KVM: PPC: Remove 440 support

The 440 target hasn't been properly functioning for a few releases and before I was the only one who fixes a very serious bug that indicates to me that nobody used it before either. Furthermore KVM on 440 is slow to the extent of unusable. We don't have to carry along completely unused code. Remove 440 and give us one less thing to worry about. Signed-off-by: Alexander Graf <agraf@suse.de>
mariux64 · Jul 28, 2014 · b2677b8 · b2677b8
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commit b2677b8
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Showing 17 changed files with 2 additions and 1,204 deletions.
diff --git a/Documentation/powerpc/00-INDEX b/Documentation/powerpc/00-INDEX
@@ -17,8 +17,6 @@ firmware-assisted-dump.txt
 	- Documentation on the firmware assisted dump mechanism "fadump".
 hvcs.txt
 	- IBM "Hypervisor Virtual Console Server" Installation Guide
-kvm_440.txt
-	- Various notes on the implementation of KVM for PowerPC 440.
 mpc52xx.txt
 	- Linux 2.6.x on MPC52xx family
 pmu-ebb.txt

diff --git a/Documentation/powerpc/kvm_440.txt b/Documentation/powerpc/kvm_440.txt
diff --git a/arch/powerpc/Kconfig.debug b/arch/powerpc/Kconfig.debug
@@ -202,9 +202,7 @@ config PPC_EARLY_DEBUG_BEAT
 
 config PPC_EARLY_DEBUG_44x
 	bool "Early serial debugging for IBM/AMCC 44x CPUs"
-	# PPC_EARLY_DEBUG on 440 leaves AS=1 mappings above the TLB high water
-	# mark, which doesn't work with current 440 KVM.
-	depends on 44x && !KVM
+	depends on 44x
 	help
 	  Select this to enable early debugging for IBM 44x chips via the
 	  inbuilt serial port.  If you enable this, ensure you set

diff --git a/arch/powerpc/configs/ppc44x_defconfig b/arch/powerpc/configs/ppc44x_defconfig
@@ -127,4 +127,3 @@ CONFIG_CRYPTO_PCBC=y
 # CONFIG_CRYPTO_ANSI_CPRNG is not set
 # CONFIG_CRYPTO_HW is not set
 CONFIG_VIRTUALIZATION=y
-CONFIG_KVM_440=y
diff --git a/arch/powerpc/include/asm/kvm_44x.h b/arch/powerpc/include/asm/kvm_44x.h
diff --git a/arch/powerpc/include/asm/kvm_asm.h b/arch/powerpc/include/asm/kvm_asm.h
@@ -33,7 +33,6 @@
 /* IVPR must be 64KiB-aligned. */
 #define VCPU_SIZE_ORDER 4
 #define VCPU_SIZE_LOG   (VCPU_SIZE_ORDER + 12)
-#define VCPU_TLB_PGSZ   PPC44x_TLB_64K
 #define VCPU_SIZE_BYTES (1<<VCPU_SIZE_LOG)
 
 #define BOOKE_INTERRUPT_CRITICAL 0

diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h
@@ -49,7 +49,6 @@
 #define KVM_NR_IRQCHIPS          1
 #define KVM_IRQCHIP_NUM_PINS     256
 
-#if !defined(CONFIG_KVM_440)
 #include <linux/mmu_notifier.h>
 
 #define KVM_ARCH_WANT_MMU_NOTIFIER
@@ -62,8 +61,6 @@ extern int kvm_age_hva(struct kvm *kvm, unsigned long hva);
 extern int kvm_test_age_hva(struct kvm *kvm, unsigned long hva);
 extern void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
 
-#endif
-
 #define HPTEG_CACHE_NUM			(1 << 15)
 #define HPTEG_HASH_BITS_PTE		13
 #define HPTEG_HASH_BITS_PTE_LONG	12

diff --git a/arch/powerpc/kvm/44x.c b/arch/powerpc/kvm/44x.c