LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Avi Kivity <avi@qumranet.com>
To: kvm-devel@lists.sourceforge.net
Cc: linux-kernel@vger.kernel.org, Joerg Roedel <joerg.roedel@amd.com>,
	Avi Kivity <avi@qumranet.com>
Subject: [PATCH 41/41] KVM: SVM: enable LBRV virtualization if available
Date: Sun,  1 Apr 2007 17:35:38 +0300	[thread overview]
Message-ID: <11754381403398-git-send-email-avi@qumranet.com> (raw)
In-Reply-To: <11754381393751-git-send-email-avi@qumranet.com>

From: Joerg Roedel <joerg.roedel@amd.com>

This patch enables the virtualization of the last branch record MSRs on
SVM if this feature is available in hardware. It also introduces a small
and simple check feature for specific SVM extensions.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
---
 drivers/kvm/svm.c |   13 +++++++++++++
 1 files changed, 13 insertions(+), 0 deletions(-)

diff --git a/drivers/kvm/svm.c b/drivers/kvm/svm.c
index 303e959..b7e1410 100644
--- a/drivers/kvm/svm.c
+++ b/drivers/kvm/svm.c
@@ -44,6 +44,10 @@ MODULE_LICENSE("GPL");
 #define KVM_EFER_LMA (1 << 10)
 #define KVM_EFER_LME (1 << 8)
 
+#define SVM_FEATURE_NPT  (1 << 0)
+#define SVM_FEATURE_LBRV (1 << 1)
+#define SVM_DEATURE_SVML (1 << 2)
+
 unsigned long iopm_base;
 unsigned long msrpm_base;
 
@@ -68,6 +72,7 @@ struct svm_cpu_data {
 };
 
 static DEFINE_PER_CPU(struct svm_cpu_data *, svm_data);
+static uint32_t svm_features;
 
 struct svm_init_data {
 	int cpu;
@@ -82,6 +87,11 @@ static u32 msrpm_ranges[] = {0, 0xc0000000, 0xc0010000};
 
 #define MAX_INST_SIZE 15
 
+static inline u32 svm_has(u32 feat)
+{
+	return svm_features & feat;
+}
+
 static unsigned get_addr_size(struct kvm_vcpu *vcpu)
 {
 	struct vmcb_save_area *sa = &vcpu->svm->vmcb->save;
@@ -302,6 +312,7 @@ static void svm_hardware_enable(void *garbage)
 	svm_data->asid_generation = 1;
 	svm_data->max_asid = cpuid_ebx(SVM_CPUID_FUNC) - 1;
 	svm_data->next_asid = svm_data->max_asid + 1;
+	svm_features = cpuid_edx(SVM_CPUID_FUNC);
 
 	asm volatile ( "sgdt %0" : "=m"(gdt_descr) );
 	gdt = (struct desc_struct *)gdt_descr.address;
@@ -511,6 +522,8 @@ static void init_vmcb(struct vmcb *vmcb)
 	control->msrpm_base_pa = msrpm_base;
 	control->tsc_offset = 0;
 	control->int_ctl = V_INTR_MASKING_MASK;
+	if (svm_has(SVM_FEATURE_LBRV))
+		control->lbr_ctl = 1ULL;
 
 	init_seg(&save->es);
 	init_seg(&save->ss);
-- 
1.5.0.5


      reply	other threads:[~2007-04-01 14:36 UTC|newest]

