From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:59345) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aTogr-0000SV-Ce for qemu-devel@nongnu.org; Thu, 11 Feb 2016 05:41:38 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1aTogp-0004sN-UQ for qemu-devel@nongnu.org; Thu, 11 Feb 2016 05:41:37 -0500 Received: from mail-wm0-x229.google.com ([2a00:1450:400c:c09::229]:35435) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aTogp-0004sJ-Kp for qemu-devel@nongnu.org; Thu, 11 Feb 2016 05:41:35 -0500 Received: by mail-wm0-x229.google.com with SMTP id c200so66683078wme.0 for ; Thu, 11 Feb 2016 02:41:35 -0800 (PST) From: =?UTF-8?q?Alex=20Benn=C3=A9e?= Date: Thu, 11 Feb 2016 10:41:05 +0000 Message-Id: <1455187265-26631-10-git-send-email-alex.bennee@linaro.org> In-Reply-To: <1455187265-26631-1-git-send-email-alex.bennee@linaro.org> References: <1455187265-26631-1-git-send-email-alex.bennee@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Subject: [Qemu-devel] [PATCH v6 9/9] cputlb: modernise the debug support List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Peter Crosthwaite , dgilbert@redhat.com, crosthwaitepeter@gmail.com, pbonzini@redhat.com, =?UTF-8?q?Alex=20Benn=C3=A9e?= , aurelien@aurel32.net, rth@twiddle.net To avoid cluttering the code with #ifdef legs we wrap up the print statements into a tlb_debug() macro. As access to the virtual TLB can get quite heavy defining DEBUG_TLB_LOG will ensure all the logs go to the qemu_log target of CPU_LOG_MMU instead of stderr. This remains compile time optional as these debug statements haven't been considered for usefulness for user visible logging. I've also removed DEBUG_TLB_CHECK which wasn't used. Signed-off-by: Alex Bennée Reviewed-by: Richard Henderson --- v2 - ensure compiler checks format strings even if debug is optimised out v5 - reword commit to justify not just using qemu_log at this time v6 - add r-b tag --- cputlb.c | 54 +++++++++++++++++++++++++++++++++++------------------- 1 file changed, 35 insertions(+), 19 deletions(-) diff --git a/cputlb.c b/cputlb.c index 3973030..f259b04 100644 --- a/cputlb.c +++ b/cputlb.c @@ -30,8 +30,30 @@ #include "exec/ram_addr.h" #include "tcg/tcg.h" -//#define DEBUG_TLB -//#define DEBUG_TLB_CHECK +/* DEBUG defines, enable DEBUG_TLB_LOG to log to the CPU_LOG_MMU target */ +/* #define DEBUG_TLB */ +/* #define DEBUG_TLB_LOG */ + +#ifdef DEBUG_TLB +# define DEBUG_TLB_GATE 1 +# ifdef DEBUG_TLB_LOG +# define DEBUG_TLB_LOG_GATE 1 +# else +# define DEBUG_TLB_LOG_GATE 0 +# endif +#else +# define DEBUG_TLB_GATE 0 +# define DEBUG_TLB_LOG_GATE 0 +#endif + +#define tlb_debug(fmt, ...) do { \ + if (DEBUG_TLB_LOG_GATE) { \ + qemu_log_mask(CPU_LOG_MMU, "%s: " fmt, __func__, \ + ## __VA_ARGS__); \ + } else if (DEBUG_TLB_GATE) { \ + fprintf(stderr, "%s: " fmt, __func__, ## __VA_ARGS__); \ + } \ +} while (0) /* statistics */ int tlb_flush_count; @@ -52,9 +74,8 @@ void tlb_flush(CPUState *cpu, int flush_global) { CPUArchState *env = cpu->env_ptr; -#if defined(DEBUG_TLB) - printf("tlb_flush:\n"); -#endif + tlb_debug("(%d)\n", flush_global); + /* must reset current TB so that interrupts cannot modify the links while we are modifying them */ cpu->current_tb = NULL; @@ -128,16 +149,14 @@ void tlb_flush_page(CPUState *cpu, target_ulong addr) int i; int mmu_idx; -#if defined(DEBUG_TLB) - printf("tlb_flush_page: " TARGET_FMT_lx "\n", addr); -#endif + tlb_debug("page :" TARGET_FMT_lx "\n", addr); + /* Check if we need to flush due to large pages. */ if ((addr & env->tlb_flush_mask) == env->tlb_flush_addr) { -#if defined(DEBUG_TLB) - printf("tlb_flush_page: forced full flush (" - TARGET_FMT_lx "/" TARGET_FMT_lx ")\n", - env->tlb_flush_addr, env->tlb_flush_mask); -#endif + tlb_debug("forcing full flush (" + TARGET_FMT_lx "/" TARGET_FMT_lx ")\n", + env->tlb_flush_addr, env->tlb_flush_mask); + tlb_flush(cpu, 1); return; } @@ -367,12 +386,9 @@ void tlb_set_page_with_attrs(CPUState *cpu, target_ulong vaddr, section = address_space_translate_for_iotlb(cpu, asidx, paddr, &xlat, &sz); assert(sz >= TARGET_PAGE_SIZE); -#if defined(DEBUG_TLB) - qemu_log_mask(CPU_LOG_MMU, - "tlb_set_page: vaddr=" TARGET_FMT_lx " paddr=0x" TARGET_FMT_plx - " prot=%x idx=%d\n", - vaddr, paddr, prot, mmu_idx); -#endif + tlb_debug("tlb_set_page: vaddr=" TARGET_FMT_lx " paddr=0x" TARGET_FMT_plx + " prot=%x idx=%d\n", + vaddr, paddr, prot, mmu_idx); address = vaddr; if (!memory_region_is_ram(section->mr) && !memory_region_is_romd(section->mr)) { -- 2.7.0