diff options
| author |  Xin Li <xin3.li@intel.com>
| 2023-12-05 02:50:20 -0800 |
|---|---|---|
| committer |  Borislav Petkov (AMD) <bp@alien8.de>
| 2024-01-31 22:03:16 +0100 |
| commit | 2e670358ec1829238c99fbff178e285d3eb43ef1 (patch) | |
| tree | 23bb9894cd59296e66a6a8d99e945d3e7860803b /arch/x86/entry/entry_fred.c | |
| parent | x86/entry/calling: Allow PUSH_AND_CLEAR_REGS being used beyond actual entry code (diff) | |
| download | linux-2e670358ec1829238c99fbff178e285d3eb43ef1.tar.gz linux-2e670358ec1829238c99fbff178e285d3eb43ef1.tar.bz2 linux-2e670358ec1829238c99fbff178e285d3eb43ef1.zip | |
x86/entry: Add fred_entry_from_kvm() for VMX to handle IRQ/NMI
In IRQ/NMI induced VM exits, KVM VMX needs to execute the respective
handlers, which requires the software to create a FRED stack frame,
and use it to invoke the handlers. Add fred_irq_entry_from_kvm() for
this job.
Export fred_entry_from_kvm() because VMX can be compiled as a module.
Suggested-by: Sean Christopherson <seanjc@google.com>
Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Xin Li <xin3.li@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Tested-by: Shan Kang <shan.kang@intel.com>
Link: https://lore.kernel.org/r/20231205105030.8698-32-xin3.li@intel.com
Diffstat (limited to 'arch/x86/entry/entry_fred.c')
| -rw-r--r-- | arch/x86/entry/entry_fred.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/x86/entry/entry_fred.c b/arch/x86/entry/entry_fred.c index 3be0269bc0d4..6ecc08b6d72a 100644 --- a/arch/x86/entry/entry_fred.c +++ b/arch/x86/entry/entry_fred.c @@ -257,3 +257,17 @@ __visible noinstr void fred_entry_from_kernel(struct pt_regs *regs) return fred_bad_type(regs, error_code); } + +#if IS_ENABLED(CONFIG_KVM_INTEL) +__visible noinstr void __fred_entry_from_kvm(struct pt_regs *regs) +{ + switch (regs->fred_ss.type) { + case EVENT_TYPE_EXTINT: + return fred_extint(regs); + case EVENT_TYPE_NMI: + return fred_exc_nmi(regs); + default: + WARN_ON_ONCE(1); + } +} +#endif |