From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:54091) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Scl8F-0001Ij-Sj for qemu-devel@nongnu.org; Thu, 07 Jun 2012 18:24:45 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Scl8D-0006Dz-IT for qemu-devel@nongnu.org; Thu, 07 Jun 2012 18:24:43 -0400 Received: from mail-pz0-f45.google.com ([209.85.210.45]:54072) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Scl8D-0006DT-9z for qemu-devel@nongnu.org; Thu, 07 Jun 2012 18:24:41 -0400 Received: by dadv2 with SMTP id v2so1641799dad.4 for ; Thu, 07 Jun 2012 15:24:39 -0700 (PDT) Sender: Richard Henderson From: Richard Henderson Date: Thu, 7 Jun 2012 15:24:24 -0700 Message-Id: <1339107871-4487-3-git-send-email-rth@twiddle.net> In-Reply-To: <1339107871-4487-1-git-send-email-rth@twiddle.net> References: <1339107871-4487-1-git-send-email-rth@twiddle.net> Subject: [Qemu-devel] [PATCH 2/9] alpha-linux-user: Work around hosted mmap allocation problems List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Riku Voipio Signed-off-by: Richard Henderson --- target-alpha/cpu.h | 11 +++++++++++ 1 files changed, 11 insertions(+), 0 deletions(-) diff --git a/target-alpha/cpu.h b/target-alpha/cpu.h index 99f9ee1..0d87fa7 100644 --- a/target-alpha/cpu.h +++ b/target-alpha/cpu.h @@ -40,9 +40,20 @@ #define TARGET_PAGE_BITS 13 +#ifdef CONFIG_USER_ONLY +/* ??? The kernel likes to give addresses in high memory. If the host has + more virtual address space than the guest, this can lead to impossible + allocations. Honor the long-standing assumption that only kernel addrs + are negative, but otherwise allow allocations anywhere. This could lead + to tricky emulation problems for programs doing tagged addressing, but + that's far fewer than encounter the impossible allocation problem. */ +#define TARGET_PHYS_ADDR_SPACE_BITS 63 +#define TARGET_VIRT_ADDR_SPACE_BITS 63 +#else /* ??? EV4 has 34 phys addr bits, EV5 has 40, EV6 has 44. */ #define TARGET_PHYS_ADDR_SPACE_BITS 44 #define TARGET_VIRT_ADDR_SPACE_BITS (30 + TARGET_PAGE_BITS) +#endif /* Alpha major type */ enum { -- 1.7.7.6