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[Qemu-ppc] [PATCH V2] target-ppc: ppc64 target's virtio can be either en
From: |
Greg Kurz |
Subject: |
[Qemu-ppc] [PATCH V2] target-ppc: ppc64 target's virtio can be either endian. |
Date: |
Wed, 11 Dec 2013 16:59:33 +0100 |
User-agent: |
StGit/0.16 |
We base it on the OS endian, as reflected by the endianness of the
interrupt vectors (handled through the ILE bit in the LPCR register).
This patch does two things:
- make LPCR a KVM register
- implement virtio_get_byteswap() over LPCR
Using first_cpu to fetch the registers from KVM may look arbitrary
and awkward, but it is okay because KVM sets/unsets the ILE bit on
all CPUs.
Changes in v2:
- call cpu_synchronize_state() instead of kvm_arch_get_registers().
Suggested-by: Benjamin Herrenschmidt <address@hidden>
Signed-off-by: Rusty Russell <address@hidden>
Signed-off-by: Greg Kurz <address@hidden>
---
Alex,
If you are interested, I can resend the whole virtio+endian serie or
setup a git tree for you to pull from.
--
Greg
target-ppc/kvm.c | 4 ++++
target-ppc/misc_helper.c | 12 ++++++++++++
2 files changed, 16 insertions(+)
diff --git a/target-ppc/kvm.c b/target-ppc/kvm.c
index 10d0cd9..b450a22 100644
--- a/target-ppc/kvm.c
+++ b/target-ppc/kvm.c
@@ -869,6 +869,8 @@ int kvm_arch_put_registers(CPUState *cs, int level)
DPRINTF("Warning: Unable to set VPA information to KVM\n");
}
}
+
+ kvm_put_one_spr(cs, KVM_REG_PPC_LPCR, SPR_LPCR);
#endif /* TARGET_PPC64 */
}
@@ -1091,6 +1093,8 @@ int kvm_arch_get_registers(CPUState *cs)
DPRINTF("Warning: Unable to get VPA information from KVM\n");
}
}
+
+ kvm_get_one_spr(cs, KVM_REG_PPC_LPCR, SPR_LPCR);
#endif
}
diff --git a/target-ppc/misc_helper.c b/target-ppc/misc_helper.c
index 616aab6..e8fc8a3 100644
--- a/target-ppc/misc_helper.c
+++ b/target-ppc/misc_helper.c
@@ -20,6 +20,8 @@
#include "helper.h"
#include "helper_regs.h"
+#include "hw/virtio/virtio.h"
+#include "sysemu/kvm.h"
/*****************************************************************************/
/* SPR accesses */
@@ -116,3 +118,13 @@ void ppc_store_msr(CPUPPCState *env, target_ulong value)
{
hreg_store_msr(env, value, 0);
}
+
+bool virtio_get_byteswap(void)
+{
+ PowerPCCPU *cp = POWERPC_CPU(first_cpu);
+ CPUPPCState *env = &cp->env;
+
+ cpu_synchronize_state(first_cpu);
+
+ return env->spr[SPR_LPCR] & LPCR_ILE;
+}
- Re: [Qemu-ppc] [PATCH] target-ppc: ppc64 target's virtio can be either endian., Alexander Graf, 2013/12/09
- Re: [Qemu-ppc] [PATCH] target-ppc: ppc64 target's virtio can be either endian., Greg Kurz, 2013/12/09
- Re: [Qemu-ppc] [PATCH] target-ppc: ppc64 target's virtio can be either endian., Alexander Graf, 2013/12/09
- Re: [Qemu-ppc] [PATCH] target-ppc: ppc64 target's virtio can be either endian., Greg Kurz, 2013/12/10
- Re: [Qemu-ppc] [PATCH] target-ppc: ppc64 target's virtio can be either endian., Alexander Graf, 2013/12/10
- Re: [Qemu-ppc] [PATCH] target-ppc: ppc64 target's virtio can be either endian., Greg Kurz, 2013/12/10
- Re: [Qemu-ppc] [PATCH] target-ppc: ppc64 target's virtio can be either endian., Alexander Graf, 2013/12/10
- [Qemu-ppc] [PATCH V2] target-ppc: ppc64 target's virtio can be either endian.,
Greg Kurz <=
- Re: [Qemu-ppc] [PATCH V2] target-ppc: ppc64 target's virtio can be either endian., Alexander Graf, 2013/12/11
- Re: [Qemu-ppc] [PATCH V2] target-ppc: ppc64 target's virtio can be either endian., Greg Kurz, 2013/12/11
Re: [Qemu-ppc] [PATCH] target-ppc: ppc64 target's virtio can be either endian., Benjamin Herrenschmidt, 2013/12/09