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[Qemu-devel] [PATCH 05/13] Allocate physical memory in low virtual addre
From: |
Alexander Graf |
Subject: |
[Qemu-devel] [PATCH 05/13] Allocate physical memory in low virtual address space |
Date: |
Tue, 24 Nov 2009 18:29:33 +0100 |
KVM on S390x requires the virtual address space of the guest's RAM to be
within the first 256GB.
The general direction I'd like to see KVM on S390 move is that this requirement
is losened, but for now that's what we're stuck with.
So let's just hack up qemu_ram_alloc until KVM behaves nicely :-).
Signed-off-by: Alexander Graf <address@hidden>
---
exec.c | 6 ++++++
1 files changed, 6 insertions(+), 0 deletions(-)
diff --git a/exec.c b/exec.c
index 076d26b..59150d0 100644
--- a/exec.c
+++ b/exec.c
@@ -2411,7 +2411,13 @@ ram_addr_t qemu_ram_alloc(ram_addr_t size)
size = TARGET_PAGE_ALIGN(size);
new_block = qemu_malloc(sizeof(*new_block));
+#if defined(TARGET_S390) && defined(CONFIG_KVM)
+ /* XXX S390 KVM requires the topmost vma of the RAM to be < 256GB */
+ new_block->host = mmap(0x1000000, size, PROT_EXEC|PROT_READ|PROT_WRITE,
+ MAP_SHARED | MAP_ANONYMOUS, -1, 0);
+#else
new_block->host = qemu_vmalloc(size);
+#endif
#ifdef MADV_MERGEABLE
madvise(new_block->host, size, MADV_MERGEABLE);
#endif
--
1.6.0.2
[Qemu-devel] [PATCH 09/13] S390 GDB stub, Alexander Graf, 2009/11/24
[Qemu-devel] [PATCH 07/13] Add S390x virtio machine bus, Alexander Graf, 2009/11/24
[Qemu-devel] [PATCH 05/13] Allocate physical memory in low virtual address space,
Alexander Graf <=
[Qemu-devel] [PATCH 08/13] Add S390x virtio machine description, Alexander Graf, 2009/11/24
[Qemu-devel] [PATCH 13/13] Add S390 maintainer information, Alexander Graf, 2009/11/24
[Qemu-devel] [PATCH 11/13] Set default console to virtio on S390x, Alexander Graf, 2009/11/24
[Qemu-devel] [PATCH 04/13] Add KVM support for S390x, Alexander Graf, 2009/11/24
[Qemu-devel] [PATCH 02/13] S/390 host/target build system support, Alexander Graf, 2009/11/24
[Qemu-devel] [PATCH 06/13] Add support for S390x system emulation, Alexander Graf, 2009/11/24
[Qemu-devel] [PATCH 12/13] Add zipl bootloader interpreter, Alexander Graf, 2009/11/24