From: Alexander Graf <agraf@suse•de>
To: kvm-ppc@vger•kernel.org
Cc: linuxppc-dev <linuxppc-dev@lists•ozlabs.org>,
KVM list <kvm@vger•kernel.org>
Subject: [PATCH 19/26] KVM: PPC: PV instructions to loads and stores
Date: Sat, 26 Jun 2010 01:25:07 +0200 [thread overview]
Message-ID: <1277508314-915-20-git-send-email-agraf@suse.de> (raw)
In-Reply-To: <1277508314-915-1-git-send-email-agraf@suse.de>
Some instructions can simply be replaced by load and store instructions to
or from the magic page.
This patch replaces often called instructions that fall into the above category.
Signed-off-by: Alexander Graf <agraf@suse•de>
---
arch/powerpc/kernel/kvm.c | 111 +++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 111 insertions(+), 0 deletions(-)
diff --git a/arch/powerpc/kernel/kvm.c b/arch/powerpc/kernel/kvm.c
index d873bc6..b165b20 100644
--- a/arch/powerpc/kernel/kvm.c
+++ b/arch/powerpc/kernel/kvm.c
@@ -32,8 +32,65 @@
#define KVM_MAGIC_PAGE (-4096L)
#define magic_var(x) KVM_MAGIC_PAGE + offsetof(struct kvm_vcpu_arch_shared, x)
+#define KVM_INST_LWZ 0x80000000
+#define KVM_INST_STW 0x90000000
+#define KVM_INST_LD 0xe8000000
+#define KVM_INST_STD 0xf8000000
+#define KVM_INST_NOP 0x60000000
+#define KVM_INST_B 0x48000000
+#define KVM_INST_B_MASK 0x03ffffff
+#define KVM_INST_B_MAX 0x01ffffff
+
+#define KVM_MASK_RT 0x03e00000
+#define KVM_INST_MFMSR 0x7c0000a6
+#define KVM_INST_MFSPR_SPRG0 0x7c1042a6
+#define KVM_INST_MFSPR_SPRG1 0x7c1142a6
+#define KVM_INST_MFSPR_SPRG2 0x7c1242a6
+#define KVM_INST_MFSPR_SPRG3 0x7c1342a6
+#define KVM_INST_MFSPR_SRR0 0x7c1a02a6
+#define KVM_INST_MFSPR_SRR1 0x7c1b02a6
+#define KVM_INST_MFSPR_DAR 0x7c1302a6
+#define KVM_INST_MFSPR_DSISR 0x7c1202a6
+
+#define KVM_INST_MTSPR_SPRG0 0x7c1043a6
+#define KVM_INST_MTSPR_SPRG1 0x7c1143a6
+#define KVM_INST_MTSPR_SPRG2 0x7c1243a6
+#define KVM_INST_MTSPR_SPRG3 0x7c1343a6
+#define KVM_INST_MTSPR_SRR0 0x7c1a03a6
+#define KVM_INST_MTSPR_SRR1 0x7c1b03a6
+#define KVM_INST_MTSPR_DAR 0x7c1303a6
+#define KVM_INST_MTSPR_DSISR 0x7c1203a6
+
static bool kvm_patching_worked = true;
+static void kvm_patch_ins_ld(u32 *inst, long addr, u32 rt)
+{
+#ifdef CONFIG_64BIT
+ *inst = KVM_INST_LD | rt | (addr & 0x0000fffc);
+#else
+ *inst = KVM_INST_LWZ | rt | ((addr + 4) & 0x0000fffc);
+#endif
+}
+
+static void kvm_patch_ins_lwz(u32 *inst, long addr, u32 rt)
+{
+ *inst = KVM_INST_LWZ | rt | (addr & 0x0000ffff);
+}
+
+static void kvm_patch_ins_std(u32 *inst, long addr, u32 rt)
+{
+#ifdef CONFIG_64BIT
+ *inst = KVM_INST_STD | rt | (addr & 0x0000fffc);
+#else
+ *inst = KVM_INST_STW | rt | ((addr + 4) & 0x0000fffc);
+#endif
+}
+
+static void kvm_patch_ins_stw(u32 *inst, long addr, u32 rt)
+{
+ *inst = KVM_INST_STW | rt | (addr & 0x0000fffc);
+}
+
static void kvm_map_magic_page(void *data)
{
kvm_hypercall2(KVM_HC_PPC_MAP_MAGIC_PAGE,
