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x86: Convert some slow-path static_cpu_has() callers to boot_cpu_has() 

Using static_cpu_has() is pointless on those paths, convert them to the
boot_cpu_has() variant.

No functional changes.

Reported-by: Nadav Amit <nadav.amit@gmail.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Rik van Riel <riel@surriel.com>
Reviewed-by: Juergen Gross <jgross@suse.com> # for paravirt
Cc: Aubrey Li <aubrey.li@intel.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Dominik Brodowski <linux@dominikbrodowski.net>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jann Horn <jannh@google.com>
Cc: Joerg Roedel <jroedel@suse.de>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Thomas Lendacky <Thomas.Lendacky@amd.com>
Cc: linux-edac@vger.kernel.org
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: virtualization@lists.linux-foundation.org
Cc: x86@kernel.org
Link: https://lkml.kernel.org/r/20190330112022.28888-3-bp@alien8.de
This commit is contained in:
Borislav Petkov 2019-03-29 19:52:59 +01:00
parent bfdd5a67c8
commit 67e87d43b7
11 changed files with 26 additions and 27 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
arch/x86/include/asm/fpu/internal.h
View File

@ -253,7 +253,7 @@ static inline void copy_xregs_to_kernel_booting(struct xregs_state *xstate)
WARN_ON(system_state != SYSTEM_BOOTING);
if (static_cpu_has(X86_FEATURE_XSAVES))
if (boot_cpu_has(X86_FEATURE_XSAVES))
XSTATE_OP(XSAVES, xstate, lmask, hmask, err);
else
XSTATE_OP(XSAVE, xstate, lmask, hmask, err);
@ -275,7 +275,7 @@ static inline void copy_kernel_to_xregs_booting(struct xregs_state *xstate)
WARN_ON(system_state != SYSTEM_BOOTING);
if (static_cpu_has(X86_FEATURE_XSAVES))
if (boot_cpu_has(X86_FEATURE_XSAVES))
XSTATE_OP(XRSTORS, xstate, lmask, hmask, err);
else
XSTATE_OP(XRSTOR, xstate, lmask, hmask, err);
@ -497,8 +497,7 @@ static inline void fpregs_activate(struct fpu *fpu)
* - switch_fpu_finish() restores the new state as
* necessary.
*/
static inline void
switch_fpu_prepare(struct fpu *old_fpu, int cpu)
static inline void switch_fpu_prepare(struct fpu *old_fpu, int cpu)
{
if (static_cpu_has(X86_FEATURE_FPU) && old_fpu->initialized) {
if (!copy_fpregs_to_fpstate(old_fpu))

2
arch/x86/kernel/apic/apic_numachip.c
View File

@ -175,7 +175,7 @@ static void fixup_cpu_id(struct cpuinfo_x86 *c, int node)
this_cpu_write(cpu_llc_id, node);
/* Account for nodes per socket in multi-core-module processors */
if (static_cpu_has(X86_FEATURE_NODEID_MSR)) {
if (boot_cpu_has(X86_FEATURE_NODEID_MSR)) {
rdmsrl(MSR_FAM10H_NODE_ID, val);
nodes = ((val >> 3) & 7) + 1;
}

6
arch/x86/kernel/cpu/aperfmperf.c
View File

@ -83,7 +83,7 @@ unsigned int aperfmperf_get_khz(int cpu)
if (!cpu_khz)
return 0;
if (!static_cpu_has(X86_FEATURE_APERFMPERF))
if (!boot_cpu_has(X86_FEATURE_APERFMPERF))
return 0;
aperfmperf_snapshot_cpu(cpu, ktime_get(), true);
@ -99,7 +99,7 @@ void arch_freq_prepare_all(void)
if (!cpu_khz)
return;
if (!static_cpu_has(X86_FEATURE_APERFMPERF))
if (!boot_cpu_has(X86_FEATURE_APERFMPERF))
return;
for_each_online_cpu(cpu)
@ -115,7 +115,7 @@ unsigned int arch_freq_get_on_cpu(int cpu)
if (!cpu_khz)
return 0;
if (!static_cpu_has(X86_FEATURE_APERFMPERF))
if (!boot_cpu_has(X86_FEATURE_APERFMPERF))
return 0;
if (aperfmperf_snapshot_cpu(cpu, ktime_get(), true))