Thread overview: 42+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-04-01 14:34 [PATCH 00/41] kvm updates for 2.6.22 Avi Kivity
2007-04-01 14:34 ` [PATCH 01/41] KVM: Fix guest register corruption on paravirt hypercall Avi Kivity
2007-04-01 14:34   ` [PATCH 02/41] KVM: Use the generic skip_emulated_instruction() in hypercall code Avi Kivity
2007-04-01 14:35     ` [PATCH 03/41] KVM: Use own minor number Avi Kivity
2007-04-01 14:35       ` [PATCH 04/41] KVM: Export <linux/kvm.h> Avi Kivity
2007-04-01 14:35         ` [PATCH 05/41] KVM: Fix bogus sign extension in mmu mapping audit Avi Kivity
2007-04-01 14:35           ` [PATCH 06/41] KVM: Use a shared page for kernel/user communication when runing a vcpu Avi Kivity
2007-04-01 14:35             ` [PATCH 07/41] KVM: Do not communicate to userspace through cpu registers during PIO Avi Kivity
2007-04-01 14:35               ` [PATCH 08/41] KVM: Handle cpuid in the kernel instead of punting to userspace Avi Kivity
2007-04-01 14:35                 ` [PATCH 09/41] KVM: Remove the 'emulated' field from the userspace interface Avi Kivity
2007-04-01 14:35                   ` [PATCH 10/41] KVM: Remove minor wart from KVM_CREATE_VCPU ioctl Avi Kivity
2007-04-01 14:35                     ` [PATCH 11/41] KVM: Renumber ioctls Avi Kivity
2007-04-01 14:35                       ` [PATCH 12/41] KVM: Add method to check for backwards-compatible API extensions Avi Kivity
2007-04-01 14:35                         ` [PATCH 13/41] KVM: Allow userspace to process hypercalls which have no kernel handler Avi Kivity
2007-04-01 14:35                           ` [PATCH 14/41] KVM: Fold kvm_run::exit_type into kvm_run::exit_reason Avi Kivity
2007-04-01 14:35                             ` [PATCH 15/41] KVM: Add a special exit reason when exiting due to an interrupt Avi Kivity
2007-04-01 14:35                               ` [PATCH 16/41] KVM: Initialize the apic_base msr on svm too Avi Kivity
2007-04-01 14:35                                 ` [PATCH 17/41] KVM: Add guest mode signal mask Avi Kivity
2007-04-01 14:35                                   ` [PATCH 18/41] KVM: Allow kernel to select size of mmap() buffer Avi Kivity
2007-04-01 14:35                                     ` [PATCH 19/41] KVM: Future-proof argument-less ioctls Avi Kivity
2007-04-01 14:35                                       ` [PATCH 20/41] KVM: Avoid guest virtual addresses in string pio userspace interface Avi Kivity
2007-04-01 14:35                                         ` [PATCH 21/41] KVM: MMU: Remove unnecessary check for pdptr access Avi Kivity
2007-04-01 14:35                                           ` [PATCH 22/41] KVM: MMU: Remove global pte tracking Avi Kivity
2007-04-01 14:35                                             ` [PATCH 23/41] KVM: Workaround vmx inability to virtualize the reset state Avi Kivity
2007-04-01 14:35                                               ` [PATCH 24/41] KVM: Remove set_cr0_no_modeswitch() arch op Avi Kivity
2007-04-01 14:35                                                 ` [PATCH 25/41] KVM: Modify guest segments after potentially switching modes Avi Kivity
2007-04-01 14:35                                                   ` [PATCH 26/41] KVM: Hack real-mode segments on vmx from KVM_SET_SREGS Avi Kivity
2007-04-01 14:35                                                     ` [PATCH 27/41] KVM: Don't allow the guest to turn off the cpu cache Avi Kivity
2007-04-01 14:35                                                       ` [PATCH 28/41] KVM: Remove unused and write-only variables Avi Kivity
2007-04-01 14:35                                                         ` [PATCH 29/41] KVM: Handle writes to MCG_STATUS msr Avi Kivity
2007-04-01 14:35                                                           ` [PATCH 30/41] KVM: SVM: forbid guest to execute monitor/mwait Avi Kivity
2007-04-01 14:35                                                             ` [PATCH 31/41] KVM: MMU: Fix hugepage pdes mapping same physical address with different access Avi Kivity
2007-04-01 14:35                                                               ` [PATCH 32/41] KVM: SVM: Ensure timestamp counter monotonicity Avi Kivity
2007-04-01 14:35                                                                 ` [PATCH 33/41] KVM: Remove unused function Avi Kivity
2007-04-01 14:35                                                                   ` [PATCH 34/41] KVM: Use list_move() Avi Kivity
2007-04-01 14:35                                                                     ` [PATCH 35/41] KVM: Remove debug message Avi Kivity
2007-04-01 14:35                                                                       ` [PATCH 36/41] KVM: x86 emulator: fix bit string operations operand size Avi Kivity
2007-04-01 14:35                                                                         ` [PATCH 37/41] KVM: Add mmu cache clear function Avi Kivity
2007-04-01 14:35                                                                           ` [PATCH 38/41] KVM: Simply gfn_to_page() Avi Kivity
2007-04-01 14:35                                                                             ` [PATCH 39/41] KVM: Add physical memory aliasing feature Avi Kivity
2007-04-01 14:35                                                                               ` [PATCH 40/41] KVM: Add fpu get/set operations Avi Kivity
2007-04-01 14:35                                                                                 ` Avi Kivity [this message]

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=11754381403398-git-send-email-avi@qumranet.com \
    --to=avi@qumranet.com \
    --cc=joerg.roedel@amd.com \
    --cc=kvm-devel@lists.sourceforge.net \
    --cc=linux-kernel@vger.kernel.org \
    --subject='Re: [PATCH 41/41] KVM: SVM: enable LBRV virtualization if available' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).