From 8121b8f947be0033f567619be204639a50cad298 Mon Sep 17 00:00:00 2001 From: Borislav Petkov Date: Thu, 2 Sep 2021 13:33:22 +0200 Subject: [PATCH] x86/mce: Get rid of msr_ops Avoid having indirect calls and use a normal function which returns the proper MSR address based on ->smca setting. No functional changes. Signed-off-by: Borislav Petkov Reviewed-by: Tony Luck Link: https://lkml.kernel.org/r/20210922165101.18951-4-bp@alien8.de --- arch/x86/kernel/cpu/mce/amd.c | 10 ++-- arch/x86/kernel/cpu/mce/core.c | 95 +++++++++++++------------------------- arch/x86/kernel/cpu/mce/internal.h | 12 ++--- 3 files changed, 42 insertions(+), 75 deletions(-) diff --git a/arch/x86/kernel/cpu/mce/amd.c b/arch/x86/kernel/cpu/mce/amd.c index 08831ac..27cacf5 100644 --- a/arch/x86/kernel/cpu/mce/amd.c +++ b/arch/x86/kernel/cpu/mce/amd.c @@ -526,7 +526,7 @@ static u32 get_block_address(u32 current_addr, u32 low, u32 high, /* Fall back to method we used for older processors: */ switch (block) { case 0: - addr = msr_ops.misc(bank); + addr = mca_msr_reg(bank, MCA_MISC); break; case 1: offset = ((low & MASK_BLKPTR_LO) >> 21); @@ -978,8 +978,8 @@ static void log_error_deferred(unsigned int bank) { bool defrd; - defrd = _log_error_bank(bank, msr_ops.status(bank), - msr_ops.addr(bank), 0); + defrd = _log_error_bank(bank, mca_msr_reg(bank, MCA_STATUS), + mca_msr_reg(bank, MCA_ADDR), 0); if (!mce_flags.smca) return; @@ -1009,7 +1009,7 @@ static void amd_deferred_error_interrupt(void) static void log_error_thresholding(unsigned int bank, u64 misc) { - _log_error_bank(bank, msr_ops.status(bank), msr_ops.addr(bank), misc); + _log_error_bank(bank, mca_msr_reg(bank, MCA_STATUS), mca_msr_reg(bank, MCA_ADDR), misc); } static void log_and_reset_block(struct threshold_block *block) @@ -1397,7 +1397,7 @@ static int threshold_create_bank(struct threshold_bank **bp, unsigned int cpu, } } - err = allocate_threshold_blocks(cpu, b, bank, 0, msr_ops.misc(bank)); + err = allocate_threshold_blocks(cpu, b, bank, 0, mca_msr_reg(bank, MCA_MISC)); if (err) goto out_kobj; diff --git a/arch/x86/kernel/cpu/mce/core.c b/arch/x86/kernel/cpu/mce/core.c index 7aff9a5..8e766b2 100644 --- a/arch/x86/kernel/cpu/mce/core.c +++ b/arch/x86/kernel/cpu/mce/core.c @@ -176,53 +176,27 @@ void mce_unregister_decode_chain(struct notifier_block *nb) } EXPORT_SYMBOL_GPL(mce_unregister_decode_chain); -static inline u32 ctl_reg(int bank) +u32 mca_msr_reg(int bank, enum mca_msr reg) { - return MSR_IA32_MCx_CTL(bank); -} - -static inline u32 status_reg(int bank) -{ - return MSR_IA32_MCx_STATUS(bank); -} - -static inline u32 addr_reg(int bank) -{ - return MSR_IA32_MCx_ADDR(bank); -} - -static inline u32 misc_reg(int bank) -{ - return MSR_IA32_MCx_MISC(bank); -} - -static inline u32 smca_ctl_reg(int bank) -{ - return MSR_AMD64_SMCA_MCx_CTL(bank); -} - -static inline u32 smca_status_reg(int bank) -{ - return MSR_AMD64_SMCA_MCx_STATUS(bank); -} + if (mce_flags.smca) { + switch (reg) { + case MCA_CTL: return MSR_AMD64_SMCA_MCx_CTL(bank); + case MCA_ADDR: return MSR_AMD64_SMCA_MCx_ADDR(bank); + case MCA_MISC: return MSR_AMD64_SMCA_MCx_MISC(bank); + case MCA_STATUS: return MSR_AMD64_SMCA_MCx_STATUS(bank); + } + } -static inline u32 smca_addr_reg(int bank) -{ - return MSR_AMD64_SMCA_MCx_ADDR(bank); -} + switch (reg) { + case MCA_CTL: return MSR_IA32_MCx_CTL(bank); + case MCA_ADDR: return MSR_IA32_MCx_ADDR(bank); + case MCA_MISC: return MSR_IA32_MCx_MISC(bank); + case MCA_STATUS: return MSR_IA32_MCx_STATUS(bank); + } -static inline u32 smca_misc_reg(int bank) -{ - return MSR_AMD64_SMCA_MCx_MISC(bank); + return 0; } -struct mca_msr_regs msr_ops = { - .ctl = ctl_reg, - .status = status_reg, - .addr = addr_reg, - .misc = misc_reg -}; - static void __print_mce(struct mce *m) { pr_emerg(HW_ERR "CPU %d: Machine Check%s: %Lx Bank %d: %016Lx\n", @@ -362,11 +336,11 @@ static int msr_to_offset(u32 msr) if (msr == mca_cfg.rip_msr) return offsetof(struct mce, ip); - if (msr == msr_ops.status(bank)) + if (msr == mca_msr_reg(bank, MCA_STATUS)) return offsetof(struct mce, status); - if (msr == msr_ops.addr(bank)) + if (msr == mca_msr_reg(bank, MCA_ADDR)) return offsetof(struct mce, addr); - if (msr == msr_ops.misc(bank)) + if (msr == mca_msr_reg(bank, MCA_MISC)) return offsetof(struct mce, misc); if (msr == MSR_IA32_MCG_STATUS) return offsetof(struct mce, mcgstatus); @@ -685,10 +659,10 @@ static struct notifier_block mce_default_nb = { static void mce_read_aux(struct mce *m, int i) { if (m->status & MCI_STATUS_MISCV) - m->misc = mce_rdmsrl(msr_ops.misc(i)); + m->misc = mce_rdmsrl(mca_msr_reg(i, MCA_MISC)); if (m->status & MCI_STATUS_ADDRV) { - m->addr = mce_rdmsrl(msr_ops.addr(i)); + m->addr = mce_rdmsrl(mca_msr_reg(i, MCA_ADDR)); /* * Mask the reported address by the reported granularity. @@ -758,7 +732,7 @@ bool machine_check_poll(enum mcp_flags flags, mce_banks_t *b) m.bank = i; barrier(); - m.status = mce_rdmsrl(msr_ops.status(i)); + m.status = mce_rdmsrl(mca_msr_reg(i, MCA_STATUS)); /* If this entry is not valid, ignore it */ if (!(m.status & MCI_STATUS_VAL)) @@ -826,7 +800,7 @@ clear_it: /* * Clear state for this bank. */ - mce_wrmsrl(msr_ops.status(i), 0); + mce_wrmsrl(mca_msr_reg(i, MCA_STATUS), 0); } /* @@ -851,7 +825,7 @@ static int mce_no_way_out(struct mce *m, char **msg, unsigned long *validp, int i; for (i = 0; i < this_cpu_read(mce_num_banks); i++) { - m->status = mce_rdmsrl(msr_ops.status(i)); + m->status = mce_rdmsrl(mca_msr_reg(i, MCA_STATUS)); if (!(m->status & MCI_STATUS_VAL)) continue; @@ -1144,7 +1118,7 @@ static void mce_clear_state(unsigned long *toclear) for (i = 0; i < this_cpu_read(mce_num_banks); i++) { if (test_bit(i, toclear)) - mce_wrmsrl(msr_ops.status(i), 0); + mce_wrmsrl(mca_msr_reg(i, MCA_STATUS), 0); } } @@ -1203,7 +1177,7 @@ static void __mc_scan_banks(struct mce *m, struct pt_regs *regs, struct mce *fin m->addr = 0; m->bank = i; - m->status = mce_rdmsrl(msr_ops.status(i)); + m->status = mce_rdmsrl(mca_msr_reg(i, MCA_STATUS)); if (!(m->status & MCI_STATUS_VAL)) continue; @@ -1708,8 +1682,8 @@ static void __mcheck_cpu_init_clear_banks(void) if (!b->init) continue; - wrmsrl(msr_ops.ctl(i), b->ctl); - wrmsrl(msr_ops.status(i), 0); + wrmsrl(mca_msr_reg(i, MCA_CTL), b->ctl); + wrmsrl(mca_msr_reg(i, MCA_STATUS), 0); } } @@ -1735,7 +1709,7 @@ static void __mcheck_cpu_check_banks(void) if (!b->init) continue; - rdmsrl(msr_ops.ctl(i), msrval); + rdmsrl(mca_msr_reg(i, MCA_CTL), msrval); b->init = !!msrval; } } @@ -1894,13 +1868,6 @@ static void __mcheck_cpu_init_early(struct cpuinfo_x86 *c) mce_flags.succor = !!cpu_has(c, X86_FEATURE_SUCCOR); mce_flags.smca = !!cpu_has(c, X86_FEATURE_SMCA); mce_flags.amd_threshold = 1; - - if (mce_flags.smca) { - msr_ops.ctl = smca_ctl_reg; - msr_ops.status = smca_status_reg; - msr_ops.addr = smca_addr_reg; - msr_ops.misc = smca_misc_reg; - } } } @@ -2254,7 +2221,7 @@ static void mce_disable_error_reporting(void) struct mce_bank *b = &mce_banks[i]; if (b->init) - wrmsrl(msr_ops.ctl(i), 0); + wrmsrl(mca_msr_reg(i, MCA_CTL), 0); } return; } @@ -2606,7 +2573,7 @@ static void mce_reenable_cpu(void) struct mce_bank *b = &mce_banks[i]; if (b->init) - wrmsrl(msr_ops.ctl(i), b->ctl); + wrmsrl(mca_msr_reg(i, MCA_CTL), b->ctl); } } diff --git a/arch/x86/kernel/cpu/mce/internal.h b/arch/x86/kernel/cpu/mce/internal.h index d71d6c5..1ad7b4b 100644 --- a/arch/x86/kernel/cpu/mce/internal.h +++ b/arch/x86/kernel/cpu/mce/internal.h @@ -172,14 +172,14 @@ struct mce_vendor_flags { extern struct mce_vendor_flags mce_flags; -struct mca_msr_regs { - u32 (*ctl) (int bank); - u32 (*status) (int bank); - u32 (*addr) (int bank); - u32 (*misc) (int bank); +enum mca_msr { + MCA_CTL, + MCA_STATUS, + MCA_ADDR, + MCA_MISC, }; -extern struct mca_msr_regs msr_ops; +u32 mca_msr_reg(int bank, enum mca_msr reg); /* Decide whether to add MCE record to MCE event pool or filter it out. */ extern bool filter_mce(struct mce *m); -- 2.7.4