2
arch/x86/kernel/cpu/common.c
View File

@ -1668,7 +1668,7 @@ static void setup_getcpu(int cpu)
unsigned long cpudata = vdso_encode_cpunode(cpu, early_cpu_to_node(cpu));
struct desc_struct d = { };
if (static_cpu_has(X86_FEATURE_RDTSCP))
if (boot_cpu_has(X86_FEATURE_RDTSCP))
write_rdtscp_aux(cpudata);
/* Store CPU and node number in limit. */

2
arch/x86/kernel/cpu/mce/inject.c
View File

@ -528,7 +528,7 @@ static void do_inject(void)
* only on the node base core. Refer to D18F3x44[NbMcaToMstCpuEn] for
* Fam10h and later BKDGs.
*/
if (static_cpu_has(X86_FEATURE_AMD_DCM) &&
if (boot_cpu_has(X86_FEATURE_AMD_DCM) &&
b == 4 &&
boot_cpu_data.x86 < 0x17) {
toggle_nb_mca_mst_cpu(amd_get_nb_id(cpu));

10
arch/x86/kernel/cpu/proc.c
View File

@ -35,11 +35,11 @@ static void show_cpuinfo_misc(struct seq_file *m, struct cpuinfo_x86 *c)
"fpu_exception\t: %s\n"
"cpuid level\t: %d\n"
"wp\t\t: yes\n",
static_cpu_has_bug(X86_BUG_FDIV) ? "yes" : "no",
static_cpu_has_bug(X86_BUG_F00F) ? "yes" : "no",
static_cpu_has_bug(X86_BUG_COMA) ? "yes" : "no",
static_cpu_has(X86_FEATURE_FPU) ? "yes" : "no",
static_cpu_has(X86_FEATURE_FPU) ? "yes" : "no",
boot_cpu_has_bug(X86_BUG_FDIV) ? "yes" : "no",
boot_cpu_has_bug(X86_BUG_F00F) ? "yes" : "no",
boot_cpu_has_bug(X86_BUG_COMA) ? "yes" : "no",
boot_cpu_has(X86_FEATURE_FPU) ? "yes" : "no",
boot_cpu_has(X86_FEATURE_FPU) ? "yes" : "no",
c->cpuid_level);
}
#else

