[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [XEN PATCH v3 1/2] x86/hvm: introduce config option for ACPI PM timer
Introduce config option X86_HVM_PMTIMER and make pmtimer emulation driver configurable and possible to disable on systems that don't need it. Option X86_X86_HVM_PMTIMER depends on HVM option, because this driver is part of HVM support code. Introduced additional check of domain's emulation flags, to cover the case when user explicitly states the requirement of emulated devices that are disabled in the build. HVM always require these devices to be present so domains of this type can't be created when pmtimer or any other emulated device are disabled. Suggested-by: Roger Pau Monné <roger.pau@xxxxxxxxxx> # approach Signed-off-by: Sergiy Kibrik <Sergiy_Kibrik@xxxxxxxx> Reviewed-by: Stefano Stabellini <sstabellini@xxxxxxxxxx> CC: Jan Beulich <jbeulich@xxxxxxxx> --- changes in v3: - changed config option's description - fixed bug in emulation_flags_ok() - modified build-time checks of X86_EMU_ALL vs XEN_X86_EMU_ALL - tags changes in v2: - updated description - renamed config option X86_PMTIMER -> X86_HVM_PMTIMER & moved related Kconfig changes to this patch - define X86_EMU_PM to 0 when !X86_HVM_PMTIMER - reverted changes to has_vpm() macro - moved emulation_flags_ok() checks to this patch - guard struct hvm_hw_acpi acpi attribute of struct domain --- xen/arch/x86/Kconfig | 13 +++++++++++++ xen/arch/x86/domain.c | 10 +++++++++- xen/arch/x86/hvm/Makefile | 2 +- xen/arch/x86/include/asm/acpi.h | 5 +++++ xen/arch/x86/include/asm/domain.h | 8 ++++++-- xen/arch/x86/include/asm/hvm/domain.h | 2 ++ xen/arch/x86/include/asm/hvm/vpt.h | 10 ++++++++++ 7 files changed, 46 insertions(+), 4 deletions(-) diff --git a/xen/arch/x86/Kconfig b/xen/arch/x86/Kconfig index 9cdd04721a..d8f108a3ca 100644 --- a/xen/arch/x86/Kconfig +++ b/xen/arch/x86/Kconfig @@ -144,6 +144,19 @@ config INTEL_VMX If your system includes a processor with Intel VT-x support, say Y. If in doubt, say Y. +menu "Emulated HVM devices support" + visible if EXPERT + depends on HVM + +config X86_HVM_PMTIMER + bool "ACPI PM timer emulation support" + default y + help + Build driver that emulates ACPI PM timer for HVM guests. + + If unsure, say Y. +endmenu + config XEN_SHSTK bool "Supervisor Shadow Stacks" depends on HAS_AS_CET_SS diff --git a/xen/arch/x86/domain.c b/xen/arch/x86/domain.c index 78a13e6812..d867b4f046 100644 --- a/xen/arch/x86/domain.c +++ b/xen/arch/x86/domain.c @@ -744,8 +744,16 @@ static bool emulation_flags_ok(const struct domain *d, uint32_t emflags) { #ifdef CONFIG_HVM /* This doesn't catch !CONFIG_HVM case but it is better than nothing */ - BUILD_BUG_ON(X86_EMU_ALL != XEN_X86_EMU_ALL); + BUILD_BUG_ON((X86_EMU_ALL & ~X86_EMU_PM) != + (XEN_X86_EMU_ALL & ~XEN_X86_EMU_PM)); #endif +#ifdef CONFIG_X86_HVM_PMTIMER + BUILD_BUG_ON(X86_EMU_PM != XEN_X86_EMU_PM); +#endif + + /* emflags contain non-supported bits */ + if ( (emflags & X86_EMU_ALL) != emflags ) + return false; if ( is_hvm_domain(d) ) { diff --git a/xen/arch/x86/hvm/Makefile b/xen/arch/x86/hvm/Makefile index 4c1fa5c6c2..3af8963218 100644 --- a/xen/arch/x86/hvm/Makefile +++ b/xen/arch/x86/hvm/Makefile @@ -18,7 +18,7 @@ obj-y += irq.o obj-y += monitor.o obj-y += mtrr.o obj-y += nestedhvm.o -obj-y += pmtimer.o +obj-$(CONFIG_X86_HVM_PMTIMER) += pmtimer.o obj-y += quirks.o obj-y += rtc.o obj-y += save.o diff --git a/xen/arch/x86/include/asm/acpi.h b/xen/arch/x86/include/asm/acpi.h index 217819dd61..eb2e4a1ede 100644 --- a/xen/arch/x86/include/asm/acpi.h +++ b/xen/arch/x86/include/asm/acpi.h @@ -150,8 +150,13 @@ void acpi_mmcfg_init(void); /* Incremented whenever we transition through S3. Value is 1 during boot. */ extern uint32_t system_reset_counter; +#ifdef CONFIG_X86_HVM_PMTIMER void hvm_acpi_power_button(struct domain *d); void hvm_acpi_sleep_button(struct domain *d); +#else +static inline void hvm_acpi_power_button(struct domain *d) {} +static inline void hvm_acpi_sleep_button(struct domain *d) {} +#endif /* suspend/resume */ void save_rest_processor_state(void); diff --git a/xen/arch/x86/include/asm/domain.h b/xen/arch/x86/include/asm/domain.h index b79d6badd7..8550473997 100644 --- a/xen/arch/x86/include/asm/domain.h +++ b/xen/arch/x86/include/asm/domain.h @@ -463,7 +463,6 @@ struct arch_domain #ifdef CONFIG_HVM #define X86_EMU_LAPIC XEN_X86_EMU_LAPIC #define X86_EMU_HPET XEN_X86_EMU_HPET -#define X86_EMU_PM XEN_X86_EMU_PM #define X86_EMU_RTC XEN_X86_EMU_RTC #define X86_EMU_IOAPIC XEN_X86_EMU_IOAPIC #define X86_EMU_PIC XEN_X86_EMU_PIC @@ -474,7 +473,6 @@ struct arch_domain #else #define X86_EMU_LAPIC 0 #define X86_EMU_HPET 0 -#define X86_EMU_PM 0 #define X86_EMU_RTC 0 #define X86_EMU_IOAPIC 0 #define X86_EMU_PIC 0 @@ -484,6 +482,12 @@ struct arch_domain #define X86_EMU_VPCI 0 #endif +#ifdef CONFIG_X86_HVM_PMTIMER +#define X86_EMU_PM XEN_X86_EMU_PM +#else +#define X86_EMU_PM 0 +#endif + #define X86_EMU_PIT XEN_X86_EMU_PIT /* This must match XEN_X86_EMU_ALL in xen.h */ diff --git a/xen/arch/x86/include/asm/hvm/domain.h b/xen/arch/x86/include/asm/hvm/domain.h index 333501d5f2..a4fddf7754 100644 --- a/xen/arch/x86/include/asm/hvm/domain.h +++ b/xen/arch/x86/include/asm/hvm/domain.h @@ -80,8 +80,10 @@ struct hvm_domain { * in public header files. * Internally, however, we will be using hvm_hw_acpi. */ +#ifdef CONFIG_X86_HVM_PMTIMER #define hvm_hw_acpi hvm_hw_pmtimer struct hvm_hw_acpi acpi; +#endif /* VCPU which is current target for 8259 interrupts. */ struct vcpu *i8259_target; diff --git a/xen/arch/x86/include/asm/hvm/vpt.h b/xen/arch/x86/include/asm/hvm/vpt.h index 0b92b28625..f24ef08925 100644 --- a/xen/arch/x86/include/asm/hvm/vpt.h +++ b/xen/arch/x86/include/asm/hvm/vpt.h @@ -187,10 +187,20 @@ void rtc_deinit(struct domain *d); void rtc_reset(struct domain *d); void rtc_update_clock(struct domain *d); +#ifdef CONFIG_X86_HVM_PMTIMER void pmtimer_init(struct vcpu *v); void pmtimer_deinit(struct domain *d); void pmtimer_reset(struct domain *d); int pmtimer_change_ioport(struct domain *d, uint64_t version); +#else +static inline void pmtimer_init(struct vcpu *v) {} +static inline void pmtimer_deinit(struct domain *d) {} +static inline void pmtimer_reset(struct domain *d) {} +static inline int pmtimer_change_ioport(struct domain *d, uint64_t version) +{ + return -ENODEV; +} +#endif void hpet_init(struct domain *d); void hpet_deinit(struct domain *d); -- 2.25.1
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