diff options
| author | Sean Christopherson <seanjc@google.com> | 2022-12-13 06:09:08 +0000 |
|---|---|---|
| committer | Sean Christopherson <seanjc@google.com> | 2023-01-24 10:36:27 -0800 |
| commit | 11633f69506d038120925691626f2851203af241 (patch) | |
| tree | 9abe5aef23e4ae410200ad3b5fadddf30316b8e2 | |
| parent | 8578f59657c505982e1d05232272c6bf304cf8aa (diff) | |
KVM: VMX: Always inline eVMCS read/write helpers
Tag all evmcs_{read,write}() helpers __always_inline so that they can be
freely used in noinstr sections, e.g. to get the VM-Exit reason in
vcpu_vmx_enter_exit() (in a future patch). For consistency and to avoid
more spot fixes in the future, e.g. see commit 010050a86393 ("x86/kvm:
Always inline evmcs_write64()"), tag all accessors even though
evmcs_read32() is the only anticipated use case in the near future. In
practice, non-KASAN builds are all but guaranteed to inline the helpers
anyways.
vmlinux.o: warning: objtool: vmx_vcpu_enter_exit+0x107: call to evmcs_read32()
leaves .noinstr.text section
Reported-by: kernel test robot <lkp@intel.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20221213060912.654668-4-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
| -rw-r--r-- | arch/x86/kvm/vmx/hyperv.h | 20 |
1 files changed, 10 insertions, 10 deletions
diff --git a/arch/x86/kvm/vmx/hyperv.h b/arch/x86/kvm/vmx/hyperv.h index ab08a9b9ab7d..caf658726169 100644 --- a/arch/x86/kvm/vmx/hyperv.h +++ b/arch/x86/kvm/vmx/hyperv.h @@ -196,7 +196,7 @@ static __always_inline void evmcs_write64(unsigned long field, u64 value) current_evmcs->hv_clean_fields &= ~clean_field; } -static inline void evmcs_write32(unsigned long field, u32 value) +static __always_inline void evmcs_write32(unsigned long field, u32 value) { u16 clean_field; int offset = get_evmcs_offset(field, &clean_field); @@ -208,7 +208,7 @@ static inline void evmcs_write32(unsigned long field, u32 value) current_evmcs->hv_clean_fields &= ~clean_field; } -static inline void evmcs_write16(unsigned long field, u16 value) +static __always_inline void evmcs_write16(unsigned long field, u16 value) { u16 clean_field; int offset = get_evmcs_offset(field, &clean_field); @@ -220,7 +220,7 @@ static inline void evmcs_write16(unsigned long field, u16 value) current_evmcs->hv_clean_fields &= ~clean_field; } -static inline u64 evmcs_read64(unsigned long field) +static __always_inline u64 evmcs_read64(unsigned long field) { int offset = get_evmcs_offset(field, NULL); @@ -230,7 +230,7 @@ static inline u64 evmcs_read64(unsigned long field) return *(u64 *)((char *)current_evmcs + offset); } -static inline u32 evmcs_read32(unsigned long field) +static __always_inline u32 evmcs_read32(unsigned long field) { int offset = get_evmcs_offset(field, NULL); @@ -240,7 +240,7 @@ static inline u32 evmcs_read32(unsigned long field) return *(u32 *)((char *)current_evmcs + offset); } -static inline u16 evmcs_read16(unsigned long field) +static __always_inline u16 evmcs_read16(unsigned long field) { int offset = get_evmcs_offset(field, NULL); @@ -274,11 +274,11 @@ static inline void evmcs_load(u64 phys_addr) void evmcs_sanitize_exec_ctrls(struct vmcs_config *vmcs_conf); #else /* !IS_ENABLED(CONFIG_HYPERV) */ static __always_inline void evmcs_write64(unsigned long field, u64 value) {} -static inline void evmcs_write32(unsigned long field, u32 value) {} -static inline void evmcs_write16(unsigned long field, u16 value) {} -static inline u64 evmcs_read64(unsigned long field) { return 0; } -static inline u32 evmcs_read32(unsigned long field) { return 0; } -static inline u16 evmcs_read16(unsigned long field) { return 0; } +static __always_inline void evmcs_write32(unsigned long field, u32 value) {} +static __always_inline void evmcs_write16(unsigned long field, u16 value) {} +static __always_inline u64 evmcs_read64(unsigned long field) { return 0; } +static __always_inline u32 evmcs_read32(unsigned long field) { return 0; } +static __always_inline u16 evmcs_read16(unsigned long field) { return 0; } static inline void evmcs_load(u64 phys_addr) {} static inline void evmcs_touch_msr_bitmap(void) {} #endif /* IS_ENABLED(CONFIG_HYPERV) */ |