From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alexey Makhalov Subject: [PATCH 2/3] x86/vmware: Add basic paravirt ops support Date: Tue, 25 Oct 2016 22:26:00 -0700 Message-ID: <20161026052600.77535-1-amakhalov__22752.6522161954$1477935983$gmane$org@vmware.com> References: <20161026052038.77042-1-amakhalov@vmware.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20161026052038.77042-1-amakhalov@vmware.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: virtualization-bounces@lists.linux-foundation.org Errors-To: virtualization-bounces@lists.linux-foundation.org To: corbet@lwn.net, akataria@vmware.com, tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com, x86@kernel.org Cc: time-lords@vmware.com, monitor-list@vmware.com, pv-drivers@vmware.com, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org, Alexey Makhalov List-Id: virtualization@lists.linuxfoundation.org Add basic paravirt support: 1. set pv_info.name to "VMware" to have proper boot log message Booting paravirtualized kernel on VMware instead of "... on bare hardware" 2. set pv_cpu_ops.io_delay() to empty function - paravirt_nop() to avoid vm-exits on IO delays. Signed-off-by: Alexey Makhalov Acked-by: Alok N Kataria --- arch/x86/kernel/cpu/vmware.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/arch/x86/kernel/cpu/vmware.c b/arch/x86/kernel/cpu/vmware.c index 480790f..e3fb320 100644 --- a/arch/x86/kernel/cpu/vmware.c +++ b/arch/x86/kernel/cpu/vmware.c @@ -61,6 +61,16 @@ static unsigned long vmware_get_tsc_khz(void) return vmware_tsc_khz; } +#ifdef CONFIG_PARAVIRT +static void __init vmware_paravirt_ops_setup(void) +{ + pv_info.name = "VMware"; + pv_cpu_ops.io_delay = paravirt_nop; +} +#else +#define vmware_paravirt_ops_setup() do {} while (0) +#endif + static void __init vmware_platform_setup(void) { uint32_t eax, ebx, ecx, edx; @@ -94,6 +104,8 @@ static void __init vmware_platform_setup(void) } else { pr_warn("Failed to get TSC freq from the hypervisor\n"); } + + vmware_paravirt_ops_setup(); } /* -- 2.10.1