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[Qemu-devel] [PATCH 2/9] alpha-linux-user: Work around hosted mmap alloc
From: |
Richard Henderson |
Subject: |
[Qemu-devel] [PATCH 2/9] alpha-linux-user: Work around hosted mmap allocation problems |
Date: |
Thu, 7 Jun 2012 15:24:24 -0700 |
Signed-off-by: Richard Henderson <address@hidden>
---
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
- [Qemu-devel] [PATCH v3 0/9] {alpha-}linux user improvements, Richard Henderson, 2012/06/07
- [Qemu-devel] [PATCH 1/9] alpha-linux-user: Fix signal handling, Richard Henderson, 2012/06/07
- [Qemu-devel] [PATCH 2/9] alpha-linux-user: Work around hosted mmap allocation problems,
Richard Henderson <=
- Re: [Qemu-devel] [PATCH 2/9] alpha-linux-user: Work around hosted mmap allocation problems, Andreas Färber, 2012/06/12
- Re: [Qemu-devel] [PATCH 2/9] alpha-linux-user: Work around hosted mmap allocation problems, Richard Henderson, 2012/06/12
- Re: [Qemu-devel] [PATCH 2/9] alpha-linux-user: Work around hosted mmap allocation problems, Alexander Graf, 2012/06/12
- Re: [Qemu-devel] [PATCH 2/9] alpha-linux-user: Work around hosted mmap allocation problems, Richard Henderson, 2012/06/12
- Re: [Qemu-devel] [PATCH 2/9] alpha-linux-user: Work around hosted mmap allocation problems, Alexander Graf, 2012/06/12
- Re: [Qemu-devel] [PATCH 2/9] alpha-linux-user: Work around hosted mmap allocation problems, Richard Henderson, 2012/06/12
[Qemu-devel] [PATCH 3/9] alpha-linux-user: Handle TARGET_SSI_IEEE_RAISE_EXCEPTION properly, Richard Henderson, 2012/06/07
[Qemu-devel] [PATCH 6/9] linux-user: Translate pipe2 flags; add to strace, Richard Henderson, 2012/06/07
[Qemu-devel] [PATCH 5/9] linux-user: Allocate the right amount of space for non-fixed file maps, Richard Henderson, 2012/06/07