[PATCH v2] powerpc/32s: Disable VMAP stack which CONFIG_ADB_PMU

low_sleep_handler() can't restore the context from virtual
stack because the stack can hardly be accessed with MMU OFF.

For now, disable VMAP stack when CONFIG_ADB_PMU is selected.

Reported-by: Giuseppe Sacco <redacted>
Fixes: cd08f109e262 ("powerpc/32s: Enable CONFIG_VMAP_STACK")
Signed-off-by: Christophe Leroy <redacted>
---
v2: Argh, went too quick. CONFIG_ADB_PMU ==> ADB_PMU
---
 arch/powerpc/platforms/Kconfig.cputype | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype
index 87737ec86d39..1dc9d3c81872 100644
--- a/arch/powerpc/platforms/Kconfig.cputype
+++ b/arch/powerpc/platforms/Kconfig.cputype

@@ -36,7 +36,7 @@ config PPC_BOOK3S_6xx
 	select PPC_HAVE_PMU_SUPPORT
 	select PPC_HAVE_KUEP
 	select PPC_HAVE_KUAP
-	select HAVE_ARCH_VMAP_STACK
+	select HAVE_ARCH_VMAP_STACK if !ADB_PMU
 
 config PPC_BOOK3S_601
 	bool "PowerPC 601"

-- 
2.25.0

On Thu, 27 Aug 2020 18:30:27 +0000 (UTC), Christophe Leroy wrote:

low_sleep_handler() can't restore the context from virtual
stack because the stack can hardly be accessed with MMU OFF.

For now, disable VMAP stack when CONFIG_ADB_PMU is selected.

Applied to powerpc/fixes.

[1/1] powerpc/32s: Disable VMAP stack which CONFIG_ADB_PMU
      https://git.kernel.org/powerpc/c/4a133eb351ccc275683ad49305d0b04dde903733

cheers