@@ -48,6 +105,60 @@ static void kvm_check_ins(u32 *inst)
u32 inst_rt = _inst & KVM_MASK_RT;
switch (inst_no_rt) {
+ /* Loads */
+ case KVM_INST_MFMSR:
+ kvm_patch_ins_ld(inst, magic_var(msr), inst_rt);
+ break;
+ case KVM_INST_MFSPR_SPRG0:
+ kvm_patch_ins_ld(inst, magic_var(sprg0), inst_rt);
+ break;
+ case KVM_INST_MFSPR_SPRG1:
+ kvm_patch_ins_ld(inst, magic_var(sprg1), inst_rt);
+ break;
+ case KVM_INST_MFSPR_SPRG2:
+ kvm_patch_ins_ld(inst, magic_var(sprg2), inst_rt);
+ break;
+ case KVM_INST_MFSPR_SPRG3:
+ kvm_patch_ins_ld(inst, magic_var(sprg3), inst_rt);
+ break;
+ case KVM_INST_MFSPR_SRR0:
+ kvm_patch_ins_ld(inst, magic_var(srr0), inst_rt);
+ break;
+ case KVM_INST_MFSPR_SRR1:
+ kvm_patch_ins_ld(inst, magic_var(srr1), inst_rt);
+ break;
+ case KVM_INST_MFSPR_DAR:
+ kvm_patch_ins_ld(inst, magic_var(dar), inst_rt);
+ break;
+ case KVM_INST_MFSPR_DSISR:
+ kvm_patch_ins_lwz(inst, magic_var(dsisr), inst_rt);
+ break;
+
+ /* Stores */
+ case KVM_INST_MTSPR_SPRG0:
+ kvm_patch_ins_std(inst, magic_var(sprg0), inst_rt);
+ break;
+ case KVM_INST_MTSPR_SPRG1:
+ kvm_patch_ins_std(inst, magic_var(sprg1), inst_rt);
+ break;
+ case KVM_INST_MTSPR_SPRG2:
+ kvm_patch_ins_std(inst, magic_var(sprg2), inst_rt);
+ break;
+ case KVM_INST_MTSPR_SPRG3:
+ kvm_patch_ins_std(inst, magic_var(sprg3), inst_rt);
+ break;
+ case KVM_INST_MTSPR_SRR0:
+ kvm_patch_ins_std(inst, magic_var(srr0), inst_rt);
+ break;
+ case KVM_INST_MTSPR_SRR1:
+ kvm_patch_ins_std(inst, magic_var(srr1), inst_rt);
+ break;
+ case KVM_INST_MTSPR_DAR:
+ kvm_patch_ins_std(inst, magic_var(dar), inst_rt);
+ break;
+ case KVM_INST_MTSPR_DSISR:
+ kvm_patch_ins_stw(inst, magic_var(dsisr), inst_rt);
+ break;
}
switch (_inst) {
--
1.6.0.2
next prev parent reply other threads:[~2010-06-25 23:25 UTC|newest]
Thread overview: 78+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-25 23:24 [PATCH 00/26] KVM PPC PV framework Alexander Graf
2010-06-25 23:24 ` [PATCH 01/26] KVM: PPC: Introduce shared page Alexander Graf
2010-06-27 12:12 ` Avi Kivity
2010-06-29 9:54 ` Alexander Graf
2010-06-29 10:55 ` Avi Kivity
2010-06-25 23:24 ` [PATCH 02/26] KVM: PPC: Convert MSR to " Alexander Graf
2010-06-27 8:16 ` Avi Kivity
2010-06-27 9:38 ` Alexander Graf
2010-06-27 9:50 ` Avi Kivity
2010-06-27 10:40 ` Alexander Graf
2010-06-25 23:24 ` [PATCH 03/26] KVM: PPC: Convert DSISR " Alexander Graf
2010-06-25 23:24 ` [PATCH 04/26] KVM: PPC: Convert DAR " Alexander Graf
2010-06-25 23:24 ` [PATCH 05/26] KVM: PPC: Convert SRR0 and SRR1 " Alexander Graf
2010-06-25 23:24 ` [PATCH 06/26] KVM: PPC: Convert SPRG[0-4] " Alexander Graf
2010-06-25 23:24 ` [PATCH 07/26] KVM: PPC: Implement hypervisor interface Alexander Graf
2010-06-25 23:24 ` [PATCH 08/26] KVM: PPC: Add PV guest critical sections Alexander Graf
2010-06-27 8:21 ` Avi Kivity
2010-06-27 9:40 ` Alexander Graf
2010-06-27 9:52 ` Avi Kivity
