[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[PULL 03/21] target/i386: Added VGIF feature
From: |
Paolo Bonzini |
Subject: |
[PULL 03/21] target/i386: Added VGIF feature |
Date: |
Mon, 13 Sep 2021 13:57:24 +0200 |
From: Lara Lazier <laramglazier@gmail.com>
VGIF allows STGI and CLGI to execute in guest mode and control virtual
interrupts in guest mode.
When the VGIF feature is enabled then:
* executing STGI in the guest sets bit 9 of the VMCB offset 60h.
* executing CLGI in the guest clears bit 9 of the VMCB offset 60h.
Signed-off-by: Lara Lazier <laramglazier@gmail.com>
Message-Id: <20210730070742.9674-1-laramglazier@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
target/i386/cpu.c | 3 ++-
target/i386/svm.h | 6 ++++++
target/i386/tcg/sysemu/svm_helper.c | 31 +++++++++++++++++++++++++++--
3 files changed, 37 insertions(+), 3 deletions(-)
diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index fbca4e5860..86064ea1f9 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -631,7 +631,8 @@ void x86_cpu_vendor_words2str(char *dst, uint32_t vendor1,
#define TCG_EXT3_FEATURES (CPUID_EXT3_LAHF_LM | CPUID_EXT3_SVM | \
CPUID_EXT3_CR8LEG | CPUID_EXT3_ABM | CPUID_EXT3_SSE4A)
#define TCG_EXT4_FEATURES 0
-#define TCG_SVM_FEATURES CPUID_SVM_NPT
+#define TCG_SVM_FEATURES (CPUID_SVM_NPT | CPUID_SVM_VGIF | \
+ CPUID_SVM_SVME_ADDR_CHK)
#define TCG_KVM_FEATURES 0
#define TCG_7_0_EBX_FEATURES (CPUID_7_0_EBX_SMEP | CPUID_7_0_EBX_SMAP | \
CPUID_7_0_EBX_BMI1 | CPUID_7_0_EBX_BMI2 | CPUID_7_0_EBX_ADX | \
diff --git a/target/i386/svm.h b/target/i386/svm.h
index adc058dc76..036597a2ff 100644
--- a/target/i386/svm.h
+++ b/target/i386/svm.h
@@ -9,6 +9,12 @@
#define V_IRQ_SHIFT 8
#define V_IRQ_MASK (1 << V_IRQ_SHIFT)
+#define V_GIF_ENABLED_SHIFT 25
+#define V_GIF_ENABLED_MASK (1 << V_GIF_ENABLED_SHIFT)
+
+#define V_GIF_SHIFT 9
+#define V_GIF_MASK (1 << V_GIF_SHIFT)
+
#define V_INTR_PRIO_SHIFT 16
#define V_INTR_PRIO_MASK (0x0f << V_INTR_PRIO_SHIFT)
diff --git a/target/i386/tcg/sysemu/svm_helper.c
b/target/i386/tcg/sysemu/svm_helper.c
index 0e7de4e054..66c2c1e61f 100644
--- a/target/i386/tcg/sysemu/svm_helper.c
+++ b/target/i386/tcg/sysemu/svm_helper.c
@@ -121,6 +121,17 @@ static inline bool is_efer_invalid_state (CPUX86State *env)
return false;
}
+static inline bool virtual_gif_enabled(CPUX86State *env, uint32_t *int_ctl)
+{
+ if (likely(env->hflags & HF_GUEST_MASK)) {
+ *int_ctl = x86_ldl_phys(env_cpu(env),
+ env->vm_vmcb + offsetof(struct vmcb, control.int_ctl));
+ return (env->features[FEAT_SVM] & CPUID_SVM_VGIF)
+ && (*int_ctl & V_GIF_ENABLED_MASK);
+ }
+ return false;
+}
+
void helper_vmrun(CPUX86State *env, int aflag, int next_eip_addend)
{
CPUState *cs = env_cpu(env);
@@ -510,13 +521,29 @@ void helper_vmsave(CPUX86State *env, int aflag)
void helper_stgi(CPUX86State *env)
{
cpu_svm_check_intercept_param(env, SVM_EXIT_STGI, 0, GETPC());
- env->hflags2 |= HF2_GIF_MASK;
+
+ CPUState *cs = env_cpu(env);
+ uint32_t int_ctl;
+ if (virtual_gif_enabled(env, &int_ctl)) {
+ x86_stl_phys(cs, env->vm_vmcb + offsetof(struct vmcb, control.int_ctl),
+ int_ctl | V_GIF_MASK);
+ } else {
+ env->hflags2 |= HF2_GIF_MASK;
+ }
}
void helper_clgi(CPUX86State *env)
{
cpu_svm_check_intercept_param(env, SVM_EXIT_CLGI, 0, GETPC());
- env->hflags2 &= ~HF2_GIF_MASK;
+
+ CPUState *cs = env_cpu(env);
+ uint32_t int_ctl;
+ if (virtual_gif_enabled(env, &int_ctl)) {
+ x86_stl_phys(cs, env->vm_vmcb + offsetof(struct vmcb, control.int_ctl),
+ int_ctl & ~V_GIF_MASK);
+ } else {
+ env->hflags2 &= ~HF2_GIF_MASK;
+ }
}
bool cpu_svm_has_intercept(CPUX86State *env, uint32_t type)
--
2.31.1
- [PULL 00/21] x86, docs, meson changes for 2021-09-13, Paolo Bonzini, 2021/09/13
- [PULL 01/21] target/i386: add missing bits to CR4_RESERVED_MASK, Paolo Bonzini, 2021/09/13
- [PULL 02/21] target/i386: VMRUN and VMLOAD canonicalizations, Paolo Bonzini, 2021/09/13
- [PULL 03/21] target/i386: Added VGIF feature,
Paolo Bonzini <=
- [PULL 08/21] target/i386: Added vVMLOAD and vVMSAVE feature, Paolo Bonzini, 2021/09/13
- [PULL 10/21] docs: standardize directory index to --- with overline, Paolo Bonzini, 2021/09/13
- [PULL 11/21] docs/system: standardize man page sections to --- with overline, Paolo Bonzini, 2021/09/13
- [PULL 06/21] target/i386: Added ignore TPR check in ctl_has_irq, Paolo Bonzini, 2021/09/13
- [PULL 09/21] docs: standardize book titles to === with overline, Paolo Bonzini, 2021/09/13
- [PULL 12/21] docs/system: move x86 CPU configuration to a separate document, Paolo Bonzini, 2021/09/13
- [PULL 19/21] Only check CONFIG_NVMM when NEED_CPU_H is defined, Paolo Bonzini, 2021/09/13
- [PULL 04/21] target/i386: Moved int_ctl into CPUX86State structure, Paolo Bonzini, 2021/09/13
- [PULL 14/21] meson: look up cp and dtrace with find_program(), Paolo Bonzini, 2021/09/13
- [PULL 16/21] meson: remove dead variable, Paolo Bonzini, 2021/09/13