Subject: [PATCH] kvm-userspace: kvm_sync_icache for more architectures
From: Christian Ehrhardt <[EMAIL PROTECTED]>
A ia64 patch introduced kvm_sync_icache within a ifdef __ia64__, but the concept
of split caches is not bound to ia64 and we would like to implement it for ppc
too.
The call to kvm_synch_icache is now indirectly dependent to USE_KVM since
normal
qemu should not need that flush and the function naming kvm_* suggests that it
should be only used if USE_KVM is set.
Signed-off-by: Christian Ehrhardt <[EMAIL PROTECTED]>
---
exec.c | 2 +-
target-ia64/cpu.h | 3 +++
target-ppc/cpu.h | 8 ++++++++
3 files changed, 12 insertions(+), 1 deletion(-)
diff --git a/qemu/exec.c b/qemu/exec.c
index cf14fdd..5b5bd77 100644
--- a/qemu/exec.c
+++ b/qemu/exec.c
@@ -2600,7 +2600,7 @@ void cpu_physical_memory_rw(target_phys_addr_t addr,
uint8_t *buf,
phys_ram_dirty[addr1 >> TARGET_PAGE_BITS] |=
(0xff & ~CODE_DIRTY_FLAG);
}
-#ifdef __ia64__
+#ifdef defined(KVM_SPLIT_CACHE)
kvm_sync_icache((unsigned long)ptr, l);
#endif
}
diff --git a/qemu/target-ia64/cpu.h b/qemu/target-ia64/cpu.h
index 7349e94..0210be9 100644
--- a/qemu/target-ia64/cpu.h
+++ b/qemu/target-ia64/cpu.h
@@ -73,9 +73,12 @@ CPUState *cpu_ia64_init(void);
#include "cpu-all.h"
+#ifdef USE_KVM
/* IA64 has seperate I/D cache, with coherence maintained by DMA controller.
* So to emulate right behavior that guest OS is assumed, we need to flush
* I/D cache here.
*/
+#define KVM_SPLIT_CACHE
void kvm_sync_icache(unsigned long address, int len);
+#endif /* USE_KVM */
#endif
diff --git a/qemu/target-ppc/cpu.h b/qemu/target-ppc/cpu.h
index c4ae414..5ddf6e2 100644
--- a/qemu/target-ppc/cpu.h
+++ b/qemu/target-ppc/cpu.h
@@ -1179,4 +1179,12 @@ enum {
/*****************************************************************************/
+#ifdef USE_KVM
+/* ppc has a seperate I/D cache, emulate the right behavior that the guest OS
+ * is assuming, therefore we need to flush I/D cache here.
+ * FIXME Implemented as noop here until qemu-kvm-ppc code is submitted.
+ */
+#define KVM_SPLIT_CACHE
+#define kvm_sync_icache(address, len) do { } while (0)
+#endif /* USE_KVM */
#endif /* !defined (__CPU_PPC_H__) */
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