14
arch/x86/kernel/ldt.c
View File

@ -113,7 +113,7 @@ static void do_sanity_check(struct mm_struct *mm,
* tables.
*/
WARN_ON(!had_kernel_mapping);
if (static_cpu_has(X86_FEATURE_PTI))
if (boot_cpu_has(X86_FEATURE_PTI))
WARN_ON(!had_user_mapping);
} else {
/*
@ -121,7 +121,7 @@ static void do_sanity_check(struct mm_struct *mm,
* Sync the pgd to the usermode tables.
*/
WARN_ON(had_kernel_mapping);
if (static_cpu_has(X86_FEATURE_PTI))
if (boot_cpu_has(X86_FEATURE_PTI))
WARN_ON(had_user_mapping);
}
}
@ -156,7 +156,7 @@ static void map_ldt_struct_to_user(struct mm_struct *mm)
k_pmd = pgd_to_pmd_walk(k_pgd, LDT_BASE_ADDR);
u_pmd = pgd_to_pmd_walk(u_pgd, LDT_BASE_ADDR);
if (static_cpu_has(X86_FEATURE_PTI) && !mm->context.ldt)
if (boot_cpu_has(X86_FEATURE_PTI) && !mm->context.ldt)
set_pmd(u_pmd, *k_pmd);
}
@ -181,7 +181,7 @@ static void map_ldt_struct_to_user(struct mm_struct *mm)
{
pgd_t *pgd = pgd_offset(mm, LDT_BASE_ADDR);
if (static_cpu_has(X86_FEATURE_PTI) && !mm->context.ldt)
if (boot_cpu_has(X86_FEATURE_PTI) && !mm->context.ldt)
set_pgd(kernel_to_user_pgdp(pgd), *pgd);
}
@ -208,7 +208,7 @@ map_ldt_struct(struct mm_struct *mm, struct ldt_struct *ldt, int slot)
spinlock_t *ptl;
int i, nr_pages;
if (!static_cpu_has(X86_FEATURE_PTI))
if (!boot_cpu_has(X86_FEATURE_PTI))
return 0;
/*
@ -271,7 +271,7 @@ static void unmap_ldt_struct(struct mm_struct *mm, struct ldt_struct *ldt)
return;
/* LDT map/unmap is only required for PTI */
if (!static_cpu_has(X86_FEATURE_PTI))
if (!boot_cpu_has(X86_FEATURE_PTI))
return;
nr_pages = DIV_ROUND_UP(ldt->nr_entries * LDT_ENTRY_SIZE, PAGE_SIZE);
@ -311,7 +311,7 @@ static void free_ldt_pgtables(struct mm_struct *mm)
unsigned long start = LDT_BASE_ADDR;
unsigned long end = LDT_END_ADDR;
if (!static_cpu_has(X86_FEATURE_PTI))
if (!boot_cpu_has(X86_FEATURE_PTI))
return;
tlb_gather_mmu(&tlb, mm, start, end);

2
arch/x86/kernel/paravirt.c
View File

@ -121,7 +121,7 @@ DEFINE_STATIC_KEY_TRUE(virt_spin_lock_key);
void __init native_pv_lock_init(void)
{
if (!static_cpu_has(X86_FEATURE_HYPERVISOR))
if (!boot_cpu_has(X86_FEATURE_HYPERVISOR))
static_branch_disable(&virt_spin_lock_key);
}

4
arch/x86/kernel/process.c
View File

@ -236,7 +236,7 @@ static int get_cpuid_mode(void)
static int set_cpuid_mode(struct task_struct *task, unsigned long cpuid_enabled)
{
if (!static_cpu_has(X86_FEATURE_CPUID_FAULT))
if (!boot_cpu_has(X86_FEATURE_CPUID_FAULT))
return -ENODEV;
if (cpuid_enabled)
@ -666,7 +666,7 @@ static int prefer_mwait_c1_over_halt(const struct cpuinfo_x86 *c)
if (c->x86_vendor != X86_VENDOR_INTEL)
return 0;
if (!cpu_has(c, X86_FEATURE_MWAIT) || static_cpu_has_bug(X86_BUG_MONITOR))
if (!cpu_has(c, X86_FEATURE_MWAIT) || boot_cpu_has_bug(X86_BUG_MONITOR))
return 0;
return 1;

2
arch/x86/kernel/reboot.c
View File

@ -108,7 +108,7 @@ void __noreturn machine_real_restart(unsigned int type)
write_cr3(real_mode_header->trampoline_pgd);
/* Exiting long mode will fail if CR4.PCIDE is set. */
if (static_cpu_has(X86_FEATURE_PCID))
if (boot_cpu_has(X86_FEATURE_PCID))
cr4_clear_bits(X86_CR4_PCIDE);
#endif

2
arch/x86/kernel/vm86_32.c
View File

@ -369,7 +369,7 @@ static long do_sys_vm86(struct vm86plus_struct __user *user_vm86, bool plus)
preempt_disable();
tsk->thread.sp0 += 16;
if (static_cpu_has(X86_FEATURE_SEP)) {
if (boot_cpu_has(X86_FEATURE_SEP)) {
tsk->thread.sysenter_cs = 0;
refresh_sysenter_cs(&tsk->thread);
}