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[Qemu-devel] qemu-kvm: Role of flush_icache_range on PPC
From: |
Jan Kiszka |
Subject: |
[Qemu-devel] qemu-kvm: Role of flush_icache_range on PPC |
Date: |
Wed, 28 Sep 2011 16:23:31 +0200 |
User-agent: |
Mozilla/5.0 (X11; U; Linux i686 (x86_64); de; rv:1.8.1.12) Gecko/20080226 SUSE/2.0.0.12-1.1 Thunderbird/2.0.0.12 Mnenhy/0.7.5.666 |
Alex,
we have this diff in qemu-kvm:
diff --git a/exec.c b/exec.c
index c1e045d..f188549 100644
--- a/exec.c
+++ b/exec.c
@@ -3950,6 +3955,11 @@ void cpu_physical_memory_rw(target_phys_addr_t addr,
uint8_t *buf,
cpu_physical_memory_set_dirty_flags(
addr1, (0xff & ~CODE_DIRTY_FLAG));
}
+ /* qemu doesn't execute guest code directly, but kvm does
+ therefore flush instruction caches */
+ if (kvm_enabled())
+ flush_icache_range((unsigned long)ptr,
+ ((unsigned long)ptr)+l);
qemu_put_ram_ptr(ptr);
}
} else {
flush_icache_range() is doing something only on PPC hosts. So do we need
this upstream?
Jan
--
Siemens AG, Corporate Technology, CT T DE IT 1
Corporate Competence Center Embedded Linux
- [Qemu-devel] qemu-kvm: Role of flush_icache_range on PPC,
Jan Kiszka <=
- Re: [Qemu-devel] qemu-kvm: Role of flush_icache_range on PPC, Alexander Graf, 2011/09/28
- Re: [Qemu-devel] qemu-kvm: Role of flush_icache_range on PPC, Jan Kiszka, 2011/09/28
- Re: [Qemu-devel] qemu-kvm: Role of flush_icache_range on PPC, Scott Wood, 2011/09/28
- Re: [Qemu-devel] qemu-kvm: Role of flush_icache_range on PPC, Benjamin Herrenschmidt, 2011/09/28
- Re: [Qemu-devel] qemu-kvm: Role of flush_icache_range on PPC, Scott Wood, 2011/09/28
- Re: [Qemu-devel] qemu-kvm: Role of flush_icache_range on PPC, Benjamin Herrenschmidt, 2011/09/28
Re: [Qemu-devel] qemu-kvm: Role of flush_icache_range on PPC, Benjamin Herrenschmidt, 2011/09/28