/* * xfrm6_mode_beet.c - BEET mode encapsulation for IPv6. * * Copyright (c) 2006 Diego Beltrami * Miika Komu * Herbert Xu * Abhinav Pathak * Jeff Ahrenholz */ #include #include #include #include #include #include #include #include #include #include static void xfrm6_beet_make_header(struct sk_buff *skb) { struct ipv6hdr *iph = ipv6_hdr(skb); iph->version = 6; memcpy(iph->flow_lbl, XFRM_MODE_SKB_CB(skb)->flow_lbl, sizeof(iph->flow_lbl)); iph->nexthdr = XFRM_MODE_SKB_CB(skb)->protocol; ipv6_change_dsfield(iph, 0, XFRM_MODE_SKB_CB(skb)->tos); iph->hop_limit = XFRM_MODE_SKB_CB(skb)->ttl; } /* Add encapsulation header. * * The top IP header will be constructed per draft-nikander-esp-beet-mode-06.txt. */ static int xfrm6_beet_output(struct xfrm_state *x, struct sk_buff *skb) { struct ipv6hdr *top_iph; struct ip_beet_phdr *ph; int optlen, hdr_len; hdr_len = 0; optlen = XFRM_MODE_SKB_CB(skb)->optlen; if (unlikely(optlen)) hdr_len += IPV4_BEET_PHMAXLEN - (optlen & 4); skb_set_network_header(skb, -x->props.header_len - hdr_len); if (x->sel.family != AF_INET6) skb->network_header += IPV4_BEET_PHMAXLEN; skb->mac_header = skb->network_header + offsetof(struct ipv6hdr, nexthdr); skb->transport_header = skb->network_header + sizeof(*top_iph); ph = (struct ip_beet_phdr *)__skb_pull(skb, XFRM_MODE_SKB_CB(skb)->ihl-hdr_len); xfrm6_beet_make_header(skb); top_iph = ipv6_hdr(skb); if (unlikely(optlen)) { BUG_ON(optlen < 0); ph->padlen = 4 - (optlen & 4); ph->hdrlen = optlen / 8; ph->nexthdr = top_iph->nexthdr; if (ph->padlen) memset(ph + 1, IPOPT_NOP, ph->padlen); top_iph->nexthdr = IPPROTO_BEETPH; } top_iph->saddr = *(struct in6_addr *)&x->props.saddr; top_iph->daddr = *(struct in6_addr *)&x->id.daddr; return 0; } static int xfrm6_beet_input(struct xfrm_state *x, struct sk_buff *skb) { struct ipv6hdr *ip6h; int size = sizeof(struct ipv6hdr); int err; err = skb_cow_head(skb, size + skb->mac_len); if (err) goto out; __skb_push(skb, size); skb_reset_network_header(skb); skb_mac_header_rebuild(skb); xfrm6_beet_make_header(skb); ip6h = ipv6_hdr(skb); ip6h->payload_len = htons(skb->len - size); ip6h->daddr = x->sel.daddr.in6; ip6h->saddr = x->sel.saddr.in6; err = 0; out: return err; } static struct xfrm_mode xfrm6_beet_mode = { .input2 = xfrm6_beet_input, .input = xfrm_prepare_input, .output2 = xfrm6_beet_output, .output = xfrm6_prepare_output, .owner = THIS_MODULE, .encap = XFRM_MODE_BEET, .flags = XFRM_MODE_FLAG_TUNNEL, }; static int __init xfrm6_beet_init(void) { return xfrm_register_mode(&xfrm6_beet_mode, AF_INET6); } static void __exit xfrm6_beet_exit(void) { int err; err = xfrm_unregister_mode(&xfrm6_beet_mode, AF_INET6); BUG_ON(err); } module_init(xfrm6_beet_init); module_exit(xfrm6_beet_exit); MODULE_LICENSE("GPL"); MODULE_ALIAS_XFRM_MODE(AF_INET6, XFRM_MODE_BEET); =nds-private-remove&id=6e978b22efa1db9f6e71b24440b5f1d93e968ee3'>soc/codecs/rt5514-spi.c
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authorSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>2017-02-03 14:18:39 -0800
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2017-02-04 00:11:08 +0100
commit6e978b22efa1db9f6e71b24440b5f1d93e968ee3 (patch)
treec666f7a26b860674848949e39a610222b0723f89 /sound/soc/codecs/rt5514-spi.c
parent3c223c19aea85d3dda1416c187915f4a30b04b1f (diff)
cpufreq: intel_pstate: Disable energy efficiency optimization
Some Kabylake desktop processors may not reach max turbo when running in HWP mode, even if running under sustained 100% utilization. This occurs when the HWP.EPP (Energy Performance Preference) is set to "balance_power" (0x80) -- the default on most systems. It occurs because the platform BIOS may erroneously enable an energy-efficiency setting -- MSR_IA32_POWER_CTL BIT-EE, which is not recommended to be enabled on this SKU. On the failing systems, this BIOS issue was not discovered when the desktop motherboard was tested with Windows, because the BIOS also neglects to provide the ACPI/CPPC table, that Windows requires to enable HWP, and so Windows runs in legacy P-state mode, where this setting has no effect. Linux' intel_pstate driver does not require ACPI/CPPC to enable HWP, and so it runs in HWP mode, exposing this incorrect BIOS configuration. There are several ways to address this problem. First, Linux can also run in legacy P-state mode on this system. As intel_pstate is how Linux enables HWP, booting with "intel_pstate=disable" will run in acpi-cpufreq/ondemand legacy p-state mode. Or second, the "performance" governor can be used with intel_pstate, which will modify HWP.EPP to 0. Or third, starting in 4.10, the /sys/devices/system/cpu/cpufreq/policy*/energy_performance_preference attribute in can be updated from "balance_power" to "performance". Or fourth, apply this patch, which fixes the erroneous setting of MSR_IA32_POWER_CTL BIT_EE on this model, allowing the default configuration to function as designed. Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Reviewed-by: Len Brown <len.brown@intel.com> Cc: 4.6+ <stable@vger.kernel.org> # 4.6+ Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'sound/soc/codecs/rt5514-spi.c')