Message ID | 20170616185447.18967.8792.stgit@tlendack-t1.amdoffice.net (mailing list archive) |
---|---|
State | New, archived |
Headers | show
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DM5PR12MB1147; 20:xvldKa3sIGn26QwczikoRrEBz5lZdHC2neEafFF3ptWlv4WdyAq6dXGwAiX7udtgkTLyK7kUK86ruZ+mT1eEkkaFtIbJxHb55uEINNYC4Ku+by9pTQSdKDlnI4TiUvzacksMKDqm6+eWmtTvorZlbj2SlIk7Ge0O2FdgQ0sKsu7kiENDpuAry+F+rOXxpdS9hDqGleuudlxVur4faATaTqcLmE4bypnTFKACNvY1Mx7wZpK2ddvmj3zTzdtmqpSZ X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 16 Jun 2017 18:54:50.4525 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM5PR12MB1147 Cc: Brijesh Singh <brijesh.singh@amd.com>, Toshimitsu Kani <toshi.kani@hpe.com>, "Michael S. Tsirkin" <mst@redhat.com>, Matt Fleming <matt@codeblueprint.co.uk>, Alexander Potapenko <glider@google.com>, "H. Peter Anvin" <hpa@zytor.com>, Boris Ostrovsky <boris.ostrovsky@oracle.com>, Jonathan Corbet <corbet@lwn.net>, Joerg Roedel <joro@8bytes.org>, Radim =?utf-8?b?S3LEjW3DocWZ?= <rkrcmar@redhat.com>, Larry Woodman <lwoodman@redhat.com>, Ingo Molnar <mingo@redhat.com>, Andrey Ryabinin <aryabinin@virtuozzo.com>, Dave Young <dyoung@redhat.com>, Rik van Riel <riel@redhat.com>, Arnd Bergmann <arnd@arndb.de>, Borislav Petkov <bp@alien8.de>, Andy Lutomirski <luto@kernel.org>, Thomas Gleixner <tglx@linutronix.de>, Dmitry Vyukov <dvyukov@google.com>, Juergen Gross <jgross@suse.com>, Paolo Bonzini <pbonzini@redhat.com> Subject: [Xen-devel] [PATCH v7 26/36] x86/CPU/AMD: Make the microcode level available earlier in the boot X-BeenThere: xen-devel@lists.xen.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Xen developer discussion <xen-devel.lists.xen.org> List-Unsubscribe: <https://lists.xen.org/cgi-bin/mailman/options/xen-devel>, <mailto:xen-devel-request@lists.xen.org?subject=unsubscribe> List-Post: <mailto:xen-devel@lists.xen.org> List-Help: <mailto:xen-devel-request@lists.xen.org?subject=help> List-Subscribe: <https://lists.xen.org/cgi-bin/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xen.org?subject=subscribe> Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" <xen-devel-bounces@lists.xen.org> X-Virus-Scanned: ClamAV using ClamSMTP |
On Fri, Jun 16, 2017 at 01:54:47PM -0500, Tom Lendacky wrote: > Move the setting of the cpuinfo_x86.microcode field from amd_init() to > early_amd_init() so that it is available earlier in the boot process. This > avoids having to read MSR_AMD64_PATCH_LEVEL directly during early boot. > > Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> > --- > arch/x86/kernel/cpu/amd.c | 8 ++++---- > 1 file changed, 4 insertions(+), 4 deletions(-) Reviewed-by: Borislav Petkov <bp@suse.de>
diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c index 5bdcbd4..fdcf305 100644 --- a/arch/x86/kernel/cpu/amd.c +++ b/arch/x86/kernel/cpu/amd.c @@ -547,8 +547,12 @@ static void bsp_init_amd(struct cpuinfo_x86 *c) static void early_init_amd(struct cpuinfo_x86 *c) { + u32 dummy; + early_init_amd_mc(c); + rdmsr_safe(MSR_AMD64_PATCH_LEVEL, &c->microcode, &dummy); + /* * c->x86_power is 8000_0007 edx. Bit 8 is TSC runs at constant rate * with P/T states and does not stop in deep C-states @@ -746,8 +750,6 @@ static void init_amd_bd(struct cpuinfo_x86 *c) static void init_amd(struct cpuinfo_x86 *c) { - u32 dummy; - early_init_amd(c); /* @@ -809,8 +811,6 @@ static void init_amd(struct cpuinfo_x86 *c) if (c->x86 > 0x11) set_cpu_cap(c, X86_FEATURE_ARAT); - rdmsr_safe(MSR_AMD64_PATCH_LEVEL, &c->microcode, &dummy); - /* 3DNow or LM implies PREFETCHW */ if (!cpu_has(c, X86_FEATURE_3DNOWPREFETCH)) if (cpu_has(c, X86_FEATURE_3DNOW) || cpu_has(c, X86_FEATURE_LM))
Move the setting of the cpuinfo_x86.microcode field from amd_init() to early_amd_init() so that it is available earlier in the boot process. This avoids having to read MSR_AMD64_PATCH_LEVEL directly during early boot. Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> --- arch/x86/kernel/cpu/amd.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)