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| author | Peter Zijlstra <peterz@infradead.org> | 2021-06-24 11:41:16 +0200 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2021-09-17 13:14:39 +0200 |
| commit | 7361fac0465ba96ec8f7559459e3c70818ba6c78 (patch) | |
| tree | 18f1aac84fbca411ab1b871497c07db438cf5608 | |
| parent | f4afb713e5c3a4419ba7aaecc31a8c8bd91d13fb (diff) | |
| download | linux-7361fac0465ba96ec8f7559459e3c70818ba6c78.tar.bz2 | |
x86/xen: Make set_debugreg() noinstr
vmlinux.o: warning: objtool: pv_ops[2]: xen_set_debugreg
vmlinux.o: warning: objtool: pv_ops[2]: native_set_debugreg
vmlinux.o: warning: objtool: exc_debug()+0x3b: call to pv_ops[2]() leaves .noinstr.text section
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Juergen Gross <jgross@suse.com>
Link: https://lore.kernel.org/r/20210624095148.687755639@infradead.org
| -rw-r--r-- | arch/x86/include/asm/paravirt.h | 2 | ||||
| -rw-r--r-- | arch/x86/include/asm/xen/hypercall.h | 2 | ||||
| -rw-r--r-- | arch/x86/kernel/paravirt.c | 9 | ||||
| -rw-r--r-- | arch/x86/xen/enlighten_pv.c | 2 |
4 files changed, 9 insertions, 6 deletions
diff --git a/arch/x86/include/asm/paravirt.h b/arch/x86/include/asm/paravirt.h index f48465c66c31..34da790ac429 100644 --- a/arch/x86/include/asm/paravirt.h +++ b/arch/x86/include/asm/paravirt.h @@ -118,7 +118,7 @@ static __always_inline unsigned long paravirt_get_debugreg(int reg) return PVOP_CALL1(unsigned long, cpu.get_debugreg, reg); } #define get_debugreg(var, reg) var = paravirt_get_debugreg(reg) -static inline void set_debugreg(unsigned long val, int reg) +static __always_inline void set_debugreg(unsigned long val, int reg) { PVOP_VCALL2(cpu.set_debugreg, reg, val); } diff --git a/arch/x86/include/asm/xen/hypercall.h b/arch/x86/include/asm/xen/hypercall.h index af9220258d82..990b8aa179c8 100644 --- a/arch/x86/include/asm/xen/hypercall.h +++ b/arch/x86/include/asm/xen/hypercall.h @@ -308,7 +308,7 @@ HYPERVISOR_platform_op(struct xen_platform_op *op) return _hypercall1(int, platform_op, op); } -static inline int +static __always_inline int HYPERVISOR_set_debugreg(int reg, unsigned long value) { return _hypercall2(int, set_debugreg, reg, value); diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c index 8af526c41b34..cdaf8624ea1b 100644 --- a/arch/x86/kernel/paravirt.c +++ b/arch/x86/kernel/paravirt.c @@ -233,6 +233,11 @@ static noinstr unsigned long pv_native_get_debugreg(int regno) { return native_get_debugreg(regno); } + +static noinstr void pv_native_set_debugreg(int regno, unsigned long val) +{ + native_set_debugreg(regno, val); +} #endif enum paravirt_lazy_mode paravirt_get_lazy_mode(void) @@ -260,7 +265,7 @@ struct paravirt_patch_template pv_ops = { #ifdef CONFIG_PARAVIRT_XXL .cpu.cpuid = native_cpuid, .cpu.get_debugreg = pv_native_get_debugreg, - .cpu.set_debugreg = native_set_debugreg, + .cpu.set_debugreg = pv_native_set_debugreg, .cpu.read_cr0 = native_read_cr0, .cpu.write_cr0 = native_write_cr0, .cpu.write_cr4 = native_write_cr4, @@ -386,8 +391,6 @@ struct paravirt_patch_template pv_ops = { }; #ifdef CONFIG_PARAVIRT_XXL -/* At this point, native_get/set_debugreg has real function entries */ -NOKPROBE_SYMBOL(native_set_debugreg); NOKPROBE_SYMBOL(native_load_idt); void (*paravirt_iret)(void) = native_iret; diff --git a/arch/x86/xen/enlighten_pv.c b/arch/x86/xen/enlighten_pv.c index 273e1fa8537c..2b1a8ba71629 100644 --- a/arch/x86/xen/enlighten_pv.c +++ b/arch/x86/xen/enlighten_pv.c @@ -311,7 +311,7 @@ static void __init xen_init_capabilities(void) } } -static void xen_set_debugreg(int reg, unsigned long val) +static noinstr void xen_set_debugreg(int reg, unsigned long val) { HYPERVISOR_set_debugreg(reg, val); } |