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107c55005f
KVM guests have certain restrictions and performance quirks when using doorbells. This patch moves the EPAPR KVM guest test so it can be shared with PSERIES, and uses that in doorbell setup code to apply the KVM guest quirks and improves IPI performance for two cases: - PowerVM guests may now use doorbells even if they are secure. - KVM guests no longer use doorbells if XIVE is available. There is a valid complaint that "KVM guest" is not a very reasonable thing to test for, it's preferable for the hypervisor to advertise particular behaviours to the guest so they could change if the hypervisor implementation or configuration changes. However in this case we were already assuming a KVM guest worst case, so this patch is about containing those quirks. If KVM later advertises fast doorbells, we should test for that and override the quirks. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Tested-by: Cédric Le Goater <clg@kaod.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20200726035155.1424103-4-npiggin@gmail.com
149 lines
5.2 KiB
C
149 lines
5.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Copyright (C) 2001 Ben. Herrenschmidt (benh@kernel.crashing.org)
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*
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* Modifications for ppc64:
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* Copyright (C) 2003 Dave Engebretsen <engebret@us.ibm.com>
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*/
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#ifndef __ASM_POWERPC_FIRMWARE_H
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#define __ASM_POWERPC_FIRMWARE_H
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#ifdef __KERNEL__
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#include <asm/asm-const.h>
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/* firmware feature bitmask values */
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#define FW_FEATURE_PFT ASM_CONST(0x0000000000000001)
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#define FW_FEATURE_TCE ASM_CONST(0x0000000000000002)
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#define FW_FEATURE_SPRG0 ASM_CONST(0x0000000000000004)
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#define FW_FEATURE_DABR ASM_CONST(0x0000000000000008)
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#define FW_FEATURE_COPY ASM_CONST(0x0000000000000010)
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#define FW_FEATURE_ASR ASM_CONST(0x0000000000000020)
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#define FW_FEATURE_DEBUG ASM_CONST(0x0000000000000040)
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#define FW_FEATURE_TERM ASM_CONST(0x0000000000000080)
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#define FW_FEATURE_PERF ASM_CONST(0x0000000000000100)
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#define FW_FEATURE_DUMP ASM_CONST(0x0000000000000200)
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#define FW_FEATURE_INTERRUPT ASM_CONST(0x0000000000000400)
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#define FW_FEATURE_MIGRATE ASM_CONST(0x0000000000000800)
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#define FW_FEATURE_PERFMON ASM_CONST(0x0000000000001000)
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#define FW_FEATURE_CRQ ASM_CONST(0x0000000000002000)
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#define FW_FEATURE_VIO ASM_CONST(0x0000000000004000)
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#define FW_FEATURE_RDMA ASM_CONST(0x0000000000008000)
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#define FW_FEATURE_LLAN ASM_CONST(0x0000000000010000)
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#define FW_FEATURE_BULK_REMOVE ASM_CONST(0x0000000000020000)
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#define FW_FEATURE_XDABR ASM_CONST(0x0000000000040000)
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#define FW_FEATURE_PUT_TCE_IND ASM_CONST(0x0000000000080000)
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#define FW_FEATURE_SPLPAR ASM_CONST(0x0000000000100000)
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#define FW_FEATURE_LPAR ASM_CONST(0x0000000000400000)
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#define FW_FEATURE_PS3_LV1 ASM_CONST(0x0000000000800000)
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#define FW_FEATURE_HPT_RESIZE ASM_CONST(0x0000000001000000)
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#define FW_FEATURE_CMO ASM_CONST(0x0000000002000000)
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#define FW_FEATURE_VPHN ASM_CONST(0x0000000004000000)
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#define FW_FEATURE_XCMO ASM_CONST(0x0000000008000000)
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#define FW_FEATURE_OPAL ASM_CONST(0x0000000010000000)
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#define FW_FEATURE_SET_MODE ASM_CONST(0x0000000040000000)
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#define FW_FEATURE_BEST_ENERGY ASM_CONST(0x0000000080000000)
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#define FW_FEATURE_TYPE1_AFFINITY ASM_CONST(0x0000000100000000)
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#define FW_FEATURE_PRRN ASM_CONST(0x0000000200000000)
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#define FW_FEATURE_DRMEM_V2 ASM_CONST(0x0000000400000000)
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#define FW_FEATURE_DRC_INFO ASM_CONST(0x0000000800000000)
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#define FW_FEATURE_BLOCK_REMOVE ASM_CONST(0x0000001000000000)
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#define FW_FEATURE_PAPR_SCM ASM_CONST(0x0000002000000000)
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#define FW_FEATURE_ULTRAVISOR ASM_CONST(0x0000004000000000)
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#define FW_FEATURE_STUFF_TCE ASM_CONST(0x0000008000000000)
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#ifndef __ASSEMBLY__
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enum {
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#ifdef CONFIG_PPC64
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FW_FEATURE_PSERIES_POSSIBLE = FW_FEATURE_PFT | FW_FEATURE_TCE |
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FW_FEATURE_SPRG0 | FW_FEATURE_DABR | FW_FEATURE_COPY |
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FW_FEATURE_ASR | FW_FEATURE_DEBUG | FW_FEATURE_TERM |
