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x86/paravirt: Move the pv_irq_ops under the PARAVIRT_XXL umbrella

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All of the paravirt ops defined in pv_irq_ops are for Xen PV guests
or VSMP only. Define them only if CONFIG_PARAVIRT_XXL is set.

Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: xen-devel@lists.xenproject.org
Cc: virtualization@lists.linux-foundation.org
Cc: akataria@vmware.com
Cc: rusty@rustcorp.com.au
Cc: boris.ostrovsky@oracle.com
Cc: hpa@zytor.com
Link: https://lkml.kernel.org/r/20180828074026.820-14-jgross@suse.com
This commit is contained in:
Juergen Gross 2018-08-28 09:40:24 +02:00 committed by Thomas Gleixner
parent 9bad5658ea
commit 6da63eb241
9 changed files with 15 additions and 18 deletions
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8
arch/x86/include/asm/irqflags.h
View File

@ -64,7 +64,7 @@ static inline __cpuidle void native_halt(void)
#endif
#ifdef CONFIG_PARAVIRT
#ifdef CONFIG_PARAVIRT_XXL
#include <asm/paravirt.h>
#else
#ifndef __ASSEMBLY__
@ -126,13 +126,7 @@ static inline notrace unsigned long arch_local_irq_save(void)
#ifdef CONFIG_DEBUG_ENTRY
#define SAVE_FLAGS(x) pushfq; popq %rax
#endif
#endif
#endif /* __ASSEMBLY__ */
#endif /* CONFIG_PARAVIRT */
#ifndef CONFIG_PARAVIRT_XXL
#ifdef __ASSEMBLY__
#ifdef CONFIG_X86_64
#define SWAPGS swapgs
/*
* Currently paravirt can't handle swapgs nicely when we

6
arch/x86/include/asm/paravirt.h
View File

@ -91,7 +91,6 @@ static inline void write_cr8(unsigned long x)
PVOP_VCALL1(cpu.write_cr8, x);
}
#endif
#endif
static inline void arch_safe_halt(void)
{
@ -103,7 +102,6 @@ static inline void halt(void)
PVOP_VCALL0(irq.halt);
}
#ifdef CONFIG_PARAVIRT_XXL
static inline void wbinvd(void)
{
PVOP_VCALL0(cpu.wbinvd);
@ -770,6 +768,7 @@ bool __raw_callee_save___native_vcpu_is_preempted(long cpu);
#define __PV_IS_CALLEE_SAVE(func) \
((struct paravirt_callee_save) { func })
#ifdef CONFIG_PARAVIRT_XXL
static inline notrace unsigned long arch_local_save_flags(void)
{
return PVOP_CALLEE0(unsigned long, irq.save_fl);
@ -798,6 +797,7 @@ static inline notrace unsigned long arch_local_irq_save(void)
arch_local_irq_disable();
return f;
}
#endif
/* Make sure as little as possible of this mess escapes. */
@ -884,7 +884,6 @@ extern void default_banner(void);
PARA_SITE(PARA_PATCH(PV_CPU_iret), \
ANNOTATE_RETPOLINE_SAFE; \
jmp PARA_INDIRECT(pv_ops+PV_CPU_iret);)
#endif
#define DISABLE_INTERRUPTS(clobbers) \
PARA_SITE(PARA_PATCH(PV_IRQ_irq_disable), \
@ -899,6 +898,7 @@ extern void default_banner(void);
ANNOTATE_RETPOLINE_SAFE; \
call PARA_INDIRECT(pv_ops+PV_IRQ_irq_enable); \
PV_RESTORE_REGS(clobbers | CLBR_CALLEE_SAVE);)
#endif
#ifdef CONFIG_X86_64
#ifdef CONFIG_PARAVIRT_XXL

3
arch/x86/include/asm/paravirt_types.h
View File

@ -184,6 +184,7 @@ struct pv_cpu_ops {
} __no_randomize_layout;
struct pv_irq_ops {
#ifdef CONFIG_PARAVIRT_XXL
/*
* Get/set interrupt state. save_fl and restore_fl are only
* expected to use X86_EFLAGS_IF; all other bits
@ -200,7 +201,7 @@ struct pv_irq_ops {
void (*safe_halt)(void);
void (*halt)(void);
#endif
} __no_randomize_layout;
struct pv_mmu_ops {

2
arch/x86/kernel/asm-offsets.c
View File

@ -66,9 +66,9 @@ void common(void) {
#ifdef CONFIG_PARAVIRT
BLANK();
#ifdef CONFIG_PARAVIRT_XXL
OFFSET(PV_IRQ_irq_disable, paravirt_patch_template, irq.irq_disable);
OFFSET(PV_IRQ_irq_enable, paravirt_patch_template, irq.irq_enable);
#ifdef CONFIG_PARAVIRT_XXL
OFFSET(PV_CPU_iret, paravirt_patch_template, cpu.iret);
#endif
OFFSET(PV_MMU_read_cr2, paravirt_patch_template, mmu.read_cr2);

