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([185.25.67.249]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-a780a87204esm343023466b.222.2024.07.12.06.08.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 12 Jul 2024 06:08:08 -0700 (PDT) X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: c91a45ad-404f-11ef-bbfb-fd08da9f4363 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cloud.com; s=cloud; t=1720789688; x=1721394488; darn=lists.xenproject.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=jqoFysOPJW7YOcR+zHukiDmJkfpnoSrHwiTuqUDKgjg=; b=GQPIkuuB3KsahwLKvDLfq2k52enIkRK72/qt0wtToSLSclVdUTLVvoPg50CEg6T9a4 xaO909eBK78qlsqS4yjX7wFC/FojXytevISsbzPAjDVIFkOHGc8Tmt5R49GukFoztXQc 29FwButSma26VSKcIft6lcJN2D5YSEQJEpiZY= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1720789688; x=1721394488; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=jqoFysOPJW7YOcR+zHukiDmJkfpnoSrHwiTuqUDKgjg=; b=FlOJjsumgtRIuAJ7ANkC/dWU1nKtcV+7Iz/Jd7mGcgLYIk4nP478CxCxvqyPMwo4+9 rTORICSK/RmqZ2lj7pFd0jfJyy0TGoRbEPewgHVgIZYJU+4Ajc+/yyVHZd1Xh/VYY7Rb nkE1frYYHtpTLsB1uYx7Y5P/bb0/W8J1eT9NuFF33464+SRM3LUrk8JT/rKe3qrr+lA3 8ZU9X4WrT7bfGU45L0wHWWu9RzhR/xfVxTbkxtQ2ufvjTr9U+ubfemyzWNGJCX4dzao6 zk3FpeUEIbVr6GV113DblfZlmqQd3miO8Rrtg4B/9mbKjHt6JDy6Skbnb3U5693DqDA1 WtyQ== X-Gm-Message-State: AOJu0YwS+HLQ4+Imc5MlxpTAOXYIXPDaD3Yim3qtiEPabxyKit6L4KO6 jIe09C2B9X7BjZKqmqrbvNtXBDUdPqMSUJS2O2mWYEKLEhkNJA8y9cFp6FXPihnUDD1A/bo1zZe 1 X-Google-Smtp-Source: AGHT+IFx6EKhvldcxltz8Bf/zA2EMBfrB1gPUnalA9jLVj+vwXAgBj4MP4VYm+7dkHZrfxPaNuMtag== X-Received: by 2002:a17:906:f0cc:b0:a6f:e819:da9c with SMTP id a640c23a62f3a-a780b70539bmr738906466b.43.1720789688335; Fri, 12 Jul 2024 06:08:08 -0700 (PDT) From: Fouad Hilly To: xen-devel@lists.xenproject.org Cc: Fouad Hilly , Anthony PERARD , Juergen Gross , Andrew Cooper Subject: [PATCH v5 3/4] x86/ucode: Introduce --force option to xen-ucode Date: Fri, 12 Jul 2024 14:07:48 +0100 Message-ID: <20240712130749.1272741-4-fouad.hilly@cloud.com> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20240712130749.1272741-1-fouad.hilly@cloud.com> References: <20240712130749.1272741-1-fouad.hilly@cloud.com> MIME-Version: 1.0 Introduce --force option to xen-ucode to force skipping microcode version check, which allows the user to update x86 microcode even if both versions are the same or downgrade. xc_microcode_update() refactored to accept flags and utilize xenpf_microcode_update2. Signed-off-by: Fouad Hilly Reviewed-by: Andrew Cooper --- [v5] 1- Update commit message. 2- Re-phrase --force option description. [v4] 1- Add --force to xen-ucode options. 2- Update xc_microcode_update() to accept and handle flags. --- tools/include/xenctrl.h | 3 ++- tools/libs/ctrl/xc_misc.c | 12 +++++++----- tools/misc/xen-ucode.c | 13 +++++++++++-- 3 files changed, 20 insertions(+), 8 deletions(-) diff --git a/tools/include/xenctrl.h b/tools/include/xenctrl.h index 9ceca0cffc2f..2c4608c09ab0 100644 --- a/tools/include/xenctrl.h +++ b/tools/include/xenctrl.h @@ -1171,7 +1171,8 @@ typedef uint32_t xc_node_to_node_dist_t; int xc_physinfo(xc_interface *xch, xc_physinfo_t *info); int xc_cputopoinfo(xc_interface *xch, unsigned *max_cpus, xc_cputopo_t *cputopo); -int xc_microcode_update(xc_interface *xch, const void *buf, size_t len); +int xc_microcode_update(xc_interface *xch, const void *buf, + size_t len, unsigned int flags); int xc_get_cpu_version(xc_interface *xch, struct xenpf_pcpu_version *cpu_ver); int xc_get_ucode_revision(xc_interface *xch, struct xenpf_ucode_revision *ucode_rev); diff --git a/tools/libs/ctrl/xc_misc.c b/tools/libs/ctrl/xc_misc.c index 50282fd60dcc..6a60216bda03 100644 --- a/tools/libs/ctrl/xc_misc.c +++ b/tools/libs/ctrl/xc_misc.c @@ -203,11 +203,12 @@ int xc_physinfo(xc_interface *xch, return 0; } -int xc_microcode_update(xc_interface *xch, const void *buf, size_t len) +int xc_microcode_update(xc_interface *xch, const void *buf, + size_t len, unsigned int flags) { int ret; struct xen_platform_op platform_op = {}; - DECLARE_HYPERCALL_BUFFER(struct xenpf_microcode_update, uc); + DECLARE_HYPERCALL_BUFFER(struct xenpf_microcode_update2, uc); uc = xc_hypercall_buffer_alloc(xch, uc, len); if ( uc == NULL ) @@ -215,9 +216,10 @@ int xc_microcode_update(xc_interface *xch, const void *buf, size_t len) memcpy(uc, buf, len); - platform_op.cmd = XENPF_microcode_update; - platform_op.u.microcode.length = len; - set_xen_guest_handle(platform_op.u.microcode.data, uc); + platform_op.cmd = XENPF_microcode_update2; + platform_op.u.microcode2.length = len; + platform_op.u.microcode2.flags = flags; + set_xen_guest_handle(platform_op.u.microcode2.data, uc); ret = do_platform_op(xch, &platform_op); diff --git a/tools/misc/xen-ucode.c b/tools/misc/xen-ucode.c index 8de82e5b8a10..a0eb3f205341 100644 --- a/tools/misc/xen-ucode.c +++ b/tools/misc/xen-ucode.c @@ -13,6 +13,8 @@ #include #include +#include + static xc_interface *xch; static const char intel_id[] = "GenuineIntel"; @@ -79,6 +81,8 @@ static void usage(FILE *stream, const char *name) "options:\n" " -h, --help display this help\n" " -s, --show-cpu-info show CPU information\n" + " -f, --force skip certain checks; do not use unless you" + "know exactly what you are doing\n" "Usage: %s [microcode file] [options]\n", name, name); show_curr_cpu(stream); } @@ -88,6 +92,7 @@ int main(int argc, char *argv[]) static const struct option options[] = { {"help", no_argument, NULL, 'h'}, {"show-cpu-info", no_argument, NULL, 's'}, + {"force", no_argument, NULL, 'f'}, {NULL, no_argument, NULL, 0} }; int fd, ret; @@ -95,6 +100,7 @@ int main(int argc, char *argv[]) size_t len; struct stat st; int opt; + uint32_t ucode_flags = 0; xch = xc_interface_open(NULL, NULL, 0); if ( xch == NULL ) @@ -104,7 +110,7 @@ int main(int argc, char *argv[]) exit(1); } - while ( (opt = getopt_long(argc, argv, "hs", options, NULL)) != -1 ) + while ( (opt = getopt_long(argc, argv, "hsf", options, NULL)) != -1 ) { switch (opt) { @@ -116,6 +122,9 @@ int main(int argc, char *argv[]) show_curr_cpu(stdout); exit(EXIT_SUCCESS); + case 'f': + ucode_flags = XENPF_UCODE_FORCE; + break; default: goto ext_err; } @@ -156,7 +165,7 @@ int main(int argc, char *argv[]) } errno = 0; - ret = xc_microcode_update(xch, buf, len); + ret = xc_microcode_update(xch, buf, len, ucode_flags); if ( ret == -1 && errno == EEXIST ) printf("Microcode already up to date\n"); else if ( ret )