[PATCH 11/17] psci: use __pa_function for cpu_resume

Sami Tolvanen
2021-03-12T00:50:22Z

With CONFIG_CFI_CLANG, the compiler replaces function pointers with
jump table addresses, which results in __pa_symbol returning the
physical address of the jump table entry. As the jump table contains
an immediate jump to an EL1 virtual address, this typically won't
work as intended. Use __pa_function instead to get the address to
cpu_resume.

Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
---
drivers/firmware/psci/psci.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/firmware/psci/psci.c b/drivers/firmware/psci/psci.c
index f5fc429cae3f..facd3cce3244 100644
--- a/drivers/firmware/psci/psci.c
+++ b/drivers/firmware/psci/psci.c
@@ -326,7 +326,7 @@ static int psci_suspend_finisher(unsigned long state)
{
u32 power_state = state;

- return psci_ops.cpu_suspend(power_state, __pa_symbol(cpu_resume));
+ return psci_ops.cpu_suspend(power_state, __pa_function(cpu_resume));
}

int psci_cpu_suspend_enter(u32 state)
@@ -345,7 +345,7 @@ int psci_cpu_suspend_enter(u32 state)
static int psci_system_suspend(unsigned long unused)
{
return invoke_psci_fn(PSCI_FN_NATIVE(1_0, SYSTEM_SUSPEND),
- __pa_symbol(cpu_resume), 0, 0);
+ __pa_function(cpu_resume), 0, 0);
}

static int psci_system_suspend_enter(suspend_state_t state)
--
2.31.0.rc2.261.g7f71774620-goog