2
arch/x86/kernel/asm-offsets_64.c
View File

@ -25,9 +25,9 @@ int main(void)
OFFSET(PV_CPU_usergs_sysret64, paravirt_patch_template,
cpu.usergs_sysret64);
OFFSET(PV_CPU_swapgs, paravirt_patch_template, cpu.swapgs);
#endif
#ifdef CONFIG_DEBUG_ENTRY
OFFSET(PV_IRQ_save_fl, paravirt_patch_template, irq.save_fl);
#endif
#endif
BLANK();
#endif

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

@ -373,7 +373,6 @@ struct paravirt_patch_template pv_ops = {
.cpu.start_context_switch = paravirt_nop,
.cpu.end_context_switch = paravirt_nop,
#endif /* CONFIG_PARAVIRT_XXL */
/* Irq ops. */
.irq.save_fl = __PV_IS_CALLEE_SAVE(native_save_fl),
@ -382,6 +381,7 @@ struct paravirt_patch_template pv_ops = {
.irq.irq_enable = __PV_IS_CALLEE_SAVE(native_irq_enable),
.irq.safe_halt = native_safe_halt,
.irq.halt = native_halt,
#endif /* CONFIG_PARAVIRT_XXL */
/* Mmu ops. */
.mmu.read_cr2 = native_read_cr2,

4
arch/x86/kernel/paravirt_patch_32.c
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@ -1,11 +1,11 @@
// SPDX-License-Identifier: GPL-2.0
#include <asm/paravirt.h>
#ifdef CONFIG_PARAVIRT_XXL
DEF_NATIVE(irq, irq_disable, "cli");
DEF_NATIVE(irq, irq_enable, "sti");
DEF_NATIVE(irq, restore_fl, "push %eax; popf");
DEF_NATIVE(irq, save_fl, "pushf; pop %eax");
#ifdef CONFIG_PARAVIRT_XXL
DEF_NATIVE(cpu, iret, "iret");
#endif
DEF_NATIVE(mmu, read_cr2, "mov %cr2, %eax");
@ -43,11 +43,11 @@ unsigned native_patch(u8 type, void *ibuf, unsigned long addr, unsigned len)
end = end_##ops##_##x; \
goto patch_site
switch (type) {
#ifdef CONFIG_PARAVIRT_XXL
PATCH_SITE(irq, irq_disable);
PATCH_SITE(irq, irq_enable);
PATCH_SITE(irq, restore_fl);
PATCH_SITE(irq, save_fl);
#ifdef CONFIG_PARAVIRT_XXL
PATCH_SITE(cpu, iret);
#endif
PATCH_SITE(mmu, read_cr2);

4
arch/x86/kernel/paravirt_patch_64.c
View File

@ -3,10 +3,12 @@
#include <asm/asm-offsets.h>
#include <linux/stringify.h>
#ifdef CONFIG_PARAVIRT_XXL
DEF_NATIVE(irq, irq_disable, "cli");
DEF_NATIVE(irq, irq_enable, "sti");
DEF_NATIVE(irq, restore_fl, "pushq %rdi; popfq");
DEF_NATIVE(irq, save_fl, "pushfq; popq %rax");
#endif
DEF_NATIVE(mmu, read_cr2, "movq %cr2, %rax");
DEF_NATIVE(mmu, read_cr3, "movq %cr3, %rax");
DEF_NATIVE(mmu, write_cr3, "movq %rdi, %cr3");
@ -51,11 +53,11 @@ unsigned native_patch(u8 type, void *ibuf, unsigned long addr, unsigned len)
end = end_##ops##_##x; \
goto patch_site
switch(type) {
#ifdef CONFIG_PARAVIRT_XXL
PATCH_SITE(irq, restore_fl);
PATCH_SITE(irq, save_fl);
PATCH_SITE(irq, irq_enable);
PATCH_SITE(irq, irq_disable);
#ifdef CONFIG_PARAVIRT_XXL
PATCH_SITE(cpu, usergs_sysret64);
PATCH_SITE(cpu, swapgs);
PATCH_SITE(cpu, wbinvd);

2
arch/x86/kernel/vsmp_64.c
View File

@ -26,7 +26,7 @@
#define TOPOLOGY_REGISTER_OFFSET 0x10
#if defined CONFIG_PCI && defined CONFIG_PARAVIRT
#if defined CONFIG_PCI && defined CONFIG_PARAVIRT_XXL
/*
* Interrupt control on vSMPowered systems:
* ~AC is a shadow of IF. If IF is 'on' AC should be 'off'