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authorLinus Torvalds <torvalds@linux-foundation.org>2014-08-07 11:35:30 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-08-07 11:35:30 -0700
commit66bb0aa077978dbb76e6283531eb3cc7a878de38 (patch)
tree62a28a96cb43df2d8f7c6eb14d4676a1e2ce3887 /arch/powerpc/kvm/book3s_hv_rmhandlers.S
parente306e3be1cbe5b11d0f8a53a557c205cf27e4979 (diff)
parentc77dcacb397519b6ade8f08201a4a90a7f4f751e (diff)
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull second round of KVM changes from Paolo Bonzini: "Here are the PPC and ARM changes for KVM, which I separated because they had small conflicts (respectively within KVM documentation, and with 3.16-rc changes). Since they were all within the subsystem, I took care of them. Stephen Rothwell reported some snags in PPC builds, but they are all fixed now; the latest linux-next report was clean. New features for ARM include: - KVM VGIC v2 emulation on GICv3 hardware - Big-Endian support for arm/arm64 (guest and host) - Debug Architecture support for arm64 (arm32 is on Christoffer's todo list) And for PPC: - Book3S: Good number of LE host fixes, enable HV on LE - Book3S HV: Add in-guest debug support This release drops support for KVM on the PPC440. As a result, the PPC merge removes more lines than it adds. :) I also included an x86 change, since Davidlohr tied it to an independent bug report and the reporter quickly provided a Tested-by; there was no reason to wait for -rc2" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (122 commits) KVM: Move more code under CONFIG_HAVE_KVM_IRQFD KVM: nVMX: fix "acknowledge interrupt on exit" when APICv is in use KVM: nVMX: Fix nested vmexit ack intr before load vmcs01 KVM: PPC: Enable IRQFD support for the XICS interrupt controller KVM: Give IRQFD its own separate enabling Kconfig option KVM: Move irq notifier implementation into eventfd.c KVM: Move all accesses to kvm::irq_routing into irqchip.c KVM: irqchip: Provide and use accessors for irq routing table KVM: Don't keep reference to irq routing table in irqfd struct KVM: PPC: drop duplicate tracepoint arm64: KVM: fix 64bit CP15 VM access for 32bit guests KVM: arm64: GICv3: mandate page-aligned GICV region arm64: KVM: GICv3: move system register access to msr_s/mrs_s KVM: PPC: PR: Handle FSCR feature deselects KVM: PPC: HV: Remove generic instruction emulation KVM: PPC: BOOKEHV: rename e500hv_spr to bookehv_spr KVM: PPC: Remove DCR handling KVM: PPC: Expose helper functions for data/inst faults KVM: PPC: Separate loadstore emulation from priv emulation KVM: PPC: Handle magic page in kvmppc_ld/st ...
Diffstat (limited to 'arch/powerpc/kvm/book3s_hv_rmhandlers.S')
-rw-r--r--arch/powerpc/kvm/book3s_hv_rmhandlers.S70
1 files changed, 46 insertions, 24 deletions
diff --git a/arch/powerpc/kvm/book3s_hv_rmhandlers.S b/arch/powerpc/kvm/book3s_hv_rmhandlers.S
index 7faf8fd05738..f0c4db7704c3 100644
--- a/arch/powerpc/kvm/book3s_hv_rmhandlers.S
+++ b/arch/powerpc/kvm/book3s_hv_rmhandlers.S
@@ -32,10 +32,6 @@
#define VCPU_GPRS_TM(reg) (((reg) * ULONG_SIZE) + VCPU_GPR_TM)
-#ifdef __LITTLE_ENDIAN__
-#error Need to fix lppaca and SLB shadow accesses in little endian mode
-#endif
-
/* Values in HSTATE_NAPPING(r13) */
#define NAPPING_CEDE 1
#define NAPPING_NOVCPU 2
@@ -601,9 +597,10 @@ kvmppc_got_guest:
ld r3, VCPU_VPA(r4)
cmpdi r3, 0
beq 25f
- lwz r5, LPPACA_YIELDCOUNT(r3)
+ li r6, LPPACA_YIELDCOUNT
+ LWZX_BE r5, r3, r6
addi r5, r5, 1
- stw r5, LPPACA_YIELDCOUNT(r3)
+ STWX_BE r5, r3, r6
li r6, 1
stb r6, VCPU_VPA_DIRTY(r4)
25:
