diff options
| -rw-r--r-- | arch/x86/include/asm/hyperv-tlfs.h | 11 | ||||
| -rw-r--r-- | arch/x86/include/asm/mshyperv.h | 30 | ||||
| -rw-r--r-- | arch/x86/kernel/cpu/mshyperv.c | 65 | ||||
| -rw-r--r-- | drivers/hv/hv.c | 18 |
4 files changed, 93 insertions, 31 deletions
diff --git a/arch/x86/include/asm/hyperv-tlfs.h b/arch/x86/include/asm/hyperv-tlfs.h index 724a2589c0e7..271d081dc251 100644 --- a/arch/x86/include/asm/hyperv-tlfs.h +++ b/arch/x86/include/asm/hyperv-tlfs.h @@ -228,6 +228,17 @@ enum hv_isolation_type { #define HV_REGISTER_SINT15 0x4000009F /* + * Define synthetic interrupt controller model specific registers for + * nested hypervisor. + */ +#define HV_REGISTER_NESTED_SCONTROL 0x40001080 +#define HV_REGISTER_NESTED_SVERSION 0x40001081 +#define HV_REGISTER_NESTED_SIEFP 0x40001082 +#define HV_REGISTER_NESTED_SIMP 0x40001083 +#define HV_REGISTER_NESTED_EOM 0x40001084 +#define HV_REGISTER_NESTED_SINT0 0x40001090 + +/* * Synthetic Timer MSRs. Four timers per vcpu. */ #define HV_REGISTER_STIMER0_CONFIG 0x400000B0 diff --git a/arch/x86/include/asm/mshyperv.h b/arch/x86/include/asm/mshyperv.h index 6d502f3efb0f..e3e91b4f299c 100644 --- a/arch/x86/include/asm/mshyperv.h +++ b/arch/x86/include/asm/mshyperv.h @@ -196,30 +196,10 @@ static inline bool hv_is_synic_reg(unsigned int reg) return false; } -static inline u64 hv_get_register(unsigned int reg) -{ - u64 value; - - if (hv_is_synic_reg(reg) && hv_isolation_type_snp()) - hv_ghcb_msr_read(reg, &value); - else - rdmsrl(reg, value); - return value; -} - -static inline void hv_set_register(unsigned int reg, u64 value) -{ - if (hv_is_synic_reg(reg) && hv_isolation_type_snp()) { - hv_ghcb_msr_write(reg, value); - - /* Write proxy bit via wrmsl instruction */ - if (reg >= HV_REGISTER_SINT0 && - reg <= HV_REGISTER_SINT15) - wrmsrl(reg, value | 1 << 20); - } else { - wrmsrl(reg, value); - } -} +u64 hv_get_register(unsigned int reg); +void hv_set_register(unsigned int reg, u64 value); +u64 hv_get_non_nested_register(unsigned int reg); +void hv_set_non_nested_register(unsigned int reg, u64 value); #else /* CONFIG_HYPERV */ static inline void hyperv_init(void) {} @@ -239,6 +219,8 @@ static inline int hyperv_flush_guest_mapping_range(u64 as, } static inline void hv_set_register(unsigned int reg, u64 value) { } static inline u64 hv_get_register(unsigned int reg) { return 0; } +static inline void hv_set_non_nested_register(unsigned int reg, u64 value) { } +static inline u64 hv_get_non_nested_register(unsigned int reg) { return 0; } static inline int hv_set_mem_host_visibility(unsigned long addr, int numpages, bool visible) { diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c index f9b78d4829e3..dedec2f23ad1 100644 --- a/arch/x86/kernel/cpu/mshyperv.c +++ b/arch/x86/kernel/cpu/mshyperv.c @@ -42,6 +42,71 @@ bool hv_nested; struct ms_hyperv_info ms_hyperv; #if IS_ENABLED(CONFIG_HYPERV) +static inline unsigned int hv_get_nested_reg(unsigned int reg) +{ + switch (reg) { + case HV_REGISTER_SIMP: + return HV_REGISTER_NESTED_SIMP; + case HV_REGISTER_SIEFP: + return HV_REGISTER_NESTED_SIEFP; + case HV_REGISTER_SVERSION: + return HV_REGISTER_NESTED_SVERSION; + case