt.c 2008-08-14
14:41:52.000000000 +0530
+++ kexec-tools-testing/kexec/arch/ppc64/fs2dt.c 2008-08-14
14:46:15.000000000 +0530
@@ -122,6 +122,74 @@ static unsigned propnum(const char *name
return offset;
}
+static void add_dyn_reconf_usable_mem_property(int fd)
+{
+ char fname[MAXPATH], *bname;
+ uint64_t buf[32];
+ uint64_t ranges[2*MAX_MEMORY_RANGES];
+ uint64_t base, end, loc_base, loc_end;
+ int range, rlen = 0, i;
+ int rngs_cnt, tmp_indx;
+
+ strcpy(fname, pathname);
+ bname = strrchr(fname, '/');
+ bname[0] = '\0';
+ bname = strrchr(fname, '/');
+ if (strncmp(bname, "/ibm,dynamic-reconfiguration-memory", 36))
+ return;
+
+ if (lseek(fd, 4, SEEK_SET) < 0)
+ die("unrecoverable error: error seeking in \"%s\": %s\n",
+ pathname, strerror(errno));
+
+ rlen = 0;
+ for (i = 0; i < num_of_lmbs; i++) {
+ if (read(fd, buf, 24) < 0)
+ die("unrecoverable error: error reading \"%s\": %s\n",
+ pathname, strerror(errno));
+
+ base = (uint64_t) buf[0];
+ end = base + lmb_size;
+ if (~0ULL - base < end)
+ die("unrecoverable error: mem property overflow\n");
+
+ tmp_indx = rlen++;
+
+ rngs_cnt = 0;
+ for (range = 0; range < usablemem_rgns.size; range++) {
+ loc_base = usablemem_rgns.ranges[range].start;
+ loc_end = usablemem_rgns.ranges[range].end;
+ if (loc_base >= base && loc_end <= end) {
+ ranges[rlen++] = loc_base;
+ ranges[rlen++] = loc_end - loc_base;
+ rngs_cnt++;
+ } else if (base < loc_end && end > loc_base) {
+ if (loc_base < base)
+ loc_base = base;
+ if (loc_end > end)
+ loc_end = end;
+ ranges[rlen++] = loc_base;
+ ranges[rlen++] = loc_end - loc_base;
+ rngs_cnt++;
+ }
+ }
+ /* Store the count of (base, size) duple */
+ ranges[tmp_indx] = rngs_cnt;
+ }
+
+ rlen = rlen * sizeof(uint64_t);
+ /*
+ * Add linux,drconf-usable-memory property.
+ */
+ *dt++ = 3;
+ *dt++ = rlen;
+ *dt++ = propnum("linux,drconf-usable-memory");
+ if ((rlen >= 8) && ((unsigned long)dt & 0x4))
+ dt++;
+ memcpy(dt, &ranges, rlen);
+ dt += (rlen + 3)/4;
+}
+
static void add_usable_mem_property(int fd, int len)
{
char fname[MAXPATH], *bname;
@@ -267,6 +335,10 @@ static void putprops(char *fn, struct di
dt += (len + 3)/4;
if (!strcmp(dp->d_name, "reg") && usablemem_rgns.size)
add_usable_mem_property(fd, len);
+ if (!strcmp(dp->d_name, "ibm,dynamic-memory") &&
+ usablemem_rgns.size)
+ add_dyn_reconf_usable_mem_property(fd);
+
close(fd);
}
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