@@ -677,9 +674,9 @@ END_FTR_SECTION_IFCLR(CPU_FTR_TM)
mr r31, r4
addi r3, r31, VCPU_FPRS_TM
- bl .load_fp_state
+ bl load_fp_state
addi r3, r31, VCPU_VRS_TM
- bl .load_vr_state
+ bl load_vr_state
mr r4, r31
lwz r7, VCPU_VRSAVE_TM(r4)
mtspr SPRN_VRSAVE, r7
@@ -1423,9 +1420,9 @@ END_FTR_SECTION_IFCLR(CPU_FTR_TM)
/* Save FP/VSX. */
addi r3, r9, VCPU_FPRS_TM
- bl .store_fp_state
+ bl store_fp_state
addi r3, r9, VCPU_VRS_TM
- bl .store_vr_state
+ bl store_vr_state
mfspr r6, SPRN_VRSAVE
stw r6, VCPU_VRSAVE_TM(r9)
1:
@@ -1448,9 +1445,10 @@ END_FTR_SECTION_IFCLR(CPU_FTR_TM)
ld r8, VCPU_VPA(r9) /* do they have a VPA? */
cmpdi r8, 0
beq 25f
- lwz r3, LPPACA_YIELDCOUNT(r8)
+ li r4, LPPACA_YIELDCOUNT
+ LWZX_BE r3, r8, r4
addi r3, r3, 1
- stw r3, LPPACA_YIELDCOUNT(r8)
+ STWX_BE r3, r8, r4
li r3, 1
stb r3, VCPU_VPA_DIRTY(r9)
25:
@@ -1763,8 +1761,10 @@ END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S)
33: ld r8,PACA_SLBSHADOWPTR(r13)
.rept SLB_NUM_BOLTED
- ld r5,SLBSHADOW_SAVEAREA(r8)
- ld r6,SLBSHADOW_SAVEAREA+8(r8)
+ li r3, SLBSHADOW_SAVEAREA
+ LDX_BE r5, r8, r3
+ addi r3, r3, 8
+ LDX_BE r6, r8, r3
andis. r7,r5,SLB_ESID_V@h
beq 1f
slbmte r6,r5
@@ -1915,12 +1915,23 @@ hcall_try_real_mode:
clrrdi r3,r3,2
cmpldi r3,hcall_real_table_end - hcall_real_table
bge guest_exit_cont
+ /* See if this hcall is enabled for in-kernel handling */
+ ld r4, VCPU_KVM(r9)
+ srdi r0, r3, 8 /* r0 = (r3 / 4) >> 6 */
+ sldi r0, r0, 3 /* index into kvm->arch.enabled_hcalls[] */
+ add r4, r4, r0
+ ld r0, KVM_ENABLED_HCALLS(r4)
+ rlwinm r4, r3, 32-2, 0x3f /* r4 = (r3 / 4) & 0x3f */
+ srd r0, r0, r4
+ andi. r0, r0, 1
+ beq guest_exit_cont
+ /* Get pointer to handler, if any, and call it */
LOAD_REG_ADDR(r4, hcall_real_table)
lwax r3,r3,r4
cmpwi r3,0
beq guest_exit_cont
- add r3,r3,r4
- mtctr r3
+ add r12,r3,r4
+ mtctr r12
mr r3,r9 /* get vcpu pointer */
ld r4,VCPU_GPR(R4)(r9)
bctrl
@@ -2037,6 +2048,7 @@ hcall_real_table:
.long 0 /* 0x12c */
.long 0 /* 0x130 */
.long DOTSYM(kvmppc_h_set_xdabr) - hcall_real_table
+ .globl hcall_real_table_end
hcall_real_table_end:
ignore_hdec:
@@ -2344,7 +2356,18 @@ kvmppc_read_intr:
cmpdi r6, 0
beq- 1f
lwzcix r0, r6, r7
- rlwinm. r3, r0, 0, 0xffffff
+ /*
+ * Save XIRR for later. Since we get in in reverse endian on LE
+ * systems, save it byte reversed and fetch it back in host endian.
+ */
+ li r3, HSTATE_SAVED_XIRR
+ STWX_BE r0, r3, r13
+#ifdef __LITTLE_ENDIAN__
+ lwz r3, HSTATE_SAVED_XIRR(r13)
+#else
+ mr r3, r0
+#endif
+ rlwinm. r3, r3, 0, 0xffffff
sync
beq 1f /* if nothing pending in the ICP */
@@ -2376,10 +2399,9 @@ kvmppc_read_intr:
li r3, -1
1: blr
-42: /* It's not an IPI and it's for the host, stash it in the PACA
- * before exit, it will be picked up by the host ICP driver
+42: /* It's not an IPI and it's for the host. We saved a copy of XIRR in
+ * the PACA earlier, it will be picked up by the host ICP driver
*/
- stw r0, HSTATE_SAVED_XIRR(r13)
li r3, 1
b 1b
@@ -2414,11 +2436,11 @@ END_FTR_SECTION_IFSET(CPU_FTR_VSX)
mtmsrd r8
isync
addi r3,r3,VCPU_FPRS
- bl .store_fp_state
+ bl store_fp_state
#ifdef CONFIG_ALTIVEC
BEGIN_FTR_SECTION
addi r3,r31,VCPU_VRS
- bl .store_vr_state
+ bl store_vr_state
END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC)
#endif
mfspr r6,SPRN_VRSAVE
@@ -2450,11 +2472,11 @@ END_FTR_SECTION_IFSET(CPU_FTR_VSX)
mtmsrd r8
isync
addi r3,r4,VCPU_FPRS
- bl .load_fp_state
+ bl load_fp_state
#ifdef CONFIG_ALTIVEC
BEGIN_FTR_SECTION
addi r3,r31,VCPU_VRS
- bl .load_vr_state
+ bl load_vr_state
END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC)
#endif
lwz r7,VCPU_VRSAVE(r31)