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Date: Sun, 27 Apr 2014 12:44:14 -0700 From: Larry Bassel <larry.bassel@...aro.org> To: catalin.marinas@....com, will.deacon@....com Cc: linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, linaro-kernel@...ts.linaro.org, khilman@...aro.org, Larry Bassel <larry.bassel@...aro.org> Subject: [PATCH 3/3] arm64: enable context tracking Make calls to ct_user_enter when the kernel is exited and ct_user_exit when the kernel is entered (in el0_da, el0_ia, el0_svc, el0_irq). These macros expand to function calls which will only work properly if el0_sync and related code has been rearranged (in a previous patch of this series). The calls to ct_user_exit are made after hw debugging has been enabled (enable_dbg). The call to ct_user_enter is made at the end of the kernel_exit macro. Signed-off-by: Kevin Hilman <khilman@...aro.org> Signed-off-by: Larry Bassel <larry.bassel@...aro.org> --- arch/arm64/kernel/entry.S | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/arm64/kernel/entry.S b/arch/arm64/kernel/entry.S index 76b09d8..e949435 100644 --- a/arch/arm64/kernel/entry.S +++ b/arch/arm64/kernel/entry.S @@ -104,6 +104,7 @@ .macro kernel_exit, el, ret = 0 ldp x21, x22, [sp, #S_PC] // load ELR, SPSR .if \el == 0 + ct_user_enter ldr x23, [sp, #S_SP] // load return stack pointer .endif .if \ret @@ -442,6 +443,7 @@ el0_da: enable_dbg // enable interrupts before calling the main handler enable_irq + ct_user_exit mrs x0, far_el1 bic x0, x0, #(0xff << 56) mov x1, x25 @@ -457,6 +459,7 @@ el0_ia: enable_dbg // enable interrupts before calling the main handler enable_irq + ct_user_exit mrs x0, far_el1 orr x1, x25, #1 << 24 // use reserved ISS bit for instruction aborts mov x2, sp @@ -525,6 +528,7 @@ el0_irq_naked: bl trace_hardirqs_off #endif + ct_user_exit irq_handler get_thread_info tsk @@ -647,6 +651,7 @@ el0_svc_naked: // compat entry point isb enable_dbg enable_irq + ct_user_exit get_thread_info tsk ldr x16, [tsk, #TI_FLAGS] // check for syscall tracing -- 1.8.3.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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