From: Shannon Zhao <shannon.zhao@xxxxxxxxxx>
Add a new function to parse DT parameters for Xen specific UEFI just
like the way for normal UEFI. Then it could reuse the existing codes.
Signed-off-by: Shannon Zhao <shannon.zhao@xxxxxxxxxx>
---
drivers/firmware/efi/efi.c | 45 ++++++++++++++++++++++++++++++++++++++-------
1 file changed, 38 insertions(+), 7 deletions(-)
diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c
index 027ca21..2dbc2ac 100644
--- a/drivers/firmware/efi/efi.c
+++ b/drivers/firmware/efi/efi.c
@@ -24,6 +24,7 @@
#include <linux/of_fdt.h>
#include <linux/io.h>
#include <linux/platform_device.h>
+#include <xen/xen.h>
struct efi __read_mostly efi = {
.mps = EFI_INVALID_TABLE_ADDR,
@@ -498,12 +499,14 @@ device_initcall(efi_load_efivars);
FIELD_SIZEOF(struct efi_fdt_params, field) \
}
-static __initdata struct {
+struct params {
const char name[32];
const char propname[32];
int offset;
int size;
-} dt_params[] = {
+};
+
+static struct params fdt_params[] __initdata = {
UEFI_PARAM("System Table", "linux,uefi-system-table", system_table),
UEFI_PARAM("MemMap Address", "linux,uefi-mmap-start", mmap),
UEFI_PARAM("MemMap Size", "linux,uefi-mmap-size", mmap_size),
@@ -511,6 +514,14 @@ static __initdata struct {
UEFI_PARAM("MemMap Desc. Version", "linux,uefi-mmap-desc-ver", desc_ver)
};
+static struct params xen_fdt_params[] __initdata = {
+ UEFI_PARAM("System Table", "xen,uefi-system-table", system_table),
+ UEFI_PARAM("MemMap Address", "xen,uefi-mmap-start", mmap),
+ UEFI_PARAM("MemMap Size", "xen,uefi-mmap-size", mmap_size),
+ UEFI_PARAM("MemMap Desc. Size", "xen,uefi-mmap-desc-size", desc_size),
+ UEFI_PARAM("MemMap Desc. Version", "xen,uefi-mmap-desc-ver", desc_ver)
+};
+
struct param_info {
int found;
void *params;
@@ -520,15 +531,28 @@ static int __init fdt_find_uefi_params(unsigned long node, const char *uname,
int depth, void *data)
{
struct param_info *info = data;
+ struct params *dt_params;
+ unsigned int size;
const void *prop;
void *dest;
u64 val;
int i, len;
- if (depth != 1 || strcmp(uname, "chosen") != 0)
- return 0;
+ if (efi_enabled(EFI_PARAVIRT)) {
+ if (depth != 2 || strcmp(uname, "uefi") != 0)
+ return 0;
- for (i = 0; i < ARRAY_SIZE(dt_params); i++) {
+ dt_params = xen_fdt_params;
+ size = ARRAY_SIZE(xen_fdt_params);
+ } else {
+ if (depth != 1 || strcmp(uname, "chosen") != 0)
+ return 0;
+
+ dt_params = fdt_params;
+ size = ARRAY_SIZE(fdt_params);
+ }
+
+ for (i = 0; i < size; i++) {
prop = of_get_flat_dt_prop(node, dt_params[i].propname, &len);
if (!prop)
return 0;
@@ -552,6 +576,7 @@ static int __init fdt_find_uefi_params(unsigned long node, const char *uname,
int __init efi_get_fdt_params(struct efi_fdt_params *params)
{
struct param_info info;
+ struct params *dt_params;
int ret;
pr_info("Getting EFI parameters from FDT:\n");
@@ -559,12 +584,18 @@ int __init efi_get_fdt_params(struct efi_fdt_params *params)
info.found = 0;
info.params = params;
+ if (efi_enabled(EFI_PARAVIRT))
+ dt_params = xen_fdt_params;
+ else
+ dt_params = fdt_params;
+
ret = of_scan_flat_dt(fdt_find_uefi_params, &info);
- if (!info.found)
+ if (!info.found) {
pr_info("UEFI not found.\n");
- else if (!ret)
+ } else if (!ret) {
pr_err("Can't find '%s' in device tree!\n",
dt_params[info.found].name);
+ }
return ret;
}
--
2.0.4
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