[kvm-unit-tests PATCH v5 09/29] powerpc: Fix interrupt stack alignment
From: Nicholas Piggin <npiggin@gmail.com>
Date: 2023-12-16 13:51:29
Also in:
kvm
Subsystem:
library code, the rest · Maintainers:
Andrew Morton, Linus Torvalds
ppc64 requires the stack to be 16-byte aligned but the interrupt stack frame has 8-byte aligned size. Add padding to fix. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> --- lib/powerpc/setup.c | 3 +++ lib/ppc64/asm/ptrace.h | 1 + 2 files changed, 4 insertions(+)
diff --git a/lib/powerpc/setup.c b/lib/powerpc/setup.c
index 1be4c030..d98f66fa 100644
--- a/lib/powerpc/setup.c
+++ b/lib/powerpc/setup.c@@ -18,6 +18,7 @@ #include <argv.h> #include <asm/setup.h> #include <asm/page.h> +#include <asm/ptrace.h> #include <asm/hcall.h> #include "io.h"
@@ -195,6 +196,8 @@ void setup(const void *fdt) freemem += initrd_size; } + assert(STACK_INT_FRAME_SIZE % 16 == 0); + /* call init functions */ cpu_init();
diff --git a/lib/ppc64/asm/ptrace.h b/lib/ppc64/asm/ptrace.h
index 076c9d9c..12de7499 100644
--- a/lib/ppc64/asm/ptrace.h
+++ b/lib/ppc64/asm/ptrace.h@@ -14,6 +14,7 @@ struct pt_regs { unsigned long xer; unsigned long ccr; unsigned long trap; + unsigned long _pad; /* stack must be 16-byte aligned */ }; #define STACK_INT_FRAME_SIZE (sizeof(struct pt_regs) + \
--
2.42.0