From: Joerg Roedel <joerg.roedel@amd.com>
To: Avi Kivity <avi@redhat.com>
Cc: Alexander Graf <agraf@suse.de>,
kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
Joerg Roedel <joerg.roedel@amd.com>
Subject: [PATCH 07/21] kvm/svm: cache nested intercepts
Date: Fri, 7 Aug 2009 11:49:34 +0200 [thread overview]
Message-ID: <1249638588-10982-8-git-send-email-joerg.roedel@amd.com> (raw)
In-Reply-To: <1249638588-10982-1-git-send-email-joerg.roedel@amd.com>
When the nested intercepts are cached we don't need to call
get_user_pages and/or map the nested vmcb on every nested #vmexit to
check who will handle the intercept.
Further this patch aligns the emulated svm behavior better to real
hardware.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
---
arch/x86/kvm/svm.c | 30 +++++++++++++++++++++++-------
1 files changed, 23 insertions(+), 7 deletions(-)
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index b4e2587..75fdfe7 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -80,6 +80,15 @@ struct nested_state {
/* gpa pointers to the real vectors */
u64 vmcb_msrpm;
+
+ /* cache for intercepts of the guest */
+ u16 intercept_cr_read;
+ u16 intercept_cr_write;
+ u16 intercept_dr_read;
+ u16 intercept_dr_write;
+ u32 intercept_exceptions;
+ u64 intercept;
+
};
struct vcpu_svm {
@@ -1455,7 +1464,6 @@ static int nested_svm_exit_handled_real(struct vcpu_svm *svm,
void *arg2,
void *opaque)
{
- struct vmcb *nested_vmcb = (struct vmcb *)arg1;
bool kvm_overrides = *(bool *)opaque;
u32 exit_code = svm->vmcb->control.exit_code;
@@ -1482,38 +1490,38 @@ static int nested_svm_exit_handled_real(struct vcpu_svm *svm,
switch (exit_code) {
case SVM_EXIT_READ_CR0 ... SVM_EXIT_READ_CR8: {
u32 cr_bits = 1 << (exit_code - SVM_EXIT_READ_CR0);
- if (nested_vmcb->control.intercept_cr_read & cr_bits)
+ if (svm->nested.intercept_cr_read & cr_bits)
return 1;
break;
}
case SVM_EXIT_WRITE_CR0 ... SVM_EXIT_WRITE_CR8: {
u32 cr_bits = 1 << (exit_code - SVM_EXIT_WRITE_CR0);
- if (nested_vmcb->control.intercept_cr_write & cr_bits)
+ if (svm->nested.intercept_cr_write & cr_bits)
return 1;
break;
}
case SVM_EXIT_READ_DR0 ... SVM_EXIT_READ_DR7: {
u32 dr_bits = 1 << (exit_code - SVM_EXIT_READ_DR0);
- if (nested_vmcb->control.intercept_dr_read & dr_bits)
+ if (svm->nested.intercept_dr_read & dr_bits)
return 1;
break;
}
case SVM_EXIT_WRITE_DR0 ... SVM_EXIT_WRITE_DR7: {
u32 dr_bits = 1 << (exit_code - SVM_EXIT_WRITE_DR0);
- if (nested_vmcb->control.intercept_dr_write & dr_bits)
+ if (svm->nested.intercept_dr_write & dr_bits)
return 1;
break;
}
case SVM_EXIT_EXCP_BASE ... SVM_EXIT_EXCP_BASE + 0x1f: {
u32 excp_bits = 1 << (exit_code - SVM_EXIT_EXCP_BASE);
- if (nested_vmcb->control.intercept_exceptions & excp_bits)
+ if (svm->nested.intercept_exceptions & excp_bits)
return 1;
break;
}
default: {
u64 exit_bits = 1ULL << (exit_code - SVM_EXIT_INTR);
nsvm_printk("exit code: 0x%x\n", exit_code);
- if (nested_vmcb->control.intercept & exit_bits)
+ if (svm->nested.intercept & exit_bits)
return 1;
}
}