2010-06-27 10:33 ` Alexander Graf
2010-06-27 10:59 ` Avi Kivity
2010-06-27 11:49 ` Alexander Graf
2010-06-27 11:53 ` Avi Kivity
2010-06-27 12:06 ` Alexander Graf
2010-06-27 22:03 ` Benjamin Herrenschmidt
2010-06-27 10:03 ` Avi Kivity
2010-06-27 10:35 ` Alexander Graf
2010-06-25 23:24 ` [PATCH 09/26] KVM: PPC: Add PV guest scratch registers Alexander Graf
2010-06-27 8:22 ` Avi Kivity
2010-06-27 9:41 ` Alexander Graf
2010-06-27 9:53 ` Avi Kivity
2010-06-25 23:24 ` [PATCH 10/26] KVM: PPC: Tell guest about pending interrupts Alexander Graf
2010-06-25 23:24 ` [PATCH 11/26] KVM: PPC: Make RMO a define Alexander Graf
2010-06-26 16:52 ` Segher Boessenkool
2010-06-27 9:08 ` Alexander Graf
2010-06-29 7:32 ` Segher Boessenkool
2010-06-29 7:39 ` Alexander Graf
2010-06-29 7:52 ` Segher Boessenkool
2010-06-29 8:04 ` Alexander Graf
2010-06-25 23:25 ` [PATCH 12/26] KVM: PPC: First magic page steps Alexander Graf
2010-06-27 8:24 ` Avi Kivity
2010-06-27 9:44 ` Alexander Graf
2010-06-25 23:25 ` [PATCH 13/26] KVM: PPC: Magic Page Book3s support Alexander Graf
2010-06-25 23:25 ` [PATCH 14/26] KVM: PPC: Magic Page BookE support Alexander Graf
2010-06-25 23:25 ` [PATCH 15/26] KVM: PPC: Expose magic page support to guest Alexander Graf
2010-06-25 23:25 ` [PATCH 16/26] KVM: Move kvm_guest_init out of generic code Alexander Graf
2010-06-25 23:25 ` [PATCH 17/26] KVM: PPC: Generic KVM PV guest support Alexander Graf
2010-06-25 23:25 ` [PATCH 18/26] KVM: PPC: KVM PV guest stubs Alexander Graf
2010-06-27 8:28 ` Avi Kivity
2010-06-27 9:47 ` Alexander Graf
2010-06-27 10:16 ` Avi Kivity
2010-06-27 10:38 ` Alexander Graf
2010-06-27 22:04 ` Benjamin Herrenschmidt
2010-06-28 4:39 ` Matt Evans
2010-06-28 6:33 ` Alexander Graf
2010-06-28 8:15 ` Avi Kivity
2010-06-28 8:23 ` Alexander Graf
2010-06-28 8:33 ` Avi Kivity
2010-06-25 23:25 ` Alexander Graf [this message]
2010-06-25 23:25 ` [PATCH 20/26] KVM: PPC: PV tlbsync to nop Alexander Graf
2010-06-25 23:25 ` [PATCH 21/26] KVM: PPC: Introduce kvm_tmp framework Alexander Graf
2010-06-25 23:25 ` [PATCH 22/26] KVM: PPC: PV assembler helpers Alexander Graf
2010-06-25 23:25 ` [PATCH 23/26] KVM: PPC: PV mtmsrd L=1 Alexander Graf
2010-06-25 23:25 ` [PATCH 24/26] KVM: PPC: PV mtmsrd L=0 and mtmsr Alexander Graf
2010-06-26 17:03 ` Segher Boessenkool
2010-06-27 9:10 ` Alexander Graf
2010-06-29 7:37 ` Segher Boessenkool
2010-06-25 23:25 ` [PATCH 25/26] KVM: PPC: PV wrteei Alexander Graf
2010-06-25 23:25 ` [PATCH 26/26] KVM: PPC: Add Documentation about PV interface Alexander Graf
2010-06-27 8:14 ` Avi Kivity
2010-06-27 9:33 ` Alexander Graf
2010-06-28 7:18 ` Milton Miller
2010-06-28 7:49 ` Alexander Graf
2010-06-28 8:13 ` Avi Kivity
2010-06-28 8:21 ` Alexander Graf
2010-06-28 8:32 ` Avi Kivity
2010-06-27 8:34 ` Avi Kivity
2010-06-27 9:49 ` Alexander Graf
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