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FW_FEATURE_PERF | FW_FEATURE_DUMP | FW_FEATURE_INTERRUPT |
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FW_FEATURE_MIGRATE | FW_FEATURE_PERFMON | FW_FEATURE_CRQ |
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FW_FEATURE_VIO | FW_FEATURE_RDMA | FW_FEATURE_LLAN |
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FW_FEATURE_BULK_REMOVE | FW_FEATURE_XDABR |
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FW_FEATURE_PUT_TCE_IND | FW_FEATURE_STUFF_TCE |
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FW_FEATURE_SPLPAR | FW_FEATURE_LPAR |
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FW_FEATURE_CMO | FW_FEATURE_VPHN | FW_FEATURE_XCMO |
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FW_FEATURE_SET_MODE | FW_FEATURE_BEST_ENERGY |
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FW_FEATURE_TYPE1_AFFINITY | FW_FEATURE_PRRN |
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FW_FEATURE_HPT_RESIZE | FW_FEATURE_DRMEM_V2 |
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FW_FEATURE_DRC_INFO | FW_FEATURE_BLOCK_REMOVE |
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FW_FEATURE_PAPR_SCM | FW_FEATURE_ULTRAVISOR,
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FW_FEATURE_PSERIES_ALWAYS = 0,
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FW_FEATURE_POWERNV_POSSIBLE = FW_FEATURE_OPAL | FW_FEATURE_ULTRAVISOR,
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FW_FEATURE_POWERNV_ALWAYS = 0,
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FW_FEATURE_PS3_POSSIBLE = FW_FEATURE_LPAR | FW_FEATURE_PS3_LV1,
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FW_FEATURE_PS3_ALWAYS = FW_FEATURE_LPAR | FW_FEATURE_PS3_LV1,
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FW_FEATURE_NATIVE_POSSIBLE = 0,
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FW_FEATURE_NATIVE_ALWAYS = 0,
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FW_FEATURE_POSSIBLE =
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#ifdef CONFIG_PPC_PSERIES
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FW_FEATURE_PSERIES_POSSIBLE |
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#endif
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#ifdef CONFIG_PPC_POWERNV
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FW_FEATURE_POWERNV_POSSIBLE |
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#endif
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#ifdef CONFIG_PPC_PS3
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FW_FEATURE_PS3_POSSIBLE |
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#endif
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#ifdef CONFIG_PPC_NATIVE
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FW_FEATURE_NATIVE_ALWAYS |
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#endif
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0,
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FW_FEATURE_ALWAYS =
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#ifdef CONFIG_PPC_PSERIES
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FW_FEATURE_PSERIES_ALWAYS &
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#endif
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#ifdef CONFIG_PPC_POWERNV
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FW_FEATURE_POWERNV_ALWAYS &
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#endif
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#ifdef CONFIG_PPC_PS3
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FW_FEATURE_PS3_ALWAYS &
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#endif
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#ifdef CONFIG_PPC_NATIVE
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FW_FEATURE_NATIVE_ALWAYS &
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#endif
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FW_FEATURE_POSSIBLE,
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#else /* CONFIG_PPC64 */
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FW_FEATURE_POSSIBLE = 0,
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FW_FEATURE_ALWAYS = 0,
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#endif
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};
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/* This is used to identify firmware features which are available
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* to the kernel.
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*/
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extern unsigned long powerpc_firmware_features;
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#define firmware_has_feature(feature) \
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((FW_FEATURE_ALWAYS & (feature)) || \
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(FW_FEATURE_POSSIBLE & powerpc_firmware_features & (feature)))
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extern void system_reset_fwnmi(void);
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extern void machine_check_fwnmi(void);
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/* This is true if we are using the firmware NMI handler (typically LPAR) */
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extern int fwnmi_active;
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extern int ibm_nmi_interlock_token;
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extern unsigned int __start___fw_ftr_fixup, __stop___fw_ftr_fixup;
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#if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_KVM_GUEST)
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bool is_kvm_guest(void);
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#else
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static inline bool is_kvm_guest(void) { return false; }
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#endif
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#ifdef CONFIG_PPC_PSERIES
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void pseries_probe_fw_features(void);
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#else
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static inline void pseries_probe_fw_features(void) { };
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#endif
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#endif /* __ASSEMBLY__ */
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#endif /* __KERNEL__ */
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#endif /* __ASM_POWERPC_FIRMWARE_H */
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