@@ -1804,6 +1812,14 @@ static int nested_svm_vmrun(struct vcpu_svm *svm, void *arg1,
svm->nested.vmcb_msrpm = nested_vmcb->control.msrpm_base_pa;
+ /* cache intercepts */
+ svm->nested.intercept_cr_read = nested_vmcb->control.intercept_cr_read;
+ svm->nested.intercept_cr_write = nested_vmcb->control.intercept_cr_write;
+ svm->nested.intercept_dr_read = nested_vmcb->control.intercept_dr_read;
+ svm->nested.intercept_dr_write = nested_vmcb->control.intercept_dr_write;
+ svm->nested.intercept_exceptions = nested_vmcb->control.intercept_exceptions;
+ svm->nested.intercept = nested_vmcb->control.intercept;
+
force_new_asid(&svm->vcpu);
svm->vmcb->control.exit_int_info = nested_vmcb->control.exit_int_info;
svm->vmcb->control.exit_int_info_err = nested_vmcb->control.exit_int_info_err;
--
1.6.3.3
next prev parent reply other threads:[~2009-08-07 9:53 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-08-07 9:49 [PATCH 0/21] Nested SVM cleanups v2 Joerg Roedel
2009-08-07 9:49 ` [PATCH 01/21] kvm/svm: add helper functions for global interrupt flag Joerg Roedel
2009-08-07 9:49 ` [PATCH 02/21] kvm/svm: optimize nested #vmexit Joerg Roedel
2009-08-07 9:49 ` [PATCH 03/21] kvm/svm: optimize nested vmrun Joerg Roedel
2009-08-07 9:49 ` [PATCH 04/21] kvm/svm: copy only necessary parts of the control area on vmrun/vmexit Joerg Roedel
2009-08-07 9:49 ` [PATCH 05/21] kvm/svm: complete interrupts after handling nested exits Joerg Roedel
2009-08-07 9:49 ` [PATCH 06/21] kvm/svm: move nested svm state into seperate struct Joerg Roedel
2009-08-07 9:49 ` Joerg Roedel [this message]
2009-08-07 9:49 ` [PATCH 08/21] kvm/svm: consolidate nested_svm_exit_handled Joerg Roedel
2009-08-07 9:49 ` [PATCH 09/21] kvm/svm: do nested vmexit in nested_svm_exit_handled Joerg Roedel
2009-08-07 9:49 ` [PATCH 10/21] kvm/svm: simplify nested_svm_check_exception Joerg Roedel
2009-08-07 9:49 ` [PATCH 11/21] kvm/svm: get rid of nested_svm_vmexit_real Joerg Roedel
2009-08-07 9:49 ` [PATCH 12/21] kvm/svm: clean up nested_svm_exit_handled_msr Joerg Roedel
2009-08-07 9:49 ` [PATCH 13/21] kvm/svm: clean up nestec vmload/vmsave paths Joerg Roedel
2009-08-07 9:49 ` [PATCH 14/21] kvm/svm: clean up nested vmrun path Joerg Roedel
2009-08-07 9:49 ` [PATCH 15/21] kvm/svm: remove nested_svm_do and helper functions Joerg Roedel
2009-08-07 9:49 ` [PATCH 16/21] kvm/svm: handle errors in vmrun emulation path appropriatly Joerg Roedel
2009-08-07 9:49 ` [PATCH 17/21] kvm/svm: move special nested exit handling to separate function Joerg Roedel
2009-08-07 9:49 ` [PATCH 18/21] kvm/svm: remove unnecessary is_nested check from svm_cpu_run Joerg Roedel
2009-08-07 9:49 ` [PATCH 19/21] kvm/svm: move nested_svm_intr main logic out of if-clause Joerg Roedel
2009-08-07 9:49 ` [PATCH 20/21] kvm/svm: check for nested VINTR flag in svm_interrupt_allowed Joerg Roedel
2009-08-07 9:49 ` [PATCH 21/21] kvm/svm: enable nested svm by default Joerg Roedel
2009-08-09 9:41 ` [PATCH 0/21] Nested SVM cleanups v2 Avi Kivity
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