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| author | Lara Lazier <laramglazier@gmail.com> | 2021-08-05 13:08:23 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-09-13 13:56:26 +0200 |
| commit | b67e2796a132f912533a879a4fbe6acad4cbac1e (patch) | |
| tree | 889eb6dec55a323aaf0738e4c50b6e5a659daf80 /target | |
| parent | e3126a5c92913b2a7e06111c8f40af3596880302 (diff) | |
| download | qemu-b67e2796a132f912533a879a4fbe6acad4cbac1e.zip qemu-b67e2796a132f912533a879a4fbe6acad4cbac1e.tar.gz qemu-b67e2796a132f912533a879a4fbe6acad4cbac1e.tar.bz2 | |
target/i386: Added VGIF V_IRQ masking capability
VGIF provides masking capability for when virtual interrupts
are taken. (APM2)
Signed-off-by: Lara Lazier <laramglazier@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'target')
| -rw-r--r-- | target/i386/cpu.c | 7 | ||||
| -rw-r--r-- | target/i386/cpu.h | 2 | ||||
| -rw-r--r-- | target/i386/tcg/sysemu/svm_helper.c | 12 |
3 files changed, 19 insertions, 2 deletions
diff --git a/target/i386/cpu.c b/target/i386/cpu.c index ddc3b63..6b029f1 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -5657,6 +5657,7 @@ static void x86_cpu_reset(DeviceState *dev) /* init to reset state */ env->int_ctl = 0; env->hflags2 |= HF2_GIF_MASK; + env->hflags2 |= HF2_VGIF_MASK; env->hflags &= ~HF_GUEST_MASK; cpu_x86_update_cr0(env, 0x60000010); @@ -6540,10 +6541,12 @@ int x86_cpu_pending_interrupt(CPUState *cs, int interrupt_request) !(env->hflags & HF_INHIBIT_IRQ_MASK))))) { return CPU_INTERRUPT_HARD; #if !defined(CONFIG_USER_ONLY) - } else if ((interrupt_request & CPU_INTERRUPT_VIRQ) && + } else if (env->hflags2 & HF2_VGIF_MASK) { + if((interrupt_request & CPU_INTERRUPT_VIRQ) && (env->eflags & IF_MASK) && !(env->hflags & HF_INHIBIT_IRQ_MASK)) { - return CPU_INTERRUPT_VIRQ; + return CPU_INTERRUPT_VIRQ; + } #endif } } diff --git a/target/i386/cpu.h b/target/i386/cpu.h index 3dfe630..24e8ec5 100644 --- a/target/i386/cpu.h +++ b/target/i386/cpu.h @@ -203,6 +203,7 @@ typedef enum X86Seg { #define HF2_MPX_PR_SHIFT 5 /* BNDCFGx.BNDPRESERVE */ #define HF2_NPT_SHIFT 6 /* Nested Paging enabled */ #define HF2_IGNNE_SHIFT 7 /* Ignore CR0.NE=0 */ +#define HF2_VGIF_SHIFT 8 /* Can take VIRQ*/ #define HF2_GIF_MASK (1 << HF2_GIF_SHIFT) #define HF2_HIF_MASK (1 << HF2_HIF_SHIFT) @@ -212,6 +213,7 @@ typedef enum X86Seg { #define HF2_MPX_PR_MASK (1 << HF2_MPX_PR_SHIFT) #define HF2_NPT_MASK (1 << HF2_NPT_SHIFT) #define HF2_IGNNE_MASK (1 << HF2_IGNNE_SHIFT) +#define HF2_VGIF_MASK (1 << HF2_VGIF_SHIFT) #define CR0_PE_SHIFT 0 #define CR0_MP_SHIFT 1 diff --git a/target/i386/tcg/sysemu/svm_helper.c b/target/i386/tcg/sysemu/svm_helper.c index 24c58b6..4612dae 100644 --- a/target/i386/tcg/sysemu/svm_helper.c +++ b/target/i386/tcg/sysemu/svm_helper.c @@ -130,6 +130,11 @@ static inline bool virtual_gif_enabled(CPUX86State *env) return false; } +static inline bool virtual_gif_set(CPUX86State *env) +{ + return !virtual_gif_enabled(env) || (env->int_ctl & V_GIF_MASK); +} + void helper_vmrun(CPUX86State *env, int aflag, int next_eip_addend) { CPUState *cs = env_cpu(env); @@ -364,6 +369,10 @@ void helper_vmrun(CPUX86State *env, int aflag, int next_eip_addend) cs->interrupt_request |= CPU_INTERRUPT_VIRQ; } + if (virtual_gif_set(env)) { + env->hflags2 |= HF2_VGIF_MASK; + } + /* maybe we need to inject an event */ event_inj = x86_ldl_phys(cs, env->vm_vmcb + offsetof(struct vmcb, control.event_inj)); @@ -520,6 +529,7 @@ void helper_stgi(CPUX86State *env) if (virtual_gif_enabled(env)) { env->int_ctl |= V_GIF_MASK; + env->hflags2 |= HF2_VGIF_MASK; } else { env->hflags2 |= HF2_GIF_MASK; } @@ -531,6 +541,7 @@ void helper_clgi(CPUX86State *env) if (virtual_gif_enabled(env)) { env->int_ctl &= ~V_GIF_MASK; + env->hflags2 &= ~HF2_VGIF_MASK; } else { env->hflags2 &= ~HF2_GIF_MASK; } @@ -812,6 +823,7 @@ void do_vmexit(CPUX86State *env) env->vm_vmcb + offsetof(struct vmcb, control.event_inj), 0); env->hflags2 &= ~HF2_GIF_MASK; + env->hflags2 &= ~HF2_VGIF_MASK; /* FIXME: Resets the current ASID register to zero (host ASID). */ /* Clears the V_IRQ and V_INTR_MASKING bits inside the processor. */ |