From: Etienne Carriere etienne.carriere@st.com

Add boolean input argument @no_map to helper function fdtdec_add_reserved_memory() to add or not "no-map" property for an added reserved memory node.

Property no-map is used by the Linux kernel to not not map memory in its static memory mapping. It is needed for example for the| consistency of system non-cached memory and to prevent speculative accesses to some firewalled memory.

No functional change. A later change will update to OPTEE library to add no-map property to OP-TEE reserved memory nodes.

Signed-off-by: Etienne Carriere etienne.carriere@st.com Signed-off-by: Patrice Chotard patrice.chotard@st.com ---

Changes in v4: - Reword commit message

Changes in v2: - fix dm fdtdec test and arch/riscv/lib/fdt_fixup.c with fdtdec_add_reserved_memory() new parameter

arch/riscv/lib/fdt_fixup.c | 2 +- include/fdtdec.h | 5 +++-- lib/fdtdec.c | 10 ++++++++-- lib/optee/optee.c | 2 +- test/dm/fdtdec.c | 6 +++--- 5 files changed, 16 insertions(+), 9 deletions(-)

diff --git a/arch/riscv/lib/fdt_fixup.c b/arch/riscv/lib/fdt_fixup.c index 5b2420243f..d02062fd5b 100644 --- a/arch/riscv/lib/fdt_fixup.c +++ b/arch/riscv/lib/fdt_fixup.c @@ -75,7 +75,7 @@ int riscv_fdt_copy_resv_mem_node(const void *src, void *dst) pmp_mem.start = addr; pmp_mem.end = addr + size - 1; err = fdtdec_add_reserved_memory(dst, basename, &pmp_mem, - &phandle); + &phandle, false); if (err < 0 && err != -FDT_ERR_EXISTS) { log_err("failed to add reserved memory: %d\n", err); return err; diff --git a/include/fdtdec.h b/include/fdtdec.h index 152eb07b9e..62d1660973 100644 --- a/include/fdtdec.h +++ b/include/fdtdec.h @@ -1029,7 +1029,7 @@ static inline int fdtdec_set_phandle(void *blob, int node, uint32_t phandle) * }; * uint32_t phandle; * - * fdtdec_add_reserved_memory(fdt, "framebuffer", &fb, &phandle); + * fdtdec_add_reserved_memory(fdt, "framebuffer", &fb, &phandle, false); * * This results in the following subnode being added to the top-level * /reserved-memory node: @@ -1056,11 +1056,12 @@ static inline int fdtdec_set_phandle(void *blob, int node, uint32_t phandle) * @param carveout information about the carveout region * @param phandlep return location for the phandle of the carveout region * can be NULL if no phandle should be added + * @param no_map add "no-map" property if true * @return 0 on success or a negative error code on failure */ int fdtdec_add_reserved_memory(void *blob, const char *basename, const struct fdt_memory *carveout, - uint32_t *phandlep); + uint32_t *phandlep, bool no_map);

/** * fdtdec_get_carveout() - reads a carveout from an FDT diff --git a/lib/fdtdec.c b/lib/fdtdec.c index d3b22ec323..b3cbe1223e 100644 --- a/lib/fdtdec.c +++ b/lib/fdtdec.c @@ -1319,7 +1319,7 @@ static int fdtdec_init_reserved_memory(void *blob)

int fdtdec_add_reserved_memory(void *blob, const char *basename, const struct fdt_memory *carveout, - uint32_t *phandlep) + uint32_t *phandlep, bool no_map) { fdt32_t cells[4] = {}, *ptr = cells; uint32_t upper, lower, phandle; @@ -1419,6 +1419,12 @@ int fdtdec_add_reserved_memory(void *blob, const char *basename, if (err < 0) return err;

+ if (no_map) { + err = fdt_setprop(blob, node, "no-map", NULL, 0); + if (err < 0) + return err; + } + /* return the phandle for the new node for the caller to use */ if (phandlep) *phandlep = phandle; @@ -1484,7 +1490,7 @@ int fdtdec_set_carveout(void *blob, const char *node, const char *prop_name, fdt32_t value; void *prop;

- err = fdtdec_add_reserved_memory(blob, name, carveout, &phandle); + err = fdtdec_add_reserved_memory(blob, name, carveout, &phandle, false); if (err < 0) { debug("failed to add reserved memory: %d\n", err); return err; diff --git a/lib/optee/optee.c b/lib/optee/optee.c index 457d4cca8a..963c2ff430 100644 --- a/lib/optee/optee.c +++ b/lib/optee/optee.c @@ -192,7 +192,7 @@ int optee_copy_fdt_nodes(const void *old_blob, void *new_blob) ret = fdtdec_add_reserved_memory(new_blob, nodename, &carveout, - NULL); + NULL, false); free(oldname);

if (ret < 0) diff --git a/test/dm/fdtdec.c b/test/dm/fdtdec.c index 716993f706..4119003041 100644 --- a/test/dm/fdtdec.c +++ b/test/dm/fdtdec.c @@ -80,7 +80,7 @@ static int dm_test_fdtdec_add_reserved_memory(struct unit_test_state *uts) resv.start = 0x1000; resv.end = 0x1fff; ut_assertok(fdtdec_add_reserved_memory(blob, "rsvd_region", - &resv, &phandle)); + &resv, &phandle, false));

/* Test /reserve-memory and its subnode should exist */ parent = fdt_path_offset(blob, "/reserved-memory"); @@ -101,7 +101,7 @@ static int dm_test_fdtdec_add_reserved_memory(struct unit_test_state *uts) resv.start = 0x2000; resv.end = 0x2fff; ut_assertok(fdtdec_add_reserved_memory(blob, "rsvd_region1", - &resv, &phandle1)); + &resv, &phandle1, false)); subnode = fdt_path_offset(blob, "/reserved-memory/rsvd_region1"); ut_assert(subnode > 0);

@@ -115,7 +115,7 @@ static int dm_test_fdtdec_add_reserved_memory(struct unit_test_state *uts) resv.start = 0x1000; resv.end = 0x1fff; ut_assertok(fdtdec_add_reserved_memory(blob, "rsvd_region2", - &resv, &phandle1)); + &resv, &phandle1, false)); subnode = fdt_path_offset(blob, "/reserved-memory/rsvd_region2"); ut_assert(subnode < 0);