From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:57044) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1asVsZ-0003FI-I2 for qemu-devel@nongnu.org; Tue, 19 Apr 2016 09:39:48 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1asVsY-0000g9-Ef for qemu-devel@nongnu.org; Tue, 19 Apr 2016 09:39:47 -0400 Received: from mail-wm0-x243.google.com ([2a00:1450:400c:c09::243]:33305) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1asVsY-0000fu-7r for qemu-devel@nongnu.org; Tue, 19 Apr 2016 09:39:46 -0400 Received: by mail-wm0-x243.google.com with SMTP id y144so5290792wmd.0 for ; Tue, 19 Apr 2016 06:39:46 -0700 (PDT) From: Alvise Rigo Date: Tue, 19 Apr 2016 15:39:22 +0200 Message-Id: <1461073171-22953-6-git-send-email-a.rigo@virtualopensystems.com> In-Reply-To: <1461073171-22953-1-git-send-email-a.rigo@virtualopensystems.com> References: <1461073171-22953-1-git-send-email-a.rigo@virtualopensystems.com> Subject: [Qemu-devel] [RFC v8 05/14] softmmu: Add new TLB_EXCL flag List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org, mttcg@listserver.greensocs.com Cc: jani.kokkonen@huawei.com, claudio.fontana@huawei.com, tech@virtualopensystems.com, alex.bennee@linaro.org, pbonzini@redhat.com, rth@twiddle.net, serge.fdrv@gmail.com, Alvise Rigo , Peter Crosthwaite Add a new TLB flag to force all the accesses made to a page to follow the slow-path. The TLB entries referring guest pages with the DIRTY_MEMORY_EXCLUSIVE bit clean will have this flag set. Suggested-by: Jani Kokkonen Suggested-by: Claudio Fontana Signed-off-by: Alvise Rigo --- include/exec/cpu-all.h | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/include/exec/cpu-all.h b/include/exec/cpu-all.h index 83b1781..f8d8feb 100644 --- a/include/exec/cpu-all.h +++ b/include/exec/cpu-all.h @@ -277,6 +277,14 @@ CPUArchState *cpu_copy(CPUArchState *env); #define TLB_NOTDIRTY (1 << 4) /* Set if TLB entry is an IO callback. */ #define TLB_MMIO (1 << 5) +/* Set if TLB entry references a page that requires exclusive access. */ +#define TLB_EXCL (1 << 6) + +/* Do not allow a TARGET_PAGE_MASK which covers one or more bits defined + * above. */ +#if TLB_EXCL >= TARGET_PAGE_SIZE +#error TARGET_PAGE_MASK covering the low bits of the TLB virtual address +#endif void dump_exec_info(FILE *f, fprintf_function cpu_fprintf); void dump_opcount_info(FILE *f, fprintf_function cpu_fprintf); -- 2.8.0