HV_REGISTER_SCONTROL: + return HV_REGISTER_NESTED_SCONTROL; + case HV_REGISTER_SINT0: + return HV_REGISTER_NESTED_SINT0; + case HV_REGISTER_EOM: + return HV_REGISTER_NESTED_EOM; + default: + return reg; + } +} + +u64 hv_get_non_nested_register(unsigned int reg) +{ + u64 value; + + if (hv_is_synic_reg(reg) && hv_isolation_type_snp()) + hv_ghcb_msr_read(reg, &value); + else + rdmsrl(reg, value); + return value; +} +EXPORT_SYMBOL_GPL(hv_get_non_nested_register); + +void hv_set_non_nested_register(unsigned int reg, u64 value) +{ + if (hv_is_synic_reg(reg) && hv_isolation_type_snp()) { + hv_ghcb_msr_write(reg, value); + + /* Write proxy bit via wrmsl instruction */ + if (reg >= HV_REGISTER_SINT0 && + reg <= HV_REGISTER_SINT15) + wrmsrl(reg, value | 1 << 20); + } else { + wrmsrl(reg, value); + } +} +EXPORT_SYMBOL_GPL(hv_set_non_nested_register); + +u64 hv_get_register(unsigned int reg) +{ + if (hv_nested) + reg = hv_get_nested_reg(reg); + + return hv_get_non_nested_register(reg); +} +EXPORT_SYMBOL_GPL(hv_get_register); + +void hv_set_register(unsigned int reg, u64 value) +{ + if (hv_nested) + reg = hv_get_nested_reg(reg); + + hv_set_non_nested_register(reg, value); +} +EXPORT_SYMBOL_GPL(hv_set_register); + static void (*vmbus_handler)(void); static void (*hv_stimer0_handler)(void); static void (*hv_kexec_handler)(void); diff --git a/drivers/hv/hv.c b/drivers/hv/hv.c index 4d6480d57546..8b0dd8e5244d 100644 --- a/drivers/hv/hv.c +++ b/drivers/hv/hv.c @@ -147,7 +147,7 @@ int hv_synic_alloc(void) * Synic message and event pages are allocated by paravisor. * Skip these pages allocation here. */ - if (!hv_isolation_type_snp()) { + if (!hv_isolation_type_snp() && !hv_root_partition) { hv_cpu->synic_message_page = (void *)get_zeroed_page(GFP_ATOMIC); if (hv_cpu->synic_message_page == NULL) { @@ -216,7 +216,7 @@ void hv_synic_enable_regs(unsigned int cpu) simp.as_uint64 = hv_get_register(HV_REGISTER_SIMP); simp.simp_enabled = 1; - if (hv_isolation_type_snp()) { + if (hv_isolation_type_snp() || hv_root_partition) { hv_cpu->synic_message_page = memremap(simp.base_simp_gpa << HV_HYP_PAGE_SHIFT, HV_HYP_PAGE_SIZE, MEMREMAP_WB); @@ -233,7 +233,7 @@ void hv_synic_enable_regs(unsigned int cpu) siefp.as_uint64 = hv_get_register(HV_REGISTER_SIEFP); siefp.siefp_enabled = 1; - if (hv_isolation_type_snp()) { + if (hv_isolation_type_snp() || hv_root_partition) { hv_cpu->synic_event_page = memremap(siefp.base_siefp_gpa << HV_HYP_PAGE_SHIFT, HV_HYP_PAGE_SIZE, MEMREMAP_WB); @@ -315,20 +315,24 @@ void hv_synic_disable_regs(unsigned int cpu) * addresses. */ simp.simp_enabled = 0; - if (hv_isolation_type_snp()) + if (hv_isolation_type_snp() || hv_root_partition) { memunmap(hv_cpu->synic_message_page); - else + hv_cpu->synic_message_page = NULL; + } else { simp.base_simp_gpa = 0; + } hv_set_register(HV_REGISTER_SIMP, simp.as_uint64); siefp.as_uint64 = hv_get_register(HV_REGISTER_SIEFP); siefp.siefp_enabled = 0; - if (hv_isolation_type_snp()) + if (hv_isolation_type_snp() || hv_root_partition) { memunmap(hv_cpu->synic_event_page); - else + hv_cpu->synic_event_page = NULL; + } else { siefp.base_siefp_gpa = 0; + } hv_set_register(HV_REGISTER_SIEFP, siefp.as_uint64); |