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efef7f184f
For historic reasons there are some TSC-related functions in the
<asm/msr.h> header, even though there's an <asm/tsc.h> header.
To facilitate the relocation of rdtsc{,_ordered}() from <asm/msr.h>
to <asm/tsc.h> and to eventually eliminate the inclusion of
<asm/msr.h> in <asm/tsc.h>, add an explicit <asm/msr.h> dependency
to the source files that reference definitions from <asm/msr.h>.
[ mingo: Clarified the changelog. ]
Signed-off-by: Xin Li (Intel) <xin@zytor.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Dave Hansen <dave.hansen@linux.intel.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Uros Bizjak <ubizjak@gmail.com>
Link: https://lore.kernel.org/r/20250501054241.1245648-1-xin@zytor.com
83 lines
1.5 KiB
C
83 lines
1.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/types.h>
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#include <linux/tick.h>
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#include <linux/percpu-defs.h>
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#include <xen/xen.h>
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#include <xen/interface/xen.h>
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#include <xen/grant_table.h>
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#include <xen/events.h>
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#include <asm/cpufeatures.h>
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#include <asm/msr-index.h>
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#include <asm/xen/hypercall.h>
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#include <asm/xen/page.h>
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#include <asm/fixmap.h>
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#include <asm/msr.h>
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#include "xen-ops.h"
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static DEFINE_PER_CPU(u64, spec_ctrl);
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void xen_arch_pre_suspend(void)
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{
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xen_save_time_memory_area();
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if (xen_pv_domain())
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xen_pv_pre_suspend();
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}
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void xen_arch_post_suspend(int cancelled)
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{
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if (xen_pv_domain())
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xen_pv_post_suspend(cancelled);
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else
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xen_hvm_post_suspend(cancelled);
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xen_restore_time_memory_area();
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}
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static void xen_vcpu_notify_restore(void *data)
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{
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if (xen_pv_domain() && boot_cpu_has(X86_FEATURE_SPEC_CTRL))
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wrmsrq(MSR_IA32_SPEC_CTRL, this_cpu_read(spec_ctrl));
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/* Boot processor notified via generic timekeeping_resume() */
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if (smp_processor_id() == 0)
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return;
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tick_resume_local();
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}
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static void xen_vcpu_notify_suspend(void *data)
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{
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u64 tmp;
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tick_suspend_local();
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if (xen_pv_domain() && boot_cpu_has(X86_FEATURE_SPEC_CTRL)) {
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rdmsrq(MSR_IA32_SPEC_CTRL, tmp);
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this_cpu_write(spec_ctrl, tmp);
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wrmsrq(MSR_IA32_SPEC_CTRL, 0);
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}
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}
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void xen_arch_resume(void)
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{
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int cpu;
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on_each_cpu(xen_vcpu_notify_restore, NULL, 1);
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for_each_online_cpu(cpu)
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xen_pmu_init(cpu);
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}
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void xen_arch_suspend(void)
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{
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int cpu;
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for_each_online_cpu(cpu)
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xen_pmu_finish(cpu);
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on_each_cpu(xen_vcpu_notify_suspend, NULL, 1);
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}
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